Legacy effect of grazing intensity mediates the bottom-up controls of resource addition on soil food webs

doi:10.1111/1365-2664.13825

	Legacy effect of grazing intensity mediates the bottom-up controls of resource addition on soil food webs
	Wang, Bing 1,2; Wu, Ying 2,3,4; Chen, Dima 2,3; Hu, Shuijin 5; Bai, Yongfei1
	2021
发表期刊	JOURNAL OF APPLIED ECOLOGY
ISSN	0021-8901
卷号	58 期号:5 页码:976-987
摘要	Large-scale studies have demonstrated that nitrogen (N) and water (W) availabilities greatly affect terrestrial ecosystems world-wide, and this is especially true for the resource-poor semi-arid grasslands. Yet, experimental evidence is lacking for how N and W availabilities affect soil food webs across historical grazing intensity-altered environments at a local scale. Here, we included N- and W-addition treatments in an 8-year grazing experiment (with four grazing intensities) to determine how the legacy effects of grazing intensity mediate the responses of key components of soil food webs (plants, micro-organisms and nematodes) to resource addition in a semi-arid grassland. After 4 years of N- and W-addition treatments (with no grazing during that 4-year period), we found that a legacy of grazing, even light grazing, had significant negative effects on the components of plant community and soil food webs. Both N and W addition increased above- and below-ground plant biomass, especially under moderate and heavy grazing. N addition had negative effects on the biomass of bacteria under no grazing, while W addition increased the biomass of actinomycetes under light grazing. N addition decreased the abundance of omnivorous + carnivorous nematodes under light and heavy grazing, while W addition increased their abundance under heavy grazing. Overall, the effects of resource addition on soil food webs progressively decreased from the lowest trophic level (primary producers, i.e. plants), to intermediate trophic levels (micro-organisms and root-feeding nematodes), to higher trophic levels (microbial-feeding nematodes and omnivorous + carnivorous nematodes). Synthesis and applications. Our results, which are the first data concerning the effects of resource addition on key components of soil food webs across a historical grazing-induced environmental gradient, show that the strong bottom-up controls of resource addition on soil food webs are mediated by the legacy of grazing intensity. These findings should be useful for predicting the responses of grassland ecosystems to future climate change and suggest that the recovery of degraded grasslands will require more than restoration measure of resource inputs alone.
关键词	bottom-up effect environmental context functional groups grazing intensities historical grazing resource addition semi-arid grasslands soil food webs
学科领域	Biodiversity Conservation ; Ecology
DOI	10.1111/1365-2664.13825
收录类别	SCI
语种	英语
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000607718700001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2664
资助机构	National Natural Science Foundation of China [31570450, 31630010] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences [2015061] ; Chinese National Key Development Program for Basic Research [2016YFC0500804]
作者邮箱	chendima@ctgu.edu.cn
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/26524
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.China Three Gorges Univ, Engn Res Ctr Ecoenvironm Three Gorges Reservoir R, Minist Educ, Yichang, Peoples R China 4.China Three Gorges Univ, Hubei Int Sci & Technol Ctr Ecol Conservat & Mana, Yichang, Peoples R China 5.Yunnan Univ, Yunnan Key Lab Plant Reprod Adapt & Evolutionary, Kunming, Yunnan, Peoples R China 6.North Carolina State Univ, Dept Entomol & Plant Pathol, Raleigh, NC 27695 USA
推荐引用方式 GB/T 7714	Wang, Bing,Wu, Ying,Chen, Dima,et al. Legacy effect of grazing intensity mediates the bottom-up controls of resource addition on soil food webs[J]. JOURNAL OF APPLIED ECOLOGY,2021,58(5):976-987.
APA	Wang, Bing,Wu, Ying,Chen, Dima,Hu, Shuijin,&Bai, Yongfei.(2021).Legacy effect of grazing intensity mediates the bottom-up controls of resource addition on soil food webs.JOURNAL OF APPLIED ECOLOGY,58(5),976-987.
MLA	Wang, Bing,et al."Legacy effect of grazing intensity mediates the bottom-up controls of resource addition on soil food webs".JOURNAL OF APPLIED ECOLOGY 58.5(2021):976-987.

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