Climate warming is causing unidirectional changes to annual patterns of sea ice distribution,
structure, and freeze‐up. We summarize evidence that documents how loss of sea ice, the …

Climate change is taking place more rapidly and severely in the Arctic than anywhere on the
globe, exposing Arctic vertebrates to a host of impacts. Changes in the cryosphere dominate …

Several recent climate impact assessments on polar regions have been undertaken,
including the synthesis report on Snow, Water, Ice and Permafrost in the Arctic (AMAP …

Polar bears (Ursus maritimus) require sea ice for capturing seals and are expected to
decline range-wide as global warming and sea-ice loss continue,. Estimating when different …

In the southern Beaufort Sea of the United States and Canada, prior investigations have
linked declines in summer sea ice to reduced physical condition, growth, and survival of …

How, when, and from where Madagascar's vertebrates arrived on the island is poorly known,
and a comprehensive explanation for the distribution of its organisms has yet to emerge. We …

The number, size, and survival of bear cubs emerging from winter dens depend on maternal
condition prior to entering the den. We hypothesized that delayed implantation provides …

Abstract Aim To evaluate the Gunnerus Ridge land‐bridge hypothesis, which postulates a
Late Cretaceous causeway between eastern Antarctica and southern Madagascar allowing …

Abstract The Late Cretaceous saw distinctly endemic dinosaur faunas evolve in the northern
and southern hemispheres. The Laurasian continents of North America and Asia were …

Migratory responses to climate change may vary across and within populations, particularly
for species with large geographic ranges. An increase in the frequency of long‐distance …