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Peralta G, CaraDonna PJ, Rakosy D, Fründ J, Pascual Tudanca MP, Dormann CF, Burkle LA, Kaiser-Bunbury CN, Knight TM, Resasco J, Winfree R, Blüthgen N, Castillo WJ, Vázquez DP. Predicting plant-pollinator interactions: concepts, methods, and challenges. Trends Ecol Evol 2024; 39:494-505. [PMID: 38262775 DOI: 10.1016/j.tree.2023.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 12/06/2023] [Accepted: 12/11/2023] [Indexed: 01/25/2024]
Abstract
Plant-pollinator interactions are ecologically and economically important, and, as a result, their prediction is a crucial theoretical and applied goal for ecologists. Although various analytical methods are available, we still have a limited ability to predict plant-pollinator interactions. The predictive ability of different plant-pollinator interaction models depends on the specific definitions used to conceptualize and quantify species attributes (e.g., morphological traits), sampling effects (e.g., detection probabilities), and data resolution and availability. Progress in the study of plant-pollinator interactions requires conceptual and methodological advances concerning the mechanisms and species attributes governing interactions as well as improved modeling approaches to predict interactions. Current methods to predict plant-pollinator interactions present ample opportunities for improvement and spark new horizons for basic and applied research.
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Affiliation(s)
- Guadalupe Peralta
- Multidisciplinary Institute of Plant Biology, National Council for Scientific and Technical Research (CONICET)-National University of Córdoba, Córdoba, X5016GCN, Argentina.
| | - Paul J CaraDonna
- Chicago Botanic Garden, Negaunee Institute for Plant Conservation Science and Action, Glencoe, IL 60022, USA; Plant Biology and Conservation, Northwestern University, Evanston, IL 60201, USA
| | - Demetra Rakosy
- Department for Community Ecology, Helmholtz Centre for Environmental Research (UFZ), Leipzig 04318, Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig 04103, Germany
| | - Jochen Fründ
- Biometry and Environmental System Analysis, University of Freiburg, Freiburg 79098, Germany; Animal Network Ecology, Department of Biology, University of Hamburg, Hamburg 20148, Germany
| | - María P Pascual Tudanca
- Argentine Institute for Dryland Research, National Council for Scientific and Technical Research (CONICET)-National University of Cuyo, Mendoza 5500, Argentina
| | - Carsten F Dormann
- Biometry and Environmental System Analysis, University of Freiburg, Freiburg 79098, Germany
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT 59717, USA
| | - Christopher N Kaiser-Bunbury
- Centre for Ecology and Conservation, Faculty of Environment, Science and Economy, University of Exeter, Penryn Campus, Penryn TR10 9FE, UK
| | - Tiffany M Knight
- Department for Community Ecology, Helmholtz Centre for Environmental Research (UFZ), Leipzig 04318, Germany; German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig 04103, Germany; Institute of Biology, Martin Luther University Halle-Wittenberg, Halle (Saale) 06108, Germany
| | - Julian Resasco
- Department of Ecology & Evolutionary Biology, University of Colorado, Boulder, CO 80309, USA
| | - Rachael Winfree
- Department of Ecology, Evolution & Natural Resources, Rutgers University, New Brunswick, NJ 08901, USA
| | - Nico Blüthgen
- Ecological Networks Lab, Technische Universität Darmstadt, Darmstadt 64287, Germany
| | - William J Castillo
- Biometry and Environmental System Analysis, University of Freiburg, Freiburg 79098, Germany
| | - Diego P Vázquez
- Argentine Institute for Dryland Research, National Council for Scientific and Technical Research (CONICET)-National University of Cuyo, Mendoza 5500, Argentina; Faculty of Exact and Natural Sciences, National University of Cuyo, Mendoza M5502, Argentina.
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2
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Meinzen TC, Burkle LA, Debinski DM. Roadside habitat: Boon or bane for pollinating insects? Bioscience 2024; 74:54-64. [PMID: 38313561 PMCID: PMC10831221 DOI: 10.1093/biosci/biad111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 11/19/2023] [Accepted: 11/27/2023] [Indexed: 02/06/2024] Open
Abstract
Pollinators, which provide vital services to wild ecosystems and agricultural crops, are facing global declines and habitat loss. As undeveloped land becomes increasingly scarce, much focus has been directed recently to roadsides as potential target zones for providing floral resources to pollinators. Roadsides, however, are risky places for pollinators, with threats from vehicle collisions, toxic pollutants, mowing, herbicides, and more. Although these threats have been investigated, most studies have yet to quantify the costs and benefits of roadsides to pollinators and, therefore, do not address whether the costs outweigh the benefits for pollinator populations using roadside habitats. In this article, we address how, when, and under what conditions roadside habitats may benefit or harm pollinators, reviewing existing knowledge and recommending practical questions that managers and policymakers should consider when planning pollinator-focused roadside management.
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Affiliation(s)
- Thomas C Meinzen
- Ecology Department, Montana State University, Bozeman, Montana, United States
| | - Laura A Burkle
- Ecology Department, Montana State University, Bozeman, Montana, United States
| | - Diane M Debinski
- Ecology Department, Montana State University, Bozeman, Montana, United States
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3
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Alejandre EM, Scherer L, Guinée JB, Aizen MA, Albrecht M, Balzan MV, Bartomeus I, Bevk D, Burkle LA, Clough Y, Cole LJ, Delphia CM, Dicks LV, Garratt MP, Kleijn D, Kovács-Hostyánszki A, Mandelik Y, Paxton RJ, Petanidou T, Potts S, Sárospataki M, Schulp CJ, Stavrinides M, Stein K, Stout JC, Szentgyörgyi H, Varnava AI, Woodcock BA, van Bodegom PM. Characterization Factors to Assess Land Use Impacts on Pollinator Abundance in Life Cycle Assessment. Environ Sci Technol 2023; 57:3445-3454. [PMID: 36780611 PMCID: PMC9979645 DOI: 10.1021/acs.est.2c05311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 01/31/2023] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
While wild pollinators play a key role in global food production, their assessment is currently missing from the most commonly used environmental impact assessment method, Life Cycle Assessment (LCA). This is mainly due to constraints in data availability and compatibility with LCA inventories. To target this gap, relative pollinator abundance estimates were obtained with the use of a Delphi assessment, during which 25 experts, covering 16 nationalities and 45 countries of expertise, provided scores for low, typical, and high expected abundance associated with 24 land use categories. Based on these estimates, this study presents a set of globally generic characterization factors (CFs) that allows translating land use into relative impacts to wild pollinator abundance. The associated uncertainty of the CFs is presented along with an illustrative case to demonstrate the applicability in LCA studies. The CFs based on estimates that reached consensus during the Delphi assessment are recommended as readily applicable and allow key differences among land use types to be distinguished. The resulting CFs are proposed as the first step for incorporating pollinator impacts in LCA studies, exemplifying the use of expert elicitation methods as a useful tool to fill data gaps that constrain the characterization of key environmental impacts.
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Affiliation(s)
- Elizabeth M. Alejandre
- Institute
of Environmental Sciences (CML), Leiden
University, P.O. Box 9518, 2300 RA Leiden, The Netherlands
- Delft
University of Technology, Mekelweg 5, 2628 CD Delft, The Netherlands
| | - Laura Scherer
- Institute
of Environmental Sciences (CML), Leiden
University, P.O. Box 9518, 2300 RA Leiden, The Netherlands
| | - Jeroen B. Guinée
- Institute
of Environmental Sciences (CML), Leiden
University, P.O. Box 9518, 2300 RA Leiden, The Netherlands
| | - Marcelo A. Aizen
- Grupo
de Ecología de la Polinización, INIBIOMA, Universidad
Nacional del Comahue-CONICET, Quintral 1250, 8400 Bariloche, Río Negro, Argentina
| | - Matthias Albrecht
- Agroecology
and Environment, Agroscope, Reckenholzstrasse 191, 8046 Zurich, Switzerland
| | - Mario V. Balzan
- Institute
of Applied Sciences, Malta College of Arts,
Science and Technology (MCAST), PLA9032 Paola, Malta
| | - Ignasi Bartomeus
- Estación
Biológica de Doñana (EBD-CSIC), Avda. Américo Vespucio 26, Isla de la Cartuja, E-41092 Sevilla, Spain
| | - Danilo Bevk
- National
Institute of Biology, 1000 Ljubljana, Slovenia
| | - Laura A. Burkle
- Department
of Ecology, Montana State University, Bozeman, Montana 59717, United States
| | - Yann Clough
- Centre
for Environmental and Climate Science, Lund
University, Sölvegatan
37, 22362 Lund Sweden
| | - Lorna J. Cole
- Integrated Land Management, SRUC, JF Niven Building, Auchincruive
Estate, KA6 5HW AYR, U.K.
| | - Casey M. Delphia
- Montana Entomology Collection, Montana
State University, Room 50 Marsh
Laboratory, Bozeman, Montana 59717, United States
| | - Lynn V. Dicks
- Department of Zoology, University of Cambridge, Downing Street, CB2 3EJ Cambridge U.K.
- School of Biological Sciences, University
of East Anglia, Norwich
Research Park, NR4 7TJ Norwich U.K.
| | | | - David Kleijn
- Plant Ecology
and Nature Conservation Group, Wageningen
University & Research, Droevendaalsesteeg 3a, 6708 PB Wageningen, The Netherlands
| | - Anikó Kovács-Hostyánszki
- Centre
for Ecological Research, Institute of Ecology and Botany, Lendület Ecosystem Services Research Group, Alkotmány str. 2-4, H-2163 Vácrátót, Hungary
| | - Yael Mandelik
- Department of Entomology, Faculty of Agriculture
Food and Environment, The Hebrew University
of Jerusalem, P.O.Box 12, 7610001 Rehovot, Israel
| | - Robert J. Paxton
- Institute for Biology, Martin
Luther University
Halle-Wittenberg, Halle-Jena-Leipzig, Hoher Weg 8, 06120 Halle (Saale), Germany
- German
Centre for Integrative Biodiversity Research (iDiv), Puschstrasse 4, 04103 Leipzig, Germany
| | - Theodora Petanidou
- Laboratory
of Biogeography and Ecology, Department of Geography, University of the Aegean, 81100 Mytilene, Greece
| | - Simon Potts
- University
of Reading, RG6 6AR Reading, U.K.
| | - Miklós Sárospataki
- Department of Zoology and Ecology, Institute
for Wildlife
Management and Nature Conservation, Hungarian
University of Agriculture and Life Sciences, Páter K. u. 1., H2100 Gödöllő, Hungary
| | - Catharina J.E. Schulp
- Department of Environmental Geography,
Institute for
Environmental Studies, Vrije Universiteit
Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands
| | - Menelaos Stavrinides
- Department of Agricultural Sciences, Cyprus
University of Technology, Arch. Kyprianos 30, 3036 Lemesos, Cyprus
| | - Katharina Stein
- Institute of Biological Sciences, Department of Botany
and Botanical Garden, University of Rostock, Wismarsche Strasse 45, 18051 Rostock, Germany
| | - Jane C. Stout
- Trinity College Dublin, College Green, D02
PN40 Dublin 2, Ireland
| | - Hajnalka Szentgyörgyi
- Department
of Plant Ecology, Institute of Botany, Jagiellonian
University, ul. Gronostajowa
3, 30-387 Kraków, Poland
| | - Androulla I. Varnava
- Department of Agricultural Sciences, Cyprus
University of Technology, Arch. Kyprianos 30, 3036 Lemesos, Cyprus
| | - Ben A. Woodcock
- UK Centre for Ecology & Hydrology, Crowmarsh Gifford, Wallingford, Oxfordshire OX10 8BB, U.K.
| | - Peter M. van Bodegom
- Institute
of Environmental Sciences (CML), Leiden
University, P.O. Box 9518, 2300 RA Leiden, The Netherlands
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O’Neill KM, O’Neill RP, Delphia CM, Burkle LA, Runyon JB. Diversity and distribution of orchid bees (Hymenoptera: Apidae, Euglossini) in Belize. PeerJ 2023; 11:e14928. [PMID: 36846459 PMCID: PMC9948752 DOI: 10.7717/peerj.14928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 01/30/2023] [Indexed: 02/22/2023] Open
Abstract
Background Orchid bees are abundant and widespread in the Neotropics, where males are important pollinators of orchids they visit to collect fragrant chemicals later used to court females. Assemblages of orchid bees have been intensively surveyed in parts of Central America, but less so in Belize, where we studied them during the late-wet and early-dry seasons of 2015-2020. Methods Using bottle-traps baited with chemicals known to attract a variety of orchid bee species, we conducted surveys at sites varying in latitude, historical annual precipitation, elevation, and the presence of nearby agricultural activities. Each sample during each survey period consisted of the same number of traps and the same set of chemical baits, their positions randomized along transects. Results In 86 samples, we collected 24 species in four genera: Euglossa (16 species), Eulaema (3), Eufriesea (3), and Exaerete (2). During our most extensive sampling (December 2016-February 2017), species diversity was not correlated with latitude, precipitation, or elevation; species richness was correlated only with precipitation (positively). However, a canonical correspondence analysis indicated that species composition of assemblages varied across all three environmental gradients, with species like Eufriesea concava, Euglossa imperialis, and Euglossa viridissima most common in the drier north, and Euglossa ignita, Euglossa purpurea, and Eulaema meriana more so in the wetter southeast. Other species, such as Euglossa tridentata and Eulaema cingulata, were common throughout the area sampled. Mean species diversity was higher at sites with agricultural activities than at sites separated from agricultural areas. A Chao1 analysis suggests that other species should yet be found at our sites, a conclusion supported by records from adjacent countries, as well as the fact that we often added new species with repeated surveys of the same sites up through early 2020, and with the use of alternative baits. Additional species may be especially likely if sampling occurs outside of the months/seasons that we have sampled so far.
