Large but variable methane production in anoxic freshwater sediment upon addition of allochthonous and autochthonous organic matter.

ABSTRACT: An important question in the context of climate change is to understand how CH₄ production is regulated in anoxic sediments of lakes and reservoirs. The type of organic carbon (OC) present in lakes is a key factor controlling CH₄ production at anoxic conditions, but the studies investigating the methanogenic potential of the main OC types are fragmented. We incubated different types of allochthonous OC (alloOC; terrestrial plant leaves) and autochthonous OC (autoOC; phytoplankton and two aquatic plants species) in an anoxic sediment during 130 d. We tested if (1) the supply of fresh alloOC and autoOC to an anoxic refractory sediment would fuel CH₄ production and if (2) autoOC would decompose faster than alloOC. The addition of fresh OC greatly increased CH<

SUBMITTER: Grasset C 

PROVIDER: S-EPMC6108407 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature