Acid rain can fall far from the site of the human activity that caused it. The diversity of functions performed by plants can be more important to an ecosystem's processes than the number of different species present. The roots of tundra plants take up organic nitrogen, providing some of their necessary nutrition.

中文翻译：

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长期生态研究网络庆祝40周年发现：该网络激发了国际和农业的努力。

酸雨可能会远离导致其的人类活动的地点。对于生态系统的过程而言，植物执行的功能的多样性可能比存在的不同物种的数量更为重要。苔原植物的根吸收有机氮，提供一些必需的营养。