Whole-lake carbon-13 additions reveal terrestrial support of aquatic food webs

Abstract

Ecosystems are supported by organic carbon from two distinct sources. Endogenous carbon is produced by photosynthesis within an ecosystem by autotrophic organisms. Exogenous carbon is produced elsewhere and transported into ecosystems. Consumers may use exogenous carbon with consequent influences on population dynamics, predator–prey relationships and… (More)
DOI: 10.1038/nature02227