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Moisan MA, Lajoie G, Constant P, Martineau C, Maire V. How tree traits modulate tree methane fluxes: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 940:173730. [PMID: 38839018 DOI: 10.1016/j.scitotenv.2024.173730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 05/31/2024] [Accepted: 06/01/2024] [Indexed: 06/07/2024]
Abstract
Trees can play different roles in the regulation of fluxes of methane (CH4), a greenhouse gas with a warming potential 83 times greater than that of carbon dioxide. Forest soils have the greatest potential for methane uptake compared to other land uses. In addition to their influence on soil CH4 fluxes, trees can act directly as a source or sink of CH4, by transporting CH4 produced in the soil and harbouring the key microorganisms involved in CH4 production and consumption (methanogens and methanotrophs). Tree CH4 fluxes can vary between species characterized by different traits that influence transport and modify the availability of CH4 reaction substrates as well as the habitat for methanogens and methanotrophs. Despite their important role in modulating CH4 fluxes from forest ecosystems, the identity and role of tree traits influencing these fluxes are poorly consolidated in the literature. The objectives of this paper are to 1) Review the functional traits of trees associated with their role in the regulation of CH4 emissions; 2) Assess the importance of inter-specific variability in CH4 fluxes via a global analysis of tree methane fluxes in the literature. Our review highlights that differences in CH4 fluxes between tree species and individuals can be explained by a diversity of traits influencing CH4 transport and microbial production of CH4 such as wood density and secondary metabolites. We propose a functional classification for trees based on the key traits associated with a function in CH4 emissions. We identified the fast-growing species with low wood density, species adapted to flood and species vulnerable to rot as functional groups which can be net sources of CH4 in conditions favorable to CH4 production. The global analysis further demonstrated the importance of taxonomy, with other factors such as land type and season in explaining variability in tree CH4 fluxes.
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Affiliation(s)
- Marie-Ange Moisan
- Canadian Forest Service, Natural Resources Canada, Laurentian Forestry Centre, 1055 Rue du Peps, Québec, QC G1V 4C7, Canada; Département des Sciences de l'environnement, Université du Québec à Trois-Rivières, 3351 Bd des Forges, Trois-Rivières, QC G8Z 4M3, Canada; Centre de Recherche sur les Interactions Bassins Versants - Écosystèmes Aquatiques (RIVE), Université du Québec à Trois-Rivières, 3351 Bd des Forges, Trois-Rivières, QC G8Z 4M3, Canada.
| | - Geneviève Lajoie
- Institut de Recherche en Biologie Végétale, Université de Montréal, 4101 Sherbrooke St E, Montréal H1X 2B2, Canada; Jardin Botanique de Montréal, 4101 Sherbrooke St E, Montréal H1X 2B2, Canada
| | - Philippe Constant
- Institut national de la recherche scientifique, Centre Armand-Frappier Santé Biotechnologie, 531 Boul des Prairies, Laval, QC H7V 1B7, Canada
| | - Christine Martineau
- Canadian Forest Service, Natural Resources Canada, Laurentian Forestry Centre, 1055 Rue du Peps, Québec, QC G1V 4C7, Canada
| | - Vincent Maire
- Département des Sciences de l'environnement, Université du Québec à Trois-Rivières, 3351 Bd des Forges, Trois-Rivières, QC G8Z 4M3, Canada; Centre de Recherche sur les Interactions Bassins Versants - Écosystèmes Aquatiques (RIVE), Université du Québec à Trois-Rivières, 3351 Bd des Forges, Trois-Rivières, QC G8Z 4M3, Canada
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Juhász E, Bede‐Fazekas Á, Katona K, Molnár Z, Biró M. Foraging decisions with conservation consequences: Interaction between beavers and invasive tree species. Ecol Evol 2022; 12:e8899. [PMID: 35600682 PMCID: PMC9108316 DOI: 10.1002/ece3.8899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 04/06/2022] [Accepted: 04/19/2022] [Indexed: 11/21/2022] Open
Abstract
Herbivore species can either hinder or accelerate the invasion of woody species through selective utilization. Therefore, an exploration of foraging decisions can contribute to the understanding and forecasting of woody plant invasions. Despite the large distribution range and rapidly growing abundance of beaver species across the Northern Hemisphere, only a few studies focus on the interaction between beavers and invasive woody plants. We collected data on the woody plant supply and utilization at 20 study sites in Hungary, at two fixed distances from the water. The following parameters were registered: taxon, trunk diameter, type of utilization, and carving depth. Altogether 5401 units (trunks and thick branches) were identified individually. We developed a statistical protocol