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• W1968383122 abstract "AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 69:81-92 (2013) - DOI: https://doi.org/10.3354/ame01623 Impact of particulate organic matter composition and degradation state on the vertical structure of particle-associated and planktonic lacustrine bacteria Krista E. Köllner1,2, Dörte Carstens1,2, Carsten J. Schubert1, Josef Zeyer2, Helmut Bürgmann1,* 1Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Surface Waters - Research and Management, 6047 Kastanienbaum, Switzerland 2Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, 8092 Zürich, Switzerland *Corresponding author. Email: helmut.buergmann@eawag.ch ABSTRACT: In order to determine how concentration, composition, and degradation states of particulate organic matter (POM) influence lacustrine bacteria, we analyzed changes in bacterial community (BC) structure and total bacterial cell abundance throughout the water columns of 2 contrasting deep lakes in Switzerland. Lake Brienz is oligotrophic and fully oxic while Lake Zug is eutrophic and partially anoxic. The community composition of the particle-associated (>5 µm) and free-living (>0.2, <5 µm) bacteria was analyzed by automated ribosomal intergenic spacer analysis (ARISA). Cluster analysis showed that the lakes comprised distinct BCs. However, the BCs of both lakes were structured with depth. Although particulate amino compounds appeared to impact the number of ARISA-operational taxonomic units of the particle-associated BCs throughout the lake water columns, the compositional dynamics of this bacterial fraction were affected more strongly by the sampling date and physico-chemical parameters, such as pH. For the free-living BCs, the chlorin index (CI), an indicator for the degradation state of primary produced POM, appeared to significantly impact the vertical community shifts. The vertical changes of the total bacterial cell abundance were also significantly determined by the CI and by shifts in particulate amino compounds. The present study shows that not only bulk environmental parameters but also POM composition and degradation state shape the abundance and composition of lacustrine BCs. KEY WORDS: Lake · Freshwater · Degradation index · Microbial community · Variation partitioning · Environmental factors · Amino sugars · Amino acids Full text in pdf format Supplementary material PreviousCite this article as: Köllner KE, Carstens D, Schubert CJ, Zeyer J, Bürgmann H (2013) Impact of particulate organic matter composition and degradation state on the vertical structure of particle-associated and planktonic lacustrine bacteria. Aquat Microb Ecol 69:81-92. https://doi.org/10.3354/ame01623 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 69, No. 1. Online publication date: April 18, 2013 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 2013 Inter-Research." @default.
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• W1968383122 title "Impact of particulate organic matter composition and degradation state on the vertical structure of particle-associated and planktonic lacustrine bacteria" @default.
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