Monsoonal impacts on the community trophic niches in two temperate headwater tributaries across a land use continuum.

ABSTRACT: Pulsed flows following heavy monsoon rain events alter riverine food webs, but their impact on headwater stream food webs across the continuum from forested canopy to open agricultural land use remains unclear. We investigated carbon and nitrogen stable isotopes in macroinvertebrates and fish in two tributaries of the Suyeung River, Korea, before and after heavy monsoon rains to assess changes in community trophic niches. Basal resources (leaf litter and biofilms) exhibited consistent δ¹³C and δ¹⁵N values across seasons, with biofilms showing higher δ¹³C values. δ¹⁵N values increased from forested to agricultural reaches, indicating varied nutrient inputs. Consumer isotope values remained stable over time but varied longitudinally, reflecting rel

SUBMITTER: Kang HY 

PROVIDER: S-EPMC11519938 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature