Jim Austin, Rob Fletcher, Bob McCleery and Sam Wisely have been awarded an NSF International Research Experience for Students. This program will be centered in Swaziland, focus on our ecological research on biodiversity impacts of land use, and will run over the next 3 summers. Look for information on how to participate on the soon to be released website (uf-ires.com).
Jim’s paper (with Steve Lougheed and Kat Stewart from Queen’s U) on secondary contact zone dynamics in a small frog has been accepted for publication in Heredity!
Robert J. Fletcher, Ellen P. Robertson, Rebecca C. Wilcox, Brian E. Reichert, James D. Austin, Wiley M. Kitchens
Published 2 September 2015. DOI: 10.1098/rspb.2015.1545
Understanding dispersal and habitat selection behaviours is central to many problems in ecology, evolution and conservation. One factor often hypothesized to influence habitat selection by dispersers is the natal environment experienced by juveniles. Nonetheless, evidence for the effect of natal environment on dispersing, wild vertebrates remains limited. Using 18 years of nesting and mark–resight data across an entire North American geographical range of an endangered bird, the snail kite (Rostrhamus sociabilis), we tested for natal effects on breeding-site selection by dispersers and its consequences for reproductive success and population structure. Dispersing snail kites were more likely to nest in wetlands of the same habitat type (lacustrine or palustrine) as their natal wetland, independent of dispersal distance, but this preference declined with age and if individuals were born during droughts. Importantly, dispersing kites that bred in natal-like habitats had lower nest success and productivity than kites that did not. These behaviours help explain recently described population connectivity and spatial structure across their geographical range and reveal that assortative breeding is occurring, where birds are more likely to breed with individuals born in the same wetland type as their natal habitat. Natal environments can thus have long-term and large-scale effects on populations in nature, even in highly mobile animals.
Congratulations to John for his award from the American Fisheries Society, recognizing excellence in graduate-level fisheries genetics!