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O’Neill MW, Bradley BA, Allen JM. Hotspots of invasive plant abundance are geographically distinct from hotspots of establishment. Biol Invasions 2021. [DOI: 10.1007/s10530-020-02433-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Quantitative Analysis of the Research Trends and Areas in Grassland Remote Sensing: A Scientometrics Analysis of Web of Science from 1980 to 2020. REMOTE SENSING 2021. [DOI: 10.3390/rs13071279] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Grassland remote sensing (GRS) is an important research topic that applies remote sensing technology to grassland ecosystems, reflects the number of grassland resources and grassland health promptly, and provides inversion information used in sustainable development management. A scientometrics analysis based on Science Citation Index-Expanded (SCI-E) was performed to understand the research trends and areas of focus in GRS research studies. A total of 2692 papers related to GRS research studies and 82,208 references published from 1980 to 2020 were selected as the research objects. A comprehensive overview of the field based on the annual documents, research areas, institutions, influential journals, core authors, and temporal trends in keywords were presented in this study. The results showed that the annual number of documents increased exponentially, and more than 100 papers were published each year since 2010. Remote sensing, environmental sciences, and ecology were the most popular Web of Science research areas. The journal Remote Sensing was one of the most popular for researchers to publish documents and shows high development and publishing potential in GRS research studies. The institution with the greatest research documents and most citations was the Chinese Academy of Sciences. Guo X.L., Hill M.J., and Zhang L. were the most productive authors across the 40-year study period in terms of the number of articles published. Seven clusters of research areas were identified that generated contributions to this topic by keyword co-occurrence analysis. We also detected 17 main future directions of GRS research studies by document co-citation analysis. Emerging or underutilized methodologies and technologies, such as unmanned aerial systems (UASs), cloud computing, and deep learning, will continue to further enhance GRS research in the process of achieving sustainable development goals. These results can help related researchers better understand the past and future of GRS research studies.
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Mazzolari AC, Millán EN, Bringa EM, Vázquez DP. Modeling habitat suitability and spread dynamics of two invasive rose species in protected areas of Mendoza, Argentina. ECOLOGICAL COMPLEXITY 2020. [DOI: 10.1016/j.ecocom.2020.100868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Facilitation of management plan development via spatial classification of areas invaded by alien invasive plant. Biol Invasions 2019. [DOI: 10.1007/s10530-019-01958-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Lekberg Y, Wagner V, Rummel A, McLeod M, Ramsey PW. Strong indirect herbicide effects on mycorrhizal associations through plant community shifts and secondary invasions. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2017; 27:2359-2368. [PMID: 28851018 DOI: 10.1002/eap.1613] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 07/07/2017] [Accepted: 07/18/2017] [Indexed: 06/07/2023]
Abstract
Million of acres of U.S. wildlands are sprayed with herbicides to control invasive species, but relatively little is known about non-target effects of herbicide use. We combined greenhouse, field, and laboratory experiments involving the invasive forb spotted knapweed (Centaurea stoebe) and native bunchgrasses to assess direct and indirect effects of the forb-specific herbicide picloram on arbuscular mycorrhizal fungi (AMF), which are beneficial soil fungi that colonize most plants. Picloram had no effect on bunchgrass viability and their associated AMF in the greenhouse, but killed spotted knapweed and reduced AMF colonization of a subsequent host grown. Results were similar in the field where AMF abundance in bunchgrass-dominated plots was unaffected by herbicides one year after spraying based on 16:1ω5 phospholipid fatty acid (PLFA) and neutral lipid fatty acid (NLFA) concentrations. In spotted-knapweed-dominated plots, however, picloram application shifted dominance from spotted knapweed, a good AMF host, to bulbous bluegrass (Poa bulbosa), a poor AMF host. This coincided with a 63% reduction in soil 16:1ω5 NLFA concentrations but no reduction of 16:1ω5 PLFA. Because 16:1ω5 NLFA quantifies AMF storage lipids and 16:1ω5 PLFA occurs in AMF membrane lipids, we speculate that the herbicide-mediated reduction in host quality reduced fungal carbon storage, but not necessarily fungal abundance after one year in the field. Overall, in greenhouse and field experiments, AMF were only affected when picloram altered host quantity and quality. This apparent lack of direct effect was supported by our in-vitro trial where picloram applied to AMF mycelia did not reduce fungal biomass and viability. We show that the herbicide picloram can have profound, indirect effects on AMF within one year. Depending on herbicide-mediated shifts in host quality, rapid interventions may be necessary post herbicide applications to prevent loss of AMF abundance. Future research should assess consequences of these potential shifts for the restoration of native plants that differ in mycorrhizal dependency.
