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- W325428557 abstract "Closely related species often share the same local environment and use similar resources. Local diversity could then be maintained through some frequency-dependent species maintenance mechanism, fulfilling the invasibility criterion. Alternatively, and according to the neutral theory of biodiversity, different species should randomly go extinct over time. Here, I studied two closely related and congeneric damselfly species (Calopteryx splendens and Calopteryx virgo) to investigate if, how and why species with similar ecology could coexist. Through an experimental investigation in large outdoor cages, I investigated if there was any evidence for either species neutrality or coexistence via negative frequency dependent survival advantages of rare species. I quantified the longevity of both species under several different density and frequency treatments, where the number and species composition in the cages was manipulated in a fully factorial experimental design. My results suggest that longevity of these two species was similar over a large range of densities and frequency treatments, except when total male density was low and the frequency of C. splendens males was high. In this situation, C. virgo males showed evidence of a negative frequency-dependent survival advantage. I also present data on species-specific territoriality and discuss how territorial plasticity might contribute to coexistence between the two species. I found that C. virgo was significantly more likely to be territorial in two out of six density -and frequency treatments than was C. splendens. Overall, my results are consistent with species neutrality across most density and frequency-environments, although there is also evidence for negative frequency dependent fitness advantage of C. virgo at low density and when C. splendens was common. Therefore, different outcomes would be expected when these two ecologically similar and congeneric damselflies come in to contact with each other in nature, depending on environmental context. (Less)" @default.
- W325428557 created "2016-06-24" @default.
- W325428557 creator A5073556877 @default.
- W325428557 date "2015-01-01" @default.
- W325428557 modified "2023-09-27" @default.
- W325428557 title "Co-existence of calopterygid damselfly species: neutrality or negative frequency dependence?" @default.
- W325428557 hasPublicationYear "2015" @default.
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