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Affiliation(s)
- Kevin M. O’Neill
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT, United States
| | - Ruth P. O’Neill
- Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT, United States
| | - Casey M. Delphia
- Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT, United States
| | - Laura A. Burkle
- Ecology Department, Montana State University, Bozeman, MT, United States
| | - Justin B. Runyon
- Rocky Mountain Research Station, U.S.D.A., United States Forest Service, Bozeman, MT, United States
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5
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Burkle LA, Zabinski CA. Mycorrhizae influence plant vegetative and floral traits and intraspecific trait variation. Am J Bot 2023; 110:e16099. [PMID: 36371729 DOI: 10.1002/ajb2.16099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 10/19/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
PREMISE Arbuscular mycorrhizal fungi (AMF) can strongly influence host plant vegetative growth, but less is known about AMF effects on other plant traits, the relative impacts of AMF on vegetative growth versus floral traits, or AMF-induced intraspecific variation in traits. METHODS In an experimental greenhouse study, we inoculated seven species of wildflowers with six species of AMF in a factorial design. We assessed how the AMF-forb combinations influenced plant survival, vegetative biomass, and floral traits and whether AMF effects on floral traits were similar in magnitude and direction to effects on vegetative biomass. For one forb species, we investigated intraspecific plant trait variation within and across AMF treatments. RESULTS AMF species varied from negative to positive in their effects on host plants. AMF often had inconsistent effects on vegetative biomass versus floral traits, and therefore, quantifying one or the other may provide a misleading representation of potential AMF effects. AMF treatments generated key variation in plant traits, especially floral traits, with potential consequences for plant-pollinator interactions. Given increased intraspecific trait variation in Linum lewisii plants across AMF species compared to uninoculated individuals or single AMF treatments, local AMF diversity and their host plant associations may scale up to influence community-wide patterns of trait variation and species interactions. CONCLUSIONS These results have implications for predicting how aboveground communities are affected by belowground communities. Including AMF effects on not just host plant biomass but also functional traits and trait variation will deepen our understanding of community structure and function, including pollination.
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Affiliation(s)
- Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT, 59717, USA
| | - Catherine A Zabinski
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT, 59717, USA
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Park MG, Delphia CM, Prince C, Yocum GD, Rinehart JP, O’Neill KM, Burkle LA, Bowsher JH, Greenlee KJ. Effects of Temperature and Wildflower Strips on Survival and Macronutrient Stores of the Alfalfa Leafcutting Bee (Hymenoptera: Megachilidae) Under Extended Cold Storage. Environ Entomol 2022; 51:958-968. [PMID: 35964238 PMCID: PMC9585370 DOI: 10.1093/ee/nvac062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Indexed: 06/15/2023]
Abstract
Megachile rotundata (F.) is an important pollinator of alfalfa in the United States. Enhancing landscapes with wildflowers is a primary strategy for conserving pollinators and may improve the sustainability of M. rotundata. Changing cold storage temperatures from a traditionally static thermal regime (STR) to a fluctuating thermal regime (FTR) improves overwintering success and extends M. rotundata's shelf life and pollination window. Whether floral resources enhance overwintering survival and/or interact with a thermal regime are unknown. We tested the combined effects of enhancing alfalfa fields with wildflowers and thermal regime on survival and macronutrient stores under extended cold storage (i.e., beyond one season). Megachile rotundata adults were released in alfalfa plots with and without wildflower strips. Completed nests were harvested in September and stored in STR. After a year, cells were randomly assigned to remain in STR for 6 months or in FTR for a year of extended cold storage; emergence rates were observed monthly. Macronutrient levels of emerged females were assessed. FTR improved M. rotundata survival but there was no measurable effect of wildflower strips on overwintering success or nutrient stores. Timing of nest establishment emerged as a key factor: offspring produced late in the season had lower winter survival and dry body mass. Sugars and glycogen stores increased under FTR but not STR. Trehalose levels were similar across treatments. Total lipid stores depleted faster under FTR. While wildflowers did not improve M. rotundata survival, our findings provide mechanistic insight into benefits and potential costs of FTR for this important pollinator.
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Affiliation(s)
| | - Casey M Delphia
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT, USA
- Montana Entomology Collection, Marsh Labs, Montana State University, Bozeman, MT, USA
| | - Cassandra Prince
- Edward T. Schafer Agricultural Research Center, Biosciences Research Laboratory, Fargo, ND, USA
| | - George D Yocum
- Edward T. Schafer Agricultural Research Center, Biosciences Research Laboratory, Fargo, ND, USA
| | - Joseph P Rinehart
- Edward T. Schafer Agricultural Research Center, Biosciences Research Laboratory, Fargo, ND, USA
| | - Kevin M O’Neill
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT, USA
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT, USA
| | - Julia H Bowsher
- Department of Biological Sciences, North Dakota State University, Fargo, ND, USA
| | - Kendra J Greenlee
- Department of Biological Sciences, North Dakota State University, Fargo, ND, USA
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Bieber BV, Vyas DK, Koltz AM, Burkle LA, Bey KS, Guzinski C, Murphy SM, Vidal MC. Increasing prevalence of severe fires change the structure of arthropod communities: evidence from a meta‐analysis. Funct Ecol 2022. [DOI: 10.1111/1365-2435.14197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Amanda M. Koltz
- Department of Integrative Biology University of Texas at Austin
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Affiliation(s)
- J. Simone Durney
- Department of Ecology Montana State University Bozeman Montana USA
| | - Arden Engel
- Department of Ecology Montana State University Bozeman Montana USA
| | | | - Laura A. Burkle
- Department of Ecology Montana State University Bozeman Montana USA
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9
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Viljur ML, Abella SR, Adámek M, Alencar JBR, Barber NA, Beudert B, Burkle LA, Cagnolo L, Campos BR, Chao A, Chergui B, Choi CY, Cleary DFR, Davis TS, Dechnik-Vázquez YA, Downing WM, Fuentes-Ramirez A, Gandhi KJK, Gehring C, Georgiev KB, Gimbutas M, Gongalsky KB, Gorbunova AY, Greenberg CH, Hylander K, Jules ES, Korobushkin DI, Köster K, Kurth V, Lanham JD, Lazarina M, Leverkus AB, Lindenmayer D, Marra DM, Martín-Pinto P, Meave JA, Moretti M, Nam HY, Obrist MK, Petanidou T, Pons P, Potts SG, Rapoport IB, Rhoades PR, Richter C, Saifutdinov RA, Sanders NJ, Santos X, Steel Z, Tavella J, Wendenburg C, Wermelinger B, Zaitsev AS, Thorn S. The effect of natural disturbances on forest biodiversity: an ecological synthesis. Biol Rev Camb Philos Soc 2022; 97:1930-1947. [PMID: 35808863 DOI: 10.1111/brv.12876] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 05/12/2022] [Accepted: 05/17/2022] [Indexed: 11/28/2022]
Abstract
Disturbances alter biodiversity via their specific characteristics, including severity and extent in the landscape, which act at different temporal and spatial scales. Biodiversity response to disturbance also depends on the community characteristics and habitat requirements of species. Untangling the mechanistic interplay of these factors has guided disturbance ecology for decades, generating mixed scientific evidence of biodiversity responses to disturbance. Understanding the impact of natural disturbances on biodiversity is increasingly important due to human-induced changes in natural disturbance regimes. In many areas, major natural forest disturbances, such as wildfires, windstorms, and insect outbreaks, are becoming more frequent, intense, severe, and widespread due to climate change and land-use change. Conversely, the suppression of natural disturbances threatens disturbance-dependent biota. Using a meta-analytic approach, we analysed a global data set (with most sampling concentrated in temperate and boreal secondary forests) of species assemblages of 26 taxonomic groups, including plants, animals, and fungi collected from forests affected by wildfires, windstorms, and insect outbreaks. The overall effect of natural disturbances on α-diversity did not differ significantly from zero, but some taxonomic groups responded positively to disturbance, while others tended to respond negatively. Disturbance was beneficial for taxonomic groups preferring conditions associated with open canopies (e.g. hymenopterans and hoverflies), whereas ground-dwelling groups and/or groups typically associated with shady conditions (e.g. epigeic lichens and mycorrhizal fungi) were more likely to be negatively impacted by disturbance. Across all taxonomic groups, the highest α-diversity in disturbed forest patches occurred under moderate disturbance severity, i.e. with approximately 55% of trees killed by disturbance. We further extended our meta-analysis by applying a unified diversity concept based on Hill numbers to estimate α-diversity changes in different taxonomic groups across a gradient of disturbance severity measured at the stand scale and incorporating other disturbance features. We found that disturbance severity negatively affected diversity for Hill number q = 0 but not for q = 1 and q = 2, indicating that diversity-disturbance relationships are shaped by species relative abundances. Our synthesis of α-diversity was extended by a synthesis of disturbance-induced change in species assemblages, and revealed that disturbance changes the β-diversity of multiple taxonomic groups, including some groups that were not affected at the α-diversity level (birds and woody plants). Finally, we used mixed rarefaction/extrapolation to estimate biodiversity change as a function of the proportion of forests that were disturbed, i.e. the disturbance extent measured at the landscape scale. The comparison of intact and naturally disturbed forests revealed that both types of forests provide habitat for unique species assemblages, whereas species diversity in the mixture of disturbed and undisturbed forests peaked at intermediate values of disturbance extent in the simulated landscape. Hence, the relationship between α-diversity and disturbance severity in disturbed forest stands was strikingly similar to the relationship between species richness and disturbance extent in a landscape consisting of both disturbed and undisturbed forest habitats. This result suggests that both moderate disturbance severity and moderate disturbance extent support the highest levels of biodiversity in contemporary forest landscapes.
