A host-endoparasite network of Neotropical marine fish: are there organizational patterns?

被引:42
|
作者
Bellay, Sybelle [2 ]
Lima, Dilermando P., Jr. [2 ]
Takemoto, Ricardo M. [2 ]
Luque, Jose L. [1 ]
机构
[1] Univ Fed Rural Rio de Janeiro, Dept Parasitol Anim, BR-23851970 Seropedica, RJ, Brazil
[2] Univ Estadual Maringa, Programa Posgrad Ecol Ecossistemas Aquat Continen, Maringa, PR, Brazil
关键词
network; endoparasites; nestedness; modularity; co-occurrence; null models; SPECIES COOCCURRENCE; HELMINTH-PARASITES; NESTEDNESS; ECTOPARASITES; ARCHITECTURE; COMMUNITIES; COMPETITION; MODULARITY; ABUNDANCE; ECOLOGY;
D O I
10.1017/S0031182011001314
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
Properties of ecological networks facilitate the understanding of interaction patterns in host-parasite systems as well as the importance of each species in the interaction structure of a community. The present study evaluates the network structure, functional role of all species and patterns of parasite co-occurrence in a host-parasite network to determine the organization level of a host-parasite system consisting of 170 taxa of gastrointestinal metazoans of 39 marine fish species on the coast of Brazil. The network proved to be nested and modular, with a low degree of connectance. Host-parasite interactions were influenced by host phylogeny. Randomness in parasite co-occurrence was observed in most modules and component communities, although species segregation patterns were also observed. The low degree of connectance in the network may be the cause of properties such as nestedness and modularity, which indicate the presence of a high number of peripheral species. Segregation patterns among parasite species in modules underscore the role of host specificity. Knowledge of ecological networks allows detection of keystone species for the maintenance of biodiversity and the conduction of further studies on the stability of networks in relation to frequent environmental changes.
引用
收藏
页码:1945 / 1952
页数:8
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