Genetic structure in a coastal dune spider (Geolycosa pikei) on Long Island, New York Barrier Islands

Boulton, April M.; Ramirez, Martin G.; Blair, Catherine P.

doi:10.1111/j.1095-8312.1998.tb01534.x

Cited by 14 publications

(7 citation statements)

References 55 publications

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“…The low level of genetic diversity in P. monticola was in concordance with patterns observed in other dunedwelling arthropods (Ramirez and Froehlig 1997;Boulton et al 1998), suggesting similar environmental selection pressures. According to Boulton et al (1998), repeated sand overblowing events during the landscape's genesis may have caused repeated genetic bottlenecks in coastal dune populations of several arthropod species.…”

Section: Discussionsupporting

confidence: 79%

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Patch quality and connectivity influence spatial dynamics in a dune wolfspider

et al. 2003

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The spatial population dynamics of the wolfspider Pardosa monticola, inhabiting patchily distributed grasslands in the Flemish coastal dunes of Belgium and Northern France were investigated with incidence function models using field survey data from 1998 and 2000. Vegetation height and patch size were related to habitat quality. Mark-recapture experiments revealed maximum cursorial dispersal distances of 280 m for moss dunes and 185 m for higher dune grassland. Higher shrub vegetation appeared to be dispersal barriers. These habitat-dependant cursorial distances and the theoretically estimated ballooning distance were included with patch distances into a connectivity index for both dispersal modes. Forward multiple regression indicated that patch occurrence was influenced by habitat quality and ballooning connectivity. Habitat quality and cursorial connectivity explained patterns in short-term colonisation. Extinction appeared to be stochastic and not related to habitat quality and connectivity. Genetic differentiation and variability was low. The discrepancy between the estimated low dispersal capacity and the indirect estimate of gene flow ( F(ST)) indicates that historical population dynamics and/or historical ballooning dispersal influence the genetic structure in this species.

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Section: Discussionsupporting

confidence: 79%

“…The study of ballooning efficiency has mainly been based on field observations and has been generalised with mathematical models (Thomas 1996). Indirect estimates of dispersal, estimated by population genetic analyses, are more common (Boulton et al 1998;Ramirez and Fandino 1996;Ramirez and Haakonsen 1999;Gurdebeke et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Patch quality and connectivity influence spatial dynamics in a dune wolfspider

et al. 2003

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“…Data on the population genetic structure are only available for one species with an intermediate degree of habitat specialization (Pardosa monticola; Bonte et al 2003b) and indicate a very low genetic differentiation, even between very distant populations. Other studies on coastal dune arthropods confirm this low differentiation (Ramirez & Froehlig 1997;Boulton et al 1998), suggesting similar environmental selection pressures (sand overblowing). Additionally, spider densities are very high (Bonte et al 2000), therefore kin selection and inbreeding depression are less likely to select for dispersal.…”

Section: Discussionsupporting

confidence: 62%

Low propensity for aerial dispersal in specialist spiders from fragmented landscapes

Bonte

Vandenbroecke

Lens

et al. 2003

Proc. R. Soc. Lond. B

156

161

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Aerial dispersal by ballooning is a passive flight, by which wind drag generates an upward lift on a silk thread. It is likely to reflect an aerial lottery, in which the absence of flight direction control is a serious cost for long-distance dispersal in a fragmented landscape. For species occurring in one patchily distributed habitat type, dispersal should evolve in a different way from morphological traits, directly linked to active dispersal. Therefore, we expect that if the risk of landing in an unsuitable habitat is lower than the probability of reaching a suitable habitat, selection should benefit a well-developed ballooning behaviour. We investigated interspecific variation in the ballooning-initiating tiptoe behaviour as it is linked to spider dispersal performance. Our results indeed indicate that ballooning performance is negatively related to habitat specialization in spiders from patchy grey dunes, so habitat specialists are characterized by poorly developed dispersal behaviour. These findings are concordant with recent insights that dispersal is selected as risk spreading in generalists, while it is selected against in specialist species.

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“…Several studies report genetic differentiation within and among populations of subsocial spiders, as a result of philopatry, restricted dispersal, or founder events (Johannesen et al 1998, Johannesen and Lubin 1999Bond et al 2001;Pedersen and Loeschcke 2001). In contrast, population genetic studies of solitary species document low genetic differentiation despite a bias towards investigations of species that are suspected to be restricted in either dispersal ability or habitat availability (Ramirez and Fandino 1996;Boulton et al 1998;Ramirez and Haakonsen 1999;Tso et al 2002;Bonte et al 2003).…”

mentioning

confidence: 99%

The Transition to Social Inbred Mating Systems in Spiders: Role of Inbreeding Tolerance in a Subsocial Predecessor

Bilde

Lubin

Smith³

et al. 2005

Evolution

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Abstract. The social spiders are unusual among cooperatively breeding animals in being highly inbred. In contrast, most other social organisms are outbred owing to inbreeding avoidance mechanisms. The social spiders appear to originate from solitary subsocial ancestors, implying a transition from outbreeding to inbreeding mating systems. Such a transition may be constrained by inbreeding avoidance tactics or fitness loss due to inbreeding depression. We examined whether the mating system of a subsocial spider, in a genus with three social congeners, is likely to facilitate or hinder the transition to inbreeding social systems. Populations of subsocial Stegodyphus lineatus are substructured and spiders occur in patches, which may consist of kin groups. We investigated whether male mating dispersal prevents matings within kin groups in natural populations. Approximately half of the marked males that were recovered made short moves (Ͻ 5m) and mated within their natal patch. This potential for inbreeding was counterbalanced by a relatively high proportion of immigrant males. In mating experiments, we tested whether inbreeding actually results in lower offspring fitness. Two levels of inbreeding were tested: full sibling versus non-sib matings and matings of individuals within and between naturally occurring patches of spiders. Neither full siblings nor patch mates were discriminated against as mates. Sibling matings had no effect on direct fitness traits such as fecundity, hatching success, time to hatching and survival of the offspring, but negatively affected offspring growth rates and adult body size of both males and females. Neither direct nor indirect fitness measures differed significantly between within patch and between-patch pairs. We tested the relatedness between patch mates and nonpatch mates using DNA fingerprinting (TE-AFLP). Kinship explained 30% of the genetic variation among patches, confirming that patches are often composed of kin. Overall, we found limited male dispersal, lack of kin discrimination, and tolerance to low levels of inbreeding. These results suggest a history of inbreeding which may reduce the frequency of deleterious recessive alleles in the population and promote the evolution of inbreeding tolerance. It is likely that the lack of inbreeding avoidance in subsocial predecessors has facilitated the transition to regular inbreeding social systems.

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Genetic structure in a coastal dune spider (Geolycosa pikei) on Long Island, New York Barrier Islands

Cited by 14 publications

References 55 publications

Patch quality and connectivity influence spatial dynamics in a dune wolfspider

Patch quality and connectivity influence spatial dynamics in a dune wolfspider

Low propensity for aerial dispersal in specialist spiders from fragmented landscapes

The Transition to Social Inbred Mating Systems in Spiders: Role of Inbreeding Tolerance in a Subsocial Predecessor

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