Response of bacterial communities to environmental changes in a mesoscale subtropical watershed, Southeast China

Hu, Anyi; Yang, Xiaoyang; Chen, Nengwang; Hou, Liyuan; Ma, Ying; Yu, Chang‐Ping

doi:10.1016/j.scitotenv.2013.11.097

Cited by 88 publications

(57 citation statements)

References 61 publications

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“…The coastlines of the lower salinity part of the JRE are boarded by mangroves. Due to rapid economic development in this area in the past 30 years, intensive human activities such as agricultural practices, livestock breeding, and urbanization have great impacts on both river and estuary nutrient biogeochemistry [21]. Recently, Yan et al [20] have found the concentrations of NO 3 -N and SRP increased two to three times in the upper/middle areas of the JRE since the 1990s, which is the major cause resulting in eutrophication and algal blooms in the JRE and the adjacent Xiamen Bay.…”

Section: Study Areamentioning

confidence: 99%

“…pH was measured at a 1:2.5 sediment-to-water ratio (w/vol). Inorganic nitrogen was extracted from 2 g dried sample with 2 M KCl, and the concentrations of NH 4 -N, NO 2 -N, and NO 3 -N were determined using Lachat QC8500 Flow Injection Auto-analyzer (Lachat Instruments, Loveland, CO, USA) as described elsewhere [21].…”

Section: Sample Collection and Environmental Parameter Analysismentioning

confidence: 99%

“…DNA from environmental samples was extracted in duplicate following protocols established in our lab [21]. For quantification of bacterial and archaeal 16S rRNA genes, RT-PCR reactions were performed in triplicates using an Applied Biosystems 7500 Real-Time PCR system (Life Technologies, Forster City, CA, USA) with SYBR green method [27].…”

Section: Dna Extraction and Real-time Pcr Assaymentioning

confidence: 99%

“…In the present study, potential sources we examined included global soil archaeal communities from 146 soils obtained from North and South America and Antarctica [49] and the planktonic and benthic archaeal communities sampled from the Jiulong River during 16th-19th October 2011 [21] (Fig. S2) (our unpublished data, SRA accession number SRX527142).…”

Section: Processing Of Illumina Sequencing Datamentioning

confidence: 99%

“…The JRE is profoundly influenced by its watershed-the Jiulong River Watershed which has a catchment area of 1.47×10 4 km 2 [20][21][22]. A previous nutrient study of the JRE conducted by Yan et al [20] estimated that there was 34.3×10 3 ton dissolved inorganic nitrogen (DIN) year −1 , 0.63×10 3 ton soluble reactive phosphorus (SRP) year −1 , and 72.7× 10 3 ton dissolved silicate (DSi) year −1 discharged from watershed into the JRE, which lead to eutrophication and algal blooms in the JRE and the adjacent Xiamen Sea.…”

Section: Introductionmentioning

confidence: 99%

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Biogeography of Planktonic and Benthic Archaeal Communities in a Subtropical Eutrophic Estuary of China

Hou

2015

Microb Ecol

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Mounting evidence suggests that Archaea are widespread and abundant in aquatic and terrestrial habitats and play fundamental roles in global biogeochemical cycles, yet the pattern and its ecological drivers of biogeographic distribution of archaeal community in estuarine ecosystem are still not well understood. Here, we investigated planktonic and benthic archaeal communities in the human-impacted Jiulong River estuary (JRE), southern China by using real-time PCR (RT-PCR) and Illumina 16S ribosomal RNA (rRNA) amplicon sequencing. RT-PCR analysis indicated that Archaea accounted for an average of 0.79 and 5.31 % of prokaryotic biomass in water and sediment samples of the JRE, respectively. The diversity of planktonic archaeal community decreased gradually from the river runoff to seawater, whereas that of benthic community did not show the similar pattern. The results of taxonomic assignments indicated that Thaumarchaeota (Nitrosopumilus and Cenarchaeum), Methanocorpusculum, and Methanospirillum were significantly more abundant in planktonic than benthic communities, whereas the relative abundances of Miscellaneous Crenarchaeotic Group, Marine Benthic Group-B/-D, anaerobic methane-oxidizing Archaea -1/-2D, and South Africa Gold Mine Euryarchaeotic Group 1 were higher in sediments than in surface waters. Moreover, planktonic archaeal community composition varied significantly at broad and finer-scale taxonomic levels along the salinity gradient. Multivariate statistical analyses revealed that salinity is the main factor structuring the JRE planktonic but not benthic archaeal community at both total community and population level. SourceTrakcer analysis indicated that river might be a major source of archaea in the freshwater zone of the JRE. Overall, this study advances our understanding of the biogeographic patterns and its ecological drivers of estuarine archaeal communities.

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Section: Study Areamentioning

confidence: 99%

Section: Sample Collection and Environmental Parameter Analysismentioning

confidence: 99%

Section: Dna Extraction and Real-time Pcr Assaymentioning

confidence: 99%

Section: Processing Of Illumina Sequencing Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biogeography of Planktonic and Benthic Archaeal Communities in a Subtropical Eutrophic Estuary of China

Hou

2015

Microb Ecol

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Bacterial communities in cascade reservoirs along a large river

Chen

Yang

et al. 2021

Limnology & Oceanography

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Dam construction is widespread, changing the hydrological and biogeochemical conditions and thereby the bacterial communities in the rivers of the earth. To date, knowledge is lacking about bacterial communities in cascade reservoirs. Here, we investigated the bacterial communities and potential functions of nine cascade hydropower reservoirs in 1290 km of the upper Mekong River (Lancang River in China). Along the reservoir cascade, the water temperature, rather than the presence of dams, was the main cause for the geographical patterns of bacterial community composition. Within a reservoir, significant spatial differences in sediment bacterial communities were observed between the tail, middle, and head of a reservoir. The differences in sediment properties resulted by flow velocity-sieved sedimentation from the tail to head of a reservoir caused the spatial variation in sediment bacteria communities, forming potential hotspots for biogeochemical cycling in the middle of the reservoir. In contrast, unlike in deep lakes and deep single reservoirs, the bacterioplankton community composition had no distinctly layered features in the deep cascade reservoirs, because density-induced underwater currents and convection resulting from hydropower production reduced the vertical hydro-environmental gradients. This study provides a novel perspective on the processes affecting the distribution and function of bacterial communities in river-reservoir cascades, and is a first step toward forecasting the consequences of microbially mediated biogeochemical cycling in existing and future reservoirs worldwide.

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Characterization of Reservoir Ecosystem

Sultan¹,

Pei²

2023

Reservoir Ecotoxicology

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Response of bacterial communities to environmental changes in a mesoscale subtropical watershed, Southeast China

Cited by 88 publications

References 61 publications

Biogeography of Planktonic and Benthic Archaeal Communities in a Subtropical Eutrophic Estuary of China

Biogeography of Planktonic and Benthic Archaeal Communities in a Subtropical Eutrophic Estuary of China

Bacterial communities in cascade reservoirs along a large river

Characterization of Reservoir Ecosystem

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