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Earlier winter/spring runoff and snowmelt during warmer winters lead to lower summer chlorophyll-a in north temperate lakes

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dc.contributor.authorHrycik, Allison R.en
dc.contributor.authorIsles, Peter D. F.en
dc.contributor.authorAdrian, Ritaen
dc.contributor.authorAlbright, Matthewen
dc.contributor.authorBacon, Linda C.en
dc.contributor.authorBerger, Stella A.en
dc.contributor.authorBhattacharya, Ruchien
dc.contributor.authorGrossart, Hans-Peteren
dc.contributor.authorHejzlar, Josefen
dc.contributor.authorHetherington, Amy Leeen
dc.contributor.authorKnoll, Lesley B.en
dc.contributor.authorLaas, Aloen
dc.contributor.authorMcDonald, Cory P.en
dc.contributor.authorMerrell, Kellieen
dc.contributor.authorNejstgaard, Jens C.en
dc.contributor.authorNelson, Kirstenen
dc.contributor.authorNoges, Peeteren
dc.contributor.authorPaterson, Andrew M.en
dc.contributor.authorPilla, Rachel M.en
dc.contributor.authorRobertson, Dale M.en
dc.contributor.authorRudstam, Lars G.en
dc.contributor.authorRusak, James A.en
dc.contributor.authorSadro, Stevenen
dc.contributor.authorSilow, Eugene A.en
dc.contributor.authorStockwell, Jason D.en
dc.contributor.authorYao, Huaxiaen
dc.contributor.authorYokota, Kiyokoen
dc.contributor.authorPierson, Donald C.en
dc.date.accessioned2022-09-22T17:20:04Zen
dc.date.available2022-09-22T17:20:04Zen
dc.date.issued2021-10en
dc.description.abstractWinter conditions, such as ice cover and snow accumulation, are changing rapidly at northern latitudes and can have important implications for lake processes. For example, snowmelt in the watershed-a defining feature of lake hydrology because it delivers a large portion of annual nutrient inputs-is becoming earlier. Consequently, earlier and a shorter duration of snowmelt are expected to affect annual phytoplankton biomass. To test this hypothesis, we developed an index of runoff timing based on the date when 50% of cumulative runoff between January 1 and May 31 had occurred. The runoff index was computed using stream discharge for inflows, outflows, or for flows from nearby streams for 41 lakes in Europe and North America. The runoff index was then compared with summer chlorophyll-a (Chl-a) concentration (a proxy for phytoplankton biomass) across 5-53 years for each lake. Earlier runoff generally corresponded to lower summer Chl-a. Furthermore, years with earlier runoff also had lower winter/spring runoff magnitude, more protracted runoff, and earlier ice-out. We examined several lake characteristics that may regulate the strength of the relationship between runoff timing and summer Chl-a concentrations; however, our tested covariates had little effect on the relationship. Date of ice-out was not clearly related to summer Chl-a concentrations. Our results indicate that ongoing changes in winter conditions may have important consequences for summer phytoplankton biomass and production.en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesVermont Space Grant Consortium under NASA Cooperative Agreement; NASA Earth and Space Science Fellowship under NASA Cooperative Agreement; Swedish Infrastructure for Ecosystem Science (SITES); MANTEL; Limnoscenes (Biodiversa); Limnoscenes (Belmond Forum); Limnoscenes (German Science Foundation); RSCF project, of Ministry of Higher Education and Research; Foundation for support of applied ecological studies of Lake Baikal; ERDF/ESF project Biomanipulation; Estonian Research Council grant(Estonian Research Council); MANTEL ITN; Estonian Research Council grantsen
dc.description.sponsorshipVermont Space Grant Consortium under NASA Cooperative Agreement [NNX15AP86H]; NASA Earth and Space Science Fellowship under NASA Cooperative Agreement [80NSSC18K1394P0000]; Swedish Infrastructure for Ecosystem Science (SITES); MANTEL [H2020-MSCA-ITN-2061]; Limnoscenes (Biodiversa); Limnoscenes (Belmond Forum); Limnoscenes (German Science Foundation); RSCF project, of Ministry of Higher Education and Research [18-44-06201, FZZE-2020-0026, FZZE-2020-0023]; Foundation for support of applied ecological studies of Lake Baikal; ERDF/ESF project Biomanipulation [CZ.02.1.01/0.0/0.0/16_025/0007417]; Estonian Research Council grant [PUT PSG32]; MANTEL ITN [H2020-MSCA-ITN-2061]; Estonian Research Council grants [PRG705]en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1111/gcb.15797en
dc.identifier.eissn1365-2486en
dc.identifier.issn1354-1013en
dc.identifier.issue19en
dc.identifier.urihttp://hdl.handle.net/10919/111965en
dc.identifier.volume27en
dc.language.isoenen
dc.publisherWileyen
dc.rightsPublic Domain (U.S.)en
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/en
dc.subjectchlorophyll-aen
dc.subjectclimate changeen
dc.subjectlong-term dataen
dc.subjectphytoplankton biomassen
dc.subjectsnowmelten
dc.subjectstream dischargeen
dc.titleEarlier winter/spring runoff and snowmelt during warmer winters lead to lower summer chlorophyll-a in north temperate lakesen
dc.title.serialGlobal Change Biologyen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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