Tracing carbon flows through Arctic and alpine watersheds
Organic matter turnover and mobilization links the productivity of terrestrial and fluvial ecosystems and regulates global climate. The first part of this dissertation reviews how our conceptual framework of soil organic matter (SOM) and dissolved organic matter (DOM) cycling has evolved, and emphasizes the role of microbial communities in controlling SOM stability. Chapter two investigates how fresh carbon (C) influences SOM cycling in soils underlying two dominant Arctic plant species. We amended soils colonized by Eriophorum vaginatum—a tussock-forming sedge—and Betula nana—a competitive dwarf ...
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