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Affiliation(s)
- Mari-Liis Viljur
- Field Station Fabrikschleichach, Department of Animal Ecology and Tropical Biology (Zoology III), Julius Maximilians University Würzburg, Glashüttenstraße 5, 96181, Rauhenebrach, Germany
| | - Scott R Abella
- School of Life Sciences, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Las Vegas, NV, 89154-4004, USA
| | - Martin Adámek
- Department of GIS and Remote Sensing, Institute of Botany of the CAS, Průhonice, Czech Republic.,Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Praha 2, Czech Republic
| | - Janderson Batista Rodrigues Alencar
- Instituto Nacional de Pesquisas da Amazônia (INPA), Programa de pós-graduação em Ciências Biológicas (Entomologia), Manaus, AM, 0000-0001-9482-7866, Brazil
| | - Nicholas A Barber
- Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA, 92182-4614, USA
| | | | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT, 59717, USA
| | - Luciano Cagnolo
- Instituto Multidisciplinario de Biología Vegetal (IMBIV), CONICET-Universidad Nacional de Córdoba, Vélez Sarsfield 1611, 5000, Córdoba, Argentina
| | - Brent R Campos
- Point Blue Conservation Science, Petaluma, CA, 94954, USA
| | - Anne Chao
- Institute of Statistics, National Tsing Hua University, Hsin-Chu, 30043, Taiwan
| | - Brahim Chergui
- LESCB URL-CNRST N°18, FS, Abdelmalek Essaadi University, Tetouan, Morocco
| | - Chang-Yong Choi
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, Seoul, 08826, Republic of Korea
| | - Daniel F R Cleary
- CESAM and Department of Biology, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Thomas Seth Davis
- Forest & Rangeland Stewardship, Warner College of Natural Resources, Colorado State University, Fort Collins, CO, 80523, USA
| | - Yanus A Dechnik-Vázquez
- Estudios Ambientales, Centro de Anteproyectos del Golfo, Comisión Federal de Electricidad, Nueva Era, Boca del Río, Veracruz, C.P, 94295, Mexico
| | - William M Downing
- Department of Forest Ecosystems and Society, College of Forestry, Oregon State University, Corvallis, OR, 97331, USA
| | - Andrés Fuentes-Ramirez
- Laboratorio de Biometría, Departamento de Ciencias Forestales, Facultad de Ciencias Agropecuarias y Forestales, Universidad de La Frontera, Temuco, Chile.,Centro Nacional de Excelencia para la Industria de la Madera (CENAMAD), Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Kamal J K Gandhi
- D.B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA, 30602, USA
| | - Catherine Gehring
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, 86011, USA
| | - Kostadin B Georgiev
- Field Station Fabrikschleichach, Department of Animal Ecology and Tropical Biology (Zoology III), Julius Maximilians University Würzburg, Glashüttenstraße 5, 96181, Rauhenebrach, Germany
| | - Mark Gimbutas
- Institute of Mathematics and Statistics, University of Tartu, Narva mnt. 18, 51009, Tartu, Estonia
| | - Konstantin B Gongalsky
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071, Russia
| | - Anastasiya Y Gorbunova
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071, Russia
| | - Cathryn H Greenberg
- USDA Forest Service, Southern Research Station, Bent Creek Experimental Forest, 1577 Brevard Road, Asheville, NC, 28806, USA
| | - Kristoffer Hylander
- Department of Ecology, Environment and Plant Science, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Erik S Jules
- Department of Biological Sciences, Humboldt State University, Arcata, CA, 95521, USA
| | - Daniil I Korobushkin
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071, Russia
| | - Kajar Köster
- Department of Environmental and Biological Sciences, Faculty of Sciences and Forestry, University of Eastern Finland, PL 111, 80101, Joensuu, Finland
| | - Valerie Kurth
- Montana Department of Natural Resources and Conservation, Helena, MT, 59601, USA
| | - Joseph Drew Lanham
- Department of Forest Resources, Clemson University, 261 Lehotsky Hall, Clemson, SC, 29634, USA
| | - Maria Lazarina
- Laboratory of Biogeography & Ecology, Department of Geography, University of the Aegean, University Hill, GR-81100, Mytilene, Greece
| | | | - David Lindenmayer
- Fenner School of Environment and Society, The Australian National University, Canberra, ACT, Australia
| | | | - Pablo Martín-Pinto
- Sustainable Forest Management Research Institute, University of Valladolid, Avda, Madrid, Palencia, Spain
| | - Jorge A Meave
- Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México, Coyoacán, Mexico City, 04510, Mexico
| | - Marco Moretti
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Biodiversity and Conservation Biology, Zürcherstrasse 111, CH-8903, Birmensdorf, Switzerland
| | - Hyun-Young Nam
- School of Biological Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Martin K Obrist
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Biodiversity and Conservation Biology, Zürcherstrasse 111, CH-8903, Birmensdorf, Switzerland
| | - Theodora Petanidou
- Laboratory of Biogeography & Ecology, Department of Geography, University of the Aegean, University Hill, GR-81100, Mytilene, Greece
| | - Pere Pons
- Departament de Ciències Ambientals, University of Girona, Campus Montilivi, 17003, Girona, Catalonia, Spain
| | - Simon G Potts
- Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Earley Gate, Reading, RG6 6AR, UK
| | - Irina B Rapoport
- Tembotov Institute of Ecology of Mountain Territories, Russian Academy of Sciences, I. Armand, 37a, Nalchik, Russia
| | - Paul R Rhoades
- Idaho State Department of Agriculture, Coeur d'Alene, ID 83854, USA
| | - Clark Richter
- Science Department, Staten Island Academy, Staten Island, NY, USA
| | - Ruslan A Saifutdinov
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071, Russia
| | - Nathan J Sanders
- Department of Ecology and Evolutionary Biology, University of Michigan, 1105 North University Ave, Biological Sciences Building, Ann Arbor, MI, 48109-1085, USA
| | - Xavier Santos
- CIBIO-InBIO, Universidade do Porto, Campus de Vairão, Rua Padre Armando Quintas, 4485-661, Vairão, Portugal
| | - Zachary Steel
- Department of Environmental Science, Policy and Management, University of California, Berkeley, CA, 94720, USA
| | - Julia Tavella
- Instituto Multidisciplinario de Biología Vegetal (IMBIV), CONICET-Universidad Nacional de Córdoba, Vélez Sarsfield 1611, 5000, Córdoba, Argentina.,Facultad de Agronomía, Cátedra de Botánica General, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Clara Wendenburg
- Departament de Ciències Ambientals, University of Girona, Campus Montilivi, 17003, Girona, Catalonia, Spain
| | - Beat Wermelinger
- Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Forest Health and Biotic Interactions-Forest Entomology, Zürcherstrasse 111, CH-8903, Birmensdorf, Switzerland
| | - Andrey S Zaitsev
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071, Russia
| | - Simon Thorn
- Field Station Fabrikschleichach, Department of Animal Ecology and Tropical Biology (Zoology III), Julius Maximilians University Würzburg, Glashüttenstraße 5, 96181, Rauhenebrach, Germany.,Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 1160/31, 37005, České Budějovice, Czech Republic
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10
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Delphia CM, O'Neill KM, Burkle LA. Proximity to wildflower strips did not boost crop pollination on small, diversified farms harboring diverse wild bees. Basic Appl Ecol 2022. [DOI: 10.1016/j.baae.2022.03.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Slominski AH, Burkle LA. Asynchrony between solitary bee emergence and flower availability reduces flower visitation rate and may affect offspring size. Basic Appl Ecol 2021. [DOI: 10.1016/j.baae.2021.08.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Rodger JG, Bennett JM, Razanajatovo M, Knight TM, van Kleunen M, Ashman TL, Steets JA, Hui C, Arceo-Gómez G, Burd M, Burkle LA, Burns JH, Durka W, Freitas L, Kemp JE, Li J, Pauw A, Vamosi JC, Wolowski M, Xia J, Ellis AG. Widespread vulnerability of flowering plant seed production to pollinator declines. Sci Adv 2021; 7:eabd3524. [PMID: 34644118 PMCID: PMC8514087 DOI: 10.1126/sciadv.abd3524] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Despite evidence of pollinator declines from many regions across the globe, the threat this poses to plant populations is not clear because plants can often produce seeds without animal pollinators. Here, we quantify pollinator contribution to seed production by comparing fertility in the presence versus the absence of pollinators for a global dataset of 1174 plant species. We estimate that, without pollinators, a third of flowering plant species would produce no seeds and half would suffer an 80% or more reduction in fertility. Pollinator contribution to plant reproduction is higher in plants with tree growth form, multiple reproductive episodes, more specialized pollination systems, and tropical distributions, making these groups especially vulnerable to reduced service from pollinators. These results suggest that, without mitigating efforts, pollinator declines have the potential to reduce reproduction for most plant species, increasing the risk of population declines.
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Affiliation(s)
- James G. Rodger
- Department of Botany and Zoology, Stellenbosch University, Matieland 7602, South Africa
- Biodiversity Informatics Unit, Department of Mathematical Sciences, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
- Department of Ecology and Genetics, Uppsala University, Uppsala, Sweden
- Corresponding author.
| | - Joanne M. Bennett
- Institute of Biology, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle (Saale), Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstraße 4, 04103 Leipzig, Germany
- Centre for Applied Water Science, Institute for Applied Ecology, Faculty of Science and Technology, University of Canberra, Canberra, ACT, Australia
| | - Mialy Razanajatovo
- Ecology, Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
| | - Tiffany M. Knight
- Institute of Biology, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle (Saale), Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstraße 4, 04103 Leipzig, Germany
- Department of Community Ecology, Helmholtz Centre for Environmental Research—UFZ, Theodor-Lieser-Straße 4, 06120 Halle (Saale), Germany
| | - Mark van Kleunen
- Ecology, Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou 318000, China
| | - Tia-Lynn Ashman
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh PA 15260, USA
| | - Janette A. Steets
- Department of Plant Biology, Ecology and Evolution, Oklahoma State University, Stillwater, OK 74078, USA
- Illumination Works, 2689 Commons Blvd., Suite 120, Beavercreek, OH 45431, USA
| | - Cang Hui
- Centre for Invasion Biology, Department of Mathematical Sciences, Stellenbosch University, Matieland 7602, South Africa
- Biodiversity Informatics Unit, African Institute for Mathematical Sciences, Cape Town 7945, South Africa
- International Initiative for Theoretical Ecology, Unit 10, 317 Essex Road, London N1 2EE, UK
| | - Gerardo Arceo-Gómez
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN 37614, USA
| | - Martin Burd
- School of Biological Sciences, Monash University, Melbourne, VIC, Australia
| | - Laura A. Burkle
- Department of Ecology, Montana State University, Bozeman, MT 59717, USA
| | - Jean H. Burns
- Department of Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Walter Durka
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstraße 4, 04103 Leipzig, Germany
- Department of Community Ecology, Helmholtz Centre for Environmental Research—UFZ, Theodor-Lieser-Straße 4, 06120 Halle (Saale), Germany
| | | | - Jurene E. Kemp
- Department of Botany and Zoology, Stellenbosch University, Matieland 7602, South Africa
| | - Junmin Li
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou 318000, China
| | - Anton Pauw
- Department of Botany and Zoology, Stellenbosch University, Matieland 7602, South Africa
| | - Jana C. Vamosi
- Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Marina Wolowski
- Institute of Natural Sciences, Federal University of Alfenas, Alfenas, Brazil
| | - Jing Xia
- College of Life Sciences, South-Central University for Nationalities, Wuhan, Hubei, China
| | - Allan G. Ellis
- Department of Botany and Zoology, Stellenbosch University, Matieland 7602, South Africa
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13
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Burkle LA, Heil LJ, Belote RT. Salvage logging management affects species' roles in connecting plant–pollinator interaction networks across post‐wildfire landscapes. J Appl Ecol 2021. [DOI: 10.1111/1365-2664.13928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Laura A. Burkle
- Department of Ecology Montana State University Bozeman MT USA
| | - Laura J. Heil
- Department of Ecology Montana State University Bozeman MT USA
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14
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Albertson LK, MacDonald MJ, Tumolo BB, Briggs MA, Maguire Z, Quinn S, Sanchez-Ruiz JA, Veneros J, Burkle LA. Uncovering patterns of freshwater positive interactions using meta-analysis: Identifying the roles of common participants, invasive species and environmental context. Ecol Lett 2020; 24:594-607. [PMID: 33368953 DOI: 10.1111/ele.13664] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 11/20/2020] [Accepted: 11/28/2020] [Indexed: 01/20/2023]
Abstract
Positive interactions are sensitive to human activities, necessitating synthetic approaches to elucidate broad patterns and predict future changes if these interactions are altered or lost. General understanding of freshwater positive interactions has been far outpaced by knowledge of these important relationships in terrestrial and marine ecosystems. We conducted a global meta-analysis to evaluate the magnitude of positive interactions across freshwater habitats. In 340 studies, we found substantial positive effects, with facilitators increasing beneficiaries by, on average, 81% across all taxa and response variables. Mollusks in particular were commonly studied as both facilitators and beneficiaries. Amphibians were one group benefiting the most from positive interactions, yet few studies investigated amphibians. Invasive facilitators had stronger positive effects on beneficiaries than non-invasive facilitators. We compared positive effects between high- and low-stress conditions and found no difference in the magnitude of benefit in the subset of studies that manipulated stressors. Future areas of research include understudied facilitators and beneficiaries, the stress gradient hypothesis, patterns across space or time and the influence of declining taxa whose elimination would jeopardise fragile positive interaction networks. Freshwater positive interactions occur among a wide range of taxa, influence populations, communities and ecosystem processes and deserve further exploration.
