![]() ![]() In fact, they found the highest local earthworm diversity in Europe, the northeastern US, and New Zealand. Plant, insect, or bird diversity (the number of species within any given area) typically increases from high to low latitudes, meaning that the number of species is highest in the tropics.įor earthworms, however, researchers found the opposite pattern. Surprisingly, in any single location, there are typically more earthworms and more earthworm species found in temperate regions than in the tropics, according to their new study. The results of the huge effort-the largest earthworm dataset worldwide, encompassing 6928 sites in 57 countries-show that patterns of belowground biodiversity do not match those observed for organisms living aboveground, which could have implications for conservation efforts. Climate change could alter earthworm communities worldwide, threatening the many functions they provide, researchers warn.
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