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Low propensity for aerial dispersal in specialist spiders from fragmented landscapes

Onderzoeksoutput: Bijdrage aan tijdschriftA1: Web of Science-artikelOnderzoekpeer review

Auteurs

  • D Bonte
  • N Vandenbroecke
  • L Lens
  • Jean-Pierre Maelfait

Details

Originele taal-2Engels
TijdschriftProceedings of the Royal Society of London. Series B
Volume270
Tijschrift nummer1524
Pagina's (van-tot)1601-1607
Aantal pagina's7
StatusGepubliceerd - 2003

Bibliografische nota

Publication Authorstring : Bonte, D.; Vandenbroecke, N.; Lens, L.; Maelfait, J.-P.
Publication RefStringPartII : <i>Proceedings of the Royal Society of London. Series B 270(1524)</i>: 1601-1607. <a href="http://dx.doi.org/10.1098/rspb.2003.2432" target="_blank">dx.doi.org/10.1098/rspb.2003.2432</a>

Abstract

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.

Thematische lijst

EWI Biomedische wetenschappen

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