Your browser doesn't support javascript.
loading
Bacterioplankton dispersal and biogeochemical function across Alaskan Arctic catchments.
Lee, Raymond M; Griffin, Natasha; Jones, Erin; Abbott, Benjamin W; Frei, Rebecca J; Bratsman, Samuel; Proteau, Mary; Errigo, Isabella M; Shogren, Arial; Bowden, William B; Zarnetske, Jay P; Aanderud, Zachary T.
Afiliación
  • Lee RM; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA.
  • Griffin N; College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvalis, Oregon, USA.
  • Jones E; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA.
  • Abbott BW; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA.
  • Frei RJ; Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada.
  • Bratsman S; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA.
  • Proteau M; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA.
  • Errigo IM; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA.
  • Shogren A; Department of Biological Sciences, The University of Alabama, Tuscaloosa, Alabama, USA.
  • Bowden WB; The Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, Vermont, USA.
  • Zarnetske JP; Department of Earth and Environmental Sciences, Michigan State University, East Lansing, Michigan, USA.
  • Aanderud ZT; Department of Plant and Wildlife Sciences, Brigham Young University, Provo, Utah, USA.
Environ Microbiol ; 24(12): 5690-5706, 2022 12.
Article en En | MEDLINE | ID: mdl-36273269
In Arctic catchments, bacterioplankton are dispersed through soils and streams, both of which freeze and thaw/flow in phase, seasonally. To characterize this dispersal and its potential impact on biogeochemistry, we collected bacterioplankton and measured stream physicochemistry during snowmelt and after vegetation senescence across multiple stream orders in alpine, tundra, and tundra-dominated-by-lakes catchments. In all catchments, differences in community composition were associated with seasonal thaw, then attachment status (i.e. free floating or sediment associated), and then stream order. Bacterioplankton taxonomic diversity and richness were elevated in sediment-associated fractions and in higher-order reaches during snowmelt. Families Chthonomonadaceae, Pyrinomonadaceae, and Xiphinematobacteraceae were abundantly different across seasons, while Flavobacteriaceae and Microscillaceae were abundantly different between free-floating and sediment-associated fractions. Physicochemical data suggested there was high iron (Fe+ ) production (alpine catchment); Fe+ production and chloride (Cl- ) removal (tundra catchment); and phosphorus (SRP) removal and ammonium (NH4 + ) production (lake catchment). In tundra landscapes, these 'hot spots' of Fe+ production and Cl- removal accompanied shifts in species richness, while SRP promoted the antecedent community. Our findings suggest that freshet increases bacterial dispersal from headwater catchments to receiving catchments, where bacterioplankton-mineral relations stabilized communities in free-flowing reaches, but bacterioplankton-nutrient relations stabilized those punctuated by lakes.
Asunto(s)

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Plancton / Lagos Idioma: En Revista: Environ Microbiol Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Plancton / Lagos Idioma: En Revista: Environ Microbiol Año: 2022 Tipo del documento: Article País de afiliación: Estados Unidos