Goose grubbing and warming suppress summer net ecosystem CO₂ uptake differentially across high-Arctic tundra habitats.

ABSTRACT: Environmental changes, such as climate warming and higher herbivory pressure, are altering the carbon balance of Arctic ecosystems; yet, how these drivers modify the carbon balance among different habitats remains uncertain. This hampers our ability to predict changes in the carbon sink strength of tundra ecosystems. We investigated how spring goose grubbing and summer warming-two key environmental-change drivers in the Arctic-alter CO₂ fluxes in three tundra habitats varying in soil moisture and plant-community composition. In a full-factorial experiment in high-Arctic Svalbard, we simulated grubbing and warming over two years and determined summer net ecosystem exchange (NEE) alongside its components: gross ecosystem productivity (GEP) and ecosystem respiration (ER). After two

SUBMITTER: Petit Bon M 

PROVIDER: S-EPMC11739665 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature