naa a22 4500 555285553 20190206082704.0 cr unu---uuuuu 190206e201807 xx s 000 0 eng 10.3929/ethz-b-000322053 doi 10.1002/eco.1952 doi (ETHRESEARCH)oai:www.research-collection.ethz.ch:20.500.11850/322053 Woody debris is related to reach‐scale hotspots of lowland stream ecosystem respiration under baseflow conditions [Elektronische Daten] [Phillip Blaen, Marie J. Kurz, Jennifer D. Drummond, Julia; id_orcid 0000-0003-0885-7829 Knapp, Clara Mendoza-Lera, Noah M. Schmadel, Megan J. Klaar, Anna Jäger, Siliva Folegot, Joseph M. Lee-Cullin, Adam S. Ward, Jay P. Zarnetske, Thibault Datry, Alexander M. Milner, Jörg Lewandowski, David M. Hannah] Open access ethresearch Stream metabolism is a fundamental, integrative indicator of aquatic ecosystem functioning. However, it is not well understood how heterogeneity in physical channel form, particularly in relation to and caused by in‐stream woody debris, regulates stream metabolism in lowland streams. We combined conservative and reactive stream tracers to investigate relationships between patterns in stream channel morphology and hydrological transport (form) and metabolic processes as characterized by ecosystem respiration (function) in a forested lowland stream at baseflow. Stream reach‐scale ecosystem respiration was related to locations ("hotspots”) with a high abundance of woody debris. In contrast, nearly all other measured hydrological and geomorphic variables previously documented or hypothesized to influence stream metabolism did not significantly explain ecosystem respiration. Our results suggest the existence of key differences in physical controls on ecosystem respiration between lowland stream systems (this study) and smaller upland streams (most previous studies) under baseflow conditions. As such, these findings have implications for reactive transport models that predict biogeochemical transformation rates from hydraulic transport parameters, for upscaling frameworks that represent biological stream processes at larger network scales, and for the effective management and restoration of aquatic ecosystems. Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 ethresearch Ecosystem respiration ethresearch Hydrological tracer ethresearch Solute transport ethresearch Stream metabolism ethresearch Woody debris ethresearch Blaen Phillip joint author Kurz Marie J. joint author Drummond Jennifer D. joint author Knapp Julia; id_orcid 0000-0003-0885-7829 joint author Mendoza-Lera Clara joint author Schmadel Noah M. joint author Klaar Megan J. joint author Jäger Anna joint author Folegot Siliva joint author Lee-Cullin Joseph M. joint author Ward Adam S. joint author Zarnetske Jay P. joint author Datry Thibault joint author Milner Alexander M. joint author Lewandowski Jörg joint author Hannah David M. joint author Ecohydrology Chichester : Wiley 11 (5), p. e1952 http://hdl.handle.net/20.500.11850/322053 text/html WWW-Backlink auf das Repository (Open access) 1 Journal Article ethresearch ETHRESEARCH 856 40 http://hdl.handle.net/20.500.11850/322053 text/html WWW-Backlink auf das Repository (Open access) ETHRESEARCH 700 1- Blaen Phillip joint author ETHRESEARCH 700 1- Kurz Marie J. joint author ETHRESEARCH 700 1- Drummond Jennifer D. joint author ETHRESEARCH 700 1- Knapp Julia; id_orcid 0000-0003-0885-7829 joint author ETHRESEARCH 700 1- Mendoza-Lera Clara joint author ETHRESEARCH 700 1- Schmadel Noah M. joint author ETHRESEARCH 700 1- Klaar Megan J. joint author ETHRESEARCH 700 1- Jäger Anna joint author ETHRESEARCH 700 1- Folegot Siliva joint author ETHRESEARCH 700 1- Lee-Cullin Joseph M. joint author ETHRESEARCH 700 1- Ward Adam S. joint author ETHRESEARCH 700 1- Zarnetske Jay P. joint author ETHRESEARCH 700 1- Datry Thibault joint author ETHRESEARCH 700 1- Milner Alexander M. joint author ETHRESEARCH 700 1- Lewandowski Jörg joint author ETHRESEARCH 700 1- Hannah David M. joint author ETHRESEARCH 773 0- Ecohydrology Chichester : Wiley 11 (5), p. e1952 BK010053 XK010053 XK010000 ETHRESEARCH ETHRESEARCH ETHRESEARCH Journal Article Open access