Arid
DOI10.1016/j.jaridenv.2006.03.019
Seedling recruitment in a semi-arid steppe: The role of microsite and post-dispersal seed predation
Barbera, G. G.; Navarro-Cano, J. A.; Castillo, V. M.
通讯作者Navarro-Cano, J. A.
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
EISSN1095-922X
出版年2006
卷号67期号:4页码:701-714
英文摘要

Grasslands dominated by Stipa tenacissima are important ecosystems in the arid and semiarid climates of western Mediterranean, where they have originated by degradation of open dry forests and shrublands. At present, although the level of exploitation in these ecosystems is very low, succession processes seem to have stopped. In this study, we explore the role of microsite and post-dispersal seed predation on the seedling emergence of two species from advanced successional stages (Rhamnus lycioides, Quercus coccifera), three species from degraded stages (Cistus clusii, Helianthemum violaceum, Anthyllis terniflora), and of the dominant species (Stipa tenacissima). Seeds of these species were sown in plots divided into two microsites: (i) under tussocks of S. tenacissima and (ii) in the bare soil between tussocks. Soil moisture was significantly higher in the tussock microsites. The interaction observed between microsite and time, reflected the slower drying process under tussocks. Seed predation was in general high and differed significantly between species but not between microsites. Q. coccifera was especially affected by predation. The only germination detected in gap areas was that of H. violaceum. The results pointed to a direct facilitative effect of tussock grass on the germination in R. lycioides (20.4 +/- 8.0%) and S. tenacissima (41.3 +/- 5.7%) while the corresponding figures for bare ground were 0%. These results suggest that the recovery of potential vegetation in this ecosystem is not possible or, at least, is very slow because the residual shrub patches do not generate a sufficient number of seeds able to disperse to favorable germination microsites. S. tenacissima may act as facilitator of seedling recruitment if there is a supply of diaspores. (c) 2006 Elsevier Ltd. All rights reserved.


英文关键词facilitation germination Rhamnus lycioides seed predation southeastern Spain Stipa tenacissima vegetation restoration
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000242159500013
WOS关键词STIPA-TENACISSIMA L. ; RAIN-FOREST TREE ; SECONDARY DISPERSAL ; ESTABLISHMENT ; GERMINATION ; AVAILABILITY ; REMOVAL ; ANTS ; OAK ; PATTERNS
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/2XILL650/151999
作者单位(1)CSIC, CEBAS, Soil & Water Conservat Dept, Murcia 30100, Spain
推荐引用方式
GB/T 7714
Barbera, G. G.,Navarro-Cano, J. A.,Castillo, V. M.. Seedling recruitment in a semi-arid steppe: The role of microsite and post-dispersal seed predation[J],2006,67(4):701-714.
APA Barbera, G. G.,Navarro-Cano, J. A.,&Castillo, V. M..(2006).Seedling recruitment in a semi-arid steppe: The role of microsite and post-dispersal seed predation.JOURNAL OF ARID ENVIRONMENTS,67(4),701-714.
MLA Barbera, G. G.,et al."Seedling recruitment in a semi-arid steppe: The role of microsite and post-dispersal seed predation".JOURNAL OF ARID ENVIRONMENTS 67.4(2006):701-714.
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