Functional diversity and soil nutrients regulate the interannual variability in gross primary productivity
Yan, Pu (Chinese Academy of Science. Institute of Geographic Sciences and Natural Resources Research)
Zhang, Jiahui (Chinese Academy of Science. Institute of Geographic Sciences and Natural Resources Research)
He, Nianpeng (Chinese Academy of Science. Institute of Geographic Sciences and Natural Resources Research)
Zhang, Weikang (Chinese Academy of Science. Institute of Geographic Sciences and Natural Resources Research)
Liu, Congcong (Chinese Academy of Science. Institute of Geographic Sciences and Natural Resources Research)
Fernández-Martínez, Marcos (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2023
Resum:	Global change, encompassing rising temperatures and an increase in extreme precipitation events, has influenced vegetation photosynthesis; this can be seen in the gross primary productivity (GPP) of terrestrial ecosystems, which, over time affects the global carbon cycle. The impact of climate on interannual variability in GPP (GPPIAV) has been extensively explored in the literature. Other changing factors driven by global change, such as biodiversity and soil nutrient availability, are vital in predicting the future of the biosphere. However, the roles of these factors remain unclear. - We combined (i) data from 454 community plots collected using standard protocols from 2013 to 2019 across China, (ii) plant trait data and phylogenetic information of more than 2500 plant species, and (iii) soil nutrient data that we measured. Using these data from 72 "real-world" ecosystems located across a range of environmental conditions and species pools, we investigated the role of environmental factors including temperature, precipitation and soil nutrients and multifaceted diversity (i. e. species richness, hypervolume-based functional diversity, and phylogenetic diversity) in mediating the magnitude of GPPIAV using multi-model averaging and structural equation modelling. - We found that soil nutrients and functional diversity are the main determinants of the magnitude of GPPIAV and that climate effects are predominantly mediated by multifaceted diversity. - Synthesis. We provide strong evidence that ecosystems with higher biodiversity have less variable annual biomass production and decrease the extent of GPPIAV through compensatory effects across diverse ecosystems. Nutrient-rich ecosystems are likely to buffer the impact of climate variability on ecosystem carbon uptake better than nutrient-poor ecosystems. Our results demonstrate that biodiversity plays a crucial role in buffering the effects of environmental variability on carbon uptake in terrestrial ecosystems.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Biodiversity ; Climate change ; Compensatory effect ; Gross primary productivity ; Hypervolume ; Interannual variation ; Soil nutrients
Publicat a:	Journal of Ecology, Vol. 111, issue 5 (May 2023) , p. 1094-1106, ISSN 1365-2745

DOI: 10.1111/1365-2745.14082

Disponible a partir de: 2024-05-30 Postprint

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