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Affiliation(s)
- Lindsey K Albertson
- Department of Ecology, Montana State University, P.O. Box 173460, Bozeman, MT, 59717, USA
| | - Michael J MacDonald
- Department of Ecology, Montana State University, P.O. Box 173460, Bozeman, MT, 59717, USA
| | - Benjamin B Tumolo
- Department of Ecology, Montana State University, P.O. Box 173460, Bozeman, MT, 59717, USA
| | - Michelle A Briggs
- Department of Ecology, Montana State University, P.O. Box 173460, Bozeman, MT, 59717, USA
| | - Zachary Maguire
- Department of Ecology, Montana State University, P.O. Box 173460, Bozeman, MT, 59717, USA
| | - Sierra Quinn
- Department of Ecology, Montana State University, P.O. Box 173460, Bozeman, MT, 59717, USA
| | - Jose A Sanchez-Ruiz
- Department of Ecology, Montana State University, P.O. Box 173460, Bozeman, MT, 59717, USA
| | - Jaris Veneros
- Department of Ecology, Montana State University, P.O. Box 173460, Bozeman, MT, 59717, USA
| | - Laura A Burkle
- Department of Ecology, Montana State University, P.O. Box 173460, Bozeman, MT, 59717, USA
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15
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CaraDonna PJ, Burkle LA, Schwarz B, Resasco J, Knight TM, Benadi G, Blüthgen N, Dormann CF, Fang Q, Fründ J, Gauzens B, Kaiser-Bunbury CN, Winfree R, Vázquez DP. Seeing through the static: the temporal dimension of plant-animal mutualistic interactions. Ecol Lett 2020; 24:149-161. [PMID: 33073900 DOI: 10.1111/ele.13623] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 08/24/2020] [Accepted: 09/17/2020] [Indexed: 12/22/2022]
Abstract
Most studies of plant-animal mutualistic networks have come from a temporally static perspective. This approach has revealed general patterns in network structure, but limits our ability to understand the ecological and evolutionary processes that shape these networks and to predict the consequences of natural and human-driven disturbance on species interactions. We review the growing literature on temporal dynamics of plant-animal mutualistic networks including pollination, seed dispersal and ant defence mutualisms. We then discuss potential mechanisms underlying such variation in interactions, ranging from behavioural and physiological processes at the finest temporal scales to ecological and evolutionary processes at the broadest. We find that at the finest temporal scales (days, weeks, months) mutualistic interactions are highly dynamic, with considerable variation in network structure. At intermediate scales (years, decades), networks still exhibit high levels of temporal variation, but such variation appears to influence network properties only weakly. At the broadest temporal scales (many decades, centuries and beyond), continued shifts in interactions appear to reshape network structure, leading to dramatic community changes, including loss of species and function. Our review highlights the importance of considering the temporal dimension for understanding the ecology and evolution of complex webs of mutualistic interactions.
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Affiliation(s)
- Paul J CaraDonna
- Chicago Botanic Garden, 1000 Lake Cook Road, Glencoe, IL, 60647, USA
- Rocky Mountain Biological Laboratory, P.O. Box 519, Crested Butte, CO, 81224, USA
- Plant Biology and Conservation, Northwestern University, Evanston, IL, 60208, USA
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT, 59717, USA
| | - Benjamin Schwarz
- Biometry and Environmental System Analysis, Albert-Ludwigs-Universität Freiburg, Tennenbacherstr. 4, Freiburg im Breisgau, 79106, Germany
| | - Julian Resasco
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, 80309, USA
| | - Tiffany M Knight
- Institute of Biology, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, Halle (Saale), 06108, Germany
- Department of Community Ecology, Helmholtz Centre for Environmental Research-UFZ, Theodor-Lieser-Straße 4, Halle (Saale), 06120, Germany
- German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, 04103, Germany
| | - Gita Benadi
- Biometry and Environmental System Analysis, Albert-Ludwigs-Universität Freiburg, Tennenbacherstr. 4, Freiburg im Breisgau, 79106, Germany
| | - Nico Blüthgen
- Ecological Networks, Department of Biology, Technische Universität Darmstadt, Schnittspahnstr. 3, Darmstadt, 64287, Germany
| | - Carsten F Dormann
- Biometry and Environmental System Analysis, Albert-Ludwigs-Universität Freiburg, Tennenbacherstr. 4, Freiburg im Breisgau, 79106, Germany
- Freiburg Institute for Advanced Studies, Universität Freiburg, Freiburg im Breisgau, 79104, Germany
| | - Qiang Fang
- College of Agriculture, Henan University of Science and Technology, Luoyang, 471003, China
| | - Jochen Fründ
- Biometry and Environmental System Analysis, Albert-Ludwigs-Universität Freiburg, Tennenbacherstr. 4, Freiburg im Breisgau, 79106, Germany
| | - Benoit Gauzens
- German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, 04103, Germany
- Institute of Biodiversity, Friedrich Schiller University Jena, Jena, Germany
| | - Christopher N Kaiser-Bunbury
- Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Cornwall Campus, Penryn, TR10 9FE, UK
| | - Rachael Winfree
- Department of Ecology, Evolution, and Natural Resources, Rutgers University, 14 College Farm Rd, New Brunswick, NJ, 08901, USA
| | - Diego P Vázquez
- Freiburg Institute for Advanced Studies, Universität Freiburg, Freiburg im Breisgau, 79104, Germany
- Argentine Institute for Dryland Research, CONICET, National University of Cuyo, Av. Ruiz Leal s/n, Mendoza, 5500, Argentina
- Faculty of Exact and Natural Sciences, National University of Cuyo, Padre Jorge Contreras 1300, Mendoza, M5502JMA, Argentina
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16
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Schwarz B, Vázquez DP, CaraDonna PJ, Knight TM, Benadi G, Dormann CF, Gauzens B, Motivans E, Resasco J, Blüthgen N, Burkle LA, Fang Q, Kaiser‐Bunbury CN, Alarcón R, Bain JA, Chacoff NP, Huang S, LeBuhn G, MacLeod M, Petanidou T, Rasmussen C, Simanonok MP, Thompson AH, Fründ J. Temporal scale‐dependence of plant–pollinator networks. OIKOS 2020. [DOI: 10.1111/oik.07303] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Benjamin Schwarz
- Biometry and Environmental System Analysis, Univ. of Freiburg Tennenbacher Str. 4 DE‐79106 Freiburg Germany
| | - Diego P. Vázquez
- Argentine Inst. for Dryland Research, CONICET Mendoza Argentina
- Faculty of Exact and Natural Sciences, National Univ. of Cuyo Mendoza Argentina
| | - Paul J. CaraDonna
- Chicago Botanic Garden Glencoe IL USA
- Rocky Mountain Biological Laboratory Crested Butte CO USA
| | - Tiffany M. Knight
- German Centre for Integrative Biodiversity Research (iDiv), Halle‐Jena‐Leipzig Leipzig Germany
- Dept Community Ecology, Helmholtz Centre for Environmental Research – UFZ Halle Germany
- Inst. of Biology, Martin Luther Univ. Halle‐Wittenberg Halle Germany
| | - Gita Benadi
- Biometry and Environmental System Analysis, Univ. of Freiburg Tennenbacher Str. 4 DE‐79106 Freiburg Germany
| | - Carsten F. Dormann
- Biometry and Environmental System Analysis, Univ. of Freiburg Tennenbacher Str. 4 DE‐79106 Freiburg Germany
- Freiburg Inst. for Advanced Studies, Univ. of Freiburg Freiburg im Breisgau Germany
| | - Benoit Gauzens
- German Centre for Integrative Biodiversity Research (iDiv), Halle‐Jena‐Leipzig Leipzig Germany
- Inst. of Biodiversity, Friedrich Schiller Univ. Jena Jena Germany
| | - Elena Motivans
- German Centre for Integrative Biodiversity Research (iDiv), Halle‐Jena‐Leipzig Leipzig Germany
- Dept Community Ecology, Helmholtz Centre for Environmental Research – UFZ Halle Germany
| | - Julian Resasco
- Dept of Ecology and Evolutionary Biology, Univ. of Colorado Boulder CO USA
| | - Nico Blüthgen
- Dept of Biology, Technische Univ. Darmstadt Darmstadt Germany
| | | | - Qiang Fang
- College of Agriculture, Henan Univ. of Science and Technology Luoyang PR China
| | | | - Ruben Alarcón
- Dept of Biology, California State Univ. Channel Islands Camarillo CA USA
| | - Justin A. Bain
- Chicago Botanic Garden Glencoe IL USA
- Rocky Mountain Biological Laboratory Crested Butte CO USA
- Plant Biology and Conservation Program, Northwestern Univ. Evanston IL USA
| | - Natacha P. Chacoff
- Inst. de Ecología Regional (IER), Univ. Nacional de Tucumán (UNT)‐Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Tucumán Argentina
- Facultad de Ciencias Naturales e Instituto Miguel Lillo, Univ. Nacional de Tucumán (UNT) Tucumán Argentina
| | - Shuang‐Quan Huang
- Inst. of Evolution and Ecology, School of Life Sciences, Central China Normal Univ. Wuhan PR China
| | - Gretchen LeBuhn
- Dept of Biology, San Francisco State Univ. San Francisco CA USA
| | - Molly MacLeod
- Dept of Ecology, Evolution, and Natural Resources, Rutgers Univ. New Brunswick NJ USA
| | - Theodora Petanidou
- Laboratory of Biogeography and Ecology, Dept of Geography, Univ. of the Aegean Mytilene Greece
| | | | - Michael P. Simanonok
- Dept of Ecology, Montana State Univ. Bozeman MT USA
- Northern Prairie Wildlife Research Center, US Geological Survey Jamestown ND USA
| | - Amibeth H. Thompson
- German Centre for Integrative Biodiversity Research (iDiv), Halle‐Jena‐Leipzig Leipzig Germany
- Inst. of Biology, Martin Luther Univ. Halle‐Wittenberg Halle Germany
| | - Jochen Fründ
- Biometry and Environmental System Analysis, Univ. of Freiburg Tennenbacher Str. 4 DE‐79106 Freiburg Germany
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17
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Pires MM, O'Donnell JL, Burkle LA, Díaz‐Castelazo C, Hembry DH, Yeakel JD, Newman EA, Medeiros LP, Aguiar MAM, Guimarães PR. The indirect paths to cascading effects of extinctions in mutualistic networks. Ecology 2020; 101:e03080. [DOI: 10.1002/ecy.3080] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 04/07/2020] [Accepted: 04/14/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Mathias M. Pires
- Departamento de Biologia Animal Instituto de Biologia Universidade Estadual de Campinas Campinas 13.083-862 São Paulo Brazil
| | - James L. O'Donnell
- School of Marine and Environmental Affairs University of Washington Seattle WA 98105 Washington USA
| | - Laura A. Burkle
- Department of Ecology Montana State University Bozeman MT 59717 Montana USA
| | - Cecilia Díaz‐Castelazo
- Red de Interacciones Multitróficas Instituto de Ecología, A.C. Xalapa VER 11 351 Veracruz México
| | - David H. Hembry
- Department of Entomology Cornell University Ithaca NY 14853 New York USA
- Department of Ecology and Evolutionary Biology University of Arizona Tucson AZ 85721 Arizona USA
| | - Justin D. Yeakel
- School of Natural Sciences University of California Merced CA 95343 California USA
| | - Erica A. Newman
- Department of Ecology and Evolutionary Biology University of Arizona Tucson AZ 85721 Arizona USA
| | - Lucas P. Medeiros
- Department of Civil and Environmental Engineering MIT Cambridge MA 02142 Massachusetts USA
| | - Marcus A. M. Aguiar
- Instituto de Física “Gleb Wataghin” Universidade Estadual de Campinas Campinas 13083-859 São Paulo Brazil
| | - Paulo R. Guimarães
- Departamento de Ecologia Instituto de Biociências Universidade de São Paulo São Paulo 05508-090 Brazil
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18
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Simanonok MP, Burkle LA. High-severity wildfire limits available floral pollen quality and bumble bee nutrition compared to mixed-severity burns. Oecologia 2019; 192:489-499. [PMID: 31844986 DOI: 10.1007/s00442-019-04577-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 12/05/2019] [Indexed: 11/30/2022]
Abstract
High-severity wildfires, which can homogenize floral communities, are becoming more common relative to historic mixed-severity fire regimes in the Northern Rockies of the U.S. High-severity wildfire could negatively affect bumble bees, which are typically diet generalists, if floral species of inadequate pollen quality dominate the landscape post-burn. High-severity wildfires often require more time to return to pre-burn vegetation composition, and thus, effects of high-severity burns may persist past initial impacts. We investigated how wildfire severity (mixed- vs. high-severity) and time-since-burn affected available floral pollen quality, corbicular pollen quality, and bumble bee nutrition using percent nitrogen as a proxy for pollen quality and bumble bee nutrition. We found that community-weighted mean floral pollen nitrogen, corbicular pollen nitrogen, and bumble bee nitrogen were greater on average by 0.82%N, 0.60%N, and 1.16%N, respectively, in mixed-severity burns. This pattern of enhanced floral pollen nitrogen in mixed-severity burns was likely driven by the floral community, as community-weighted mean floral pollen percent nitrogen explained 87.4% of deviance in floral community composition. Only bee percent nitrogen varied with time-since-burn, increasing by 0.33%N per year. If these patterns persist across systems, our findings suggest that although wildfire is an essential ecosystem process, there are negative early successional impacts of high-severity wildfires on bumble bees and potentially on other pollen-dependent organisms via reductions in available pollen quality and nutrition. This work examines a previously unexplored pathway for how disturbances can influence native bee success via altering the nutritional landscape of pollen.
