Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1038/35079066
Volltext Shareable Link
Titel (primär) Ecological and evolutionary processes at expanding range margins
Autor Thomas, C.D.; Bodsworth, E.J.; Wilson, R.J.; Simmons, A.D.; Davies, Z.G.; Musche, M.; Conradt, L.
Quelle Nature
Erscheinungsjahr 2001
Department BZF
Band/Volume 411
Heft 6837
Seite von 577
Seite bis 581
Sprache englisch
Abstract Many animals are regarded as relatively sedentary and specialized in marginal parts of their geographical distributions1, 2. They are expected to be slow at colonizing new habitats. Despite this, the cool margins of many species' distributions have expanded rapidly in association with recent climate warming3, 4, 5, 6, 7, 8, 9, 10. We examined four insect species that have expanded their geographical ranges in Britain over the past 20 years. Here we report that two butterfly species have increased the variety of habitat types that they can colonize, and that two bush cricket species show increased fractions of longer-winged (dispersive) individuals in recently founded populations. Both ecological and evolutionary processes are probably responsible for these changes. Increased habitat breadth and dispersal tendencies have resulted in about 3- to 15-fold increases in expansion rates, allowing these insects to cross habitat disjunctions that would have represented major or complete barriers to dispersal before the expansions started. The emergence of dispersive phenotypes will increase the speed at which species invade new environments, and probably underlies the responses of many species to both past11 and future climate change.
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Thomas, C.D., Bodsworth, E.J., Wilson, R.J., Simmons, A.D., Davies, Z.G., Musche, M., Conradt, L. (2001):
Ecological and evolutionary processes at expanding range margins
Nature 411 (6837), 577 - 581 10.1038/35079066