Verbundprojekt
SPP 1127 TP - Radiationen - Genese biologischer Diversität - Teilprojekt: Testing for non-adaptive radiations in European spring snails
Geldgeber: Deutsche Forschungsgemeinschaft
Laufzeit: 2006-2010
URL: https://gepris.dfg.de/gepris/projekt/27030111
Ausführliche Beschreibung:
Recently, there has been an increased interest in the study of radiations. However, whereas one form of radiation ¿ adaptive radiation ¿ has been studied extensively, another form ¿ non-adaptive radiation ¿ is discussed controversially and poorly understood. In fact, the concept of non-adaptive radiation (i.e., diversification not accompanied by adaptation into various niches and resulting in a group of allopatric species) is rejected by some workers. Although specific and testable criteria have been proposed for this radiation, they have never been tested in a comprehensive and rigorous statistical fashion, partly because many radiations in continental animal groups (particularly in Europe) have been largely affected by human impact. A possible exception is the European spring snail genus Bythinella; a large monophyletic group with several proposed radiations that is distributed throughout the continent, yet only little affected by human impact. Moreover, its presumed lack of morphological and niche differentiation makes it an ideal candidate for studying non-adaptive radiations. Based on extensive morphological, genetic, and ecological data, the goals of the current projects are to identify radiations, to test the previously proposed criteria for nonadaptive radiation and to test for potential gradual differences between adaptive and nonadaptive radiations.
Recently, there has been an increased interest in the study of radiations. However, whereas one form of radiation ¿ adaptive radiation ¿ has been studied extensively, another form ¿ non-adaptive radiation ¿ is discussed controversially and poorly understood. In fact, the concept of non-adaptive radiation (i.e., diversification not accompanied by adaptation into various niches and resulting in a group of allopatric species) is rejected by some workers. Although specific and testable criteria have been proposed for this radiation, they have never been tested in a comprehensive and rigorous statistical fashion, partly because many radiations in continental animal groups (particularly in Europe) have been largely affected by human impact. A possible exception is the European spring snail genus Bythinella; a large monophyletic group with several proposed radiations that is distributed throughout the continent, yet only little affected by human impact. Moreover, its presumed lack of morphological and niche differentiation makes it an ideal candidate for studying non-adaptive radiations. Based on extensive morphological, genetic, and ecological data, the goals of the current projects are to identify radiations, to test the previously proposed criteria for nonadaptive radiation and to test for potential gradual differences between adaptive and nonadaptive radiations.
Koordinierende Einrichtung
- Heinrich Heine Universität Düsseldorf
Kooperationspartner mit Förderung
4 von 6
- Philipps-Universität Marburg
- Senckenberg Gesellschaft für Naturforschung
- Staatliche Naturwissenschaftliche Sammlungen Bayerns
- Staatliches Museum für Naturkunde Stuttgart
- Stiftung Edmund Mach von San Michele all'Adige - Fondazione Edmund Mach - Istituto Agrario di San Michele all’Adige