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Affiliation(s)
- Michael P Simanonok
- Department of Ecology, Montana State University, Bozeman, MT, USA. .,U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, USA.
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT, USA
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Delphia CM, O'Neill KM, Burkle LA. Wildflower Seed Sales as Incentive for Adopting Flower Strips for Native Bee Conservation: A Cost-Benefit Analysis. J Econ Entomol 2019; 112:2534-2544. [PMID: 31318028 DOI: 10.1093/jee/toz191] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Indexed: 06/10/2023]
Abstract
Improving pollinator habitat on farmlands is needed to further wild bee conservation and to sustain crop pollination in light of relationships between global declines in pollinators and reductions in floral resources. One management strategy gaining much attention is the use of wildflower strips planted alongside crops to provide supplemental floral resources for pollinators. However, farmer adoption of pollinator-friendly strategies has been minimal, likely due to uncertainty about costs and benefits of providing non-crop flowering plants for bees. Over 3 yr, on four diversified farms in Montana, United States, we estimated the potential economic profit of harvesting and selling wildflower seeds collected from flower strips implemented for wild bee conservation, as an incentive for farmers to adopt this management practice. We compared the potential profitability of selling small retail seed packets versus bulk wholesale seed. Our economic analyses indicated that potential revenue from retail seed sales exceeded the costs associated with establishing and maintaining wildflower strips after the second growing season. A wholesale approach, in contrast, resulted in considerable net economic losses. We provide proof-of-concept that, under retail scenarios, the sale of native wildflower seeds may provide an alternative economic benefit that, to our knowledge, remains unexplored. The retail seed-sales approach could encourage greater farmer adoption of wildflower strips as a pollinator-conservation strategy in agroecosystems. The approach could also fill a need for regionally produced, native wildflower seed for habitat restoration and landscaping aimed at conserving native plants and pollinators.
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Affiliation(s)
- Casey M Delphia
- Department of Ecology, Montana State University, Bozeman, MT
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT
| | - Kevin M O'Neill
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT
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20
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Simanonok MP, Burkle LA. Nesting success of wood-cavity-nesting bees declines with increasing time since wildfire. Ecol Evol 2019; 9:12436-12445. [PMID: 31788188 PMCID: PMC6875575 DOI: 10.1002/ece3.5657] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 07/31/2019] [Accepted: 08/07/2019] [Indexed: 01/27/2023] Open
Abstract
Bees require distinct foraging and nesting resources to occur in close proximity. However, spatial and temporal patterns in the availability and quantity of these resources can be affected by disturbances like wildfire. The potential for spatial or temporal separation of foraging and nesting resources is of particular concern for solitary wood-cavity-nesting bees as they are central-place, short-distance foragers once they have established their nest. Often the importance of nesting resources for bees have been tested by sampling foraging bees as a proxy, and nesting bees have rarely been studied in a community context, particularly postdisturbance. We tested how wood-cavity-nesting bee species richness, nesting success, and nesting and floral resources varied across gradients of wildfire severity and time-since-burn. We sampled nesting bees via nesting boxes within four wildfires in southwest Montana, USA, using a space-for-time substitution chronosequence approach spanning 3-25 years postburn and including an unburned control. We found that bee nesting success and species richness declined with increasing time postburn, with a complete lack of successful bee nesting in unburned areas. Nesting and floral resources were highly variable across both burn severity and time-since-burn, yet generally did not have strong effects on nesting success. Our results together suggest that burned areas may provide important habitat for wood-cavity-nesting bees in this system. Given ongoing fire regime shifts as well as other threats facing wild bee communities, this work helps provide essential information necessary for the management and conservation of wood-cavity-nesting bees.
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21
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de Aguiar MAM, Newman EA, Pires MM, Yeakel JD, Boettiger C, Burkle LA, Gravel D, Guimarães PR, O'Donnell JL, Poisot T, Fortin MJ, Hembry DH. Revealing biases in the sampling of ecological interaction networks. PeerJ 2019; 7:e7566. [PMID: 31534845 PMCID: PMC6727833 DOI: 10.7717/peerj.7566] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 07/29/2019] [Indexed: 11/20/2022] Open
Abstract
The structure of ecological interactions is commonly understood through analyses of interaction networks. However, these analyses may be sensitive to sampling biases with respect to both the interactors (the nodes of the network) and interactions (the links between nodes), because the detectability of species and their interactions is highly heterogeneous. These ecological and statistical issues directly affect ecologists’ abilities to accurately construct ecological networks. However, statistical biases introduced by sampling are difficult to quantify in the absence of full knowledge of the underlying ecological network’s structure. To explore properties of large-scale ecological networks, we developed the software EcoNetGen, which constructs and samples networks with predetermined topologies. These networks may represent a wide variety of communities that vary in size and types of ecological interactions. We sampled these networks with different mathematical sampling designs that correspond to methods used in field observations. The observed networks generated by each sampling process were then analyzed with respect to the number of components, size of components and other network metrics. We show that the sampling effort needed to estimate underlying network properties depends strongly both on the sampling design and on the underlying network topology. In particular, networks with random or scale-free modules require more complete sampling to reveal their structure, compared to networks whose modules are nested or bipartite. Overall, modules with nested structure were the easiest to detect, regardless of the sampling design used. Sampling a network starting with any species that had a high degree (e.g., abundant generalist species) was consistently found to be the most accurate strategy to estimate network structure. Because high-degree species tend to be generalists, abundant in natural communities relative to specialists, and connected to each other, sampling by degree may therefore be common but unintentional in empirical sampling of networks. Conversely, sampling according to module (representing different interaction types or taxa) results in a rather complete view of certain modules, but fails to provide a complete picture of the underlying network. To reduce biases introduced by sampling methods, we recommend that these findings be incorporated into field design considerations for projects aiming to characterize large species interaction networks.
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Affiliation(s)
- Marcus A M de Aguiar
- Instituto de Física "Gleb Wataghin", Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Erica A Newman
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, USA
| | - Mathias M Pires
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Justin D Yeakel
- School of Natural Sciences, University of California, Merced, CA, USA.,Santa Fe Institute, Santa Fe, NM, USA
| | - Carl Boettiger
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, Berkeley, CA, USA
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT, USA
| | - Dominique Gravel
- Département de Biologie, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Paulo R Guimarães
- Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil
| | - James L O'Donnell
- School of Marine and Environmental Affairs, University of Washington, Seattle, WA, USA
| | - Timothée Poisot
- Département de Sciences Biologiques, Université de Montréal, Montréal, QC, Canada.,Québec Centre for Biodiversity Sciences, Montréal, QC, Canada
| | - Marie-Josée Fortin
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
| | - David H Hembry
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ, USA.,Department of Entomology, Cornell University, Ithaca, NY, USA
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Burns JH, Bennett JM, Li J, Xia J, Arceo-Gómez G, Burd M, Burkle LA, Durka W, Ellis AG, Freitas L, Rodger JG, Vamosi JC, Wolowski M, Ashman TL, Knight TM, Steets JA. Plant traits moderate pollen limitation of introduced and native plants: a phylogenetic meta-analysis of global scale. New Phytol 2019; 223:2063-2075. [PMID: 31116447 DOI: 10.1111/nph.15935] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 05/03/2019] [Indexed: 06/09/2023]
Abstract
The role of pollination in the success of invasive plants needs to be understood because invasives have substantial effects on species interactions and ecosystem functions. Previous research has shown both that reproduction of invasive plants is often pollen limited and that invasive plants can have high seed production, motivating the questions: How do invasive populations maintain reproductive success in spite of pollen limitation? What species traits moderate pollen limitation for invaders? We conducted a phylogenetic meta-analysis with 68 invasive, 50 introduced noninvasive and 1931 native plant populations, across 1249 species. We found that invasive populations with generalist pollination or pollinator dependence were less pollen limited than natives, but invasives and introduced noninvasives did not differ. Invasive species produced 3× fewer ovules/flower and >250× more flowers per plant, compared with their native relatives. While these traits were negatively correlated, consistent with a tradeoff, this did not differ with invasion status. Invasive plants that produce many flowers and have floral generalisation are able to compensate for or avoid pollen limitation, potentially helping to explain the invaders' reproductive successes.
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Affiliation(s)
- Jean H Burns
- Department of Biology, Case Western Reserve University, Cleveland, OH, 44106-7080, USA
| | - Joanne M Bennett
- Institute of Biology, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle (Saale), Germany
- German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, 04103, Germany
| | - Junmin Li
- Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou City, 318000, China
| | - Jing Xia
- College of Life Sciences, South-Central University for Nationalities, Wuhan, 430074, China
| | - Gerardo Arceo-Gómez
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37614,, USA
| | - Martin Burd
- School of Biological Sciences, Monash University, Melbourne, Victoria, 3800, Australia
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT, 59717, USA
| | - Walter Durka
- German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, 04103, Germany
- Department of Community Ecology, Helmholtz Centre for Environmental Research - UFZ, Theodor-Lieser-Straße 4, Halle (Saale), 06120, Germany
| | - Allan G Ellis
- Department of Botany and Zoology, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
| | - Leandro Freitas
- Rio de Janeiro Botanical Garden, Rio de Janeiro, 22460-030, Brazil
| | - James G Rodger
- Department of Botany and Zoology, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa
- Department of Plant Ecology and Evolution, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18 D, Uppsala, SE-752 36, Sweden
| | - Jana C Vamosi
- Department of Biological Sciences, University of Calgary, Calgary, AB, T2N1N4, Canada
| | - Marina Wolowski
- Institute of Natural Sciences, Federal University of Alfenas, Alfenas, Minas Gerais, 37130-001, Brazil
| | - Tia-Lynn Ashman
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA, 15217, USA
| | - Tiffany M Knight
- Institute of Biology, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle (Saale), Germany
- German Centre for Integrative Biodiversity Research (iDiv), Halle-Jena-Leipzig, Deutscher Platz 5e, Leipzig, 04103, Germany
- Department of Community Ecology, Helmholtz Centre for Environmental Research - UFZ, Theodor-Lieser-Straße 4, Halle (Saale), 06120, Germany
| | - Janette A Steets
- Department of Plant Biology, Ecology and Evolution, Oklahoma State University, Stillwater, OK, 74078, USA
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Slominski AH, Burkle LA. Solitary Bee Life History Traits and Sex Mediate Responses to Manipulated Seasonal Temperatures and Season Length. Front Ecol Evol 2019. [DOI: 10.3389/fevo.2019.00314] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Affiliation(s)
- Laura A. Burkle
- Department of Ecology Montana State University Bozeman Montana
| | - Justin B. Runyon
- Rocky Mountain Research Station USDA Forest Service Bozeman Montana
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25
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Adhikari S, Burkle LA, O'Neill KM, Weaver DK, Delphia CM, Menalled FD. Dryland Organic Farming Partially Offsets Negative Effects of Highly Simplified Agricultural Landscapes on Forbs, Bees, and Bee-Flower Networks. Environ Entomol 2019; 48:826-835. [PMID: 31144714 DOI: 10.1093/ee/nvz056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Indexed: 06/09/2023]
Abstract
Industrialized farming practices result in simplified agricultural landscapes, reduced biodiversity, and degraded species-interaction networks. Thus far, most research assessing the combined effects of farming systems and landscape complexity on beneficial insects has been conducted in relatively diversified and mesic systems and may not represent the large-scale, monoculture-based dryland agriculture that dominates many regions worldwide. Specifically, the effects of farming systems on forbs, bees, and their interactions are poorly understood in highly simplified dryland landscapes such as those in the Northern Great Plains, United States, an area globally important for conventional and organic small grain, pulse, forage, and oilseed production. During a 3-yr (2013-2015) study, we assessed 1) the effects of dryland no-till conventional and tilled organic farming on forbs, bees, and bee-flower networks and 2) the relationship between natural habitat and bee abundance. Flower density and richness were greater in tilled organic fields than in no-till conventional fields, and forb community composition differed between farming systems. We observed high bee diversity (109 taxa) in this highly simplified landscape, and bee abundance, richness, and community composition were similar between systems. Compared with tilled organic fields, bee-flower interactions in no-till conventional fields were poorly connected, suggesting these systems maintain relatively impoverished plant-pollinator networks. Natural habitat (11% of the landscape) did not affect small-bodied bee abundance in either farming system but positively affected large-bodied bees within 2,000 m of crop-field centers. In highly simplified agricultural landscapes, dryland organic farming and no-till conventional farming together support relatively high bee diversity, presumably because dryland organic farming enhances floral resources and bee-flower networks, and no-till management in conventional farming provides undisturbed ground-nesting habitats for wild bees (Hymenoptera: Apoidea).
