Spatial and temporal heterogeneity of methane ebullition in lowland headwater streams and the impact on sampling design.

ABSTRACT: Headwater streams are known sources of methane (CH₄) to the atmosphere, but their contribution to global scale budgets remains poorly constrained. While efforts have been made to better understand diffusive fluxes of CH₄ in streams, much less attention has been paid to ebullitive fluxes. We examine the temporal and spatial heterogeneity of CH₄ ebullition from four lowland headwater streams in the temperate northeastern United States over a 2-yr period. Ebullition was observed in all monitored streams with an overall mean rate of 1.00 ± 0.23 mmol CH₄ m^-2 d^-1, ranging from 0.01 to 1.79 to mmol CH₄ m^-2 d^-1 across streams. At biweekly timescales, rates of ebullition tended to increase with temper

SUBMITTER: Robison AL 

PROVIDER: S-EPMC9293065 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature