Below-ground-mediated and phase-dependent processes drive nitrogen-evoked community changes in grasslands

doi:10.1111/1365-2745.13415

	Below-ground-mediated and phase-dependent processes drive nitrogen-evoked community changes in grasslands
	Tian, Qiuying ; Yang, Liuyi ; Ma, Pengfei ; Zhou, Huirong ; Liu, Nana 2,3; Bai, Wenming; Wang, Hong 4; Ren, Lifei ; Lu, Peng ; Hanl, Wenwu ; Schultz, Peggy A.; Bever, James D.; Zhang, Fu-Suo ; Lambers, Hans 7,8; Zhang, Wen-Hao
	2020
发表期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
卷号	108 期号:5 页码:1874-1887
摘要	Enhanced deposition of atmospheric nitrogen (N) leads to loss of plant diversity in grassland ecosystems. Numerous theories have provided potential explanations for the negative effects of N enrichment on plant diversity. However, the relative importance of each mechanism and the time-scales of responses for the different functional groups remain unclear. We investigated the temporal responses of plant community in a temperate steppe to N enrichment by linking above-ground to below-ground processes using a series of field N-addition and greenhouse experiments. The N enrichment-induced declines in plant diversity of grasslands were phase-based, functional group-dependent and driven by three below-ground processes. The rapid accumulation of NH4+-N by N addition inhibited photosynthetic rates of broad-leaf non-rhizomatous forbs, contributing to loss of these N-sensitive species during early phase of N enrichment (<= 3 years). The N-induced changes in this phase were independent of soil pH as evidenced by results from application of lime to mitigate N-evoked soil acidification. With progression of N addition, manganese (Mn) toxicity to narrow-leaf non-rhizomatous forbs due to soil acidification-induced Mn2+ mobilization in soil accounted for their loss in the second phase of N enrichment (similar to 4-9 years). When N addition proceeded longer than similar to 10 years, N enrichment stimulated below-ground meristem differentiation and rhizome growth of the rhizomatous species, leading to the dominance by rhizomatous sedges/grasses in the community at the later phase of N enrichment. Synthesis. The hierarchical mechanisms not only provide a comprehensive explanation for the N enrichment-induced diversity decline in grasslands, but can also facilitate us to understand the differential sensitivities of ecosystems to chronic N enrichment, and predict future ecosystem dynamics.
关键词	below-ground processes functional groups grassland ecosystems metal toxicity nitrogen enrichment phase-dependent species loss plant biodiversity soil acidification
学科领域	Plant Sciences ; Ecology
DOI	10.1111/1365-2745.13415
收录类别	SCI
语种	英语
WOS关键词	SPECIES RICHNESS ; PLANT DIVERSITY ; ENVIRONMENTAL HETEROGENEITY ; PHOSPHORUS LIMITATION ; ACIDIC GRASSLANDS ; DEPOSITION ; COMPETITION ; RESPONSES ; FERTILIZATION ; PRODUCTIVITY
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
WOS记录号	WOS:000536650800001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2745
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31870457, 31830011, 31570403] ; Chinese Academy of SciencesChinese Academy of Sciences [KFJ-STS-QYZD-124]
作者邮箱	whzhang@ibcas.ac.cn
作品OA属性	Green Submitted
引用统计	被引频次：32[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/2S10CLM1/21743
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, Coll Resources & Environm, Beijing, Peoples R China 3.Peking Univ, Coll Urban & Environm Sci, Inst Ecol, Beijing, Peoples R China 4.Peking Univ, Key Lab Earth Surface Proc, Minist Educ, Coll Urban & Environm Sci, Beijing, Peoples R China 5.Agr Univ Hebei, Mt Area Res Inst, Baoding, Peoples R China 6.Schultz, Peggy A.; Bever, James D.] Univ Kansas, Dept Ecol & Evolutionary Biol, Lawrence, KS 66045 USA 7.Schultz, Peggy A.; Bever, James D.] Univ Kansas, Kansas Biol Survey, Lawrence, KS 66045 USA 8.China Agr Univ, Coll Resources & Environm Sci, Key Lab Plant Soil Interact, Minist Educ, Beijing, Peoples R China 9.Univ Western Australia, Sch Biol Sci, Perth, WA, Australia
推荐引用方式 GB/T 7714	Tian, Qiuying,Yang, Liuyi,Ma, Pengfei,et al. Below-ground-mediated and phase-dependent processes drive nitrogen-evoked community changes in grasslands[J]. JOURNAL OF ECOLOGY,2020,108(5):1874-1887.
APA	Tian, Qiuying.,Yang, Liuyi.,Ma, Pengfei.,Zhou, Huirong.,Liu, Nana.,...&Zhang, Wen-Hao.(2020).Below-ground-mediated and phase-dependent processes drive nitrogen-evoked community changes in grasslands.JOURNAL OF ECOLOGY,108(5),1874-1887.
MLA	Tian, Qiuying,et al."Below-ground-mediated and phase-dependent processes drive nitrogen-evoked community changes in grasslands".JOURNAL OF ECOLOGY 108.5(2020):1874-1887.

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