Arid
DOI10.1098/rsbl.2004.0181
Do positive interactions increase with abiotic stress? - A test from a semi-arid steppe
Maestre, FT; Cortina, J
通讯作者Maestre, FT
来源期刊PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
ISSN0962-8452
出版年2004
卷号271页码:S331-S333
英文摘要

Theoretical models predict that the relative importance of facilitation and competition may vary inversely across gradients of abiotic stress. However, these predictions have not been thoroughly tested in the field, especially in semi-arid environments. In this study, we evaluated how the net effect of the tussock grass Stipa tenacissima on the shrub Pistacia lentiscus varied across a gradient of abiotic stress in semi-arid Mediterranean steppes. We fitted the relationship between accumulated rainfall and the relative neighbour index (our measures of abiotic stress and of the net effect of S. tenacissima on P. lentiscus, respectively), which varied across this gradient, to a quadratic model. Competitive interactions dominated at both extremes of the gradient. Our results do not support established theory. Instead, they suggest that a shift from facilitation to competition under high abiotic stress conditions is likely to occur when the levels of the most limiting resource are so low that the benefits provided by the facilitator cannot overcome its own resource uptake.


英文关键词facilitation competition Stipa tenacissima environmental gradient Pistacia lentiscus abiotic stress
类型Article
语种英语
国家USA ; Spain
收录类别SCI-E
WOS记录号WOS:000223099800023
WOS关键词RELATIVE IMPORTANCE ; PLANT INTERACTIONS ; STIPA-TENACISSIMA ; FACILITATION ; INTERFERENCE ; DESERT ; SHRUB ; COMMUNITIES ; DYNAMICS ; PATTERNS
WOS类目Biology ; Ecology ; Evolutionary Biology
WOS研究方向Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology ; Evolutionary Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/147920
作者单位(1)Duke Univ, Dept Biol, Durham, NC 27708 USA;(2)Univ Alicante, Dept Ecol, E-03080 Alicante, Spain
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GB/T 7714
Maestre, FT,Cortina, J. Do positive interactions increase with abiotic stress? - A test from a semi-arid steppe[J],2004,271:S331-S333.
APA Maestre, FT,&Cortina, J.(2004).Do positive interactions increase with abiotic stress? - A test from a semi-arid steppe.PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,271,S331-S333.
MLA Maestre, FT,et al."Do positive interactions increase with abiotic stress? - A test from a semi-arid steppe".PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES 271(2004):S331-S333.
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