Species asynchrony stabilises productivity under extreme drought across Northern China grasslands,Journal of Ecology

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Species asynchrony stabilises productivity under extreme drought across Northern China grasslands
Journal of Ecology ( IF 5.3 ) Pub Date : 2021-01-10 , DOI: 10.1111/1365-2745.13587
Taofeek O. Muraina _{1,

2} , Chong Xu ₁ , Qiang Yu ₁ , Yadong Yang ₁ , Minghui Jing ₁ , Xiaotong Jia ₁ , Md. Shahariar Jaman _{1,

3} , Quockhanh Dam ₁ , Alan K. Knapp _{4,

5} , Scott L. Collins ₆ , Yiqi Luo ₇ , Wentao Luo ₈ , Xiaoan Zuo ₉ , Xiaoping Xin ₁ , Xingguo Han ₁₀ , Melinda D. Smith _{4,

5}

Affiliation

National Hulunber Grassland Ecosystem Observation and Research Station Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing 10008 China
Department of Animal Health and Production Oyo State College of Agriculture and Technology P.M.B. 10 Igbo‐Ora, Oyo State Nigeria
Department of Agroforestry and Environmental Science Sher‐e‐Bangla Agricultural University Dhaka Bangladesh
Department of Biology Graduate Degree Program in Ecology Colorado State University Fort Collins CO 80523 USA
Graduate Degree Program in Ecology Colorado State University Fort Collins CO 80523 USA
Department of Biology University of New Mexico Albuquerque NM 87131 USA
Center for Ecosystem Science and Society (ECOSS) Department of Biological Sciences Northern Arizona University Flagstaff AZ 86011 USA
Erguna Forest‐Steppe Ecotone Research Station Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110164 China
Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China
State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing 100093 China

Biodiversity can stabilise productivity through different mechanisms, such as asynchronous species responses to environmental variability and species stability. Global changes, like intensified drought, could negatively affect species richness, species asynchrony and species stability, but it is unclear how changes in these mechanisms will affect the stability of above‐ground primary productivity (ANPP) across ecosystems.
We studied the effects of a 4‐year extreme drought on ANPP stability and the underlying mechanisms (species richness, species asynchrony and species stability) across six grasslands in Northern China. We also assessed the relative importance of these mechanisms in determining ANPP stability under extreme drought.
We found that extreme drought decreased ANPP stability, species richness, species asynchrony and species stability across the six grasslands. However, structural equation modelling revealed that species asynchrony, not species richness or species stability, was the most important mechanism promoting stability of ANPP, regardless of drought across the six grasslands.
Synthesis. Our results suggest that species asynchrony, not species richness and species stability, consistently buffers ecosystem stability against extreme drought across and within grasslands spanning a broad precipitation gradient. Thus, species asynchrony may be a more general mechanism for promoting stability of ANPP in grasslands in the face of intensified drought.

更新日期：2021-01-10

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