Arid
DOI10.1111/j.1654-1103.2009.01067.x
Positive effects of shrubs on herbaceous species richness across several spatial scales: evidence from the semiarid Andean subtropics
Lopez, Ramiro Pablo1,2; Larrea-Alcazar, Daniel M.1; Teresa, Ortuno2,3
通讯作者Lopez, Ramiro Pablo
来源期刊JOURNAL OF VEGETATION SCIENCE
ISSN1100-9233
EISSN1654-1103
出版年2009
卷号20期号:4页码:728-734
英文摘要

Question


What is the effect of shrubs on herbaceous species richness at three spatial scales: quadrat, site, and region?


Location


Prepuna, subtropical semi-arid Andes.


Methods


At eight sites, we recorded the presence of herbaceous species in spaces beneath shrubs/small trees and in open areas. At the quadrat scale, the average species number per quadrat was calculated and compared between the two microhabitats (shrubs/open). At the local (site) scale, all quadrats of each site were pooled according to microhabitat, and all sites were then combined for the regional analysis.


Results and conclusions


We found greater herbaceous species richness below shrubs at all three spatial scales considered. Several species were found exclusively associated with the shrub undercanopy. This effect seems to depend more on greater inventory diversity at the different scales than on greater differentiation diversity in the herbaceous communities associated with shrubs. Facilitation seems to be responsible for the increase of species richness beneath shrubs, but further experimental study is needed to obtain insight into the underlying mechanisms.


英文关键词Arid and semiarid regions Facilitation Herbaceous species richness Shrubs Small trees Spatial scale
类型Article
语种英语
国家Bolivia
收录类别SCI-E
WOS记录号WOS:000267755000016
WOS关键词NURSE-PLANTS ; ARID ECOSYSTEM ; CUSHION PLANT ; FACILITATION ; COMMUNITIES ; VEGETATION ; DYNAMICS ; GRADIENT ; STRESS ; DESERT
WOS类目Plant Sciences ; Ecology ; Forestry
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/161830
作者单位1.Univ Mayor San Andres, Inst Ecol, Ctr Anal Espacial, La Paz, Bolivia;
2.Herbario Nacl Bolivia, La Paz, Bolivia;
3.Museo Nacl Hist Nat, La Paz, Bolivia
推荐引用方式
GB/T 7714
Lopez, Ramiro Pablo,Larrea-Alcazar, Daniel M.,Teresa, Ortuno. Positive effects of shrubs on herbaceous species richness across several spatial scales: evidence from the semiarid Andean subtropics[J],2009,20(4):728-734.
APA Lopez, Ramiro Pablo,Larrea-Alcazar, Daniel M.,&Teresa, Ortuno.(2009).Positive effects of shrubs on herbaceous species richness across several spatial scales: evidence from the semiarid Andean subtropics.JOURNAL OF VEGETATION SCIENCE,20(4),728-734.
MLA Lopez, Ramiro Pablo,et al."Positive effects of shrubs on herbaceous species richness across several spatial scales: evidence from the semiarid Andean subtropics".JOURNAL OF VEGETATION SCIENCE 20.4(2009):728-734.
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