Humans have altered ecosystem productivity and biodiversity worldwide by changing land-cover types and management. High local species richness is commonly found in geographic areas and ecosystems with high net primary productivity (NPP), but the long-term effects of modification on productivity and biodiversity change, and particularly on the relationship between the two, are poorly understood. Here we evaluate whether human modification tends to increase biodiversity in low-productivity ecosystems (where human management is likely to increase productivity) and decrease biodiversity in ecosystems that were originally high-productive.

中文翻译：

---

人类对土地覆盖的改变改变了净初级生产力、物种丰富度及其关系

人类通过改变土地覆盖类型和管理，改变了全世界的生态系统生产力和生物多样性。当地物种丰富度高通常出现在净初级生产力（NPP）高的地理区域和生态系统中，但人们对生产力和生物多样性变化的长期影响，特别是对两者之间关系的长期影响知之甚少。在这里，我们评估人类改造是否会增加低生产力生态系统中的生物多样性（人类管理可能会提高生产力），并减少原本高生产力生态系统中的生物多样性。