Nested Subset Analyses of Colonization-Dominated Communities: Metazoan Ectoparasites of Marine Fishes

Worthen, Wade B.; Rohde, Klaus

doi:10.2307/3545888

Cited by 74 publications

(53 citation statements)

References 24 publications

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“…In accordance with the findings of Wright et al (1998), Worthen and Rohde (1996) observed that colonization-dominated assemblages are largely random and unstructured. Using the Wright-Reeves C metric, they found only one of 38 colonization-dominated ectoparasite assemblages to be significantly nested.…”

Section: Colonization Producing Nestednesssupporting

confidence: 90%

An experimental examination of colonization as a generator of biotic nestedness

2002

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Species assemblages of systems of islands and other fragmented habitats frequently show a "nested-subset" structure in which the biotas of sites with low species richness are non-random subsets of the biotas of richer sites. Much literature suggests that extinction is more likely to produce strongly nested patterns than colonization, although very few experiments have been conducted on the generation of nested-subset patterns. Here, we describe an experiment on nestedness of benthic invertebrates occupying rocks in the littoral zone of a lake in western Victoria, Australia. Data collected from previous work indicated that the invertebrate biotas of rocks were nested. We used initially defaunated, different-sized habitat patches (half house-bricks, full house-bricks, double house-bricks) and followed the time-course of occupation to assess whether nested-subset patterns would emerge, and whether extinction or colonization best accounted for the patterns. We predicted that nestedness would increase through time up to the end of the experiment. This was found to be the case with colonization dominating the establishment of a strongly nested system; extinction appeared to be of relatively little importance over the duration of the experiment. These results suggest that at least in some circumstances, differential colonization may be influential in producing nested-subset patterns but experiments conducted over longer times may be needed to more completely understand the respective roles of extinction and colonization in generating nested-subset patterns in this system.

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Section: Colonization Producing Nestednesssupporting

confidence: 90%

An experimental examination of colonization as a generator of biotic nestedness

2002

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“…Several studies showed either no evidence of nested subset pattern, or that a nested pattern is rare among parasite species in a host population (Poulin, 1996 ;Worthen and Rohde, 1996 ;Rohde et al 1998 ;Gotelli and Rohde, 2002). Rohde et al (1998), in an extensive study, showed that only onethird of parasite assemblages studied were nested, concluding that parasite assemblages in marine fish were commonly unstructured and unpredictable, at least in terms of hierarchical species assembly rules.…”

Section: Discussionmentioning

confidence: 99%

“…In recent years, many studies of parasite community ecology, based on nested analyses, have been carried out to understand the forces structuring these communities, especially on fish hosts (e.g. Poulin, 1996Poulin, , 2001Worthen and Rohde, 1996 ;Hugueny and Guégan, 1997 ;Rohde et al 1998 ;Poulin and Guégan, 2000). In parasite communities, a nested subset pattern occurs when the parasite species found in depauperate infracommunities represent non-random subsets of progressively richer ones (Rohde et al, 1998 ;Poulin and Valtonen, 2001).…”

Section: Introductionmentioning

confidence: 99%

Nested patterns in parasite component communities of a marine fish along its latitudinal range on the Pacific coast of South America

González

Poulin

2005

Parasitology

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A major goal of community ecology is to identify and explain non-random patterns of species composition. To date, the search for nested patterns in parasite component communities of the same fish host species has not been attempted, despite the fact that this higher hierarchical level is more relevant to nestedness analyses. The aims of this study are first, to determine the structure of component communities -considering ectoparasites and endoparasites separately -of a marine fish (Sebastes capensis) with an extended geographical distribution along the southeastern Pacific and, second, to explain these patterns by taking into account the extrinsic factors associated with the distribution of this host fish. From April to September 2003 and from April to August 2004, 537 fish were captured from different latitudes along the southeastern Pacific. The component communities of both ectoparasites and endoparasites of this fish host showed significant nested subset patterns. However, the type of nestedness pattern differed between ectoparasites and endoparasites. Ectoparasite component communities of S. capensis show higher species richness between latitude 30xS and 40xS, whereas endoparasite component communities show higher species richness between 40xS and 52xS. A nested pattern in ectoparasite component communities of S. capensis result from the gradual loss of some ectoparasites species southward and northward of the central part of their latitudinal distribution, which can be explained by the interaction of S. capensis with other host fish species from the central Chilean coast. Nestedness in endoparasite component communities of S. capensis is produced by the gains and losses of species toward the south of their latitudinal distribution, caused by changes in their prey-items (intermediate hosts) along their latitudinal distributional range.

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“…Several studies have investigated nestedness in parasite communities (Gue´gan and Hugueny 1994;Worthen and Rohde 1996;Hugueny and Gue´gan 1997;Rohde et al 1998;Morand et al 1999Morand et al , 2002Matejusova`et al 2000;Poulin and Gue´gan 2000), in which it seems to be a common feature (Poulin 1996). However, most of these studies investigated nestedness among individual hosts or host species but rarely among host populations (Simkova´et al 2001).…”

Section: Introductionmentioning

confidence: 97%