Depth-dependent variability of biological nitrogen fixation and diazotrophic communities in mangrove sediments.

ABSTRACT:

Background

Nitrogen-fixing prokaryotes (diazotrophs) contribute substantially to nitrogen input in mangrove sediments, and their structure and nitrogen fixation rate (NFR) are significantly controlled by environmental conditions. Despite the well-known studies on diazotrophs in surficial sediments, the diversity, structure, and ecological functions of diazotrophic communities along environmental gradients of mangrove sediment across different depths are largely unknown. Here, we investigated how biological nitrogen fixation varied with the depth of mangrove sediments from the perspectives of both NFR and diazotrophic communities.

Results

Through acetylene reduction assay, nifH gene amplicon and metagenomic sequencing, we found that the NFR increased but the diversity of diaz

SUBMITTER: Luo Z 

PROVIDER: S-EPMC8549172 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature