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| Pàgina inicial > Articles > Articles publicats > Forest and woodland replacement patterns following drought-related mortality |
(Centre de Recerca Ecològica i d'Aplicacions Forestals) (Centre de Recerca Ecològica i d'Aplicacions Forestals) (University of Helsinki. Department of Forest Sciences) (University of Utah. School of Biological Sciences) (World Agroforestry Centre (ICRAF)) (Oklahoma State University. Department of Natural Resource Ecology and Management) (ETH Zürich. Department of Environmental Systems Science) (Instituto Pirenaico de Ecología) (Instituto Pirenaico de Ecología) (Western Colorado University. School of Environment and Sustainability) (Natural History Institute (Prescott, Estats Units)) (Centre de Recerca Ecològica i d'Aplicacions Forestals) (United States Department of Agriculture) (University of California, Berkeley. Department of Environmental Science, Policy, and Management) (California State University. Department of Biology) (Humboldt State University. Department of Forestry and Wildland Resources) (Universidad Nacional del Comahue. Departamento de Ecología) (Universidad Pablo de Olavide. Departamento de Sistemas Físicos, Químicos y Naturales) (Murdoch University. School of Veterinary and Life Sciences) (University of Córdoba. Departamento de Ingeniería Forestal) (California State University. Department of Biology) (Colorado State University. Department of Forest) (ETH Zürich. Department of Environmental Sciences) (University of Basilicata. School of Agricultural, Forest, Food and Environmental Sciences) (Universidad de Valladolid. Instituto Universitario de Investigación Gestión Forestal Sostenible) (Consejo Nacional de Ciencia y Tecnología (Comahue, Argentina). Instituto de Investigaciones en Biodiversidad y Medioambiente) (Consejo Nacional de Ciencia y Tecnología (Comahue, Argentina). Instituto de Investigaciones en Biodiversidad y Medioambiente) (University of Colorado Boulder. Department of Geography) (University of Stirling. Faculty of Natural Sciences) (Université Catholique de Louvain. Faculty of Bioscience Engineering) (La Trobe University. Department of Ecology, Environment and Evolution)
| Data: | 2020 |
| Resum: | Forests are experiencing growing risks of drought-induced mortality in a warming world. Yet, ecosystem dynamics following drought mortality remain unknown, representing a major limitation to our understanding of the ecological consequences of climate change. We provide an emerging picture of postdrought ecological trajectories based on field indicators of forest dynamics. Replacement patterns following mortality indicate limited short-term persistence of predrought dominant tree species, highlighting the potential for major ecosystem reorganization in the coming decades. The great variability of the observed dynamics within and among species reinforces the primary influence of drought characteristics and ecosystem legacies, modulated by land use, management, and past disturbances, on ongoing drought-related species turnover and their potential implications for future forest biodiversity and ecosystem services. Forest vulnerability to drought is expected to increase under anthropogenic climate change, and drought-induced mortality and community dynamics following drought have major ecological and societal impacts. Here, we show that tree mortality concomitant with drought has led to short-term (mean 5 y, range 1 to 23 y after mortality) vegetation-type conversion in multiple biomes across the world (131 sites). Self-replacement of the dominant tree species was only prevalent in 21% of the examined cases and forests and woodlands shifted to nonwoody vegetation in 10% of them. The ultimate temporal persistence of such changes remains unknown but, given the key role of biological legacies in long-term ecological succession, this emerging picture of postdrought ecological trajectories highlights the potential for major ecosystem reorganization in the coming decades. Community changes were less pronounced under wetter postmortality conditions. Replacement was also influenced by management intensity, and postdrought shrub dominance was higher when pathogens acted as codrivers of tree mortality. Early change in community composition indicates that forests dominated by mesic species generally shifted toward more xeric communities, with replacing tree and shrub species exhibiting drier bioclimatic optima and distribution ranges. However, shifts toward more mesic communities also occurred and multiple pathways of forest replacement were observed for some species. Drought characteristics, species-specific environmental preferences, plant traits, and ecosystem legacies govern postdrought species turnover and subsequent ecological trajectories, with potential far-reaching implications for forest biodiversity and ecosystem services. |
| Ajuts: | European Commission 656300 Ministerio de Economía y Competitividad CGL2017-87176-P Ministerio de Economía y Competitividad CGL2015-67419-R Ministerio de Ciencia e Innovación FJCI 2016-30121 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1001 |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.  |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | Drought-induced mortality ; Forest dynamics ; Forest resilience ; Global tree mortality ; Climate change |
| Publicat a: | Proceedings of the National Academy of Sciences of the United States of America, Vol. 117, issue 47 (Nov. 2020) , p. 29720-29729, ISSN 1091-6490 |
