数字农科院2.0

Contemporary biodiversity pattern is affected by climatechange at multiple temporal scales in steppes on the Mongolian Plateau

文献类型： 外文期刊

作者： Li, Zijing;Li, Zhiyong;Tong, Xuze;Dong, Lei;Zheng, Ying;Zhang, Jinghui;Miao, Bailing;Wang, Lixin;Zhao, Liqing;Wen, Lu;Han, Guodong;Li, Frank Yonghong;Liang, Cunzhu

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期刊名称： BIOGEOSCIENCES

ISSN： 1726-4170

年卷期： 2023 年 20 卷 14 期

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收录情况： SCIE（2023版）

摘要： Present and historical climate conditions jointly determine contemporarybiodiversity patterns and ecosystem functions. However, it remains unclearhow contemporary climate and paleoclimate changes together affect the threedimensions of biodiversity (i.e., taxonomic diversity, functional diversityand phylogenetic diversity) and their relationship with ecosystem functions.Here, we assess the impact of current climate, paleoclimate and itsanomalies on contemporary biodiversity and ecosystem functions. We estimatedthe taxonomic, functional and phylogenetic diversity of grassland on theMongolian Plateau using vegetation survey data and trait information. Wethen used random forest and structural equation models to assess therelative importance of the present, the Mid-Holocene and the Last GlacialMaximum climate as well as paleoclimate changes as determinants of diversityand aboveground biomass. Our results showed that paleoclimate changes andmodern climate jointly determined contemporary biodiversity patterns, whilecommunity biomass was mainly affected by modern climate, namely the aridityindex. Modern aridity and temperature were two major influences on all threedimensions of biodiversity. Mid-Holocene climate anomalies had a strongeffect on species richness and phylogenetic diversity, while functionaldiversity had mainly been affected by temperature anomalies since the LastGlacial Maximum. These findings suggest that contemporary biodiversitypatterns may be affected by processes at divergent temporal scales. Ourresults show that simultaneously exploring the response of the threedimensions of biodiversity in different periods of climate change and thetheoretical framework for its impact on community biomass is helpful toprovide a more comprehensive understanding of patterns of biodiversity andits relationship with ecosystem functions.

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