Brown howler monkeys are dropping dead by the dozens in southern Mexico . Between May 4 and May 21, at least 138 died, with deaths occurring in places where temperatures have been abnormally high, exceeding 43 degrees Celsius . Before perishing, the animals suffered convulsions, hyperthermia, and fainting, which are symptoms of dehydration. Organizations responding to the catastrophe note that the main cause of death seems to be heat stroke, although they haven’t ruled out other factors.
In other countries, cacao is planted in monocultures, but here producers use agroforestry systems—where arboreal vegetation shades the cacao-growing below, and where there is a mix of crops and native species. The difference between the original ecosystem and the plantations is that the forest canopy—the upper part of the trees where the monkeys live—is lower, while the understory, the lower part of the forest, is eliminated to allow for crops.
Biology Ecology Environment Climate Change Science Mexico
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