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Affiliation(s)
- Subodh Adhikari
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT
| | - Kevin M O'Neill
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT
| | - David K Weaver
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT
| | - Casey M Delphia
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT
- Department of Ecology, Montana State University, Bozeman, MT
| | - Fabian D Menalled
- Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT
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Burkle LA, Simanonok MP, Durney JS, Myers JA, Belote RT. Wildfires Influence Abundance, Diversity, and Intraspecific and Interspecific Trait Variation of Native Bees and Flowering Plants Across Burned and Unburned Landscapes. Front Ecol Evol 2019. [DOI: 10.3389/fevo.2019.00252] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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27
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Delmas E, Besson M, Brice MH, Burkle LA, Dalla Riva GV, Fortin MJ, Gravel D, Guimarães PR, Hembry DH, Newman EA, Olesen JM, Pires MM, Yeakel JD, Poisot T. Analysing ecological networks of species interactions. Biol Rev Camb Philos Soc 2019; 94:16-36. [PMID: 29923657 DOI: 10.1111/brv.12433] [Citation(s) in RCA: 180] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 05/08/2018] [Accepted: 05/14/2018] [Indexed: 01/24/2023]
Abstract
Network approaches to ecological questions have been increasingly used, particularly in recent decades. The abstraction of ecological systems - such as communities - through networks of interactions between their components indeed provides a way to summarize this information with single objects. The methodological framework derived from graph theory also provides numerous approaches and measures to analyze these objects and can offer new perspectives on established ecological theories as well as tools to address new challenges. However, prior to using these methods to test ecological hypotheses, it is necessary that we understand, adapt, and use them in ways that both allow us to deliver their full potential and account for their limitations. Here, we attempt to increase the accessibility of network approaches by providing a review of the tools that have been developed so far, with - what we believe to be - their appropriate uses and potential limitations. This is not an exhaustive review of all methods and metrics, but rather, an overview of tools that are robust, informative, and ecologically sound. After providing a brief presentation of species interaction networks and how to build them in order to summarize ecological information of different types, we then classify methods and metrics by the types of ecological questions that they can be used to answer from global to local scales, including methods for hypothesis testing and future perspectives. Specifically, we show how the organization of species interactions in a community yields different network structures (e.g., more or less dense, modular or nested), how different measures can be used to describe and quantify these emerging structures, and how to compare communities based on these differences in structures. Within networks, we illustrate metrics that can be used to describe and compare the functional and dynamic roles of species based on their position in the network and the organization of their interactions as well as associated new methods to test the significance of these results. Lastly, we describe potential fruitful avenues for new methodological developments to address novel ecological questions.
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Affiliation(s)
- Eva Delmas
- Département de Sciences Biologiques, Université de Montréal, Montréal, H2V 2J7, Canada.,Québec Centre for Biodiversity Sciences, McGill University, Montréal, H3A 1B1, Canada
| | - Mathilde Besson
- Département de Sciences Biologiques, Université de Montréal, Montréal, H2V 2J7, Canada.,Québec Centre for Biodiversity Sciences, McGill University, Montréal, H3A 1B1, Canada
| | - Marie-Hélène Brice
- Département de Sciences Biologiques, Université de Montréal, Montréal, H2V 2J7, Canada.,Québec Centre for Biodiversity Sciences, McGill University, Montréal, H3A 1B1, Canada
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT 59715, U.S.A
| | - Giulio V Dalla Riva
- Beaty Biodiversity Research Centre, University of British Columbia, Vancouver, V6T 1Z4, Canada
| | - Marie-Josée Fortin
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, M5S 3B2, Canada
| | - Dominique Gravel
- Québec Centre for Biodiversity Sciences, McGill University, Montréal, H3A 1B1, Canada.,Département de Biologie, Université de Sherbrooke, Sherbrooke, J1K 2R1, Canada
| | - Paulo R Guimarães
- Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, 05508-090, Brazil
| | - David H Hembry
- Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721, U.S.A
| | - Erica A Newman
- School of Natural Resources and Environment, University of Arizona, Tucson, AZ 85721, U.S.A.,Pacific Wildland Fire Sciences Laboratory, USDA Forest Service, Seattle, WA 98103, U.S.A
| | - Jens M Olesen
- Department of Bioscience, Aarhus University, Aarhus, 8000, Denmark
| | - Mathias M Pires
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, 13083-862, Brazil
| | - Justin D Yeakel
- Life & Environmental Sciences, University of California Merced, Merced, CA 95343, U.S.A.,Santa Fe Institute, Santa Fe, NM 87501, U.S.A
| | - Timothée Poisot
- Département de Sciences Biologiques, Université de Montréal, Montréal, H2V 2J7, Canada.,Québec Centre for Biodiversity Sciences, McGill University, Montréal, H3A 1B1, Canada
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Delphia CM, Griswold T, Reese EG, O'Neill KM, Burkle LA. Checklist of bees (Hymenoptera: Apoidea) from small diversified vegetable farms in south-western Montana. Biodivers Data J 2019; 7:e30062. [PMID: 30728742 PMCID: PMC6361878 DOI: 10.3897/bdj.7.e30062] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 12/21/2018] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Over three years (2013-2015), we sampled bees using nets and bowl traps on four diversified vegetable farms in Gallatin County, Montana, USA, as part of a study evaluating the use of wildflower strips for supporting wild bees and crop pollination services on farmlands (Delphia et al. In prep). We document 202 species and morphospecies from 32 genera within five families, of which 25 species represent the first published state records for Montana. This study increases our overall understanding of the distribution of wild bee species associated with agroecosystems of the northern US Rockies, which is important for efforts aimed at conserving bee biodiversity and supporting sustainable crop pollination systems on farmlands. NEW INFORMATION We provide a species list of wild bees associated with diversified farmlands in Montana and increase the number of published bee species records in the state from 374 to at least 399. The list includes new distributional records for 25 wild bee species, including two species that represent considerable expansions of their known ranges, Lasioglossum (Dialictus) clematisellum (Cockerell 1904) with previously published records from New Mexico, Arizona, California and Utah and Melissodes (Eumelissodes) niveus Robertson 1895 which was reported to range from New York to Minnesota and Kansas, south to North Carolina, Alabama and Mississippi.
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Affiliation(s)
- Casey M. Delphia
- Departments of Ecology and Land Resources & Environmental Sciences, Montana State University, Bozeman, United States of AmericaDepartments of Ecology and Land Resources & Environmental Sciences, Montana State UniversityBozemanUnited States of America
| | - Terry Griswold
- USDA-ARS Pollinating Insects Research Unit, Logan, United States of AmericaUSDA-ARS Pollinating Insects Research UnitLoganUnited States of America
| | - Elizabeth G. Reese
- Department of Ecology, Montana State University, Bozeman, United States of AmericaDepartment of Ecology, Montana State UniversityBozemanUnited States of America
| | - Kevin M. O'Neill
- Department of Land Resources & Environmental Sciences, Montana State University, Bozeman, United States of AmericaDepartment of Land Resources & Environmental Sciences, Montana State UniversityBozemanUnited States of America
| | - Laura A. Burkle
- Department of Ecology, Montana State University, Bozeman, United States of AmericaDepartment of Ecology, Montana State UniversityBozemanUnited States of America
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Glenny WR, Runyon JB, Burkle LA. Drought and increased CO 2 alter floral visual and olfactory traits with context-dependent effects on pollinator visitation. New Phytol 2018; 220:785-798. [PMID: 29575008 DOI: 10.1111/nph.15081] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 02/05/2018] [Indexed: 05/10/2023]
Abstract
Climate change can alter species interactions essential for maintaining biodiversity and ecosystem function, such as pollination. Understanding the interactive effects of multiple abiotic conditions on floral traits and pollinator visitation are important to anticipate the implications of climate change on pollinator services. Floral visual and olfactory traits were measured from individuals of four forb species subjected to drought or normal water availability, and elevated or ambient concentrations of CO2 in a factorial design. Pollinator visitation rates and community composition were observed in single-species and multi-species forb assemblages. Drought decreased floral visual traits and pollinator visitation rates but increased volatile organic compound (VOC) emissions, whereas elevated CO2 positively affected floral visual traits, VOC emissions and pollinator visitation rates. There was little evidence of interactive effects of drought and CO2 on floral traits and pollinator visitation. Interestingly, the effects of climate treatments on pollinator visitation depended on whether plants were in single- or multi-species assemblages. Components of climate change altered floral traits and pollinator visitation, but effects were modulated by plant community context. Investigating the response of floral traits, including VOCs, and context-dependency of pollinator attraction provides additional insights and may aid in understanding the overall effects of climate change on plant-pollinator interactions.
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Affiliation(s)
- William R Glenny
- Department of Ecology, Montana State University, Bozeman, MT, 59717, USA
| | - Justin B Runyon
- Rocky Mountain Research Station, USDA Forest Service, Bozeman, MT, 59717, USA
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT, 59717, USA
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Reese EG, Burkle LA, Delphia CM, Griswold T. A list of bees from three locations in the Northern Rockies Ecoregion (NRE) of western Montana. Biodivers Data J 2018; 6:e27161. [PMID: 30425605 PMCID: PMC6220116 DOI: 10.3897/bdj.6.e27161] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 10/16/2018] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Wild bees that were collected in conjunction with a larger study are presented as a checklist of species for the Northern Rockies Ecoregion of Montana, USA. Over the course of four field seasons (2013-2016), 281 species and morphospecies in 32 genera and five families were collected using insect nets, and identified. This paper addresses the distinct lack of studies monitoring bee species in Montana and contributes to a basic understanding of fauna in the northern Rocky Mountains. NEW INFORMATION With this study, the number of known bee species in Montana increases by at least six species, from 366 (Kuhlman and Burrows 2017) to 372. Though literature was not reviewed for all the species on this checklist, published records in Montana revealed no listings for Andrena saccata Viereck; Anthidiellum notatum robertsoni (Cockerell); Ashmeadiella meliloti (Cockerell); Ashmeadiella pronitens (Cockerell); Colletes lutzi lutzi Timberlake; and Dioxys productus (Cresson).
