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Alleviation of light limitation increases plant diversity and ecosystem carbon sequestration under nitrogen enrichment in an alpine meadow

文献类型：期刊论文

作者Ma, Fangfang1,2; Zhang, Fangyue1,2; Quan, Quan1,2; Wang, Jinsong1; Chen, Weinan1,2; Wang, Bingxue1; Zhou, Qingping3; Niu, Shuli1,2
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2021-03-15
卷号298页码:9
关键词Ecosystem C sequestration Grassland management Light limitation Litter manipulation N addition Species turnover
ISSN号0168-1923
DOI10.1016/j.agrformet.2020.108269
通讯作者Niu, Shuli(sniu@igsnrr.ac.cn)
英文摘要Global nitrogen (N) deposition generally reduces plant biodiversity and changes ecosystem carbon (C) cycle. Light limitation caused by accumulated litter under N enrichment is proposed as a main reason for the decreases of biodiversity and ecosystem C sequestration. However, mechanisms underlying this light limitation effect are not well understood, especially under different N input rates. We conducted a field manipulation experiment with N addition as the primary factor nested with litter manipulation as the secondary factor in an alpine meadow in 2017, measured ecosystem C fluxes and investigated the plant communities about 10 days after the N addition treatment, to examine the responses of biodiversity and ecosystem C sequestration to litter manipulation and N addition. Our results showed that alleviation of light limitation by removing litter increased plant species richness under N enrichment, which principally caused by higher species gains and lower losses. Common and rare species contributed most of the increased species as light limitation was relieved. N addition had no significant impact on net ecosystem productivity (NEP), whereas alleviation of light limitation and the subsequent increase in plant coverage and density under N enrichment stimulated gross primary productivity (GPP) but did not affect ecosystem respiration (ER), causing positive responses of NEP. This study highlights the promoting effect of the enhanced light availability through litter removal on species diversity and ecosystem C sequestration under N enrichment. These findings provide new insights into the mechanisms underlying light limitation influence on biodiversity and ecosystem C sequestration under N enrichment. We suggest that grassland management by removing the accumulated litter is an adaptive way to enhance light availability, mitigate diversity loss and thus increase C sequestration under eutrophication.
WOS关键词NUTRIENT ADDITION ; BIODIVERSITY LOSS ; SPECIES RICHNESS ; RESPONSES ; LITTER ; GRASSLAND ; FLUXES ; WATER ; COMPETITION ; DEPOSITION
资助项目National Natural Science Foundation of China[31625006] ; National Natural Science Foundation of China[31988102] ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program[2019QZKK0302]
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000610797100002
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research (STEP) program
源URL[http://ir.igsnrr.ac.cn/handle/311030/160601]  
专题中国科学院地理科学与资源研究所
通讯作者Niu, Shuli
作者单位1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Dept Resources & Environm, Beijing 100049, Peoples R China
3.Southwest Minzu Univ, Inst Qinghai Tibetan Plateau, Chengdu 610041, Peoples R China
推荐引用方式
GB/T 7714		 Ma, Fangfang,Zhang, Fangyue,Quan, Quan,et al. Alleviation of light limitation increases plant diversity and ecosystem carbon sequestration under nitrogen enrichment in an alpine meadow[J]. AGRICULTURAL AND FOREST METEOROLOGY,2021,298:9.
APA Ma, Fangfang.,Zhang, Fangyue.,Quan, Quan.,Wang, Jinsong.,Chen, Weinan.,...&Niu, Shuli.(2021).Alleviation of light limitation increases plant diversity and ecosystem carbon sequestration under nitrogen enrichment in an alpine meadow.AGRICULTURAL AND FOREST METEOROLOGY,298,9.
MLA Ma, Fangfang,et al."Alleviation of light limitation increases plant diversity and ecosystem carbon sequestration under nitrogen enrichment in an alpine meadow".AGRICULTURAL AND FOREST METEOROLOGY 298(2021):9.

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来源：地理科学与资源研究所

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