Change search
ReferencesLink to record
Permanent link

Direct link
Environmental control of methanotrophsin lakes
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Biology Education Centre.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
Abstract [en]

Aerobic methanotrophs (MOB) are a functional group of proteobacteria that use methane as their only energy and carbon source. Phylogenetically, such methanotrophs are affiliated with present alpha and gamma proteobacteria. Methanotrophic microorganisms play an essential role in the methane cycle, since they to a great extent reduce potential methane emissions to the atmosphere. In stratified lakes the aerobic methanotrophs are commonly present at the oxic-anoxic interfaces.

This study aims to identify the environmental factors that could regulate the distribution of aerobic methanotrophs in the water column of freshwater lakes as well to assess whether a vertical community structure exists there. Lakes Erken and Tämnaren located in central Swedenwere studied using molecular analysis and environmental data. Aerobic methanotrophs were detected throughout the water column of Lake Erken. Two types of methanotroph communities were identified, with distribution patterns that appeared to be correlated to levels of methane in the water. Furthermore one of these communities feature changes in the relative abundance of its member populations along a depth gradient suggesting further differentiation along chemical gradients in the hypolimnion. Sequencing of pmoA amplicons revealed only members of the gamma proteobacteria methanotrophs. Also two novel operational taxonomic units were identified. Methanotrophs communities between Tämnaren and Erken also differ. Together these results indicate the existence of distribution patterns in methanotroph freshwater communities.

Place, publisher, year, edition, pages
2011. , 29 p.
Keyword [en]
methane, lakes, limmnology, bacteria, methanotrophs
National Category
URN: urn:nbn:se:uu:diva-170260OAI: diva2:508803
Educational program
Bachelor Programme in Biology / Molecular Biology
Life Earth Science
Available from: 2012-04-11 Created: 2012-03-09 Last updated: 2012-04-11Bibliographically approved

Open Access in DiVA

fulltext(1893 kB)117 downloads
File information
File name FULLTEXT01.pdfFile size 1893 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Biology Education Centre

Search outside of DiVA

GoogleGoogle Scholar
Total: 117 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 259 hits
ReferencesLink to record
Permanent link

Direct link