Spatial and temporal variation in denitrification and in the denitrifier community in a boreal lake
Rissanen, A., Tiirola, M., & Ojala, A. (2011). Spatial and temporal variation in denitrification and in the denitrifier community in a boreal lake. Aquatic Microbial Ecology, 64 (1), 27-40. doi:10.3354/ame01506
Julkaistu sarjassa
Aquatic Microbial EcologyPäivämäärä
2011Tekijänoikeudet
© 2011 Inter-Research
We investigated the spatial and temporal variation in denitrification rates (isotope-pairing technique, IPT) and in the denitrifier community (examination of gene nirK by denaturing-gradient gel electrophoresis [DGGE] of microbial DNA) in the sediments of a boreal, clear-water, eutrophic lake using samples collected from shallow littoral, deep littoral and shallow profundal sediments during early summer, mid-summer, autumn and winter. The measured denitrification rates (44 to 613 µmol N m−² d−¹) are among the lowest ever reported from lacustrine sediments. Denitrification rates varied both spatially and temporally, being highest in the profundal zone during mid-summer and in the littoral zones during winter. Correlation analyses indicated that these variations were due to variations in the concentrations of nitrate and oxygen in the water overlying the sediment. The structure of the denitrifier community was temporally extremely stable and differed only slightly between the sites. Distance-based linear model (DISTLM) analysis indicated that the observed variation was probably due mainly to variations in the content of organic matter, and in the porosity, of the sediment. The structure of the denitrifier community and the denitrifying activities were uncoupled.
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Julkaisija
Inter ResearchISSN Hae Julkaisufoorumista
0948-3055Asiasanat
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http://www.int-res.com/journals/ame/ame-home/Metadata
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Spatial and temporal variation in denitrification and in the denitrifier community in a boreal lake
Rissanen, Antti; Tiirola, Marja; Ojala, Anne (Inter Research, 2011)We investigated the spatial and temporal variation in denitrification rates (isotopepairing technique, IPT) and in the denitrifier community (examination of gene nirK by denaturinggradient gel electrophoresis [DGGE] of ... -
In-depth characterization of denitrifier communities across different soil ecosystems in the tundra
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Interlake variation and environmental controls of denitrification across different geographical scales
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Microbial controls of greenhouse gas emissions from boreal lakes
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Denitrifying microbial communities along a boreal stream with varying land-use
Aalto, Sanni L.; Saarenheimo, Jatta; Arvola, Lauri; Tiirola, Marja; Huotari, Jussi; Rissanen, Antti J. (Birkhaeuser Science, 2019)Streams have an important role in regulating nitrogen (N) transportation from terrestrial ecosystems to downstream waters. Here, we examined how catchment land-use affects potential denitrification rates and the function ...
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