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Affiliation(s)
- Elizabeth G. Reese
- Department of Ecology, Montana State University, Bozeman, United States of AmericaDepartment of Ecology, Montana State UniversityBozemanUnited States of America
| | - Laura A. Burkle
- Department of Ecology, Montana State University, Bozeman, United States of AmericaDepartment of Ecology, Montana State UniversityBozemanUnited States of America
| | - Casey M. Delphia
- Department of Ecology, Montana State University, Bozeman, United States of AmericaDepartment of Ecology, Montana State UniversityBozemanUnited States of America
| | - Terry Griswold
- USDA-ARS Pollinating Insects Research Unit, Logan, United States of AmericaUSDA-ARS Pollinating Insects Research UnitLoganUnited States of America
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Koltz AM, Burkle LA, Pressler Y, Dell JE, Vidal MC, Richards LA, Murphy SM. Global change and the importance of fire for the ecology and evolution of insects. Curr Opin Insect Sci 2018; 29:110-116. [PMID: 30551816 DOI: 10.1016/j.cois.2018.07.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 07/24/2018] [Accepted: 07/26/2018] [Indexed: 06/09/2023]
Abstract
Climate change is drastically altering global fire regimes, which may affect the structure and function of insect communities. Insect responses to fire are strongly tied to fire history, plant responses, and changes in species interactions. Many insects already possess adaptive traits to survive fire or benefit from post-fire resources, which may result in community composition shifting toward habitat and dietary generalists as well as species with high dispersal abilities. However, predicting community-level resilience of insects is inherently challenging due to the high degree of spatiotemporal and historical heterogeneity of fires, diversity of insect life histories, and potential interactions with other global change drivers. Future work should incorporate experimental approaches that specifically consider spatiotemporal variability and regional fire history in order to integrate eco-evolutionary processes in understanding insect responses to fire.
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Affiliation(s)
- Amanda M Koltz
- Department of Biology, Washington University in St. Louis, One Brookings Drive, St. Louis, MO 63130, USA.
| | - Laura A Burkle
- Department of Ecology, Montana State University, 310 Lewis Hall, Bozeman, MT 59717, USA
| | - Yamina Pressler
- Natural Resource Ecology Laboratory, Colorado State University, 1499 Campus Delivery, Fort Collins, CO 80523, USA
| | - Jane E Dell
- Department of Biology, University of Nevada, 1664 N. Virginia St., Reno, NV 89557, USA
| | - Mayra C Vidal
- Department of Biological Sciences, University of Denver, 2050 E Iliff Ave, Boettcher West, Denver, CO 80210, USA
| | - Lora A Richards
- Department of Biology, University of Nevada, 1664 N. Virginia St., Reno, NV 89557, USA
| | - Shannon M Murphy
- Department of Biological Sciences, University of Denver, 2050 E Iliff Ave, Boettcher West, Denver, CO 80210, USA.
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Jamieson MA, Burkle LA, Manson JS, Runyon JB, Trowbridge AM, Zientek J. Global change effects on plant-insect interactions: the role of phytochemistry. Curr Opin Insect Sci 2017; 23:70-80. [PMID: 29129286 DOI: 10.1016/j.cois.2017.07.009] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 06/12/2017] [Accepted: 07/19/2017] [Indexed: 05/10/2023]
Abstract
Natural and managed ecosystems are undergoing rapid environmental change due to a growing human population and associated increases in industrial and agricultural activity. Global environmental change directly and indirectly impacts insect herbivores and pollinators. In this review, we highlight recent research examining how environmental change factors affect plant chemistry and, in turn, ecological interactions among plants, herbivores, and pollinators. Recent studies reveal the complex nature of understanding global change effects on plant secondary metabolites and plant-insect interactions. Nonetheless, these studies indicate that phytochemistry mediates insect responses to environmental change. Future research on the chemical ecology of plant-insect interactions will provide critical insight into the ecological effects of climate change and other anthropogenic disturbances. We recommend greater attention to investigations examining interactive effects of multiple environmental change factors in addition to chemically mediated plant-pollinator interactions, given limited research in these areas.
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Affiliation(s)
- Mary A Jamieson
- Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA.
| | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT 59717, USA
| | - Jessamyn S Manson
- Department of Biology, University of Virginia, Charlottesville, VA 22902, USA
| | - Justin B Runyon
- Rocky Mountain Research Station, USDA Forest Service, Bozeman, MT 59717, USA
| | - Amy M Trowbridge
- Department of Land Resources & Environmental Sciences, Montana State University, Bozeman, MT 59717, USA
| | - Joseph Zientek
- Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA
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LaManna JA, Belote RT, Burkle LA, Catano CP, Myers JA. Negative density dependence mediates biodiversity-productivity relationships across scales. Nat Ecol Evol 2017; 1:1107-1115. [PMID: 29046568 DOI: 10.1038/s41559-017-0225-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 05/23/2017] [Indexed: 11/09/2022]
Abstract
Regional species diversity generally increases with primary productivity whereas local diversity-productivity relationships are highly variable. This scale-dependence of the biodiversity-productivity relationship highlights the importance of understanding the mechanisms that govern variation in species composition among local communities, which is known as β-diversity. Hypotheses to explain changes in β-diversity with productivity invoke multiple mechanisms operating at local and regional scales, but the relative importance of these mechanisms is unknown. Here we show that changes in the strength of local density-dependent interactions within and among tree species explain changes in β-diversity across a subcontinental-productivity gradient. Stronger conspecific relative to heterospecific negative density dependence in more productive regions was associated with higher local diversity, weaker habitat partitioning (less species sorting), and homogenization of community composition among sites (lower β-diversity). Regional processes associated with changes in species pools had limited effects on β-diversity. Our study suggests that systematic shifts in the strength of local interactions within and among species might generally contribute to some of the most prominent but poorly understood gradients in global biodiversity.
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Affiliation(s)
- Joseph A LaManna
- Department of Biology & Tyson Research Center, Washington University in St. Louis, St. Louis, MO, 63130, USA.
| | | | - Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT, 59717, USA
| | - Christopher P Catano
- Department of Biology & Tyson Research Center, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Jonathan A Myers
- Department of Biology & Tyson Research Center, Washington University in St. Louis, St. Louis, MO, 63130, USA
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Burkle LA, Runyon JB. The smell of environmental change: Using floral scent to explain shifts in pollinator attraction. Appl Plant Sci 2017; 5:apps1600123. [PMID: 28690928 PMCID: PMC5499301 DOI: 10.3732/apps.1600123] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 01/03/2017] [Indexed: 05/18/2023]
Abstract
As diverse environmental changes continue to influence the structure and function of plant-pollinator interactions across spatial and temporal scales, we will need to enlist numerous approaches to understand these changes. Quantitative examination of floral volatile organic compounds (VOCs) is one approach that is gaining popularity, and recent work suggests that floral VOCs hold substantial promise for better understanding and predicting the effects of environmental change on plant-pollinator interactions. Until recently, few ecologists were employing chemical approaches to investigate mechanisms by which components of environmental change may disrupt these essential mutualisms. In an attempt to make these approaches more accessible, we summarize the main field, laboratory, and statistical methods involved in capturing, quantifying, and analyzing floral VOCs in the context of changing environments. We also highlight some outstanding questions that we consider to be highly relevant to making progress in this field.
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Affiliation(s)
- Laura A. Burkle
- Department of Ecology, Montana State University, Bozeman, Montana 59717 USA
- Author for correspondence:
| | - Justin B. Runyon
- Rocky Mountain Research Station, USDA Forest Service, 1648 S. 7th Avenue, Bozeman, Montana 59717 USA
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Burkle LA, Runyon JB. Drought and leaf herbivory influence floral volatiles and pollinator attraction. Glob Chang Biol 2016; 22:1644-54. [PMID: 26546275 DOI: 10.1111/gcb.13149] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 10/11/2015] [Accepted: 10/21/2015] [Indexed: 05/10/2023]
Abstract
The effects of climate change on species interactions are poorly understood. Investigating the mechanisms by which species interactions may shift under altered environmental conditions will help form a more predictive understanding of such shifts. In particular, components of climate change have the potential to strongly influence floral volatile organic compounds (VOCs) and, in turn, plant-pollinator interactions. In this study, we experimentally manipulated drought and herbivory for four forb species to determine effects of these treatments and their interactions on (1) visual plant traits traditionally associated with pollinator attraction, (2) floral VOCs, and (3) the visitation rates and community composition of pollinators. For all forbs tested, experimental drought universally reduced flower size and floral display, but there were species-specific effects of drought on volatile emissions per flower, the composition of compounds produced, and subsequent pollinator visitation rates. Moreover, the community of pollinating visitors was influenced by drought across forb species (i.e. some pollinator species were deterred by drought while others were attracted). Together, these results indicate that VOCs may provide more nuanced information to potential floral visitors and may be relatively more important than visual traits for pollinator attraction, particularly under shifting environmental conditions.
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Affiliation(s)
- Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, MT, 59717, USA
| | - Justin B Runyon
- Rocky Mountain Research Station, USDA Forest Service, 1648 S. 7th Avenue, Bozeman, MT, 59717, USA
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Herron-Sweet CR, Lehnhoff EA, Burkle LA, Littlefield JL, Mangold JM. Temporal- and density-dependent impacts of an invasive plant on pollinators and pollination services to a native plant. Ecosphere 2016. [DOI: 10.1002/ecs2.1233] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Christina R. Herron-Sweet
- Department of Land Resources and Environmental Sciences; Montana State University; 334 Leon Johnson Hall Bozeman Montana 59717 USA
| | - Erik A. Lehnhoff
- Department of Land Resources and Environmental Sciences; Montana State University; 334 Leon Johnson Hall Bozeman Montana 59717 USA
| | - Laura A. Burkle
- Department of Ecology; Montana State University; 310 Lewis Hall Bozeman Montana 59717 USA
| | - Jeffrey L. Littlefield
- Department of Land Resources and Environmental Sciences; Montana State University; 334 Leon Johnson Hall Bozeman Montana 59717 USA
| | - Jane M. Mangold
- Department of Land Resources and Environmental Sciences; Montana State University; 334 Leon Johnson Hall Bozeman Montana 59717 USA
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Burkle LA, Myers JA, Belote RT. The beta-diversity of species interactions: Untangling the drivers of geographic variation in plant-pollinator diversity and function across scales. Am J Bot 2016; 103:118-128. [PMID: 26590380 DOI: 10.3732/ajb.1500079] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 07/06/2015] [Indexed: 06/05/2023]
Abstract
PREMISE OF THE STUDY Geographic patterns of biodiversity have long inspired interest in processes that shape the assembly, diversity, and dynamics of communities at different spatial scales. To study mechanisms of community assembly, ecologists often compare spatial variation in community composition (beta-diversity) across environmental and spatial gradients. These same patterns inspired evolutionary biologists to investigate how micro- and macro-evolutionary processes create gradients in biodiversity. Central to these perspectives are species interactions, which contribute to community assembly and geographic variation in evolutionary processes. However, studies of beta-diversity have predominantly focused on single trophic levels, resulting in gaps in our understanding of variation in species-interaction networks (interaction beta-diversity), especially at scales most relevant to evolutionary studies of geographic variation. METHODS We outline two challenges and their consequences in scaling-up studies of interaction beta-diversity from local to biogeographic scales using plant-pollinator interactions as a model system in ecology, evolution, and conservation. KEY RESULTS First, we highlight how variation in regional species pools may contribute to variation in interaction beta-diversity among biogeographic regions with dissimilar evolutionary history. Second, we highlight how pollinator behavior (host-switching) links ecological networks to geographic patterns of plant-pollinator interactions and evolutionary processes. Third, we outline key unanswered questions regarding the role of geographic variation in plant-pollinator interactions for conservation and ecosystem services (pollination) in changing environments. CONCLUSIONS We conclude that the largest advances in the burgeoning field of interaction beta-diversity will come from studies that integrate frameworks in ecology, evolution, and conservation to understand the causes and consequences of interaction beta-diversity across scales.
