Changes in soil faunal density and microbial community under altered litter input in forests and grasslands  

作　　者：Xinyu Wei Fuzhong Wu Petr Heděnec Kai Yue Yan Peng Jing Yang Xiaoyue Zhang Xiangyin Ni 

机构地区：[1]Key Laboratory for Humid Subtropical Eco-Geographical Processes of the Ministry of Education,School of Geographical Sciences,Fujian Normal University,Fuzhou 350007,China [2]Agritec Plant Research Ltd.,Zemědělská16,Šumperk 78701,Czech Republic [3]Institute of Tropical Biodiversity and Sustainable Development,University Malaysia Terengganu,Kuala Nerus,Terengganu 21030,Malaysia

出　　处：《Fundamental Research》2022年第6期954-963,共10页自然科学基础研究（英文版）

基　　金：the National Natural Science Foundation of China(32022056,31800521,32171641,32101509,31922052,and 31800373).

摘　　要：Root and foliar litter inputs are the primary sources of carbon and nutrients for soil fauna and microorganisms,yet we still lack a quantitative assessment to evaluate the effects of root and foliar litter on various groups of soil organisms across terrestrial ecosystems.Here,we compiled 978 paired observations from 68 experimental sites to assess the directions and magnitudes of adding and removing foliar and root litter on the soil faunal density and microbial biomass that was evaluated by phospholipid fatty acids(PLFAs)across forests and grasslands worldwide.We found that litter addition had only a marginal effect on soil faunal density but significantly increased the soil total microbial-,fungal-and bacterial-PLFAs by 13%,14%,and 10%,respectively,across ecosystems,suggesting that the soil microbial community is more sensitive to carbon source addition than soil fauna,particularly in soils with low carbon to nitrogen ratios.In contrast,removing litter significantly decreased the soil faunal density by 17%but had few effects on soil microorganisms.Compared with foliar litter,root litter input had a more positive effect on the development of soil fungal taxa.The effect of both litter addition and removal on soil faunal density and microbial biomass did not differ between humid and arid regions,but a greater influence was observed in grasslands than in forests for soil microbial community.Our results highlight that the increasing litter production under a global greening scenario would stimulate microbial activity in grasslands more than in forests,and this stimulation would be greater for soil microbes than soil fauna.

关 键 词：Detritus input and removal treatment Soil fauna BACTERIA FUNGI Phospholipid fatty acids 

分 类 号：S71[农业科学—林学]