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Title [sv]
Utforskning av nya kopplingar mellan mark och vatten: trädrötternas betydelse i kantzoner för ekosystemdynamiken i ytvatten
Title [en]
Exploring novel connections between land and water: linking belowground carbon production by trees to stream ecosystem dynamics
Abstract [en]
Resource supply from land drives the ecology and biogeochemistry of streams, rivers, and lakes and is thus central to the services these ecosystems provide. Yet, despite decades of research on land-water connections, the mechanisms that regulate resource delivery from soils to streams remain elusive. In particular, while trends in water chemistry are often linked to changes in forest growth, the mechanisms underlying these relationships are largely untested. We do know that trees allocate vast quantities of carbon belowground and that these inputs drive biogeochemical cycling in upland soils. We do not know how this allocation influences land-water connections and resource supply to streams. To reveal novel connections between forests and streams, we propose the first ever large-scale manipulation of belowground C allocation at the land-water interface. Specifically, we will use a newly-developed stem compression method to ?turn off? root production and the release of root exudates (high-quality carbon) along small boreal streams. In response, we will document changes in the organic and inorganic resource pools riparian soils, measure microbial activity along groundwater flowpaths, and evaluate metabolic responses in adjacent surface streams. Results from this work have the potential to change our view of terrestrial-aquatic interactions and help us understand how streams and rivers will respond to changes in climate and land use that are altering forest growth worldwide.
Principal InvestigatorSponseller, Ryan
Coordinating organisation
Umeå University
Funder
Period
2019-01-01 － 2022-12-31
National Category
Oceanography, Hydrology, Water Resources
Identifiers
DiVA, id: project:1603Project, id: 2018-04395_VR

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