Campylobacterota dominate the microbial communities in a tropical karst subterranean estuary, with implications for cycling and export of nitrogen to coastal waters

2021 ◽  
Author(s):  
Laibin Huang ◽  
Hee‐Sung Bae ◽  
Caitlin Young ◽  
Andrea J. Pain ◽  
Jonathan B. Martin ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Coastal Waters ◽  
Subterranean Estuary ◽  
Tropical Karst

Characterization of Microbial Communities from Coastal Waters Using Microarrays

2003 ◽  
pp. 327-336 ◽  
Author(s):  
O. Colin Stine ◽  
Amy Carnahan ◽  
Ruby Singh ◽  
Jan Powell ◽  
Jon P. Furuno ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Coastal Waters

scholarly journals Biodiversity of microbial communities on some species in the class Gastropoda common in coastal waters in Central Vietnam

2019 ◽  
Vol 27 (1) ◽  
pp. 29-38
Author(s):  
Thanh Binh Chu ◽  
Thi Thu Hong Do ◽  
Xuan Thinh Le ◽  
Cao Cuong Ngo ◽  
Thi Thu Huyen Pham ◽  
...  
Keyword(s):  
Sequence Analysis ◽  
16S Rrna ◽  
16S Rrna Gene ◽  
Microbial Communities ◽  
Large Class ◽  
Coastal Waters ◽  
Rrna Gene ◽  
Bacterial Strains ◽  
Yeast Strains ◽  
Central Vietnam

Gastropoda is a large class in coastal waters in Central Vietnam. The interaction between microorganisms and Gastropoda mainly consists of symbiotic and parasitic relationships. In this study, biodiversity of microbial communities on some species of Gastropoda is evaluated, thereby predicting their interaction. From 12 samples of Gastropoda including 3 species: Trochus maculatus , Cypraea eglantica , Chicoreus bruneus , 101 microorganism strains including 79 bacterial strains (78.2%), 18 yeast strains (17.8%) and 4 actinomycetes strains (4.0%) were isolated. There were 15 strains (including 8 yeast strains, 5 bacterial strains and 2 actinomycetes strains) selected to identify based on sequence analysis of the D1/D2 region (yeast) and 16S rRNA gene (bacteria and actinomycetes). Based on the identification results, it is possible to predict the nutritional relationship between microorganisms and species of Gastropoda.

scholarly journals Terrestrial Inputs Shape Coastal Bacterial and Archaeal Communities in a High Arctic Fjord (Isfjorden, Svalbard)

2021 ◽  
Vol 12 ◽  
Author(s):  
Lisa-Marie Delpech ◽  
Tobias R. Vonnahme ◽  
Maeve McGovern ◽  
Rolf Gradinger ◽  
Kim Præbel ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Coastal Waters ◽  
Environmental Gradients ◽  
Late Summer ◽  
High Arctic ◽  
Atlantic Water ◽  
The Arctic ◽  
Rrna Gene ◽  
Terrestrial Runoff ◽  
Terrestrial Inputs

The Arctic is experiencing dramatic changes including increases in precipitation, glacial melt, and permafrost thaw, resulting in increasing freshwater runoff to coastal waters. During the melt season, terrestrial runoff delivers carbon- and nutrient-rich freshwater to Arctic coastal waters, with unknown consequences for the microbial communities that play a key role in determining the cycling and fate of terrestrial matter at the land-ocean interface. To determine the impacts of runoff on coastal microbial (bacteria and archaea) communities, we investigated changes in pelagic microbial community structure between the early (June) and late (August) melt season in 2018 in the Isfjorden system (Svalbard). Amplicon sequences of the 16S rRNA gene were generated from water column, river and sediment samples collected in Isfjorden along fjord transects from shallow river estuaries and glacier fronts to the outer fjord. Community shifts were investigated in relation to environmental gradients, and compared to river and marine sediment microbial communities. We identified strong temporal and spatial reorganizations in the structure and composition of microbial communities during the summer months in relation to environmental conditions. Microbial diversity patterns highlighted a reorganization from rich communities in June toward more even and less rich communities in August. In June, waters enriched in dissolved organic carbon (DOC) provided a niche for copiotrophic taxa including Sulfitobacter and Octadecabacter. In August, lower DOC concentrations and Atlantic water inflow coincided with a shift toward more cosmopolitan taxa usually associated with summer stratified periods (e.g., SAR11 Clade Ia), and prevalent oligotrophic marine clades (OM60, SAR92). Higher riverine inputs of dissolved inorganic nutrients and suspended particulate matter also contributed to spatial reorganizations of communities in August. Sentinel taxa of this late summer fjord environment included taxa from the class Verrucomicrobiae (Roseibacillus, Luteolibacter), potentially indicative of a higher fraction of particle-attached bacteria. This study highlights the ecological relevance of terrestrial runoff for Arctic coastal microbial communities and how its impacts on biogeochemical conditions may make these communities susceptible to climate change.