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Affiliation(s)
- Ylva Lekberg
- MPG Ranch, 1001 South Higgins Avenue, Suite A3, Missoula, Montana, 59801, USA
- Department of Ecosystem and Conservation Sciences, University of Montana, Missoula, Montana, 59802, USA
| | - Viktoria Wagner
- Department of Botany and Zoology, Masaryk University, Kotlářská 2, CZ-611 37, Brno, Czech Republic
| | - Alexii Rummel
- MPG Ranch, 1001 South Higgins Avenue, Suite A3, Missoula, Montana, 59801, USA
| | - Morgan McLeod
- MPG Ranch, 1001 South Higgins Avenue, Suite A3, Missoula, Montana, 59801, USA
| | - Philip W Ramsey
- MPG Ranch, 1001 South Higgins Avenue, Suite A3, Missoula, Montana, 59801, USA
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Fick SE, Decker C, Duniway MC, Miller ME. Small‐scale barriers mitigate desertification processes and enhance plant recruitment in a degraded semiarid grassland. Ecosphere 2016. [DOI: 10.1002/ecs2.1354] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Stephen E. Fick
- Department of Plant SciencesUniversity of California Davis California 95616 USA
| | - Cheryl Decker
- National Park Service North Cascades Complex Sedro‐Woolley Washington 98284 USA
| | - Michael C. Duniway
- U.S. Geological SurveySouthwest Biological Science Center Moab Utah 84532 USA
| | - Mark E. Miller
- National Park ServiceSoutheast Utah Group Moab Utah 84532 USA
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Ryals R, Eviner VT, Stein C, Suding KN, Silver WL. Grassland compost amendments increase plant production without changing plant communities. Ecosphere 2016. [DOI: 10.1002/ecs2.1270] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Rebecca Ryals
- Department of Environmental Science, Policy and ManagementUniversity of California, Berkeley 137 Mulford Hall #3114 Berkeley California 94720 USA
| | - Valerie T. Eviner
- Department of Plant SciencesUniversity of California, Davis 1210 PES Mail Stop 1, One Shields Ave Davis California 95616 USA
| | - Claudia Stein
- Department of Environmental Science, Policy and ManagementUniversity of California, Berkeley 137 Mulford Hall #3114 Berkeley California 94720 USA
| | - Katharine N. Suding
- Department of Environmental Science, Policy and ManagementUniversity of California, Berkeley 137 Mulford Hall #3114 Berkeley California 94720 USA
| | - Whendee L. Silver
- Department of Environmental Science, Policy and ManagementUniversity of California, Berkeley 137 Mulford Hall #3114 Berkeley California 94720 USA
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Gardner AM, Allan BF, Frisbie LA, Muturi EJ. Asymmetric effects of native and exotic invasive shrubs on ecology of the West Nile virus vector Culex pipiens (Diptera: Culicidae). Parasit Vectors 2015; 8:329. [PMID: 26076589 PMCID: PMC4469247 DOI: 10.1186/s13071-015-0941-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 06/05/2015] [Indexed: 08/24/2023] Open
Abstract
