Scientists have long been warning of uncompromising shrink of animal species population triggered by global warming. But, recently it is found that global warming threat is more than "just" too much heat.
eelpout populations reducing 9
Yes, a new study reveals that a mild temperature rise -- long before it gets unbearably hot -- can shrink the population of an animal species. Interacting with physiological needs, subtle environmental change can weaken a species' ability to maintain a viable population even when the rise in the temperature is too mild to kill individual organisms.
This insight is found behind the eelpout populations decline occurring in the southern part of the North Sea. A relatively mild rise in water temperature can reduce the water's ability to hold dissolved oxygen. At the same time, it also increases the fish's need for more oxygen for maintaining its vigor.
This is shown by Hans O. Pörtner and Rainer Knust at Germany's Alfred Wegner Institute for Polar and Marine Research in Bremerhaven.
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