Soil Respiration Responses to Prolonged Warming Vary Seasonally in a Subarctic Grassland.

ABSTRACT: Northern ecosystems are warming rapidly, but the effects on soil carbon (C) dynamics are not fully understood. In particular, it is unclear whether warming effects on soil respiration (SR) -the primary source of atmospheric CO₂ from terrestrial ecosystems- persist throughout the year or vary seasonally. While both summer and cold-season processes shape annual soil C fluxes, the long cold season, which dominates high-latitude regions, has received far less attention. Using a natural geothermal gradient in a subarctic grassland (+0°C to +10°C above ambient soil temperature), we assessed the effects of more than a decade of continuous soil warming on SR. We obtained high-resolution year-round soil CO₂ fluxes and separated geothermal from biological sources of CO₂

SUBMITTER: Protti-Sanchez F 

PROVIDER: S-EPMC12315074 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature