Climate impacts on transocean dispersal and habitat in gray whales from the Pleistocene to 2100

  title={Climate impacts on transocean dispersal and habitat in gray whales from the Pleistocene to 2100},
  author={S. Elizabeth Alter and Matthias Meyer and Klaas Post and Paul Czechowski and Peter Gravlund and Cork Gaines and Howard C. Rosenbaum and Kristin Kaschner and Samuel T. Turvey and Johannes van der Plicht and Beth Shapiro and Michael Hofreiter},
  journal={Molecular Ecology},
Arctic animals face dramatic habitat alteration due to ongoing climate change. [] Key Method We used a combination of ancient and modern DNA, radiocarbon dating and predictive habitat modelling to better understand the distribution of gray whales during the Pleistocene and Holocene. Our results reveal that dispersal between the Pacific and Atlantic was climate dependent and occurred both during the Pleistocene prior to the last glacial period and the early Holocene immediately following the opening of the…
Geographic and temporal dynamics of a global radiation and diversification in the killer whale
Taken as a whole, the data suggest that the glacial cycles influenced local populations in different ways, with no clear global pattern, but with secondary contact among lineages following long‐range dispersal as a potential mechanism driving ecological diversification.
Influence of Holocene habitat availability on Pacific gray whale (Eschrichtius robustus) population dynamics as inferred from whole mitochondrial genome sequences and environmental niche modeling
A large degree of haplotype sharing between gray whales sampled in Russian and Mexican waters, coupled with very limited matrilineal population structure is identified, illustrating the complex dynamics of baleen whale biogeography since the Holocene.
Post-glacial colonization of northern coastal habitat by bottlenose dolphins: A marine leading-edge expansion?
The time-calibrated phylogeny, constructed with 86 complete mitochondrial genomes including 30 generated for this study and created using a multi-species coalescent model, suggests that the expansion to the available coastal habitat in the NEA happened via founder events starting ~15,000 years ago, consistent with leading-edge expansion.
An Examination of the Ecological and Oceanographic Effects of Mid-to-Late Holocene Climate Changes on the Ross Sea Ecosystem
  • E. Brault
  • Environmental Science, Geography
  • 2017
Today, West Antarctica has been experiencing some of the most profound and rapid climate change on Earth, affecting biota from phytoplankton to seals. To better predict future changes in Antarctica
Reconstruction of marine mammals’ historical distribution and abundance : setting a baseline to understand the past, inform the present and plan the future
Relevant baselines on the historical distribution and abundance of species are needed to support appropriate conservation targets for depleted species, but the full scale of cumulative human impacts
Recent dating of extinct Atlantic gray whale fossils, (Eschrichtius robustus), Georgia Bight and Florida, western Atlantic Ocean
The hypothesis for the decline of the Atlantic gray whale in the late Pleistocene and the late Holocene is supported and the findings of the Eastern Atlantic Basin are augmented to better incorporate the Western Atlantic Basin into a pan-ocean understanding for the species.
Melting barriers to faunal exchange across ocean basins.
Reconnection of the Pacific and Atlantic Ocean basins will present both challenges to marine ecosystem conservation and an unprecedented opportunity to examine the ecological and evolutionary consequences of interoceanic faunal exchange in real time.
The inference of gray whale (Eschrichtius robustus) historical population attributes from whole-genome sequences
The results indicate that gray whale genomes contain low nucleotide diversity and have been subject to both historical and recent inbreeding, which suggests that novel migratory routes may develop within the next century and if so this could help retain overall genetic diversity.
Global vulnerability of marine mammals to global warming
It is shown that the North Pacific Ocean, the Greenland Sea and the Barents Sea host the species that are most vulnerable to global warming, and that the potential extinctions of the marine mammals that were most vulnerableto global warming might induce a disproportionate loss of functional diversity, which may have profound impacts on the future functioning of marine ecosystems worldwide.


Rapid Response of a Marine Mammal Species to Holocene Climate and Habitat Change
The founder-extinction dynamics of a population from inception to extinction in the context of Holocene climate change is tracked and evidence is presented that an unexpectedly diverse, differentiated breeding population was founded from a distant source population soon after habitat became available.
Ancient Hybridization and an Irish Origin for the Modern Polar Bear Matriline
Gene flow on ice: the role of sea ice and whaling in shaping Holarctic genetic diversity and population differentiation in bowhead whales (Balaena mysticetus)
Results from analysis of molecular variance and demographic simulations are consistent with recent and high gene flow between Atlantic and Pacific stocks in the recent past, and significant genetic differences between ancient and modern populations suggest PRI harbored unique maternal lineages in the past that have been recently lost.
Species-specific responses of Late Quaternary megafauna to climate and humans
It is shown that climate has been a major driver of population change over the past 50,000 years, however, each species responds differently to the effects of climatic shifts, habitat redistribution and human encroachment.
Ecological and Evolutionary Responses to Recent Climate Change
Range-restricted species, particularly polar and mountaintop species, show severe range contractions and have been the first groups in which entire species have gone extinct due to recent climate change.
Evaluating signatures of glacial refugia for North Atlantic benthic marine taxa.
It is argued that for marine organisms the genetic signatures of northern periglacial and southern refugia can be distinguished from one another, giving credence to recent climatic reconstructions with less extensive glaciation.
Marine mammals as ecosystem sentinels
Abstract The earth's climate is changing, possibly at an unprecedented rate. Overall, the planet is warming, sea ice and glaciers are in retreat, sea level is rising, and pollutants are accumulating
Current and Future Patterns of Global Marine Mammal Biodiversity
Quantifying the spatial distribution of taxa is an important prerequisite for the preservation of biodiversity, and can provide a baseline against which to measure the impacts of climate change. Here
Pre-Whaling Genetic Diversity and Population Ecology in Eastern Pacific Gray Whales: Insights from Ancient DNA and Stable Isotopes
Simulations demonstrate that significant genetic differences observed between ancient and modern samples could be caused by a large, recent population bottleneck, roughly concurrent with commercial whaling, and show minimal differences between modern and ancient gray whale foraging ecology.