Synchronous Biodegradability and Production of Dissolved Organic Matter in Two Streams of Varying Land Use.

ABSTRACT: In aquatic ecosystems, dissolved organic matter (DOM) composition is driven by land use, microbial activity, and seasonal variation in hydrology and water temperature, and, in turn, its microbial bioavailability is expected to vary due to differences in its composition. It is commonly assumed that DOM of terrestrial origin is resistant to microbial activity because it is composed of more complex aromatic compounds. However, the effect of DOM sources on the microbial reworking and degradation of the DOM pool remains debated. We performed laboratory incubation experiments to examine how temporal changes in DOM composition influence its microbial biodegradability in two contrasting streams (agricultural and forested) in southern Ontario, Canada. Despite a more allochthonous-like DOM signature

SUBMITTER: Kadjeski M 

PROVIDER: S-EPMC7701103 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature