Diversity and spatial distribution of sediment ammonia-oxidizing crenarchaeota in response to estuarine and environmental gradients in the Changjiang Estuary and East China Sea

Dang, Hongyue; Zhang, Xiaoxia; Sun, Jin; Li, Tiegang; Zhang, Zhinan; Yang, Guanpin

doi:10.1099/mic.0.2007/013581-0

Cited by 151 publications

(173 citation statements)

References 59 publications

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“…Nutrient concentrations of sand pore water (Table 1) in this study were slightly lower than those reported previously [51,52]. The overall N/P stoichiometric ratios varied from 17.2 to 34.1 exceeding the Redfield ratio of 16, which suggested that P is the main limiting nutrient for phytoplankton production.…”

Section: Environmental Conditionscontrasting

confidence: 48%

Impacts of Mariculture on the Diversity of Bacterial Communities within Intertidal Sediments in the Northeast of China

et al. 2013

Microb Ecol

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Mariculture is one of the major seafood supplies worldwide and has caused serious environmental concerns on the coastal zone. Its rapid development has been shown to disrupt the sediment ecosystems and thus influence the benthic bacterial communities. Bacterial diversity and community structure within both adjacent farms and non-cultured zones intertidal sediments along the coasts of Qinhuangdao and Dalian, China, were investigated using full-length 16S rRNA gene-based T-RFLP analyses and clone library construction. Richness and Shannon-Wiener index were significantly increased at sites adjacent the mariculture farm with mean values of 29 and 2.97 from peak profiles of T-RFLP result. Clustering analyses suggested that impacts of mariculture on bacterial diversity of sediment were significantly larger than those resulted from temporal and spatial scales. Upon comparisons of RFLP patterns from 602 clones from libraries of the selected five samples, 137 OTUs were retrieved. Members of γ-and δ-Proteobacteria, Bacilli, Flavobacteria, and Actinobacteria were recorded in all libraries. In addition, γ-Proteobacteria were dominant in all samples (21.7~45.0 %). Redundancy analysis revealed that the distribution of bacterial composition seemed to be determined by the variables of salinity, PO 4 3− -P, NH 4 + -N, and Chlorophyll a content. The phyla of γ-Proteobacteria, Clostridia, Flavobacteria, Bacilli, and Planctomycetes were principal components to contribute to the bacterial differences of clone libraries. Our finding demonstrated that these phyla could display variations of bacterial composition linked to environmental disturbance resulted from mariculture.

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Section: Environmental Conditionscontrasting

confidence: 48%

Impacts of Mariculture on the Diversity of Bacterial Communities within Intertidal Sediments in the Northeast of China

et al. 2013

Microb Ecol

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“…Earlier studies have suggested that nitrite (Sahan and Muyzer, 2008) and pH (Nicol et al, 2008) may be determining factors in the niche differentiation between AOA and AOB, whereas salinity and hydrological factors have been suggested to have an influence on the structure and dominance of AOA or AOB communities (Stehr et al, 1995;Cebron et al, 2003;Francis et al, 2003;Bernhard et al, 2005;Dang et al, 2008;Mosier and Francis, 2008). This suggests that there are likely to be a number of potentially confounding environmental factors shaping ammonia oxidising communities in estuarine sediments.…”

Section: Discussionmentioning

confidence: 96%

Archaeal ammonia oxidizers and nirS-type denitrifiers dominate sediment nitrifying and denitrifying populations in a subtropical macrotidal estuary

