Establishing fluvial silicon regimes and their stability across the Northern Hemisphere
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- College of Earth, Ocean, and Atmospheric Sciences Oregon State University Corvallis Oregon USA
- U.S. Geological Survey, Upper Midwest Environmental Sciences Center La Crosse Wisconsin USA
- Math, Analytics, Science and Technology Division Babson College Wellesley Massachusetts USA
- National Center for Ecological Analysis and Synthesis, University of California Santa Barbara California USA
- Department of Natural Resources and the Environment, University of New Hampshire Durham New Hampshire USA
- Department of Biological Sciences The University of Alabama Tuscaloosa Alabama USA
- Department of Natural Resources and the Environment University of New Hampshire Durham New Hampshire USA
- St. Croix Watershed Research Station Marine on St. Croix Minnesota USA
- Department of Arctic Ecology Norwegian Institute for Nature Research Tromsø Norway, Norwegian Institute for Water Research Oslo Norway
- Finnish Environment Institute Helsinki Finland
- Environmental Studies Program, Kenyon College Gambier Ohio USA
- Forest Ecology and Management, Swedish University of Agricultural Sciences Umeå Sweden
- Department of Biology and Wildlife University of Alaska Fairbanks Fairbanks Alaska USA, Institute of Arctic Biology Fairbanks Alaska USA
- Department of Civil, Environmental, and Architectural Engineering University of Colorado Boulder Boulder Colorado USA
- The Everglades Foundation Palmetto Bay Florida USA
Abstract Fluvial silicon (Si) plays a critical role in controlling primary production, water quality, and carbon sequestration through supporting freshwater and marine diatom communities. Geological, biogeochemical, and hydrological processes, as well as climate and land use, dictate the amount of Si exported by streams. Understanding Si regimes—the seasonal patterns of Si concentrations—can help identify processes driving Si export. We analyzed Si concentrations from over 200 stream sites across the Northern Hemisphere to establish distinct Si regimes and evaluated how often sites moved among regimes over their period of record. We observed five distinct regimes across diverse stream sites, with nearly 60% of sites exhibiting multiple regime types over time. Our results indicate greater spatial and interannual variability in Si seasonality than previously recognized and highlight the need to characterize the watershed and climate variables that affect Si cycling across diverse ecosystems.
- Research Organization:
- University of New Mexico, Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- SC0020146; SC0024636
- OSTI ID:
- 2281293
- Journal Information:
- Limnology and Oceanography Letters, Journal Name: Limnology and Oceanography Letters Journal Issue: 3 Vol. 9; ISSN 2378-2242
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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