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蜘蛛吃掉8亿吨的昆虫和害虫& # 8212年远远超过人类

发布时间:2018-09-28 08:08 浏览次数:admin

A new study came up with a stunning estimate of how much 大发官方娱乐spiders eat: between 400 and 800 million tons of insects and other invertebrates。 For comparison, humans consume about 400 million tons in meat and fish。 The good news for us is that most of what they eat are pests, emphasizing the important role spiders play in pest control。

Relax bro, I’;m just eating the pests。 Clynotis severus。 Image via Wikpiedia。

When most people see a spider in their house, they freak out。 Or at the very least, kill or remove it —; there’;s something about spiders that makes us not want them in our house。 But these eight-legged critters might be more our friends than we think, keeping countless insect pests in check。 Martin Nyffeler of the University of Basel in Switzerland *** Klaus Birkhofer of L*** University in Sweden combined data from 65 studies, finding that there are about 25 million metric tons’; worth of spiders on the globe —; yikes! Most spiders are found forests, grasslands and shrublands, followed by croplands, deserts, urban areas and tundra areas。

The team c***ucted two ****** models to see how much the spiders would eat。 For the firs****periment, they calculated the minimum an average spider would need to eat to survive, as well as census data on the average spider biomass per square meter in the various biomes。 Then, they complemented that model with field observations, coming to the conclusion that globally, spiders eat between 400 and 800 million tons of prey each year。 That’;s a huge amount by any standards, but just so you can get some comparison, aside from humanity which eats an estimated 400 million tons of meat and fish, whales feed on 280 to 500 million tons of seafood, while the world’;s total seabird population eats an estimated 70 million tons of fish *** other seafood。