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Title |
Spatial Heterogeneity as a Genetic Mixing Mechanism in Highly Philopatric Colonial Seabirds |
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Year |
2015 |
Publication |
PLOS ONE |
Abbreviated Journal  |
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Volume |
10 |
Issue |
2 |
Pages |
e0117981 |
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Keywords |
Animal sexual behavior Animal sociality Birds Inbreeding Penguins Population genetics Seabirds Spatial autocorrelation |
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Abstract |
How genetic diversity is maintained in philopatric colonial systems remains unclear, and understanding the dynamic balance of philopatry and dispersal at all spatial scales is essential to the study of the evolution of coloniality. In the King penguin, Aptenodytes patagonicus, return rates of post-fledging chicks to their natal sub-colony are remarkably high. Empirical studies have shown that adults return year after year to their previous breeding territories within a radius of a few meters. Yet, little reliable data are available on intra- and inter-colonial dispersal in this species. Here, we present the first fine-scale study of the genetic structure in a king penguin colony in the Crozet Archipelago. Samples were collected from individual chicks and analysed at 8 microsatellite loci. Precise geolocation data of hatching sites and selective pressures associated with habitat features were recorded for all sampling locations. We found that despite strong natal and breeding site fidelity, king penguins retain a high degree of panmixia and genetic diversity. Yet, genetic structure appears markedly heterogeneous across the colony, with higher-than-expected inbreeding levels, and local inbreeding and relatedness hotspots that overlap predicted higher-quality nesting locations. This points towards heterogeneous population structure at the sub-colony level, in which fine-scale environmental features drive local philopatric behaviour, while lower-quality patches may act as genetic mixing mechanisms at the colony level. These findings show how a lack of global genetic structuring can emerge from small-scale heterogeneity in ecological parameters, as opposed to the classical model of homogeneous dispersal. Our results also emphasize the importance of sampling design for estimation of population parameters in colonial seabirds, as at high spatial resolution, basic genetic features are shown to be location-dependent. Finally, this study stresses the importance of understanding intra-colonial dispersal and genetic mixing mechanisms in order to better estimate species-wide gene flows and population dynamics. |
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137 |
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1932-6203 |
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1932-6203 |
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yes |
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6695 |
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Year |
2016 |
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ZooKeys |
Abbreviated Journal |
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Volume |
630 |
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Pages |
1-17 |
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1044 |
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1313-2970 |
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1313-2970 |
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yes |
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6696 |
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Title |
Telomere length reflects individual quality in free-living adult king penguins |
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Year |
2015 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
38 |
Issue |
12 |
Pages |
2059-2067 |
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137 |
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ISSN |
0722-4060, 1432-2056 |
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0722-4060, 1432-2056 |
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yes |
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6697 |
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Title |
Individual parameters shape foraging activity in breeding king penguins |
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Journal |
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Year |
2016 |
Publication |
Behavioral Ecology |
Abbreviated Journal |
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Volume |
27 |
Issue |
1 |
Pages |
352-362 |
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137 |
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ISSN |
1045-2249 |
ISBN |
1045-2249 |
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yes |
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Call Number |
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Serial |
6699 |
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Title |
Patterns of genetic diversity and structure in Antarctic and sub-Antarctic Nacella (Patellogastropoda: Nacellidae) species |
Type |
Journal |
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Year |
2016 |
Publication |
Biodiversity |
Abbreviated Journal |
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Volume |
17 |
Issue |
1-2 |
Pages |
46-55 |
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Keywords |
Antarctic Circumpolar Current biogeography Last Glacial Maximum Nacella phylogeography Southern Ocean |
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Abstract |
The biogeography of the Southern Ocean reflects complex interactions between major macro-evolutionary forces and biotic elements. Major gateway openings, the establishment of the Antarctic Circumpolar Current and climate cooling are deeply connected to the composition, abundance and distribution of the Southern Ocean marine benthic fauna. Glacial episodes of the Quaternary heavily impacted the distribution of the genetic variation of the Southern Ocean biota. The genus Nacella includes 12 nominal species in different provinces of the Southern Ocean. In this study, we compared patterns of mitochondrial DNA diversity in three Nacella species from Antarctic Peninsula, Kerguelen Island and Patagonia. Low levels of genetic diversity and absence of genetic structure characterise each one of them showing the strong impact of ice advances and retreats over their respective demographics. Haplotype diversity, short genealogies and demographic inference recorded suggest the occurrence of a more dramatic demographic process in Antarctic Peninsula than in the sub-Antarctic. |
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1044 |
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ISSN |
1488-8386 |
ISBN |
1488-8386 |
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Approved |
yes |
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Call Number |
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Serial |
6700 |
