Land-based salmon aquacultures change the quality and bacterial degradation of riverine dissolved organic matter.

ABSTRACT: Aquacultures are of great economic importance worldwide but pollute pristine headwater streams, lakes, and estuaries. However, there are no in-depth studies of the consequences of aquacultures on dissolved organic matter (DOM) composition and structure. We performed a detailed molecular level characterization of aquaculture DOM quality and its bacterial degradation using four salmon aquacultures in Chile. Fluorescence measurements, ultrahigh-resolution mass spectrometry, and nuclear magnetic resonance spectroscopy of the DOM revealed specific and extensive molecular alterations caused by aquacultures. Aquacultures released large quantities of readily bioavailable metabolites (primarily carbohydrates and peptides/proteins, and lipids), causing the organic matter downstream of all the invest

SUBMITTER: Kamjunke N 

PROVIDER: S-EPMC5335611 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature