Without Biodiversity, Ecosystems Grow Unstable

When people intervene in the environment by, say, cutting down trees or spreading fertilizer around, it often results in less biodiversity. Long term, that's a scary prospect—among other things, biodiversity is essential to maintaining a robust food supply. Now, a series of experiments in the Minnesota grasslands suggests that not only is biodiversity essential for ecological stability, but anything that affects stability—fertilizers, say, or clearing land—does so because of its influence on biodiversity.

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