中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 植物研究所
  3. 中国科学院植物研究所
  4. 植被与环境变化国家重点实验室
Patterns and thresholds of grazing-induced changes in community structure and ecosystem functioning: species-level responses and the critical role of species traits

文献类型：期刊论文

作者Li, Wenhuai; Xu, Fengwei2; Zheng, Shuxia; Taube, Friedhelm3; Bai, Yongfei
刊名JOURNAL OF APPLIED ECOLOGY
出版日期2017
卷号54期号:3页码:963-975
关键词ecological threshold ecosystem function grassland management grazing intensity leaf nitrogen content plant functional traits plant strategy semi-arid regions specific leaf area topographic location
ISSN号0021-8901
DOI10.1007/s11099-016-0661-4
文献子类Article
英文摘要1. Overgrazing has resulted in widespread decline in biodiversity and ecosystem functioning in grasslands world-wide in recent decades. However, few studies have examined the patterns and thresholds of grazing-induced changes in community structure and ecosystem functioning along a grazing gradient and based on species-level responses and plant functional traits. 2. To identify the thresholds of grazing intensity (GI) at both species and community levels, we conducted a grazing manipulation experiment with seven levels of GI (0-9 sheep ha(-1)) and two topographies (flat vs. slope) in a typical steppe. Four plant functional traits were measured, including specific leaf area (SLA), plant height, leaf nitrogen content (LNC) and stem: leaf ratio. 3. The threshold of GI that significantly altered community composition was at 3.75 sheep ha(-1) for the flat system and 3.0 sheep ha(-1) for the slope system. For both flat and slope systems, the threshold GI for changes in primary productivity was at 3.0 sheep ha(-1), beyond which the productivity decreased substantially. 4. At the species level, the abundances of common species, most of which are perennial grasses, declined at moderate grazing intensities (3.0-4.5 sheep ha(-1)). The abundances of most rare species, which are perennial forbs, declined at low grazing intensities (1.5-3 .0 sheep ha(-1)). SLA and LNC are good predictors of species-level responses to grazing. Low SLA and high LNC species are negatively affected by high GI, while high SLA and low LNC species are little affected by grazing. The negative effect of GI on species' abundance was greater in the slope system than in the flat system. 5. Synthesis and applications. Our results indicate that the structural and functioning thresholds of grazing intensity depend on plant traits and species composition, which is mediated by topographic location. These findings, integrating plant functional traits and threshold approaches, have important implications for determining sustainable grazing intensity in grassland management and biodiversity conservation in semi-arid regions.
学科主题Plant Sciences
出版地HOBOKEN
电子版国际标准刊号1365-2664
WOS关键词INNER-MONGOLIA ; PLANT TRAITS ; ECOLOGICAL THRESHOLDS ; GRASSLAND ECOSYSTEM ; SEMIARID GRASSLAND ; STEPPE ; MANAGEMENT ; DIVERSITY ; VEGETATION ; BIODIVERSITY
语种英语
WOS记录号WOS:000399249800008
出版者WILEY
资助机构State Key Research and Development Program of China [2016YFC0500804] ; Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31320103916] ; Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDA05050400]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/22263]  
专题植被与环境变化国家重点实验室
作者单位1.Univ Kiel, Inst Crop Sci & Plant Breeding, Grass & Forage Sci Organ Agr, Hermann Rodewald Str 9, D-24118 Kiel, Germany
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Li, Wenhuai,Xu, Fengwei,Zheng, Shuxia,et al. Patterns and thresholds of grazing-induced changes in community structure and ecosystem functioning: species-level responses and the critical role of species traits[J]. JOURNAL OF APPLIED ECOLOGY,2017,54(3):963-975.
APA Li, Wenhuai,Xu, Fengwei,Zheng, Shuxia,Taube, Friedhelm,&Bai, Yongfei.(2017).Patterns and thresholds of grazing-induced changes in community structure and ecosystem functioning: species-level responses and the critical role of species traits.JOURNAL OF APPLIED ECOLOGY,54(3),963-975.
MLA Li, Wenhuai,et al."Patterns and thresholds of grazing-induced changes in community structure and ecosystem functioning: species-level responses and the critical role of species traits".JOURNAL OF APPLIED ECOLOGY 54.3(2017):963-975.

入库方式： OAI收割

来源：植物研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。