Science Daily - Africa's Leaf-Eating Primates "Likely To Be Wiped Out" By Climate Breakdown

[hatrack]

ScienceDaily (Dec. 21, 2009) — Monkey species will become 'increasingly at risk of extinction' because of global warming, according to new research, published this week. It reveals that populations of monkeys and apes in Africa that depend largely on a diet of leaves may be wiped out by a rise in annual temperatures of two degrees Celsius. The study by researchers from Bournemouth University, Roehampton University and the University of Oxford suggests that the species most at risk are the already endangered gorillas and colobine monkeys.

The paper, published online by Animal Behaviour, pinpoints which species are most threatened by climate change in a series of new global maps. They show current and predicted distribution patterns of primates, comparing the populations according to their diet and the amount of enforced rest they are predicted to need.

They warn that Old World monkey populations in Africa will be hardest hit even by a very modest two degrees Celsius increase in global mean temperature, especially those whose diets are mainly leaf-based such as the beautiful colobine monkeys. In contrast, New World monkeys in South America will be virtually unaffected by a rise of two degrees in mean temperatures. However, even the South American species will begin to suffer if temperatures rise as much as four degrees Celsius (the currently predicted most extreme value) because suitable habitats will then become increasingly fragmented and small fragmented populations are more liable to chance risks of extinction.

These predictions are based on analyses of the ecological constraints that determine how much time animals are forced to rest. The researchers found that animals that have forced rest have less time to forage for food or engage in other biologically essential activities, such as forming friendships. Although most primates have adaptations that help them cope with the heat, they head for shelter and rest when the sun gets too hot. The researchers show that resting time is influenced by three main factors: the percentage of leaves in the animals' diet, temperature variation and mean annual temperature. When these three effects come together, susceptible species will be unable to cope and populations will go extinct.

EDIT

http://www.sciencedaily.com/releases/2009/12/091220174210.htm

[kestrel91316]

1. Kestrel Daily (Dec 21, 2009): All higher forms of life larger than a bread box

likely to be wiped out by climate breakdown. Probably half of life SMALLER than a bread box, too.

[amborin]

2. yes, many bird species already severely threatened

they simply can't adapt that fast and are now out of sync with the species they've been interdependent with