Overall, disease was the primary culprit, accounting for 26 percent of the mass die-offs. Direct effects tied to humans, such as environmental contamination, caused 19 percent of the mass kills. Biotoxicity triggered by events such as algae blooms accounted for a significant proportion of deaths, and processes directly influenced by climate -- including weather extremes, thermal stress, oxygen stress or starvation -- collectively contributed to about 25 percent of mass mortality events. The most severe events were those with multiple causes, the study found. sciencedaily/releases/2015/01/150112181319.htm
Posted on: Tue, 13 Jan 2015 05:44:47 +0000
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