Genetic diversity and connectivity of southern right whales (Eubalaena australis) found in the Brazil and Chile–Peru wintering grounds and the South Georgia (Islas Georgias del Sur) feeding groundEmma L Carroll, Paulo Ott, Louise McMillan, Bárbara Galletti Vernazzani, Petra Neveceralova, Els Vermeulen, Oscar Gaggiotti, Artur Andriolo, C. Scott Baker, Connor Bamford, Peter Best, Elsa Cabrera, Susannah Calderan, Andrea Chirife, Rachel M. Fewster, Paulo A. C. Flores, Timothy Frasier, Thales R. O. Freitas, Karina Groch, Pavel Hulva, Amy Kennedy, Russell Leaper, Mathew S. Leslie, Michael Moore, Larissa Oliviera … & Jennifer A Jackson
As species recover from exploitation, continued assessments of connectivity and population structure are warranted to provide information for conservation and management. This is particularly true in species with high dispersal capacity, such as migratory whales, where patterns of connectivity could change rapidly. Here we build on a previous long-term, large-scale collaboration on southern right whales (Eubalaena australis) to combine new (nnew) and published (npub) mitochondrial (mtDNA) and microsatellite genetic data from all major wintering grounds...
Data from: Mercury exposure in an endangered seabird: long-term changes and relationships with trophic ecology and breeding successWilliam Mills, Paco Bustamante, Rona McGill, Orea Anderson, Stuart Bearhop, Yves Cherel, Stephen Votier & Richard Phillips
Mercury (Hg) is an environmental contaminant which, at high concentrations, can negatively influence avian physiology and demography. Albatrosses (Diomedeidae) have higher Hg burdens than all other avian families. Here, we measure total Hg (THg) concentrations of body feathers from adult grey-headed albatrosses (Thalassarche chrysostoma) at South Georgia. Specifically, we: (i) analyse temporal trends at South Georgia (1989–2013) and make comparisons with other breeding populations; (ii) identify factors driving variation in THg concentrations; and, (iii) examine...
Comparing Glacial-Geological Evidence and Model Simulations of Ice Sheet Change since the Last Glacial Period in the Amundsen Sea Sector of AntarcticaJ.S. Johnson, D. Pollard, P.L. Whitehouse, S.J. Roberts, D.H. Rood & J.M. Schaefer
Since the Last Glacial Maximum ~20,000 years ago, the Antarctic Ice Sheet has undergone extensive changes, resulting in a much smaller present-day configuration. Improving our understanding of basic physical processes that played important roles during that retreat is critical to providing more robust model projections of future retreat and sea-level rise. Here, a limited-area nested ice sheet model was applied to the last deglacial retreat of the West Antarctic Ice Sheet in the Amundsen Sea...
Sixteen Reftek RT130 systems with 4.5Hz 3C geophones were deployed for a month to test beamforming event location on ice streams. A small aperture array (~100 m diameter) of 10 systems was focused above a known site of seismicity. The remaining stations were distributed at greater aperture (<5 km diameter) to allow standard event location methods to be applied. Coincident with the array, a fibre optic cable of length 1 km was deployedat the surface...
Sexual segregation has important ecological implications, but its initial development in early life stages is poorly understood. We investigated the roles of size dimorphism, social behavior and predation risk on the ontogeny of sexual segregation in Antarctic fur seal, Arctocephalus gazella, pups at South Georgia. Beaches and water provide opportunities for pup social interaction and learning (through play and swimming), but increased risk of injury and death (from other seals, predatory birds, and harsh weather),...
Various benefits (e.g. tracking of resources and of climate niche) and costs (e.g. distance travelled) are hypothesized to drive seasonal animal migrations. Until now, these potential factors have been investigated together at the species level, but migratory movements are made at the individual level, leading to intraspecific variability. Here, we use ringing/recovery data from 1308 individuals belonging to thirteen North American bird species to analyse patterns in intraspecific variability of migratory destinations in order to...
Data from: Multiple late-Pleistocene colonisation events of the Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae) reveal the recent arrival of native Antarctic vascular floraE. M. Biersma, C. Torres-Díaz, K. K. Newsham, M. A. Vidal, G. Ballesteros, C. C. Figueroa, W. P. Goodall-Copestake, M.A. Leppe, M. Cuba-Díaz, M. A. Valladares, L. R. Pertierra, P. Convey, I. S. Acuña-Rodríguez, G. A. Collado & M. A. Molina-Montenegro
Aim: Antarctica’s remote and extreme terrestrial environments are inhabited by only two species of native vascular plants. We assessed genetic connectivity amongst Antarctic and South American populations of one of these species, Colobanthus quitensis, to determine its origin and age in Antarctica. Location: Maritime Antarctic, sub-Antarctic islands, South America Taxon: Antarctic pearlwort Colobanthus quitensis (Caryophyllaceae) Methods: Four chloroplast markers and one nuclear marker were sequenced from 270 samples from a latitudinal transect spanning 21–68° S....
Files for phylogenetics, structure, and migration rate analyses for the bivalve Aequiyoldia eightsiiCarlos P. Muñoz-Ramírez, Chester Sands, David Barnes, James Scourse, Alejandro Roman-Gonzalez, Simon Morley, Leyla Cardenas, Antonio Brante & Michael Meredith
The Antarctic Circumpolar Current (ACC) dominates the open-ocean circulation of the Southern Ocean, and both isolates and connects the Southern Ocean biodiversity. However, the impact on biological processes of other Southern Ocean currents is less clear. Adjacent to the West Antarctic Peninsula (WAP), the ACC flows offshore in a northeastward direction, whereas the Antarctic Peninsula Coastal Current (APCC) follows a complex circulation pattern along the coast, with topographically-influenced deflections depending on the area. Using genomic...
British Antarctic Survey7
University of Exeter3
Victoria University of Wellington1
Centre d'Ecologie Fonctionnelle et Evolutive1
University of Pretoria1
Centre for Ecology and Hydrology1
Centre d'Etudes Biologiques de Chizé1
Oregon State University1
Saint Mary's University1