Background Exotic invasive plants alter the structure and function of native ecosystems and may influence the distribution and abundance of arthropod disease vectors by modifying habitat quality. This study investigated how invasive plants alter the ecology of Culex pipiens, an important vector of West Nile virus (WNV) in northeastern and midwestern regions of the United States. Methods Field and laboratory experiments were conducted to test the hypothesis that three native leaf species (Rubus allegheniensis, blackberry; Sambucus canadensis, elderberry; and Amelanchier laevis, serviceberry), and three exotic invasive leaf species (Lonicera maackii, Amur honeysuckle; Elaeagnus umbellata, autumn olive; and Rosa multiflora, multiflora rose) alter Cx. pipiens oviposition site selection, emergence rates, development time, and adult body size. The relative abundance of seven bacterial phyla in infusions of the six leaf species also was determined using quantitative real-time polymerase chain reaction to test the hypothesis that variation in emergence, development, and oviposition site selection is correlated to differences in the diversity and abundance of bacteria associated with different leaf species, important determinants of nutrient quality and availability for mosquito larvae. Results Leaf detritus from invasive honeysuckle and autumn olive yielded significantly higher adult emergence rates compared to detritus from the remaining leaf species and honeysuckle alleviated the negative effects of intraspecific competition on adult emergence. Conversely, leaves of native blackberry acted as an ecological trap, generating high oviposition but low emergence rates. Variation in bacterial flora associated with different leaf species may explain this asymmetrical production of mosquitoes: emergence rates and oviposition rates were positively correlated to bacterial abundance and diversity, respectively. Conclusions We conclude that the displacement of native understory plant species by certain invasive shrubs may increase production of Cx. pipiens with potential negative repercussions for human and wildlife health. These findings may be relevant to mosquito control and invasive plant management practices in the geographic range of Cx. pipiens. Further, our discovery of a previously unknown ecological trap for an important vector of WNV has the potential to lead to novel alternatives to conventional insecticides in mosquito control by exploiting the apparent “attract-kill” properties of this native plant species.
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Affiliation(s)
- Allison M Gardner
- Department of Entomology, University of Illinois at Urbana-Champaign, 505 S. Goodwin Ave., Urbana, IL, 61801, USA.
| | - Brian F Allan
- Department of Entomology, University of Illinois at Urbana-Champaign, 505 S. Goodwin Ave., Urbana, IL, 61801, USA. .,School of Integrative Biology, University of Illinois at Urbana-Champaign, 505 S. Goodwin Ave., Urbana, IL, 61801, USA.
| | - Lauren A Frisbie
- School of Integrative Biology, University of Illinois at Urbana-Champaign, 505 S. Goodwin Ave., Urbana, IL, 61801, USA.
| | - Ephantus J Muturi
- Illinois Natural History Survey, 1816 S. Oak St., Champaign, IL, 61820, USA.