that uses a dual approach, combining whole‐database and transect‐level analyses to examine foraging strategy. Taxon, diameter, and distance from water all had a significant effect on foraging decisions. The order of preference for the four most abundant taxa was Populus spp. (softwood), Salix spp. (softwood), Fraxinus pennsylvanica (invasive hardwood), and Acer negundo (invasive hardwood). The diameter influenced the type of utilization, as units with greater diameter were rather carved or debarked than felled. According to the central‐place foraging strategy, the intensity of the foraging decreased with the distance from the water, while both the taxon and diameter selectivity increased. This suggests stronger modification of the woody vegetation directly along the waterbank, together with a weaker impact further from the water. In contrast to invasive trees, for which utilization occurred almost exclusively in the smallest diameter class, even the largest softwood trees were utilized by means of carving and debarking. This may lead to the gradual loss of softwoods or the transformation of them into shrubby forms. After the return of the beaver, mature stages of softwood stands and thus the structural heterogeneity of floodplain woody vegetation could be supported by the maintenance of sufficiently large active floodplains. The beaver accelerates the shift of the canopy layer's species composition toward invasive hardwood species, supporting the enemy release hypothesis. However, the long‐term impact will also depend on how plants respond to different types of utilization and on their ability to regenerate, which are still unexplored issues in this environment. Our results should be integrated with knowledge about factors influencing the competitiveness of the studied native and invasive woody species to support floodplain conservation and reconstruction.
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Affiliation(s)
- Erika Juhász
- Department of Plant Systematics, Ecology and Theoretical Biology Institute of Biology Eötvös Loránd University Budapest Hungary
- Centre for Ecological Research Institute of Ecology and Botany Vácrátót Hungary
| | - Ákos Bede‐Fazekas
- Centre for Ecological Research Institute of Ecology and Botany Vácrátót Hungary
- Centre for Ecological Research GINOP Sustainable Ecosystems Group Tihany Hungary
- Faculty of Science Department of Environmental and Landscape Geography Eötvös Loránd University Budapest Hungary
| | - Krisztián Katona
- Department of Wildlife Biology and Management Institute for Wildlife Management and Nature Conservation Hungarian University of Agriculture and Life Sciences Gödöllő Hungary
| | - Zsolt Molnár
- Centre for Ecological Research Institute of Ecology and Botany Vácrátót Hungary
| | - Marianna Biró
- Centre for Ecological Research Institute of Ecology and Botany Vácrátót Hungary
- Centre for Ecological Research GINOP Sustainable Ecosystems Group Tihany Hungary
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Legacy effects of herbivory on treeline dynamics along an elevational gradient. Oecologia 2022; 198:801-814. [PMID: 35149919 PMCID: PMC8956534 DOI: 10.1007/s00442-022-05125-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 01/25/2022] [Indexed: 11/13/2022]
Abstract
Treelines are expected to expand into alpine ecosystems with global warming, but herbivory may delay this expansion. This study quantifies long-term effects of temporally varying sheep densities on birch recruitment and growth in the treeline ecotone. We examined treeline ecotone successional trajectories and legacy effects in a replicated experimental setup, where enclosures were present for 14 years with three different sheep densities (0, 25, 80 sheep km−2). Before and after the enclosures were present, the site had an ambient sheep density of 20–25 km−2. We sampled field data 4 years after enclosure removal and compared these to data sampled 8 and 9 years after enclosure erection. We sampled data on birch browsing pressure, birch distribution across life-stages (recruits, saplings, and mature trees), and birch annual radial growth. Fourteen years of increased or decreased sheep density had observable legacy effects depending on birch life-stage. Birch recruit prevalence decreased in areas, where sheep were reintroduced after being absent for 14 years. For the same areas, sapling and mature tree prevalence increased, indicating that these areas have entered alternative successional trajectories compared to areas, where sheep were present the whole time. Birch annual radial growth showed a lag effect of 2 years after enclosure removal, with growth decreasing in areas where sheep had been absent for 14 years and increasing where sheep densities were high. Thus, decadal-scale absences of herbivores can leave legacy effects due to increased numbers of trees that have high resistance to later-introduced herbivore browsing.
