Consequences of a severe drought on spatial patterns of woody plants in a two-phase mosaic steppe of Stipa tenacissima L

被引：41

作者：

García-Fayos, P ^{[1
]}

Gasque, M ^{[1
]}

机构：

[1] UV, CIDE, GV, CSIC, Valencia 46470, Spain

来源：

JOURNAL OF ARID ENVIRONMENTS | 2002年 / 52卷 / 02期

关键词：

spatial association; facilitation; plant mortality; semi-arid; drought; Stipa tenacissima; SE Spain;

D O I：

10.1006/jare.2002.0987

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The establishment and development of the plants of S. tenacissima L. organize a source-sink pattern of water and sediments from bare soil areas to tussocks on mountain slopes forming small terraces or terracettes upslope of tussocks. We hypothesized that terracettes enhance woody plant survival compared with woody plants on bare soil. We examined this hypothesis at three locations in south-eastern Spain after a severe drought from 1993 to 1995. The spatial association of individual plants and the pattern of plant mortality support the hypothesis that the terracettes formed by S. tenacissima tussocks facilitate woody plants. The prediction that facilitation dominates interference during stress periods such as drought was supported by mortality patterns. Drought effects alone do not explain spatial patterns of woody plants in the two-phase mosaic steppe of Stipa tenacissima. (C) 2002 Elsevier Science Ltd.

引用

页码：199 / 208

页数：10

共 34 条

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