IN SCIENCE JOURNALS

摘要

Excess nutrients added to streams result in net carbon loss from aquatic ecosystems. Nitrogen and phosphorus fuel the growth of algae, which take up terrestrial carbon to make biomass. More carbon is nevertheless eventually released into the atmosphere. Rosemond et al. monitored several multiyear experiments on headwater forest streams in the United States. Some of these streams had extra nitrogen and phosphorus added at levels that are now common in many streams and lakes. To successfully manage river ecosystems, we need to take into account both carbon loss and nutrient pollution.