Arid
DOI10.1016/j.jaridenv.2006.10.016
Discriminating direct and indirect effects of exotic grazers on native plant cover in the Monte desert of Argentina
Tadey, M.; Farji-Brener, A. G.
通讯作者Farji-Brener, A. G.
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
EISSN1095-922X
出版年2007
卷号69期号:3页码:526-536
英文摘要

The relationship between exotic mammalian herbivores (EMH) and the native vegetation has often been focused on direct effects and viewed it as binary interactions. However, in arid environments indirect effects and the community context may also influence the effect of EMH on plants. We sampled the flora and soil nutrients (SN) in seven paddocks that differed in stocking rates, and used structural equation modeling (SEM) to partition the net effect of EMH into direct and indirect effects on the most abundant plant species of the Monte desert of Argentina. We proposed two indirect effects by which EMH can modify the cover of a focal plant species: the modification of the assemblage plant cover (APC) and alteration of SN. Indirect effects appear to be as important as direct ones. EMH did not affect the status of SN; thus indirect effects through this pathway were irrelevant. Conversely, EMH always affected the APC negatively, but the effect of APC on a focal plant varied according to their identity. Therefore, indirect effects through the APC were positive or negative depending on plant species. Several possible mechanisms explaining how changes in the cover of nearby plants can alter the cover of a focal plant species are discussed. These results emphasize the importance of indirect interactions to explain the complex relationship between EMH and native plant cover in arid ecosystems. (c) 2006 Elsevier Ltd. All rights reserved.


英文关键词indirect interactions livestock structural equation models Patagonia
类型Article
语种英语
国家Argentina
收录类别SCI-E
WOS记录号WOS:000245349300013
WOS关键词COMMUNITIES ; DYNAMICS ; HERBIVORES ; NUTRIENT ; SELECTIVITY ; COMPETITION ; VEGETATION ; RANGELANDS ; GRADIENTS ; ABUNDANCE
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/154777
作者单位(1)Univ Nacl Comahue, CRUB, Lab Ecotono, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina
推荐引用方式
GB/T 7714
Tadey, M.,Farji-Brener, A. G.. Discriminating direct and indirect effects of exotic grazers on native plant cover in the Monte desert of Argentina[J],2007,69(3):526-536.
APA Tadey, M.,&Farji-Brener, A. G..(2007).Discriminating direct and indirect effects of exotic grazers on native plant cover in the Monte desert of Argentina.JOURNAL OF ARID ENVIRONMENTS,69(3),526-536.
MLA Tadey, M.,et al."Discriminating direct and indirect effects of exotic grazers on native plant cover in the Monte desert of Argentina".JOURNAL OF ARID ENVIRONMENTS 69.3(2007):526-536.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Tadey, M.]的文章
[Farji-Brener, A. G.]的文章
百度学术
百度学术中相似的文章
[Tadey, M.]的文章
[Farji-Brener, A. G.]的文章
必应学术
必应学术中相似的文章
[Tadey, M.]的文章
[Farji-Brener, A. G.]的文章
相关权益政策
暂无数据
收藏/分享

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。