Nowhere in the world does the freezing line loom as drastically as the Himalayas. The results were recently published in the journal Nature Communications. You may not notice a similar turnover of bird species within continents, but in fact one is present at the freezing line-the boundary between the tropics and cooler, temperate areas.Īs part of his PhD thesis at UChicago, Alex White, PhD’18, conducted a study that shows that despite no significant physical barriers stopping them from spreading out, bird species are strongly confined to their habitats as demarcated by the freezing line.
Scrutinize the distribution of birds across the globe, and it is obvious that land birds, for example, have ranges that abruptly end at coastlines. As a result, the geographical distribution of birds may be more restricted than we think. However, a study led a former University of Chicago graduate student shows that birds have strong ties to the climate patterns of their habitat. One might assume that birds of flight are cosmopolitan travelers, and bird species should be distributed far and wide-spread across long distances and even continents.
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