NIMBioS Archives - Oak Ridge Today

The coverage of living corals on Australiaâ€™s Great Barrier Reef could decline to less than 10 percent if ocean warming continues, according to a new study. (Photo credit: Catlin Seaview Survey/Underwater Earth)

KNOXVILLEâ€”Living corals covering Australia’s Great Barrier Reef could decline to less than 10 percent if ocean warming continues, according to a new study that explores the short- and long-term consequences of environmental changes to the reef.

The study was done by an international team of ecologists at the National Institute for Mathematical and Biological Synthesis, or NIMBioS, at the University of Tennessee in Knoxville. It is available pre-print online in the journal Ecology atÂ http://bit.ly/1JmaLk0.

Environmental change has caused the loss of more than half the world’s reef-building corals. Coral cover, a measure of the percentage of the seafloor covered by living coral, is now just 10-20 percent worldwide. The Great Barrier Reef, once considered one of the more pristine global reef systems, has lost half its coral cover in the last 27 years. Overfishing, coastal pollution, and increased greenhouse gas emissions leading to increased temperatures and ocean acidification, as well as other human impacts, are all disrupting the delicate balance maintained in coral reef ecosystems. [Read more…]

A Terrapene carolina, or eastern box turtle, near Lake Poinsett, Ark., in 2013. (Photo by Beth A. Reinke)

KNOXVILLEâ€”Although a turtle’s home may be on its back, some North American turtles face an uncertain future as a warming climate threatens to reduce their suitable habitat.

A new study conducted at the National Institute for Mathematical and Biological Synthesis at the University of Tennessee in Knoxville reconstructs the effects of past climate changes on 59 species of North American turtles and finds that the centers of the turtles’ ranges shifted an average of 45 miles for each degree of warming or cooling. While some species were able to find widespread suitable climate, other species, many of which today are endangered, were left with only minimal habitat.

Species in temperate forests and grasslands, deserts and lake systems, primarily in the central and eastern United States, were more affected by climate change than species along the Pacific Coast, in the mountain highlands of the western United States and Mexico, and in the tropics, according to the study, published in the journal PLOS ONE. [Read more…]

Science: Warming could cause great loss of Great Barrier Reef corals

UT study finds climate change threatens North American turtle habitat