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Terranova M, Eggerschwiler L, Ortmann S, Clauss M, Kreuzer M, Schwarm A. Increasing the proportion of hazel leaves in the diet of dairy cows reduced methane yield and excretion of nitrogen in volatile form, but not milk yield. Anim Feed Sci Technol 2021. [DOI: 10.1016/j.anifeedsci.2020.114790] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Filippi A, Braidot E, Petrussa E, Fabro M, Vuerich M, Boscutti F. Plant growth shapes the effects of elevation on the content and variability of flavonoids in subalpine bilberry stands. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23:241-249. [PMID: 33037753 DOI: 10.1111/plb.13194] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
The study of morphological and physiological responses of shrubs to climate is crucial for the understanding of future scenarios regarding climate change. In this light, studying shrub growth and physiological acclimation along an elevation gradient might be insightful. The phenolic metabolic pathway represents a powerful tool to interpret such processes. In the South-Eastern Alps, we investigated the relationships between elevation, plant traits (i.e. age, xylem ring width, annual shoot length), plant-plant interaction (i.e. shrub cover) and flavonoids in Vaccinium myrtillus L. (leaves, berries) in stands above the treeline. The relationships were parsed within causal networks using a confirmatory path analysis. Elevation was the main driver of V. myrtillus growth, having both direct and indirect effects on the leaf flavonoid content, but this was less evident for berries. In particular, the content of foliar flavonoids showed a peak at mid-elevation and where the growth of xylem rings was intermediate, while it decreased in stands with higher shoot length. Flavonoid content variability of both leaves and berries was affected by elevation and shoot length. In berries, flavonoid variability was further related to all growth traits and shrub cover. These findings evidence that flavonoid content is influenced by both elevation and growth traits of V. myrtillus, often showing non-linear relationships. These results suggest a trait-mediated response of this plant to climate conditions as a result of trade-offs between plant growth, plant defence, environmental stress and nutrient/resource availability.
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Affiliation(s)
- A Filippi
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - E Braidot
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - E Petrussa
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - M Fabro
- Servizio fitosanitario e chimico, ricerca, sperimentazione e assistenza tecnica, ERSA, Pozzuolo del Friuli, Italy
| | - M Vuerich
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - F Boscutti
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
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Xiao L, Ding J, Zhang J, Huang W, Siemann E. Chemical responses of an invasive plant to herbivory and abiotic environments reveal a novel invasion mechanism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 741:140452. [PMID: 32886966 DOI: 10.1016/j.scitotenv.2020.140452] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 06/16/2020] [Accepted: 06/21/2020] [Indexed: 06/11/2023]
Abstract
Invasive plant environments differ along latitudes and between native and introduced ranges. In response to herbivory and abiotic stresses that vary with latitudes and between ranges, invasive plants may shift their secondary chemicals to facilitate invasion success. However, it remains unclear whether and how invasive plant chemical responses to herbivory and chemical responses to abiotic environments are associated. We conducted large scale field surveys of herbivory on the invasive tallow tree (Triadica sebifera) along latitudes in both its native (China) and introduced ranges (United States) and collected leaf samples for analyses of tannins and flavonoids. We used data on climate and solar radiation to examine these chemical responses to abiotic environments and their variations along these latitudes and between ranges. We also re-analyzed previously published data from multiple common garden experiments on tallow tree to investigate genetic divergence of secondary chemical concentrations between introduced and native populations. We found foliar tannins and herbivory (chewing, sucking) were higher in the native range compared to the invasive range. Allocation to tannins versus flavonoids decreased with latitude in the native range but did not vary in the invasive range. Analyses of previously published common garden experimental data indicated genetic divergence contributes to chemical concentration differences between ranges. Our field data further indicated that the latitudinal patterns were primarily phenotypic responses to herbivory in China while in US they were primarily phenotypic responses to abiotic environments. The variation of tannins may be linked to flavonoids, given tannins and flavonoids share a biosynthesis pathway. Together, our results suggest that invasive plants adjust their secondary metabolism to decrease chemicals that primarily defend against herbivory and increase those that help them to respond to their abiotic environment. These findings deepen our understanding of how invasive plants adapt to biogeographically heterogeneous environments through trade-offs between secondary chemical responses.