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Shields JM, Jenkins MA, Zollner PA, Saunders MR. Effects of Amur honeysuckle invasion and removal on white-footed mice. J Wildl Manage 2014. [DOI: 10.1002/jwmg.730] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Joshua M. Shields
- Department of Forestry and Natural Resources and Hardwood Tree Improvement and Regeneration Center (HTIRC); Purdue University; 715 West State Street West Lafayette IN 47907 USA
| | - Michael A. Jenkins
- Department of Forestry and Natural Resources and Hardwood Tree Improvement and Regeneration Center (HTIRC); Purdue University; 715 West State Street West Lafayette IN 47907 USA
| | - Patrick A. Zollner
- Department of Forestry and Natural Resources; Purdue University; 195 Marsteller Street West Lafayette IN 47907 USA
| | - Michael R. Saunders
- Department of Forestry and Natural Resources and Hardwood Tree Improvement and Regeneration Center (HTIRC); Purdue University; 715 West State Street West Lafayette IN 47907 USA
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Meier ES, Dullinger S, Zimmermann NE, Baumgartner D, Gattringer A, Hülber K. Space matters when defining effective management for invasive plants. DIVERS DISTRIB 2014. [DOI: 10.1111/ddi.12201] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Affiliation(s)
- Eliane S. Meier
- Agroscope; Institute for Sustainability Sciences ISS; Reckenholzstrasse 191 CH-8046 Zürich Switzerland
| | - Stefan Dullinger
- Vienna Institute for Nature Conservation & Analyses; Giessergasse 6/7 A-1030 Vienna Austria
- Department of Conservation Biology, Vegetation and Landscape Ecology; Faculty Centre of Biodiversity; University of Vienna; Rennweg 14 A-1030 Vienna Austria
| | - Niklaus E. Zimmermann
- Dynamic Macroecology Group; Landscape Dynamics Unit; Swiss Federal Research Institute WSL; Zuercherstrasse 111 CH-8903 Birmensdorf Switzerland
| | - Daniel Baumgartner
- Economics and Social Sciences Group; Regional Economics and Development Unit; Swiss Federal Research Institute WSL; Zuercherstrasse 111 CH-8903 Birmensdorf Switzerland
| | - Andreas Gattringer
- Vienna Institute for Nature Conservation & Analyses; Giessergasse 6/7 A-1030 Vienna Austria
| | - Karl Hülber
- Vienna Institute for Nature Conservation & Analyses; Giessergasse 6/7 A-1030 Vienna Austria
- Department of Conservation Biology, Vegetation and Landscape Ecology; Faculty Centre of Biodiversity; University of Vienna; Rennweg 14 A-1030 Vienna Austria
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Davies KW, Nafus AM, Madsen MD. Medusahead Invasion Along Unimproved Roads, Animal Trails, and Random Transects. WEST N AM NATURALIST 2013. [DOI: 10.3398/064.073.0105] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Emery SM, Doran PJ, Legge JT, Kleitch M, Howard S. Aboveground and Belowground Impacts Following Removal of the Invasive Species Baby's Breath (Gypsophila paniculata) on Lake Michigan Sand Dunes. Restor Ecol 2012. [DOI: 10.1111/j.1526-100x.2012.00915.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Sarah M. Emery
- Department of Biology; University of Louisville; Louisville; KY; 40292; U.S.A
| | | | - John T. Legge
- The Nature Conservancy in Michigan; Lansing; MI; 48906; U.S.A
| | - Matthew Kleitch
- The Nature Conservancy in Michigan; Lansing; MI; 48906; U.S.A
| | - Shaun Howard
- The Nature Conservancy in Michigan; Lansing; MI; 48906; U.S.A
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Emry DJ, Alexander HM, Tourtellot MK. Modelling the local spread of invasive plants: importance of including spatial distribution and detectability in management plans. J Appl Ecol 2011. [DOI: 10.1111/j.1365-2664.2011.02050.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kollmann J, Brink-Jensen K, Frandsen SI, Hansen MK. Uprooting and Burial of Invasive Alien Plants: A New Tool in Coastal Restoration? Restor Ecol 2011. [DOI: 10.1111/j.1526-100x.2009.00569.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Davies KW. Plant community diversity and native plant abundance decline with increasing abundance of an exotic annual grass. Oecologia 2011; 167:481-91. [DOI: 10.1007/s00442-011-1992-2] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2010] [Accepted: 04/04/2011] [Indexed: 11/25/2022]
