Effect of land use on soil nematode community composition and co-occurrence network relationship

Xiaotong Liu ¹Siwei Liang ²Yijia Tian ¹Xiao Wang ¹Wenju Liang ³Xiaoke Zhang³

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作者信息

1. Institute of Applied Ecology.Chinese Academy of Sciences,Shenyang 110016,China;University of Chinese Academy of Sciences,Beijing 100049,China
2. Tillage and Cultivation Research Institute,Liaoning Academy of Agricultural Sciences,Shenyang 110161,China
3. Institute of Applied Ecology.Chinese Academy of Sciences,Shenyang 110016,China;Key Lab of Conservation Tillage and Ecological Agriculture in Liaoning Province,Shenyang 110016,China
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Abstract

Land use influences soil biota community composition and diversity,and then belowground ecosystem processes and functions.To characterize the effect of land use on soil biota,soil nematode communities in crop land,forest land and fallow land were investigated in six regions of northern China.Generic richness,diversity,abundance and biomass of soil nematodes was the lowest in crop land.The richness and diversity of soil nematodes were 28.8 and 15.1％higher in fallow land than in crop land,respectively.No significant differences in soil nematode indices were found between forest land and fallow land,but their network keystone genera composition was different.Among the keystone genera,50％of forest land genera were omnivores-predators and 36％of fallow land genera were bacterivores.The proportion of fungivores in forest land was 20.8％lower than in fallow land.The network complexity and the stability were lower in crop land than forest land and fallow land.Soil pH,NH4+-N and NO3--N were the major factors influencing the soil nematode community in crop land while soil organic carbon and moisture were the major factors in forest land.Soil nematode communities in crop land influenced by artificial management practices were more dependent on the soil environment than communities in forest land and fallow land.Land use induced soil environment variation and altered network relationships by influencing trophic group proportions among keystone nematode genera.

Key words

soil nematode/trophic groups/community composition/co-occurrence network/land use

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基金项目

National Natural Science Foundation of China(U22A20501)

National Key Research and Development Plan of China(2022YFD1500601)

National Science and Technology Fundamental Resources Investigation Program of China(2018FY100304)

Strategic Priority Research Program of the Chinese Academy of Sciences(XDA28090200)

Liaoning Province Applied Basic Research Plan Program,China(2022JH2/101300184)

Shenyang Science and Technology Plan Program,China(21-109-3-05)

Liaoning Outstanding Innovation Team,China(XLYC2008015)

出版年

2024

农业科学学报(英文)

中国农业科学院农业信息研究所

农业科学学报(英文)

CSTPCD

影响因子：0.576

ISSN：2095-3119

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