NDLI: Effect of Stipa tenacissima L. on the structure of plant co-occurrence networks in a semi-arid community

Content Provider	Springer Nature Link
Author	Saiz, Hugo Alados, Concepción L.
Copyright Year	2011
Abstract	Network approaches can increase our understanding of both changes in ecosystems and the role that individual species play in such changes. In ecology, networks have been applied mainly to the study of food webs and mutualistic interactions, with few studies on plant communities. This study used a network approach to examine a semi-arid plant community along a Stipa tenacissima abundance gradient at two locations in SE Spain: (1) an open shrub land where S. tenacissima is a highly competitive species, and (2) an alpha steppe where S. tenacissima forms the end stable successional community. In alpha steppe, the influence of slope was also examined. We detected that S. tenacissima influenced the network structuring process, and that network organization changed along the gradient. In open shrub land, when S. tenacissima became abundant, it dominated the community and other species disappeared. This resulted in a reduction of the number of links that S. tenacissima established. At the alpha-steppe, S. tenacissima coexists with other species, developing more links as it becomes more abundant. On gentle slope zones of alpha steppe, S. tenacissima is more competitive and becomes dominant for high abundance values, reducing its links with other species. The organization of networks varied similarly in both locations. When plant species reduce their abundance and number, links are more heterogeneously distributed in networks. This leads to a concentration of most of the links around a few species, particularly S. tenacissima, which is the most abundant in this case. We conclude that, in order to study plant communities, it is convenient to consider the properties of individual components together with the interaction between them.
Starting Page	595
Ending Page	603
Page Count	9
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	26
Issue Number	3
e-ISSN	14401703
Language	English
Publisher	Springer Japan
Publisher Date	2011-03-16
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecological network Spatial network Plants association Stipa tenacissima Semi-arid environment Cabo de Gata-Níjar Natural Park Spain Plant Sciences Ecology Behavioural Sciences Forestry Evolutionary Biology Zoology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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