Effects of warming on microbial communities in the coastal waters of temperate and subtropical zones in the Northern Hemisphere, with a focus on Gammaproteobacteria

2014 ◽  
Vol 71 (1) ◽  
pp. 91-103 ◽  
Author(s):  
Dao Thi Anh Tuyet ◽  
Toshinari Tanaka ◽  
Rumi Sohrin ◽  
Do Manh Hao ◽  
Kazuyo Nagaosa ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Northern Hemisphere ◽  
Coastal Waters

scholarly journals Temporal and spatial dynamics of Bacteria, Archaea and protists in equatorial coastal waters

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Caroline Chénard ◽  
Winona Wijaya ◽  
Daniel Vaulot ◽  
Adriana Lopes dos Santos ◽  
Patrick Martin ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Coastal Waters ◽  
Seasonal Variability ◽  
Anthropogenic Activities ◽  
Seasonal Pattern ◽  
Spatial Dynamics ◽  
Rrna Gene ◽  
Marine Microbe ◽  
Johor Strait ◽  
Singapore Strait

Abstract Singapore, an equatorial island in South East Asia, is influenced by a bi-annual reversal of wind directions which defines two monsoon seasons. We characterized the dynamics of the microbial communities of Singapore coastal waters by collecting monthly samples between February 2017 and July 2018 at four sites located across two straits with different trophic status, and sequencing the V6-V8 region of the small sub-unit ribosomal RNA gene (rRNA gene) of Bacteria, Archaea, and Eukaryota. Johor Strait, which is subjected to wider environmental fluctuations from anthropogenic activities, presented a higher abundance of copiotrophic microbes, including Cellvibrionales and Rhodobacterales. The mesotrophic Singapore Strait, where the seasonal variability is caused by changes in the oceanographic conditions, harboured a higher proportion of typically marine microbe groups such as Synechococcales, Nitrosupumilales, SAR11, SAR86, Marine Group II Archaea and Radiolaria. In addition, we observed seasonal variability of the microbial communities in the Singapore Strait, which was possibly influenced by the alternating monsoon regime, while no seasonal pattern was detected in the Johor Strait.

scholarly journals Temporal dynamics of Bacteria, Archaea and protists in equatorial coastal waters

2019 ◽  
Author(s):  
Caroline Chénard ◽  
Winona Wijaya ◽  
Daniel Vaulot ◽  
Adriana Lopes dos Santos ◽  
Patrick Martin ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Coastal Waters ◽  
Seasonal Variability ◽  
Temporal Dynamics ◽  
Anthropogenic Activities ◽  
Seasonal Pattern ◽  
Rrna Gene ◽  
Marine Microbe ◽  
Johor Strait ◽  
Singapore Strait

ABSTRACTSingapore, an equatorial island in South East Asia, is influenced by a bi-annual reversal of wind directions which defines two monsoon seasons. We characterized the dynamics of the microbial communities of Singapore coastal waters by collecting monthly samples between February 2017 and July 2018 at four sites located across two straits with different trophic status, and sequencing the V6-V8 region of the small sub-unit ribosomal RNA gene (rRNA gene) of Bacteria, Archaea, and Eukaryota. Johor Strait, which is subjected to wider environmental fluctuations from anthropogenic activities, presented a higher abundance of copiotrophic microbes, including Cellvibrionales and Rhodobacterales. The mesotrophic Singapore Strait, where the seasonal variability is caused by changes in the oceanographic conditions, harboured a higher proportion of typically marine microbe groups such as Synechococcales, Nitrosupumilales, SAR11, SAR86, Marine Group II Archaea and Radiolaria. In addition, we observed seasonal variability of the microbial communities in the Singapore Strait, which was possibly influenced by the alternating monsoon regime, while no seasonal pattern was detected in the Johor Strait.

scholarly journals Microbial Communities in Water during Red Tides along the Coast of China-A Case Study of Prorocentrum Donghaiense Red Tide in the East China Sea

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Bei Huang ◽  
Na Wei ◽  
Yuheng Hu ◽  
Hongyue Mao
Keyword(s):  
Microbial Communities ◽  
East China Sea ◽  
Relative Abundance ◽  
Coastal Waters ◽  
Red Tide ◽  
East China ◽  
Red Tides ◽  
The East China Sea ◽  
China Sea ◽  
Sea Area

Red tides are a major public hazard in the global oceans. The coast of the East China Sea is the sea area where red tide disasters are the most frequent and serious in China. In order to accurately grasp the occurrence of red tides in the coastal waters of the East China Sea, and to understand the microbial communities in the waters during the occurrence of red tides in the East China Sea, a special survey of red tides in the coastal waters of Zhejiang, China was carried out in June 2018. The results showed that nutrient concentrations of N and P were generally high in this area, DIN concentrations in most areas exceeded the permitted limit of Chinese seawater quality grade I. There were significant differences in dissolved oxygen, pH, COD, chlorophyll and phytoplankton abundance of red tides. During the investigation, red tides were found in the waters near the Yushan Islands. The content of chlorophyll a was 42.12mg/m3, the cell abundance of phytoplankton was 8.16×108/L, and the abundance of Prorocentrum edulis accounted for 98.5%. The Illumina MiSeq sequencing platform was used for 16s high-throughput sequencing of water microorganisms, and a total of 16 bacteria were identified. Proteobacteria is the first dominant phylum, followed by Cyanobacteria and Bacteroides. Some differences in bacterial community compositions between HAB and the nearby seawater were observed. The predominant bacteria in the red tide occurrence area were Proteobacteria, comprising 46.1% of the relative abundance; while the predominant bacteria in the nearby sea area, comprising 42.0% of the relative abundance.

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