NDLI: Spatial network structure and robustness of detritus-based communities in a patchy environment

Content Provider	Springer Nature Link
Author	Bellisario, Bru Cerfolli, Fulvio Nascetti, Giuseppe
Copyright Year	2010
Abstract	The mechanisms that regulate the spatial distribution of species are an essential aid to understanding the effects of the environment on the persistence of populations and communities. The effects of spatial structure on the persistence and robustness of ecological communities can, in turn, prove useful in uncovering their functioning, e.g., in the decomposition of leaf detritus. We applied the framework of complex networks to evaluate the effects of spatial structure on the colonization process of leaf detritus in a patchy aquatic environment, with a spatial network of six pools at different salinity. We found three well-defined modules formed by groups of taxa sharing the same pools, observing an association between modularity and spatial proximity of pools. Modules maximize the number of links within modules, and minimize the number of links among modules, showing the presence of a strong site-specific association between taxa and pools. The topological characteristics of the network show robustness against random perturbations and a lower tolerance of targeted perturbations. These findings suggest that random events, such as flooding or heavy rains, slightly affect the robustness of the system, while localized perturbations on the most connected nodes could have a negative effect on the connectivity of the whole network. The consequences could lead to a structural and functional homogenization of the system, with potential effects for the entire trophic chain. Here we discuss the topological properties of the network in relation to the spatial distribution of pools, showing how network analysis can yield valuable insight for conservation and management.
Starting Page	813
Ending Page	821
Page Count	9
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	25
Issue Number	4
e-ISSN	14401703
Language	English
Publisher	Springer Japan
Publisher Date	2010-03-31
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Detritus colonization Macroinvertebrate Network Perturbation Spatial homogenization Forestry Behavioural Sciences Evolutionary Biology Zoology Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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