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Precipitation regulated soil nematode community and footprint in cropland ecosystems

Soil Ecology Letters 2023年第4期5卷 19-28页

作者： Pingting Guan Jianan Li Cao Hao Jingjing Yang Lihong Song Ximei Niu Ping Wang Mohammad Mahamood Donghui Wu State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration School of EnvironmentNortheast Normal UniversityChangchun 130117China Key Laboratory of Vegetation Ecology Ministry of EducationNortheast Normal UniversityChangchun 130024China College of Agriculture Guizhou UniversityGuiyang 550025China Department of Biology Deanship of Educational ServicesQassim UniversityBuraydahSaudi Arabia Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization Northeast Normal UniversityChangchun 130117China Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China

●Nematode abundance and footprint show unimodal patterns with precipitation levels.●MAP governed nematode diversity along the precipitation gradient of agroecosystem.●Soil pH determined nematode abundance and footprint in low precipitation *** plays a crucial role in global biodiversity change across terrestrial *** is proven to affect soil organism diversity in natural ***,how precipitation change affects the function of the soil nematode community remains unclear in cropland ***,we tested soil nematode communities from different precipitation sites(300 mm to 900 mm)of the agricultural *** abundance of total nematodes,fungivores,and plant parasites,together with the footprint of fungivores was significantly affected by mean annual precipitation(MAP)in cropland *** parasites diversity and footprint showed negative relationships with *** random forest suggested plant parasite footprint was the most responsive to *** structural equation model revealed that MAP affected nematode abundance and footprint indirectly via soil pH;nematode diversity was affected by MAP *** conclude that precipitation could act as the main selection stress for nematode diversity among the large gradient of agricultural ***,the soil pH may act as a stress factor in determining nematode community and carbon flow in the soil food *** study emphasized that using nematode value by trophic group would provide a deep understanding of nematode response to precipitation in cropland ecosystems.

关键词： soil nematode community nematode carbon flux the northeast china transect agricultural ecosystem precipitation

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