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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.

Aquatic sciences, 2019-10, Vol.81 (4), p.1-10, Article 59 [Periódico revisado por pares]

Cham: Springer International Publishing

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Título:
Denitrifying microbial communities along a boreal stream with varying land-use
Autor: Aalto, Sanni L. ; Saarenheimo, Jatta ; Arvola, Lauri ; Tiirola, Marja ; Huotari, Jussi ; Rissanen, Antti J.
Assuntos: Abundance ; Agrochemicals ; Aquatic ecosystems ; Aquatic sciences ; Biomedical and Life Sciences ; Catchment area ; Communities ; Community composition ; Composition ; Creeks & streams ; Denitrification ; Ecology ; Ecosystems ; Environmental changes ; Environmental science ; Freshwater & Marine Ecology ; Genes ; Land surveys ; Land use ; Life Sciences ; Marine & Freshwater Sciences ; Microbial activity ; Microorganisms ; NirK protein ; Nitrates ; Nitrogen ; Nitrogen compounds ; Nitrous oxide ; Oceanography ; Organic chemistry ; Organic matter ; Research Article ; Rivers ; Sediment ; Sediment samples ; Sediments ; Stable isotopes ; Streams ; Terrestrial ecosystems ; Terrestrial environments ; Topographic databases ; Transportation ; Water chemistry
É parte de: Aquatic sciences, 2019-10, Vol.81 (4), p.1-10, Article 59
Descrição: 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 and composition of denitrifier communities in boreal stream sediments, using stable isotope incubations and qPCR and 454-pyrosequencing targeted on nirS , nirK and nosZ genes. Although land-use influenced the water chemistry as higher nitrite + nitrate (NO x − ) concentration at the agriculture-affected sampling point, sediment organic matter content was found to be the key factor in regulating potential denitrification rates. However, the abundance as well as the diversity and community composition of denitrifying microbes, and genetic N 2 O production potential (the ratio between nirS + nirK and nosZ gene abundances) were connected to both NO x − and sediment quality. Overall, our results suggest that catchment land-use-driven changes in N and carbon availability affect the denitrification rates, and possibly N 2 :N 2 O production ratio, in boreal streams, through altering denitrifier abundance and community composition.
Editor: Cham: Springer International Publishing
Idioma: Inglês

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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.

Cham: Springer International Publishing

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