Publication
Microbial community composition and function in permanently cold seawater and sediments from an Arctic fjord of Svalbard
| dc.contributor.author | Teske, A. | |
| dc.contributor.author | Durbin, A. | |
| dc.contributor.author | Ziergovel, K. | |
| dc.contributor.author | Cox, C. J. | |
| dc.contributor.author | Arnosti, C. | |
| dc.date.accessioned | 2014-10-24T14:57:19Z | |
| dc.date.available | 2014-10-24T14:57:19Z | |
| dc.date.issued | 2011 | |
| dc.description.abstract | Heterotrophic microbial communities in seawater and sediments metabolize much of the organic carbon produced in the ocean. Although carbon cycling and preservation depend critically on the capabilities of these microbial communities, their compositions and capabilities have seldom been examined simultaneously at the same site. To compare the abilities of seawater and sedimentary microbial communities to initiate organic matter degradation, we measured the extracellular enzymatic hydrolysis rates of 10 substrates (polysaccharides and algal extracts) in surface seawater and bottom water as well as in surface and anoxic sediments of an Arctic fjord. Patterns of enzyme activities differed between seawater and sediments, not just quantitatively, in accordance with higher cell numbers in sediments, but also in their more diversified enzyme spectrum. Sedimentary microbial communities hydrolyzed all of the fluorescently labeled polysaccharide and algal extracts, in most cases at higher rates in subsurface than surface sediments. In seawater, in contrast, only 5 of the 7 polysaccharides and 2 of the 3 algal extracts were hydrolyzed, and hydrolysis rates in surface and deepwater were virtually identical. To compare bacterial communities, 16S rRNA gene clone libraries were constructed from the same seawater and sediment samples; they diverged strongly in composition. Thus, the broader enzymatic capabilities of the sedimentary microbial communities may result from the compositional differences between seawater and sedimentary microbial communities, rather than from gene expression differences among compositionally similar communities. The greater number of phylum- and subphylum-level lineages and operational taxonomic units in sediments than in seawater samples may reflect the necessity of a wider range of enzymatic capabilities and strategies to access organic matter that has already been degraded during passage through the water column. When transformations of marine organic matter are considered, differences in community composition and their different abilities to access organic matter should be taken into account. | por |
| dc.description.sponsorship | We thank the captain of R/V Farm and members of the Max Planck Institute’s Svalbard 2007 scientific party for excellent seamanship and teamwork during the cruise, Drew Steen for help with seawater sampling and logistics, Sherif Ghobrial for assistance with sample processing, and Enten von Bad Iburg for facilitating the fieldwork. Partial funding was provided by NSF (grant OCE-0848703 to C.A. and grant NSF-0527167 to A.T.). We are grateful for the generous support of fieldwork and logistics by the Max Planck Institute for Marine Microbiology (Bremen, Germany) that enabled us to carry out this study. | por |
| dc.identifier.citation | A. Teske, A. Durbin, K. Ziervogel, C. Cox, and C. Arnosti, "Microbial community composition and function in permanently cold seawater and sediments from an Arctic fjord of Svalbard" in APPLIED AND ENVIRONMENTAL MICROBIOLOGY, Mar. 2011, p. 2008–2018. | por |
| dc.identifier.doi | http://dx.doi.org/10.1128/AEM.01507-10 | |
| dc.identifier.issn | 0099-2240 | |
| dc.identifier.uri | http://hdl.handle.net/10400.1/5510 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | American Society for Microbiology | por |
| dc.relation.publisherversion | http://aem.asm.org/content/77/6/2008 | por |
| dc.title | Microbial community composition and function in permanently cold seawater and sediments from an Arctic fjord of Svalbard | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 2018 | por |
| oaire.citation.startPage | 2008 | por |
| oaire.citation.title | Applied and Environmental Microbiology | por |
| oaire.citation.volume | 77 | por |
| person.familyName | Cox | |
| person.givenName | Cymon | |
| person.identifier.ciencia-id | 6B15-9771-1D04 | |
| person.identifier.orcid | 0000-0002-4927-979X | |
| person.identifier.rid | D-1303-2012 | |
| person.identifier.scopus-author-id | 7402112716 | |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 82c3689c-60b6-440d-9d7b-49e6dbd6861b | |
| relation.isAuthorOfPublication.latestForDiscovery | 82c3689c-60b6-440d-9d7b-49e6dbd6861b |
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