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Affiliation(s)
- Li Xiao
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei 430074, China; University of Chinese Academy of Sciences, Beijing 100049, China; National Engineering Laboratory for Applied Technology of Forestry & Ecology in Southern China, College of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
| | - Jianqing Ding
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, Henan 475004, China.
| | - Jialiang Zhang
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei 430074, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wei Huang
- CAS Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, Hubei 430074, China; Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
| | - Evan Siemann
- Biosciences Department, Rice University, Houston, TX, USA
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Artemkina NA, Orlova MA, Lukina NV. Spatial Variation in the Concentration of Phenolic Compounds and Nutritional Elements in the Needles of Spruce in Northern Taiga Forests. CONTEMP PROBL ECOL+ 2020. [DOI: 10.1134/s1995425519070023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Phytochemical Shift from Condensed Tannins to Flavonoids in Transgenic Betula pendula Decreases Consumption and Growth but Improves Growth Efficiency of Epirrita autumnata Larvae. J Chem Ecol 2019; 46:217-231. [PMID: 31879865 PMCID: PMC7056695 DOI: 10.1007/s10886-019-01134-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/31/2019] [Accepted: 12/09/2019] [Indexed: 11/16/2022]
Abstract
Despite active research, antiherbivore activity of specific plant phenolics remains largely unresolved. We constructed silver birch (Betula pendula) lines with modified phenolic metabolism to study the effects of foliar flavonoids and condensed tannins on consumption and growth of larvae of a generalist herbivore, the autumnal moth (Epirrita autumnata). We conducted a feeding experiment using birch lines in which expression of dihydroflavonol reductase (DFR), anthocyanidin synthase (ANS) or anthocyanidin reductase (ANR) had been decreased by RNA interference. Modification-specific effects on plant phenolics, nutrients and phenotype, and on larval consumption and growth were analyzed using uni- and multivariate methods. Inhibiting DFR expression increased the concentration of flavonoids at the expense of condensed tannins, and silencing DFR and ANR decreased leaf and plant size. E. autumnata larvae consumed on average 82% less of DFRi plants than of unmodified controls, suggesting that flavonoids or glandular trichomes deter larval feeding. However, larval growth efficiency was highest on low-tannin DFRi plants, indicating that condensed tannins (or their monomers) are physiologically more harmful than non-tannin flavonoids for E. autumnata larvae. Our results show that genetic manipulation of the flavonoid pathway in plants can effectively be used to produce altered phenolic profiles required for elucidating the roles of low-molecular weight phenolics and condensed tannins in plant–herbivore relationships, and suggest that phenolic secondary metabolites participate in regulation of plant growth.
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Cope OL, Kruger EL, Rubert‐Nason KF, Lindroth RL. Chemical defense over decadal scales: Ontogenetic allocation trajectories and consequences for fitness in a foundation tree species. Funct Ecol 2019. [DOI: 10.1111/1365-2435.13425] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Olivia L. Cope
- Department of Integrative Biology University of Wisconsin‐Madison Madison WI USA
| | - Eric L. Kruger
- Department of Forest and Wildlife Ecology University of Wisconsin‐Madison Madison WI USA
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Wam HK, Herfindal I. Subtle foodscape displacement of a native ungulate by free-ranging livestock in a forest agroecosystem. Ecosphere 2018. [DOI: 10.1002/ecs2.2280] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Hilde Karine Wam
- Division of Forestry and Forest Resources; NIBIO; N-1431 Ås Norway
| | - Ivar Herfindal
- Department of Biology; Centre for Biodiversity Dynamics; Norwegian University of Science and Technology (NTNU); N-7491 Trondheim Norway
- Department of Landscape and Biodiversity; NIBIO; N-1431 Ås Norway
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Felton AM, Wam HK, Stolter C, Mathisen KM, Wallgren M. The complexity of interacting nutritional drivers behind food selection, a review of northern cervids. Ecosphere 2018. [DOI: 10.1002/ecs2.2230] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Affiliation(s)
- Annika M. Felton
- Southern Swedish Forest Research Centre Faculty of Forest Sciences Swedish University of Agricultural Sciences P.O. Box 49 Alnarp SE‐230 53 Sweden
| | - Hilde K. Wam
- Division of Forestry and Forest Resources NIBIO P.O. Box 115 Ås NO‐1431 Norway
| | - Caroline Stolter
- Department of Animal Ecology and Conservation Institute of Zoology University of Hamburg Hamburg 20146 Germany
| | - Karen M. Mathisen
- Faculty of Applied Ecology and Agricultural Sciences Institute of Forestry and Wildlife Management ‐ Evenstad Inland Norway University of Applied Sciences P.O. Box 400 Elverum NO‐2418 Norway
| | - Märtha Wallgren
- Forestry Research Institute of Sweden Uppsala Science Park Uppsala SE‐751 83 Sweden
- Department of Wildlife, Fish, and Environmental Studies Faculty of Forest Sciences Swedish University of Agricultural Sciences Umeå SE‐901 83 Sweden
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Plant Secondary Metabolites—Missing Pieces in the Soil Organic Matter Puzzle of Boreal Forests. SOIL SYSTEMS 2018. [DOI: 10.3390/soils2010002] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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