N2 fixation in non-heterocystous cyanobacteria: an overview

Abstract

Most fieldwork has concentrated on microbial mat communities and on open-water blooms of Trichodesmium, in which both the extent and the pattern of observed N2 fixation are markedly influenced by external factors such as light, O2 and CO2. Differences in behaviour between Trichodesmium and other non-heterocystous cyanobacteria are highlighted, and possible directions for future research are indicated. -from Authors