Low larval densities in northern populations reinforce range expansion by a Mediterranean damselfly
نویسندگان
چکیده
منابع مشابه
Range expansion of heterogeneous populations.
Risk spreading in bacterial populations is generally regarded as a strategy to maximize survival. Here, we study its role during range expansion of a genetically diverse population where growth and motility are two alternative traits. We find that during the initial expansion phase fast-growing cells do have a selective advantage. By contrast, asymptotically, generalists balancing motility and ...
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The evolution of higher dispersal during range expansion increases invasion speed, provided that a species can adapt sufficiently fast to novel local conditions. Iterated founder effects during range expansion, however, cause low levels of local genetic diversity at these range margins. Mutation rates can evolve, too, and using an individual-based model we show that natural selection may lead t...
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A wealth of population genetic studies have documented that many successful biological invasions stem from multiple introductions from genetically distinct source populations. Yet, mechanistic understanding of whether and how genetic mixture promotes invasiveness has lagged behind documentation that such mixture commonly occurs. We conducted a laboratory experiment to test the influence of gene...
متن کاملA comparison of Aedes vigilax larval population densities and associated vegetation categories in a coastal wetland, Northern Territory, Australia.
Darwin's northern suburbs border an extensive coastal reed and upper mangrove wetland recognized as an important larval habitat for Aedes vigilax (Skuse), the northern salt marsh mosquito, an established vector for Ross River and Barmah Forest viruses and an appreciable pest species. We sought to identify the most important vegetation categories associated with Ae. vigilax breeding to maximize ...
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Behavioural interactions and habitat use by larvae of the giant damselfly, Megaloprepus coerulatus, were studied in Panama. These larvae live in water-filled holes in fallen and living trees. Despite potential advantages for larval territoriality in this species, M. coerulatus did not exhibit exclusive use of resources, probably because their prey were not spatially clumped. Both well-fed and s...
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ژورنال
عنوان ژورنال: Freshwater Biology
سال: 2016
ISSN: 0046-5070,1365-2427
DOI: 10.1111/fwb.12782