Intensive grassland management disrupts below-ground multi-trophic resource transfer in response to drought.

Autor: Chomel M; Department of Earth and Environmental Sciences, The University of Manchester, Manchester, M13 9PT, UK. mathilde.chomel@fibl.org.; FiBL France, Research Institute of Organic Agriculture, 26400, Eurre, France. mathilde.chomel@fibl.org., Lavallee JM; Department of Earth and Environmental Sciences, The University of Manchester, Manchester, M13 9PT, UK.; Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO, USA.; Environmental Defense Fund, 257 Park Ave S, New York, NY, USA., Alvarez-Segura N; Institute of Biological and Environmental Sciences, University of Aberdeen, Cruickshank Building, Aberdeen, AB24 3UU, UK.; Department of Climate Change, EURECAT, Technological Centre of Catalonia, Amposta, Spain., Baggs EM; Global Academy of Agriculture and Food Systems, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Midlothian, UK., Caruso T; School of Biological Sciences and Institute for Global Food Security, Queen's University of Belfast, Belfast, UK.; School of Biology and Environmental Science, University College Dublin, Dublin, Ireland., de Castro F; School of Biological Sciences and Institute for Global Food Security, Queen's University of Belfast, Belfast, UK.; AgriFood & Biosciences Institute, Belfast, UK., Emmerson MC; School of Biological Sciences and Institute for Global Food Security, Queen's University of Belfast, Belfast, UK., Magilton M; School of Biological Sciences and Institute for Global Food Security, Queen's University of Belfast, Belfast, UK.; School of Life Sciences, University of Lincoln, Lincoln, UK., Rhymes JM; Department of Earth and Environmental Sciences, The University of Manchester, Manchester, M13 9PT, UK.; UK Centre for Ecology and Hydrology, Environment Centre Wales, Deiniol Road, Bangor, LL57 2UW, UK., de Vries FT; Department of Earth and Environmental Sciences, The University of Manchester, Manchester, M13 9PT, UK.; Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, the Netherlands., Johnson D; Department of Earth and Environmental Sciences, The University of Manchester, Manchester, M13 9PT, UK., Bardgett RD; Department of Earth and Environmental Sciences, The University of Manchester, Manchester, M13 9PT, UK.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2022 Nov 16; Vol. 13 (1), pp. 6991. Date of Electronic Publication: 2022 Nov 16.
DOI: 10.1038/s41467-022-34449-5
Abstrakt: Modification of soil food webs by land management may alter the response of ecosystem processes to climate extremes, but empirical support is limited and the mechanisms involved remain unclear. Here we quantify how grassland management modifies the transfer of recent photosynthates and soil nitrogen through plants and soil food webs during a post-drought period in a controlled field experiment, using in situ 13 C and 15 N pulse-labelling in intensively and extensively managed fields. We show that intensive management decrease plant carbon (C) capture and its transfer through components of food webs and soil respiration compared to extensive management. We observe a legacy effect of drought on C transfer pathways mainly in intensively managed grasslands, by increasing plant C assimilation and 13 C released as soil CO 2 efflux but decreasing its transfer to roots, bacteria and Collembola. Our work provides insight into the interactive effects of grassland management and drought on C transfer pathways, and highlights that capture and rapid transfer of photosynthates through multi-trophic networks are key for maintaining grassland resistance to drought.
(© 2022. The Author(s).)
Databáze: MEDLINE
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