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Study predicts wildlife of Africa's Albertine Rift will be threatened by climate change

March 08, 2018

A new study by scientists from WCS (Wildlife Conservation Society) and other groups predicts that the effects of climate change will severely impact the Albertine Rift, one of Africa's most biodiverse regions and a place not normally associated with global warming.

Of the species existing within this region, the authors anticipate that nearly 50 percent of the mammals, birds, reptiles, and other organisms found nowhere else on earth will become threatened according to the criteria of the Red List, an inventory of imperiled animals and plants maintained by the International Union for Conservation of Nature (IUCN).

The study titled "Conservation of the endemic species of the Albertine Rift under future climate change" appears in the online version of the journal Biological Conservation. The authors are: S. Ayebare, D. Kujirakwinja, D. Segan of WCS; and A.J. Plumptre of WCS and the Conservation Science Group in Cambridge, United Kingdom.

"Much of the Albertine Rift is mountainous terrain, and the species that inhabit these places have narrow ranges," said WCS scientist Dr. Andrew Plumptre, one of the authors of the study. "This makes many species especially vulnerable to climate change. Using distribution models to predict how ranges will shift as climate and precipitation levels change provide us with the means to determine how well existing protected areas will safeguard wildlife into the future."

The Albertine Rift encompasses parts of five countries (Uganda, Democratic Republic of Congo, Rwanda, Burundi, and Tanzania) and stretches from the southern tip of Lake Tanganyika to the northern tip of Lake Albert.

Using data from several sources on 162 terrestrial animals and plants unique (endemic) to the Albertine Rift, the researchers used ecological niche modeling (computer models) to determine the extent of habitat already lost due to agriculture, and to estimate the future loss of habitat as a result of climate change. On average 38 percent of suitable habitat has already been lost to agriculture in this region, where some of the highest human population densities occur in Africa.

One positive finding of the ecological niche modelling study is that while the ranges of many species are expected to contract, much of the remaining suitable habitat for many species will be located within existing protected areas, and that the recent creation of new reserves such as Itombwe and Kabobo in the Democratic Republic of Congo, have greatly increased the protection of some species under threat by future climate change. It is estimated that nearly 68 percent of the areas where current and future habitat will overlap is already safeguarded by parks and reserves.

Projecting forward, the research team anticipate that the ranges of many species will shift to higher elevations as changing environmental conditions envelop the landscapes of the Albertine Rift. The study models predicted that, on average, a shocking 75 percent of all remaining suitable habitat across all species examined would disappear by the year 2080. By that time, only an average of 15.5 percent of the original suitable habitat of the mammals, birds, and other endemic species of the Albertine Rift would remain. The most extreme forecasts--the loss of more than 90 percent of all remaining habitat--is expected to imperil 34 of the rift's endemic species.

"We hope that this study and similar ones will help wildlife managers and government agencies to anticipate where conservation measures to protect the region's unique primates, such as the mountain and Grauer's gorillas, birds, reptiles, and other unique species will be most effective," said Sam Ayebare of WCS Uganda and lead author of the paper.
-end-
This work was supported by the John D. and Catherine T. MacArthur Foundation, the U.S. Fish and Wildlife Service, and the U.S. Agency for International Development's Central Africa Forest Ecosystems Conservation (CAFEC) project.

Wildlife Conservation Society (WCS)

MISSION: WCS saves wildlife and wild places worldwide through science, conservation action, education, and inspiring people to value nature.

VISION: WCS envisions a world where wildlife thrives in healthy lands and seas, valued by societies that embrace and benefit from the diversity and integrity of life on earth. To achieve our mission, WCS, based at the Bronx Zoo, harnesses the power of its Global Conservation Program in more than 60 nations and in all the world's oceans and its five wildlife parks in New York City, visited by 4 million people annually. WCS combines its expertise in the field, zoos, and aquarium to achieve its conservation mission.

The John D. and Catherine T. MacArthur Foundation supports creative people, effective institutions, and influential networks building a more just, verdant, and peaceful world. MacArthur is placing a few big bets that truly significant progress is possible on some of the world's most pressing social challenges, including over-incarceration, global climate change, nuclear risk, and significantly increasing capital for the social sector. In addition to the MacArthur Fellows Program, the Foundation continues its historic commitments to the role of journalism in a responsible and responsive democracy; the strength and vitality of our headquarters city, Chicago; and generating new knowledge about critical issues.

Wildlife Conservation Society

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