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Author |
Tshoanelo Miya, Ofer Gon, Monica Mwale, Elie Poulin |
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Title |
Molecular systematics and taxonomic status of three latitudinally widespread nototheniid (Perciformes: Notothenioidei) fishes from the Southern Ocean |
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Year |
2016 |
Publication |
Zootaxa |
Abbreviated Journal |
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Volume |
4061 |
Issue |
4 |
Pages |
381-396 |
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Keywords |
Atlantic Ocean sector Gobionotothen Indian Ocean sector Lepidonotothen mitochondrial DNA nuclear gene Pisces sequence divergence |
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Abstract |
The taxonomic status of the three nototheniids, Lepidonotothen squamifrons, L. larseni and Gobionotothen marionensis from different localities in the Southern Ocean is re-evaluated at the DNA level. DNA sequence divergences and phylogenetic relationship were estimated using a combined mitochondrial (mtDNA, ND2 and COI) dataset and data for one nuclear gene (S7 intron 1). Phylogenies of both datasets had Lepidonotothen kempi nested within L. squamifrons lineage, with low sequence divergences (0% to 0.4%) between the two nominal species suggesting that they are populations of one species. Therefore, these results do not support the previous splitting of L. squamifrons into different species. Similarly, the L. larseni specimens also represented a single genetic unit (0.3% to 0.6%) with low geographic variation between Atlantic and Indian Ocean specimens, which does not support the splitting of this species into geographically restricted species. The mtDNA phylogeny clearly separated individuals of G. acuta from Kerguelen, Heard and MacDonald Islands from G. marionensis individuals into different clades, with sequence divergence of 2.9% between these clades supporting they are different species. |
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1044 |
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ISSN |
1175-5334 |
ISBN |
1175-5334 |
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yes |
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6701 |
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Title |
Out of Antarctica: quaternary colonization of sub-Antarctic Marion Island by the limpet genus Nacella (Patellogastropoda: Nacellidae) |
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Journal |
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Year |
2016 |
Publication |
Polar Biology |
Abbreviated Journal |
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Volume |
39 |
Issue |
1 |
Pages |
77-89 |
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Abstract |
The distribution of the Southern Ocean nearshore marine benthic fauna is the consequence of major geologic, oceanographic, and climatic changes during the last 50 Ma. As a result, a main biogeographic principle in the Southern Ocean is the clear distinction of the Antarctic biota. The Antarctic Polar Front (APF) represents an important barrier between Antarctica and other sub-Antarctic provinces. However, the high degree of genetic affinity between populations of the Antarctic limpet Nacella concinna and its sub-Antarctic relative Nacella delesserti from Marion Island stands against this tenet. Here, we performed new phylogenetic reconstructions in Nacella with special emphasis on the relationship between N. concinna and N. delesserti. Similarly, we performed population-based analyses in N. concinna and N. delesserti to further understand the genetic legacy of the Quaternary glacial cycles. Phylogenetic reconstructions recognized N. concinna and N. delesserti as two closely but distinct monophyletic entities and therefore as valid evolutionary units. The cladogenetic process separating them occurred ~0.35 Ma and is consistent with the origin of Marion Island (~0.45 Ma). Exceptional long-distance dispersal between provinces located inside and outside the APF, rather than revealing the permeability of the Antarctic Polar Front, seems to be related to latitudinal shift in the position of the APF during coldest periods of the Quaternary. Diversity indices, neutrality tests, haplotype networks, and demographic inference analysis showed that the demography of both species exhibits a clear signal of postglacial expansion. |
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1044 |
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ISSN |
0722-4060, 1432-2056 |
ISBN |
0722-4060, 1432-2056 |
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yes |
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6702 |
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Title |
Full circumpolar migration ensures evolutionary unity in the Emperor penguin |
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Year |
2016 |
Publication |
Nature Communications |
Abbreviated Journal |
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Volume |
7 |
Issue |
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Pages |
11842 |
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137 |
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ISSN |
2041-1723 |
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2041-1723 |
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yes |
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6703 |
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Title |
Antarctica and the strategic plan for biodiversity |
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Year |
2017 |
Publication |
PLOS Biology |
Abbreviated Journal |
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Volume |
15 |
Issue |
3 |
Pages |
e2001656 |
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Keywords |
Antarctic Ocean Antarctica Biodiversity Conservation science Invasive species Marine conservation Marine ecology Marine ecosystems |
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Abstract |
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137 |
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ISSN |
1545-7885 |
ISBN |
1545-7885 |
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yes |
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6704 |
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Author |
Cornet C., Amelineau F., Babel D., Boureau M., Courtecuisse J., Cristofari R., Descamps S., Marpaux S., Morinay J., Saraux C., Whittington J.d., Le Maho Y., Le Bohec C. |
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Title |
The adaptive capacities of Adelie penguins to face environmental variability: the role of heterogeneity within populations |
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Communication |
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Year |
2014 |
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137 |
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yes |
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Call Number |
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6705 |
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