Permafrost Hydrology Drives the Assimilation of Old Carbon by Stream Food Webs in the Arctic

• Main Authors: O’Donnell, Jonathan A., Carey, Michael P., Koch, Joshua C., Xu, Xiaomei, Poulin, Brett A., Walker, Jennifer, Zimmerman, Christian E.
• Format: Text
• Language: unknown
• Published: DigitalCommons@University of Nebraska - Lincoln 2019
• Subjects: Arctic; Dissolved organic matter; Streams; Permafrost; Food webs; Radiocarbon; Carbon cycle; Environmental Education; Environmental Policy; Environmental Sciences; Environmental Studies; Fire Science and Firefighting; Leisure Studies; Natural Resource Economics; Natural Resources Management and Policy; Nature and Society Relations; Other Environmental Sciences; Physical and Environmental Geography; Public Administration; Public Affairs; Public Policy and Public Administration; Recreation; Parks and Tourism Administration; Varden; Arctic grayling; Ice; permafrost; Thymallus arcticus; Alaska
• Online Access: https://digitalcommons.unl.edu/natlpark/205; https://digitalcommons.unl.edu/context/natlpark/article/1209/viewcontent/ODonnell_ECOSYSTEMS_2010_Permafrost_Hydrology.pdf

Permafrost thaw in the Arctic is mobilizing old carbon (C) from soils to aquatic ecosystems and the atmosphere. Little is known, however, about the assimilation of old C by aquatic food webs in Arctic watersheds. Here, we used C isotopes (d13C, D14C) to quantify C assimilation by biota across 12 str...