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Abundance- and functional-based mechanisms of plant diversity loss with fertilization in the presence and absence of herbivores
Yang, Zhongling1,2; Hautier, Yann3,4; Borer, Elizabeth T.4; Zhang, Chunhui5; Du, Guozhen1
2015-09-01
发表期刊OECOLOGIA
卷号179期号:1页码:261-270
文章类型Article
摘要Nutrient supply and herbivores can regulate plant species composition, biodiversity and functioning of terrestrial ecosystems. Nutrient enrichment frequently increases plant productivity and decreases diversity while herbivores tend to maintain plant diversity in productive systems. However, the mechanisms by which nutrient enrichment and herbivores regulate plant diversity remain unclear. Abundance-based mechanisms propose that fertilization leads to the extinction of rare species due to random loss of individuals of all species. In contrast, functional-based mechanisms propose that species exclusion is based on functional traits which are disadvantageous under fertilized conditions. We tested mechanistic links between fertilization and diversity loss in the presence or absence of consumers using data from a 4-year fertilization and fencing experiment in an alpine meadow. We found that both abundance- and functional-based mechanisms simultaneously affected species loss in the absence of herbivores while only abundance-based mechanisms affected species loss in the presence of herbivores. Our results indicate that an abundance-based mechanism may consistently play a role in the loss of plant diversity with fertilization, and that diversity decline is driven primarily by the loss of rare species regardless of a plant's functional traits and whether or not herbivores are present. Increasing efforts to conserve rare species in the context of ecosystem eutrophication is a central challenge for grazed grassland ecosystems.; Nutrient supply and herbivores can regulate plant species composition, biodiversity and functioning of terrestrial ecosystems. Nutrient enrichment frequently increases plant productivity and decreases diversity while herbivores tend to maintain plant diversity in productive systems. However, the mechanisms by which nutrient enrichment and herbivores regulate plant diversity remain unclear. Abundance-based mechanisms propose that fertilization leads to the extinction of rare species due to random loss of individuals of all species. In contrast, functional-based mechanisms propose that species exclusion is based on functional traits which are disadvantageous under fertilized conditions. We tested mechanistic links between fertilization and diversity loss in the presence or absence of consumers using data from a 4-year fertilization and fencing experiment in an alpine meadow. We found that both abundance- and functional-based mechanisms simultaneously affected species loss in the absence of herbivores while only abundance-based mechanisms affected species loss in the presence of herbivores. Our results indicate that an abundance-based mechanism may consistently play a role in the loss of plant diversity with fertilization, and that diversity decline is driven primarily by the loss of rare species regardless of a plant's functional traits and whether or not herbivores are present. Increasing efforts to conserve rare species in the context of ecosystem eutrophication is a central challenge for grazed grassland ecosystems.
关键词Alpine Meadow Community Composition Competition Functional Traits Rare Species
WOS标题词Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]SPECIES RICHNESS ; ECOSYSTEM RESPONSES ; RESOURCE CONTROL ; NITROGEN-CYCLE ; ALPINE MEADOW ; BIODIVERSITY ; TRAITS ; COMPETITION ; GRASSLAND ; COMMUNITY
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Ecology
WOS记录号WOS:000360547000022
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://210.75.249.4/handle/363003/5518
专题中国科学院西北高原生物研究所
作者单位1.Lanzhou Univ, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Peoples R China
2.Henan Univ, State Key Lab Cotton Biol, Key Lab Plant Stress Biol, Coll Life Sci, Kaifeng 475004, Henan, Peoples R China
3.Univ Oxford, Dept Plant Sci, Oxford OX1 3RB, England
4.Univ Utrecht, Dept Biol, Ecol & Biodivers, NL-3584 CH Utrecht, Netherlands
5.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Qinghai, Peoples R China
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GB/T 7714
Yang, Zhongling,Hautier, Yann,Borer, Elizabeth T.,et al. Abundance- and functional-based mechanisms of plant diversity loss with fertilization in the presence and absence of herbivores[J]. OECOLOGIA,2015,179(1):261-270.
APA Yang, Zhongling,Hautier, Yann,Borer, Elizabeth T.,Zhang, Chunhui,&Du, Guozhen.(2015).Abundance- and functional-based mechanisms of plant diversity loss with fertilization in the presence and absence of herbivores.OECOLOGIA,179(1),261-270.
MLA Yang, Zhongling,et al."Abundance- and functional-based mechanisms of plant diversity loss with fertilization in the presence and absence of herbivores".OECOLOGIA 179.1(2015):261-270.
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