Chomel, Mathilde; Lavallee, Jocelyn M.; Alvarez-Segura, Nil; Baggs, Elizabeth M.; Caruso, Tancredi; de Castro, Francisco; Emmerson, Mark C.; Magilton, Matthew; Rhymes, Jennifer M.; de Vries, Franciska T.; Johnson, David and Bardgett, Richard D. (2022) Intensive grassland management disrupts below-ground multi-trophic resource transfer in response to drought. Nature Communications, 13 (1), pp. 1-12.
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Summary
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 13C and 15N 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 13C released as soil CO2 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.
EPrint Type: | Journal paper |
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Keywords: | grassland, plant-soil interaction, pulse-labelling, root-derived C, Collembola, Acari, microorganisms, soil biodiversity, stable isotope |
Agrovoc keywords: | Language Value URI English plant soil relations http://aims.fao.org/aos/agrovoc/c_16146 English soil fauna http://aims.fao.org/aos/agrovoc/c_7169 English carbon cycle http://aims.fao.org/aos/agrovoc/c_17299 English grassland management http://aims.fao.org/aos/agrovoc/c_3364 English isotope labelling http://aims.fao.org/aos/agrovoc/c_3971 English nitrogen cycle http://aims.fao.org/aos/agrovoc/c_27938 |
Subjects: | Soil > Soil quality > Soil biology Environmental aspects > Biodiversity and ecosystem services Farming Systems > Farm nutrient management |
Research affiliation: | France > FiBL France UK > Other organizations |
ISSN: | 2041-1723 |
DOI: | 10.1038/s41467-022-34449-5 |
Deposited By: | Chomel, Dr Mathilde |
ID Code: | 44699 |
Deposited On: | 06 Dec 2022 08:49 |
Last Modified: | 06 Dec 2022 08:49 |
Document Language: | English |
Status: | Published |
Refereed: | Peer-reviewed and accepted |
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