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Fertilization Diversity Induces Trophic Asymmetry in Ecosystem Responses to Extreme Drought

文献类型：期刊论文

作者Wang, Haonan2,3; Chen, Huasong2,3; Wu, Liji2,3; Wang, Bing2,3; Wu, Ying2,3; Tian, Dashuan1; Chen, Dima2,3
刊名GLOBAL CHANGE BIOLOGY
出版日期2026-02-12
卷号32期号:2页码:e70750
关键词drought fertilization diversity multi-trophic communities Qinghai-Tibetan plateau trophic asymmetry
ISSN号1354-1013
DOI10.1111/gcb.70750
产权排序3
文献子类Article
英文摘要The role of fertilization diversity (the variety of nutrient types added) in modulating the effects of extreme drought on multi-trophic communities and their functions remains a critical unknown in ecology. We conducted a multi-nutrient factorial experiment (control, N, NP, and NPK additions) under simulated extreme drought in an alpine meadow on the Qinghai-Tibetan Plateau. We assessed the responses of soil abiotic properties, plant communities, soil microbial (bacteria and fungi) and nematode communities, and ecosystem multifunctionality (EMF). Our results reveal that fertilization diversity induces a trophic asymmetry in ecosystem responses to drought: increasing fertilization diversity (and total nutrient load) significantly altered the response of the plant community to drought by promoting the competitive dominance of drought-tolerant grasses, which in turn modulated ecosystem function of aboveground net primary productivity. Conversely, fertilization diversity amplified the negative effects of drought on soil bacterial and fungal biomass, likely due to exacerbating microbial carbon limitation. For soil nematodes, fertilization diversity modified the response of community composition to drought and simplified nematode communities. Consequently, despite these compensatory and contrasting responses across trophic levels, fertilization diversity led to a net decline in EMF under drought. This net loss occurred because the positive contributions from the plant pathway were decisively outweighed by the substantial suppression of microbial processes, revealing a fundamental decoupling between above- and below-ground components. Our findings demonstrate that the balance and diversity of nutrient inputs, rather than nitrogen dose alone, is a critical factor modulating ecosystem responses to drought, creating contrasting responses across trophic levels that necessitate a holistic, multi-trophic perspective for effective ecosystem management under global change.
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WOS关键词COMMUNITY COMPOSITION ; PLANT DIVERSITY ; NITROGEN ENRICHMENT ; SOIL BIODIVERSITY ; CLIMATE EXTREMES ; CARBON ; MULTIFUNCTIONALITY ; STABILITY ; BACTERIAL
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001692219600001
出版者WILEY
源URL[http://ir.igsnrr.ac.cn/handle/311030/221240]  
专题生态系统网络观测与模拟院重点实验室_外文论文
通讯作者Wang, Bing; Chen, Dima
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China
2.Inner Mongolia Univ, Sch Ecol & Environm, Inner Mongolia Key Lab Grassland Ecol, Hohhot, Peoples R China;
3.Inner Mongolia Univ, Sch Ecol & Environm, Minist Educ, Key Lab Ecol & Resource Use Mongolian Plateau, Hohhot, Peoples R China;
推荐引用方式
GB/T 7714		 Wang, Haonan,Chen, Huasong,Wu, Liji,et al. Fertilization Diversity Induces Trophic Asymmetry in Ecosystem Responses to Extreme Drought[J]. GLOBAL CHANGE BIOLOGY,2026,32(2):e70750.
APA Wang, Haonan.,Chen, Huasong.,Wu, Liji.,Wang, Bing.,Wu, Ying.,...&Chen, Dima.(2026).Fertilization Diversity Induces Trophic Asymmetry in Ecosystem Responses to Extreme Drought.GLOBAL CHANGE BIOLOGY,32(2),e70750.
MLA Wang, Haonan,et al."Fertilization Diversity Induces Trophic Asymmetry in Ecosystem Responses to Extreme Drought".GLOBAL CHANGE BIOLOGY 32.2(2026):e70750.

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来源：地理科学与资源研究所

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