Anoxia decreases the magnitude of the carbon, nitrogen, and phosphorus sink in freshwaters

Simple item page
dc.contributor.authorCarey, Cayelan C.en
dc.contributor.authorHanson, Paul C.en
dc.contributor.authorThomas, R. Quinnen
dc.contributor.authorGerling, Alexandra B.en
dc.contributor.authorHounshell, Alexandria G.en
dc.contributor.authorLewis, Abigail S.en
dc.contributor.authorLofton, Mary E.en
dc.contributor.authorMcClure, Ryan P.en
dc.contributor.authorWander, Heather L.en
dc.contributor.authorWoelmer, Whitney M.en
dc.contributor.authorNiederlehner, B.R.en
dc.contributor.authorSchreiber, Madeline E.en
dc.date.accessioned2022-05-26T13:59:58Zen
dc.date.available2022-05-26T13:59:58Zen
dc.date.issued2022-05-05en
dc.description.abstractOxygen availability is decreasing in many lakes and reservoirs worldwide, raising the urgency for understanding how anoxia (low oxygen) affects coupled biogeochemical cycling, which has major implications for water quality, food webs, and ecosystem functioning. Although the increasing magnitude and prevalence of anoxia has been documented in freshwaters globally, the challenges of disentangling oxygen and temperature responses have hindered assessment of the effects of anoxia on carbon, nitrogen, and phosphorus concentrations, stoichiometry (chemical ratios), and retention in freshwaters. The consequences of anoxia are likely severe and may be irreversible, necessitating ecosystem-scale experimental investigation of decreasing freshwater oxygen availability. To address this gap, we devised and conducted REDOX (the Reservoir Ecosystem Dynamic Oxygenation eXperiment), an unprecedented, 7-year experiment in which we manipulated and modeled bottom-water (hypolimnetic) oxygen availability at the whole-ecosystem scale in a eutrophic reservoir. Seven years of data reveal that anoxia significantly increased hypolimnetic carbon, nitrogen, and phosphorus concentrations and altered elemental stoichiometry by factors of 2–5× relative to oxic periods. Importantly, prolonged summer anoxia increased nitrogen export from the reservoir by six-fold and changed the reservoir from a net sink to a net source of phosphorus and organic carbon downstream. While low oxygen in freshwaters is thought of as a response to land use and climate change, results from REDOX demonstrate that low oxygen can also be a driver of major changes to freshwater biogeochemical cycling, which may serve as an intensifying feedback that increases anoxia in downstream waterbodies. Consequently, as climate and land use change continue to increase the prevalence of anoxia in lakes and reservoirs globally, it is likely that anoxia will have major effects on freshwater carbon, nitrogen, and phosphorus budgets as well as water quality and ecosystem functioning.en
dc.description.sponsorshipFralin Life Sciences Instituteen
dc.description.sponsorshipInstitute for Critical Technology and Applied Scienceen
dc.description.sponsorshipNational Science Foundationen
dc.description.sponsorshipNSF: DGE-1651272en
dc.description.sponsorshipNSF: DBI-1933102en
dc.description.sponsorshipNSF: DBI-1933016en
dc.description.sponsorshipNSF: CNS-1737424en
dc.description.sponsorshipNSF: DEB-1753657en
dc.description.sponsorshipNSF: DEB-1753639en
dc.description.sponsorshipNSF: DEB-1753657en
dc.description.sponsorshipNSF: DEB-1753639en
dc.description.sponsorshipVirginia Tech Global Change Centeren
dc.description.sponsorshipWestern Virginia Water Authorityen
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1002/essoar.10508415.2en
dc.identifier.eissn1365-2486en
dc.identifier.issn1354-1013en
dc.identifier.issue16en
dc.identifier.orcidThomas, Robert [0000-0003-1282-7825]en
dc.identifier.orcidCarey, Cayelan [0000-0001-8835-4476]en
dc.identifier.orcidSchreiber, Madeline [0000-0002-1858-7730]en
dc.identifier.pmid35611634en
dc.identifier.urihttp://hdl.handle.net/10919/110341en
dc.identifier.volume28en
dc.language.isoenen
dc.publisherWileyen
dc.rightsCreative Commons Attribution-NonCommercial 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/en
dc.subjectbiogeochemistryen
dc.subjectecosystem modelingen
dc.subjecthypoxiaen
dc.subjectnutrient retentionen
dc.subjectoxygenen
dc.subjectREDOXen
dc.subjectreservoiren
dc.subjectstoichiometryen
dc.subjectwater qualityen
dc.subjectwhole-ecosystem experimenten
dc.titleAnoxia decreases the magnitude of the carbon, nitrogen, and phosphorus sink in freshwatersen
dc.title.serialGlobal Change Biologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Global Change Biology-2022-Carey.pdf
Size:
14.11 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download
License bundle
Now showing 1 - 1 of 1
Name:
license.txt
Size:
1.5 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Scholarly Works, Biological Sciences