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Kettenring KM, Adams CR. Lessons learned from invasive plant control experiments: a systematic review and meta-analysis. J Appl Ecol 2011. [DOI: 10.1111/j.1365-2664.2011.01979.x] [Citation(s) in RCA: 341] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Beauchamp VB, Shafroth PB. Floristic composition, beta diversity, and nestedness of reference sites for restoration of xeroriparian areas. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2011; 21:465-476. [PMID: 21563577 DOI: 10.1890/09-1638.1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In restoration ecology, reference sites serve as models for areas to be restored and can provide a standard of comparison for restoration project outcomes. When reference sites are located a relatively long distance from associated restoration projects, differences in climate, disturbance history, and biogeography can increase beta diversity and may decrease the relevance of reference sites. Variation in factors at the scale of individual reference sites such as patch size, microclimate, barriers to dispersal, or soil chemistry can result in reference site species composition that is a nested subset of the regional species pool. In the Western United States, restoration of riparian areas, particularly those occupied by Tamarix spp., has become a priority; however, little is known about suitable native replacement vegetation communities for relatively dry and saline riparian terraces that comprise many of the sites where Tamarix is removed prior to restoration activities. We studied plant communities on riparian terraces along five rivers in New Mexico, USA, to (1) determine whether the floristic composition of reference sites can be predicted by easily measured soil variables such as pH, salinity (electric conductivity), and texture; (2) examine the extent of distance decay in the compositional similarity of xeroriparian plant communities in the southwestern United States; and (3) determine the degree of nestedness in xeroriparian plant communities in relationship to soil variables. We found that sites clustered into groups based largely on variation in soil salinity and texture. Vegetation across all sites was highly nested with dominant, salt-tolerant species found on most soil groups and salt-intolerant subordinate species restricted to low-salinity soils. The identity of subordinate species was largely site dependent, causing all sites to have the same low degree of similarity regardless of the distance between them. We conclude that, when planning restoration projects on dry and saline riparian sites, soil salinity and texture are good predictors of which species will be most suited to the area being restored, but a candidate species pool should be developed from the nearest possible reference sites, particularly for subordinate species.
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Affiliation(s)
- Vanessa B Beauchamp
- ASRC Management Services contracted to U.S. Geological Survey, Fort Collins Science Center, 2150 Centre Avenue, Building C, Fort Collins, Colorado 80526, USA.
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Rood SB, Braatne JH, Goater LA. Favorable fragmentation: river reservoirs can impede downstream expansion of riparian weeds. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2010; 20:1664-1677. [PMID: 20945766 DOI: 10.1890/09-0063.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
River valleys represent biologically rich corridors characterized by natural disturbances that create moist and barren sites suitable for colonization by native riparian plants, and also by weeds. Dams and reservoirs interrupt the longitudinal corridors and we hypothesized that this could restrict downstream weed expansion. To consider this "reservoir impediment" hypothesis we assessed the occurrences and abundances of weeds along a 315-km river valley corridor that commenced with an unimpounded reach of the Snake River and extended through Brownlee, Oxbow, and Hells Canyon reservoirs and dams, and downstream along the Snake River. Sampling along 206 belt transects with 3610 quadrats revealed 16 noxious and four invasive weed species. Ten weeds were upland plants, with Canada thistle (Cirsium arvense) restricted to the upstream reaches, where field morning glory (Convolvulus arvensis) was also more common. In contrast, St. John's wort (Hypericum perforatum) was more abundant below the dams, and medusahead wildrye (Taeniatherum caput-medusae) occurred primarily along the reservoirs. All seven riparian species were abundant in the upstream zones but sparse or absent below the dams. This pattern was observed for the facultative riparian species, poison hemlock (Conium maculatum) and perennial pepperweed (Lepidium latifolium), the obligate riparian, yellow nut sedge (Cyperus esculentus), the invasive perennial, reed canary grass (Phalaris arundinacea), and three invasive riparian trees, Russian olive (Elaeagnus angustifolia), false indigo (Amorpha fruticosa), and tamarisk (Tamarix spp.). The hydrophyte purple loosestrife (Lythrum salicaria) was also restricted to the upstream zone. These longitudinal patterns indicate that the reservoirs have impeded the downstream expansion of riparian weeds, and this may especially result from the repetitive draw-down and refilling of Brownlee Reservoir that imposes a lethal combination of drought and flood stress. The dams and reservoirs may also interrupt hydrochory, the downstream flow of seeds and clonal fragments. We thus conclude that with some operational patterns, dams and reservoirs can impede the downstream expansion of riparian weeds.
