Seasonal variation in the function and diversity of methanotrophs in the littoral wetland of a boreal eutrophic lake
journal contribution
posted on 2023-05-19, 04:31authored bySiljanen, HMP, Saari, A, Bodrossy, L, Martikanen, PJ
Littoral wetlands are responsible for most of the total methane (CH4) emissions from lake ecosystems. We show that seasonally variable hydrological and temperature conditions in the littoral wetland of a eutrophic boreal lake affect the community composition and gene transcription of methanotrophs measured by a particulate methane monooxygenase (pmoA) gene-targeted microarray. Type Ib freshwater-cluster methanotrophs were favoured by the high water level, and CH4 oxidation was positively correlated with their pmoA gene transcripts. In the dry subsite of the wetland, the more stagnant hydrological conditions in summer and autumn induced the dominance of type II methanotrophs over type I methanotrophs (community composition and pmoA gene transcripts). The relative abundance of type II methanotrophs increased in winter. The results provide new insight into the variation of methanotroph communities across seasons in littoral wetlands.
History
Publication title
FEMS Microbiology Ecology: (Federation of European Microbiological Societies)
Volume
80
Pagination
548-555
ISSN
0168-6496
Department/School
Tasmanian Institute of Agriculture (TIA)
Publisher
Elsevier Science Bv
Place of publication
Po Box 211, Amsterdam, Netherlands, 1000 Ae
Rights statement
Copyright 2012 Federation of European Microbiological Societies
Repository Status
Restricted
Socio-economic Objectives
Assessment and management of benthic marine ecosystems