Increased temperature enhances microbial-mediated lignin decomposition in river sediment.

ABSTRACT:

Background

Lignin, as the most abundant recalcitrant organic carbon in terrestrial ecosystems, plays a crucial role in the Earth's carbon cycle. After lignin entering aquatic environments, portion of it tends to accumulate in sediments, forming a stable carbon relatively reservoir. However, the increasing temperature caused by human activities may impact microbial-mediated lignin decomposition, thereby affecting sedimentary carbon reservoirs. Therefore, revealing how temperature affects microbial-mediated lignin decomposition in river sediment, a topic that remains elusive, is essential for comprehending the feedbacks between river carbon reservoirs and climate. To address this, we conducted stable isotope probing of river surface sediment using ¹³C-lignin and ¹³

SUBMITTER: Li J 

PROVIDER: S-EPMC11959967 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature