Plant-eating animals in highly seasonal environments, such as the Arctic, are struggling to locate nutritious food as a result of climate change, according to research in Proceedings of the Royal Society B.
The research, which focused on caribou, suggests that not only are these animals arriving at their breeding grounds too late in the season to enjoy the peak availability of food - the focus of previous research by Post - but they also are suffering from a reduced ability to locate the few high-quality plants that remain before these plants, too, become unavailable.
The team focused their research on caribou in West Greenland as an example of an herbivore species in a seasonal environment. Closely related to wild reindeer, caribou are dependent on plants for all their energy and nutrients. In the spring, they switch from eating lichens buried beneath the snow to munching the new growth of willows, sedges, and flowering tundra herbs. As the birth season approaches, they are cued by increasing daylight to migrate into areas where this newly-emergent food is plentiful.