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Affiliation(s)
- Stewart B Rood
- Department of Biological Sciences, University of Lethbridge, Alberta T1K 3M4, Canada.
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Preece N, Harvey K, Hempel C, Woinarski JCZ. Uneven distribution of weeds along extensive transects in Australia’s Northern Territory points to management solutions. ECOLOGICAL MANAGEMENT & RESTORATION 2010. [DOI: 10.1111/j.1442-8903.2010.00530.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Spread of an invasive grass in closed-canopy deciduous forests across local and regional environmental gradients. Biol Invasions 2009. [DOI: 10.1007/s10530-009-9610-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Davis NE, Forsyth DM, Coulson G. Facilitative interactions between an exotic mammal and native and exotic plants: hog deer (Axis porcinus) as seed dispersers in south-eastern Australia. Biol Invasions 2009. [DOI: 10.1007/s10530-009-9525-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Angassa A, Oba G. Bush encroachment control demonstrations in southern Ethiopia: 1. Woody species survival strategies with implications for herder land management. Afr J Ecol 2009. [DOI: 10.1111/j.1365-2028.2007.00919.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Price AJ, Runion GB, Prior SA, Rogers HH, Torbert HA. Tropical spiderwort (Commelina benghalensis L.) increases growth under elevated atmospheric carbon dioxide. JOURNAL OF ENVIRONMENTAL QUALITY 2009; 38:729-33. [PMID: 19244494 DOI: 10.2134/jeq2007.0621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Although considerable effort is being spent studying exotic plant pests, little consideration has been given as to how invasive plants might react to the increasing concentration of CO(2) in the atmosphere. Tropical spiderwort (Commelina benghalensis L.) is considered one the world's worst weeds and is becoming more of a problem in agricultural settings of the southeastern USA. Growth responses of tropical spiderwort were evaluated using plants grown in containers with a soilless potting medium under ambient and elevated (ambient + 200 mumol mol(-)(1)) levels of CO(2) in open-top field chambers. Although plant height was unaffected by CO(2), leaf and flower number tended to increase (approximately 23%) when exposed to elevated CO(2). Aboveground plant parts exhibited significant increases in dry weight when exposed to high CO(2); leaf, flower, stem, and total shoot dry weights were increased by 36, 30, 48, and 44%, respectively. Total plant dry weight was increased by 41% for plants grown under high CO(2). Root dry weight and root length were unaffected by CO(2) concentration. Tropical spiderwort allocated more biomass to stems and tended to allocate less to roots when plants were exposed to high CO(2). Plant carbon concentration and content tended to be higher in CO(2)-enriched plants, whereas plant nitrogen concentration tended to be lower; thus, elevated CO(2)-grown plants had higher C/N ratios. Also, the amount of biomass produced per unit nitrogen was higher for plants exposed to elevated CO(2). The growth response of this plant is in the upper range typical for C3 plants.
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Affiliation(s)
- Andrew J Price
- USDA-ARS, National Soil Dynamics Lab., 411 S. Donahue Dr., Auburn, AL 36832, USA.