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Affiliation(s)
- Laura A Burkle
- Department of Ecology, Montana State University, Bozeman, Montana 59717 USA
| | - Jonathan A Myers
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri 63130 USA
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Burkle LA, Myers JA, Belote RT. Wildfire disturbance and productivity as drivers of plant species diversity across spatial scales. Ecosphere 2015. [DOI: 10.1890/es15-00438.1] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Simanonok MP, Burkle LA. Partitioning interaction turnover among alpine pollination networks: spatial, temporal, and environmental patterns. Ecosphere 2014. [DOI: 10.1890/es14-00323.1] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Chung YA, Burkle LA, Knight TM. Minimal effects of an invasive flowering shrub on the pollinator community of native forbs. PLoS One 2014; 9:e109088. [PMID: 25343718 PMCID: PMC4208741 DOI: 10.1371/journal.pone.0109088] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 09/08/2014] [Indexed: 12/05/2022] Open
Abstract
Biological invasions can strongly influence species interactions such as pollination. Most of the documented effects of exotic plant species on plant-pollinator interactions have been observational studies using single pairs of native and exotic plants, and have focused on dominant exotic plant species. We know little about how exotic plants alter interactions in entire communities of plants and pollinators, especially at low to medium invader densities. In this study, we began to address these gaps by experimentally removing the flowers of a showy invasive shrub, Rosa multiflora, and evaluating its effects on the frequency, richness, and composition of bee visitors to co-flowering native plants. We found that while R. multiflora increased plot-level richness of bee visitors to co-flowering native plant species at some sites, its presence had no significant effects on bee visitation rate, visitor richness, bee community composition, or abundance overall. In addition, we found that compared to co-flowering natives, R. multiflora was a generalist plant that primarily received visits from generalist bee species shared with native plant species. Our results suggest that exotic plants such as R. multiflora may facilitate native plant pollination in a community context by attracting a more diverse assemblage of pollinators, but have limited and idiosyncratic effects on the resident plant-pollinator network in general.
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Affiliation(s)
- Y. Anny Chung
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
- Department of Biology, Albuquerque, New Mexico, United States of America
- * E-mail:
| | - Laura A. Burkle
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
- Department of Ecology, Montana State University, Bozeman, Montana, United States of America
| | - Tiffany M. Knight
- Department of Biology, Washington University in St. Louis, St. Louis, Missouri, United States of America
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Davis SC, Burkle LA, Cross WF, Cutting KA. The effects of timing of grazing on plant and arthropod communities in high-elevation grasslands. PLoS One 2014; 9:e110460. [PMID: 25338008 PMCID: PMC4206520 DOI: 10.1371/journal.pone.0110460] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 09/03/2014] [Indexed: 11/19/2022] Open
Abstract
Livestock grazing can be used as a key management tool for maintaining healthy ecosystems. However, the effectiveness of using grazing to modify habitat for species of conservation concern depends on how the grazing regime is implemented. Timing of grazing is one grazing regime component that is less understood than grazing intensity and grazer identity, but is predicted to have important implications for plant and higher trophic level responses. We experimentally assessed how timing of cattle grazing affected plant and arthropod communities in high-elevation grasslands of southwest Montana to better evaluate its use as a tool for multi-trophic level management. We manipulated timing of grazing, with one grazing treatment beginning in mid-June and the other in mid-July, in two experiments conducted in different grassland habitat types (i.e., wet meadow and upland) in 2011 and 2012. In the upland grassland experiment, we found that both early and late grazing treatments reduced forb biomass, whereas graminoid biomass was only reduced with late grazing. Grazing earlier in the growing season versus later did not result in greater recovery of graminoid or forb biomass as expected. In addition, the density of the most ubiquitous grassland arthropod order (Hemiptera) was reduced by both grazing treatments in upland grasslands. A comparison of end-of-season plant responses to grazing in upland versus wet meadow grasslands revealed that grazing reduced graminoid biomass in the wet meadow and forb biomass in the upland, irrespective of timing of grazing. Both grazing treatments also reduced end-of-season total arthropod and Hemiptera densities and Hemiptera biomass in both grassland habitat types. Our results indicate that both early and late season herbivory affect many plant and arthropod characteristics in a similar manner, but grazing earlier may negatively impact species of conservation concern requiring forage earlier in the growing season.
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Affiliation(s)
- Stacy C. Davis
- Department of Ecology, Montana State University, Bozeman, Montana, United States of America
- * E-mail:
| | - Laura A. Burkle
- Department of Ecology, Montana State University, Bozeman, Montana, United States of America
| | - Wyatt F. Cross
- Department of Ecology, Montana State University, Bozeman, Montana, United States of America
| | - Kyle A. Cutting
- Red Rock Lakes National Wildlife Refuge, US Fish and Wildlife Service, Lima, Montana, United States of America
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Burkle LA, Souza L, Genung MA, Crutsinger GM. Plant genotype, nutrients, and G × E interactions structure floral visitor communities. Ecosphere 2013. [DOI: 10.1890/es13-00039.1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Iler AM, Inouye DW, Høye TT, Miller-Rushing AJ, Burkle LA, Johnston EB. Maintenance of temporal synchrony between syrphid flies and floral resources despite differential phenological responses to climate. Glob Chang Biol 2013; 19:2348-2359. [PMID: 23640772 DOI: 10.1111/gcb.12246] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 04/23/2013] [Accepted: 04/24/2013] [Indexed: 06/02/2023]
Abstract
Variation in species' responses to abiotic phenological cues under climate change may cause changes in temporal overlap among interacting taxa, with potential demographic consequences. Here, we examine associations between the abiotic environment and plant-pollinator phenological synchrony using a long-term syrphid fly-flowering phenology dataset (1992-2011). Degree-days above freezing, precipitation, and timing of snow melt were investigated as predictors of phenology. Syrphids generally emerge after flowering onset and end their activity before the end of flowering. Neither flowering nor syrphid phenology has changed significantly over our 20-year record, consistent with a lack of directional change in climate variables over the same time frame. Instead we document interannual variability in the abiotic environment and phenology. Timing of snow melt was the best predictor of flowering onset and syrphid emergence. Snow melt and degree-days were the best predictors of the end of flowering, whereas degree-days and precipitation best predicted the end of the syrphid period. Flowering advanced at a faster rate than syrphids in response to both advancing snow melt and increasing temperature. Different rates of phenological advancements resulted in more days of temporal overlap between the flower-syrphid community in years of early snow melt because of extended activity periods. Phenological synchrony at the community level is therefore likely to be maintained for some time, even under advancing snow melt conditions that are evident over longer term records at our site. These results show that interacting taxa may respond to different phenological cues and to the same cues at different rates but still maintain phenological synchrony over a range of abiotic conditions. However, our results also indicate that some individual plant species may overlap with the syrphid community for fewer days under continued climate change. This highlights the role of interannual variation in these flower-syrphid interactions and shows that species-level responses can differ from community-level responses in nonintuitive ways.
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Affiliation(s)
- Amy M Iler
- Department of Biology, University of Maryland, College Park, MD 20742-4415, USA.
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Rafferty NE, Caradonna PJ, Burkle LA, Iler AM, Bronstein JL. Phenological overlap of interacting species in a changing climate: an assessment of available approaches. Ecol Evol 2013; 3:3183-93. [PMID: 24102003 PMCID: PMC3790560 DOI: 10.1002/ece3.668] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Revised: 05/29/2013] [Accepted: 05/31/2013] [Indexed: 01/16/2023] Open
Abstract
Concern regarding the biological effects of climate change has led to a recent surge in research to understand the consequences of phenological change for species interactions. This rapidly expanding research program is centered on three lines of inquiry: (1) how the phenological overlap of interacting species is changing, (2) why the phenological overlap of interacting species is changing, and (3) how the phenological overlap of interacting species will change under future climate scenarios. We synthesize the widely disparate approaches currently being used to investigate these questions: (1) interpretation of long-term phenological data, (2) field observations, (3) experimental manipulations, (4) simulations and nonmechanistic models, and (5) mechanistic models. We present a conceptual framework for selecting approaches that are best matched to the question of interest. We weigh the merits and limitations of each approach, survey the recent literature from diverse systems to quantify their use, and characterize the types of interactions being studied by each of them. We highlight the value of combining approaches and the importance of long-term data for establishing a baseline of phenological synchrony. Future work that scales up from pairwise species interactions to communities and ecosystems, emphasizing the use of predictive approaches, will be particularly valuable for reaching a broader understanding of the complex effects of climate change on the phenological overlap of interacting species. It will also be important to study a broader range of interactions: to date, most of the research on climate-induced phenological shifts has focused on terrestrial pairwise resource–consumer interactions, especially those between plants and insects.
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Affiliation(s)
- Nicole E Rafferty
- Department of Ecology and Evolutionary Biology, University of Arizona Tucson, Arizona, 85721 ; Center for Insect Science, University of Arizona Tucson, Arizona, 85721
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Abstract
Although ecologists have a solid understanding of the positive species-area relationship, little is known about how and why variation in habitat area influences the richness, structure, and function of species interaction networks. To address this, we investigated plant-pollinator interaction networks of the herbaceous rocky outcrop communities in Ozark glades (Missouri, USA) of different areas. We quantified the degree to which the increase in the number of species interactions with area differed from a null model based on sampling, where numbers of individuals increase with area. Although plant-pollinator interactions were expected to increase more steeply with area than species richness as a result of sampling, the observed rate of increase was considerably lower than expected. Two mechanisms could lead to this pattern: a higher proportion of specialist species in larger glades or generalist pollinators becoming more selective in their diets in larger glades. We found support for the former hypothesis, and those changes in species composition were strong enough to outweigh behavioral changes in the opposite direction; generalist pollinators were more selective in smaller glades. If these results are general, larger habitats may be needed to conserve interactions than would be thought based on species accumulation curves.
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Affiliation(s)
- Laura A Burkle
- Department of Biology, Washington University, St. Louis, Missouri 63130 USA.
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Burkle LA, Alarcón R. The future of plant-pollinator diversity: understanding interaction networks across time, space, and global change. Am J Bot 2011; 98:528-538. [PMID: 21613144 DOI: 10.3732/ajb.1000391] [Citation(s) in RCA: 160] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Structural analysis of plant-pollinator networks has revealed remarkably high species and interaction diversity and highlighted the species important for pollination services. Although techniques to analyze plant-pollinator networks began to emerge a decade ago, the characterization of spatiotemporal variation of interactions is still in its infancy. Understanding the ecological and evolutionary causes and consequences of spatial and temporal variation in plant-pollinator interactions is important for both basic and applied questions in community structure and function, the evolution of floral traits, and the development of optimal conservation strategies. Here we review observational, theoretical, and experimental studies of temporal and spatial variation in plant-pollinator interaction networks to establish a foundation for future studies to incorporate perspectives in spatiotemporal variation. Such perspectives are crucial given the rapid environmental changes associated with habitat loss, climate change, and biological invasions, which we discuss in this context. The inherent plasticity of plant-pollinator interactions and network structure suggests that many species should be able to persist by responding to environmental changes quickly, even though the identity of their mutualistic partners may change.
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Affiliation(s)
- Laura A Burkle
- Department of Biology, Washington University, St. Louis, Missouri 63130, USA.
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Burkle LA, Irwin RE, Newman DA. Predicting the effects of nectar robbing on plant reproduction: implications of pollen limitation and plant mating system. Am J Bot 2007; 94:1935-1943. [PMID: 21636388 DOI: 10.3732/ajb.94.12.1935] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The outcome of species interactions is often difficult to predict, depending on the organisms involved and the ecological context. Nectar robbers remove nectar from flowers, often without providing pollination service, and their effects on plant reproduction vary in strength and direction. In two case studies and a meta-analysis, we tested the importance of pollen limitation and plant mating system in predicting the impacts of nectar robbing on female plant reproduction. We predicted that nectar robbing would have the strongest effects on species requiring pollinators to set seed and pollen limited for seed production. Our predictions were partially supported. In the first study, natural nectar robbing was associated with lower seed production in Delphinium nuttallianum, a self-compatible but non-autogamously selfing, pollen-limited perennial, and experimental nectar robbing reduced seed set relative to unrobbed plants. The second study involved Linaria vulgaris, a self-incompatible perennial that is generally not pollen limited. Natural levels of nectar robbing generally had little effect on estimates of female reproduction in L. vulgaris, while experimental nectar robbing reduced seed set per fruit but not percentage of fruit set. A meta-analysis revealed that nectar robbing had strong negative effects on pollen-limited and self-incompatible plants, as predicted. Our results suggest that pollination biology and plant mating system must be considered to understand and predict the ecological outcome of both mutualistic and antagonistic plant-animal interactions.
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Affiliation(s)
- Laura A Burkle
- Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire 03755 USA
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Burkle LA, Logan BA. Seasonal Acclimation of Photosynthesis in Eastern Hemlock and Partridgeberry in Different Light Environments. Northeast Nat (Steuben) 2003. [DOI: 10.2307/3858668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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