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
Published inAquatic Microbial Ecology
© 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. ...
MetadataShow full item record
Showing items with similar title or keywords.
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 ...
Kolehmainen, Aleksi (2021)Mikrobipopulaatiot ovat olennainen osa jokaista ekosysteemiä. Tästä huolimatta alkueliöt ovat kuitenkin huomattavasti vähemmän tutkittuja prokaryootteihin verrattuna. Tämä maisteritutkielma tutkii mikrobipopulaatioiden ...
Saarenheimo, Jatta; Aalto, Sanni L.; Rissanen, Antti J.; Tiirola, Marja (Frontiers Research Foundation, 2017)Despite high performance, municipal wastewater treatment plants (WWTPs) still discharge significant amounts of organic material and nitrogen and even microbes into the receiving water bodies, altering physico-chemical ...
Saarenheimo, Jatta; Tiirola, Marja; Rissanen, Antti (Frontiers Research Foundation, 2015)Denitrification is an important microbial process in aquatic ecosystems that can reduce the effects of eutrophication. Here, quantification and pyrosequencing of nirS, nirK, and nosZ genes encoding for nitrite and nitrous ...
Interlake variation and environmental controls of denitrification across different geographical scales Rissanen, Antti; Tiirola, Marja; Hietanen, Susanna; Ojala, Anne (Inter-Research, 2013)Denitrification in lakes significantly reduces the nitrogen (N) load from land to oceans, but the factors controlling it remain poorly understood. Therefore, interlake variation of denitrification in sediments of small to ...