Biogeochemical and microbial seasonal dynamics between water column and sediment processes in a productive mountain lake; Georgetown Lake, MT, USA

dc.contributor.authorParker, Stephen R.
dc.contributor.authorWest, Robert F
dc.contributor.authorBoyd, Eric S.
dc.contributor.authorFeyhl-Buska, Jayme
dc.contributor.authorGammons, Christopher H
dc.contributor.authorJohnston, Tyler B.
dc.contributor.authorWilliams, George P
dc.contributor.authorPoulson, Simon R
dc.date.accessioned2017-02-14T23:04:44Z
dc.date.available2017-02-14T23:04:44Z
dc.date.issued2016-08
dc.description.abstractThis manuscript details investigations of a productive, mountain freshwater lake and examines the dynamic relationship between the chemical and stable isotopes and microbial composition of lake bed sediments with the geochemistry of the lake water column. A multidisciplinary approach was used in order to better understand the lake water-sediment interactions including quantification and sequencing of microbial 16 S rRNA genes in a sediment core as well as stable isotope analysis of C, S, and N. One visit included the use of a pore water sampler to gain insight into the composition of dissolved solutes within the sediment matrix. Sediment cores showed a general decrease in total C with depth which included a decrease in the fraction of organic C combined with an increase in the fraction of inorganic C. One sediment core showed a maximum concentration of dissolved organic C, dissolved inorganic C, and dissolved methane in pore water at 4 cm depth which corresponded with a sharp increase in the abundance of 16 S rRNA templates as a proxy for the microbial population size as well as the peak abundance of a sequence affiliated with a putative methanotroph. The isotopic separation between dissolved inorganic and dissolved organic carbon is consistent with largely aerobic microbial processes dominating the upper water column, while anaerobic microbial activity dominates the sediment bed. Using sediment core carbon concentrations, predictions were made regarding the breakdown and return of stored carbon per year from this temperate climate lake with as much as 1.3 Gg C yr (super -1) being released in the form of CO (sub 2) and CH (sub 4) . Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved.en_US
dc.description.sponsorshipMontana Institute on Ecosystems (0739054); National Science Foundation (1338040); MSU Undergraduate Scholars Programen_US
dc.identifier.citationParker, Stephen R, Robert F West, Eric S Boyd, Jayme Feyhl-Buska, Christopher H Gammons, Tyler B Johnston, George P Williams, and Simon R Poulson. "Biogeochemical and microbial seasonal dynamics between water column and sediment processes in a productive mountain lake; Georgetown Lake, MT, USA." Journal of Geophysical Research: Biogeosciences 121, no. 8 (August 2016): 2064-2081. DOI:https://dx.doi.org/10.1002/2015JG003309.en_US
dc.identifier.issn2169-8953
dc.identifier.urihttps://scholarworks.montana.edu/handle/1/12607
dc.language.isoen_USen_US
dc.rights"This is the peer reviewed version of the following article: Biogeochemical and microbial seasonal dynamics between water column and sediment processes in a productive mountain lake; Georgetown Lake, MT, USA, which has been published in final form at https://dx.doi.org/10.1002/2015JG003309. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."en_US
dc.titleBiogeochemical and microbial seasonal dynamics between water column and sediment processes in a productive mountain lake; Georgetown Lake, MT, USAen_US
dc.typeArticleen_US
mus.citation.extentfirstpage2064en_US
mus.citation.extentlastpage2081en_US
mus.citation.issue8en_US
mus.citation.journaltitleJournal of Geophysical Research: Biogeosciencesen_US
mus.citation.volume121en_US
mus.data.thumbpage3en_US
mus.identifier.categoryChemical & Material Sciencesen_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.identifier.doihttps://dx.doi.org/10.1002/2015JG003309en_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentMicrobiology & Immunology.en_US
mus.relation.universityMontana State University - Bozemanen_US

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