Spatial and temporal dynamics of ammonia oxidizers in the sediments of the Gulf of Finland, Baltic Sea

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Vetterli , A , Hietanen , S & Leskinen , E 2016 , ' Spatial and temporal dynamics of ammonia oxidizers in the sediments of the Gulf of Finland, Baltic Sea ' , Marine Environmental Research , vol. 113 , pp. 153-163 . https://doi.org/10.1016/j.marenvres.2015.12.008

Title: Spatial and temporal dynamics of ammonia oxidizers in the sediments of the Gulf of Finland, Baltic Sea
Author: Vetterli, Adrien; Hietanen, Susanna; Leskinen, Elina
Contributor: University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
University of Helsinki, Environmental Sciences
Date: 2016-02
Language: eng
Number of pages: 11
Belongs to series: Marine Environmental Research
ISSN: 0141-1136
URI: http://hdl.handle.net/10138/174794
Abstract: The diversity and dynamics of ammonia-oxidizing bacteria (AOB) and archaea (AOA) nitrifying communities in the sediments of the eutrophic Gulf of Finland (GoF) were investigated. Using clone libraries of ammonia monooxygenase (amoA) gene fragments and terminal restriction fragment length polymorphism (TRFLP), we found a low richness of both AOB and AOA. The AOB amoA phylogeny matched that of AOB 16S ribosomal genes from the same samples. AOA communities were characterized by strong spatial variation while AOB communities showed notable temporal patterns. At open sea sites, where transient anoxic conditions prevail, richness of both AOA and AOB was lowest and communities were dominated by organisms with gene signatures unique to the GoF. Given the importance of nitrification as a link between the fixation of nitrogen and its removal from aquatic environments, the low diversity of ammonia-oxidizing microbes across the GoF could be of relevance for ecosystem resilience in the face of rapid global environmental changes. (C) 2015 Elsevier Ltd. All rights reserved.
Subject: Nitrification
Ammonia oxidizers
AmoA
16S
Sediment
Seasonal dynamics
FRANCISCO BAY ESTUARY
MONOOXYGENASE AMOA GENES
GENOME SEQUENCE
COMMUNITY COMPOSITION
NITRIFICATION RATES
RELATIVE ABUNDANCE
RIBOSOMAL-RNA
BACTERIA
ARCHAEA
DIVERSITY
1172 Environmental sciences
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