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Blumenthal D, Chimner RA, Welker JM, Morgan JA. Increased snow facilitates plant invasion in mixedgrass prairie. THE NEW PHYTOLOGIST 2008; 179:440-448. [PMID: 19086291 DOI: 10.1111/j.1469-8137.2008.02475.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Although global change is known to influence plant invasion, little is known about interactions between altered precipitation and invasion. In the North American mixedgrass prairie, invasive species are often abundant in wet and nitrogen (N)-rich areas, suggesting that predicted changes in precipitation and N deposition could exacerbate invasion. Here, this possibility was tested by seeding six invasive species into experimental plots of mixedgrass prairie treated with a factorial combination of increased snow, summer irrigation, and N addition. Without added snow, seeded invasive species were rarely observed. Snow addition increased average above-ground biomass of Centaurea diffusa from 0.026 to 66 g m(-2), of Gypsophila paniculata from 0.1 to 7.3 g m(-2), and of Linaria dalmatica from 5 to 101 g m(-2). Given added snow, summer irrigation increased the density of G. paniculata, and N addition increased the density and biomass of L. dalmatica. Plant density responses mirrored those of plant biomass, indicating that increases in biomass resulted, in part, from increases in recruitment. In contrast to seeded invasive species, resident species did not respond to snow addition. These results suggest that increases in snowfall or variability of snowfall may exacerbate forb invasion in the mixedgrass prairie.
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Affiliation(s)
- D Blumenthal
- USDA ARS Rangeland Resources Research Unit, 1701 Center Avenue, Fort Collins, CO 80526, USA
| | - R A Chimner
- Natural Resource Ecology Laboratory, Colorado, State University, Fort Collins, CO 80523, USA
| | - J M Welker
- Natural Resource Ecology Laboratory, Colorado, State University, Fort Collins, CO 80523, USA
- Environment and Natural Resources Institute and Biology Department, University of Alaska Anchorage, Anchorage, AK, USA
| | - J A Morgan
- USDA ARS Rangeland Resources Research Unit, 1701 Center Avenue, Fort Collins, CO 80526, USA
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Marushia RG, Holt JS. Reproductive strategy of an invasive thistle: effects of adults on seedling survival. Biol Invasions 2008. [DOI: 10.1007/s10530-008-9234-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abbott LB, Lepak D, Daniel DL. VEGETATIVE AND REPRODUCTIVE PHENOLOGY OF AFRICAN RUE (PEGANUM HARMALA) IN THE NORTHERN CHIHUAHUAN DESERT. SOUTHWEST NAT 2007. [DOI: 10.1894/0038-4909(2007)52[209:varpoa]2.0.co;2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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PETERS DEBRAPC, BESTELMEYER BRANDONT, HERRICK JEFFREYE, FREDRICKSON EDL, MONGER HCURTIS, HAVSTAD KRISM. Disentangling Complex Landscapes: New Insights into Arid and Semiarid System Dynamics. Bioscience 2006. [DOI: 10.1641/0006-3568(2006)56[491:dclnii]2.0.co;2] [Citation(s) in RCA: 172] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Moisey DM, Bork EW, Willms WD. Non-destructive assessment of cattle forage selection: A test of skim grazing in fescue grassland. Appl Anim Behav Sci 2005. [DOI: 10.1016/j.applanim.2005.02.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ferdinands K, Beggs K, Whitehead P. Biodiversity and invasive grass species: multiple-use or monoculture? WILDLIFE RESEARCH 2005. [DOI: 10.1071/wr04036] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Invasive plants are recognised as a major threat to biodiversity conservation worldwide. Despite this recognition, our understanding of the mechanisms controlling the invasion process and its impact on flora and fauna is often poor. We examined the impact of an invasive aquatic grass species, para grass (Urochloa mutica), on seasonally inundated wetlands in tropical northern Australia. Flora and avifauna were surveyed at sites invaded by para grass and in native vegetation. Spatial information systems were used to design surveys and determine environmental correlates of para grass distribution and so predict the potential future spread of para grass and infer impacts in the absence of control. Where para grass was present the median number of plant taxa was ~75% lower. Few birds showed preference for habitats invaded by para grass, and most birds were associated with areas of native vegetation or other habitats with little or no para grass. The study identified several wetland habitats that are at greater risk of invasion, based on the apparent habitat preferences of para grass. The degradation or loss of some of these ‘at-risk’ habitats, including Oryza meriodionalis grasslands that play an integral role in the wetland food chain, has important ramifications for the levels of biodiversity supported by the wetlands.
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