et al. 2009

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Nitrification and denitrification are key steps in nitrogen (N) cycling. The coupling of these processes, which affects the flow of N in ecosystems, requires close interaction of nitrifying and denitrifying microorganisms, both spatially and temporally. The diversity, temporal and spatial variations in the microbial communities affecting these processes was examined, in relation to N cycling, across 12 sites in the Fitzroy river estuary, which is a turbid subtropical estuary in central Queensland. The estuary is a major source of nutrients discharged to the Great Barrier Reef nearshore zone. Measurement of nitrogen fluxes showed an active denitrifying community during all sampling months. Archaeal ammonia monooxygenase (amoA of AOA, functional marker for nitrification) was significantly more abundant than Betaproteobacterial (b-AOB) amoA. Nitrite reductase genes, functional markers for denitrification, were dominated by nirS and not nirK types at all sites during the year. AOA communities were dominated by the soil/sediment cluster of Crenarchaeota, with sequences found in estuarine sediment, marine and terrestrial environments, whereas nirS sequences were significantly more diverse (where operational taxonomic units were defined at both the threshold of 5% and 15% sequence similarity) and were closely related to sequences originating from estuarine sediments. Terminal-restriction fragment length polymorphism (T-RFLP) analysis revealed that AOA population compositions varied spatially along the estuary, whereas nirS populations changed temporally. Statistical analysis of individual T-RF dominance suggested that salinity and C:N were associated with the community succession of AOA, whereas the nirS-type denitrifier communities were related to salinity and chlorophyll-a in the Fitzroy river estuary.

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“…Previous studies have demonstrated that sediment, the primary site of estuarine nitrification, may contain both AOA and AOB, with some estuarine regions dominated by AOB (Mosier & Francis 2008, Santoro et al 2008) and others by AOA (Beman & Francis 2006, Abell et al 2010. The reason for the presence of one group of seemingly functionally equivalent groups over another in the environment is unclear, although it has been suggested that pH (Nicol et al 2008), nitrite (Sahan & Muyzer 2008), sulphide and phosphate (Erguder et al 2009) and salinity (Mosier & Francis 2008) may be important, whilst large variations in salinity, oxygen and hydrological factors may shape the structure of these communities (Stehr et al 1995, Cébron et al 2003, Francis et al 2003, Dang et al 2008, Abell et al 2010, Abell et al 2011.…”

Section: Introductionmentioning

confidence: 99%

Nitrifying and denitrifying microbial communities and their relationship to nutrient fluxes and sediment geochemistry in the Derwent Estuary, Tasmania

Abell¹,

Ross²,

Keane³

et al. 2013

Aquat. Microb. Ecol.

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Mineralisation, nitrification and denitrification in sediments are key processes that contribute to the removal of nitrogen from coastal waters. Together these processes are important in preventing the buildup of nitrogen, which can lead to eutrophication in estuarine systems. Spatial and temporal patterns in the composition of nitrifier (bacterial [AOB] and archaeal ammonia oxidizers [AOA]; amoA), denitrifier (nirS) and total bacterial and archaeal (16S rRNA gene) communities in sediment from the Derwent Estuary in southeast Tasmania, Australia, were contrasted with key environmental parameters and benthic nutrient fluxes. Spatial and temporal factors were significant in terms of shaping microbial community composition. Organic matter composition (C:N isotope ratios, %N and %C) was significantly related to the abundance of the different microbial guilds. There was a significant correlation between both the sediment nitrogen content and carbon stable isotope ratio with community composition for total bacteria, AOA and denitrifiers. Sediment chlorophyll a was significantly associated with AOB composition and carbon isotope ratio was related to total archaeal community composition.

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Diversity and spatial distribution of sediment ammonia-oxidizing crenarchaeota in response to estuarine and environmental gradients in the Changjiang Estuary and East China Sea

Cited by 151 publications

References 59 publications

Impacts of Mariculture on the Diversity of Bacterial Communities within Intertidal Sediments in the Northeast of China

Impacts of Mariculture on the Diversity of Bacterial Communities within Intertidal Sediments in the Northeast of China

Archaeal ammonia oxidizers and nirS-type denitrifiers dominate sediment nitrifying and denitrifying populations in a subtropical macrotidal estuary

Nitrifying and denitrifying microbial communities and their relationship to nutrient fluxes and sediment geochemistry in the Derwent Estuary, Tasmania

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