The Response of Potentially Active Planktonic Actinobacteria to the Construction of Three Gorges Dam of the Yangtze River, China

Jiang, Hongchen; Zhang, Qi; Dong, Raymond M.; Xiao, Haiyi; Wang, Shang; Jiao, Lu; Huang, Liuqin; Dong, Christina Z.; Zhang, Chuanlun; Dong, Hailiang

doi:10.1080/01490451.2011.558564

Cited by 4 publications

(4 citation statements)

References 27 publications

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“…AcSTL-Actinobacteria are known to be constant and abundant in freshwaters (i.e. Allgaier and Grossart, 2006;Allgaier et al, 2007;Jiang et al, 2012), but were also detected in a hypersaline lagoon suggesting a broad range of habitat specificity. On the other hand, low abundance values of Actinobacteria in winter rather point to the possibility that rare groups and indwellers emerge, which might be washed in from the catchment of the Baltic Sea (i.e.…”

Section: Relation Of Actr Distribution Patterns To Biotic and Abioticmentioning

confidence: 99%

Distribution of acI‐Actinorhodopsin genes in Baltic Sea salinity gradients indicates adaptation of facultative freshwater photoheterotrophs to brackish waters

Salka

Wurzbacher

Garcia

et al. 2013

Environmental Microbiology

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Knowledge on Actinobacteria rhodopsin gene (actR) diversity and spatial distribution is scarce. The Baltic Sea is characterized by strong salinity gradients leading to the coexistence of marine and freshwater bacteria and hence is an ideal study area to elucidate the dispersion and phylogenetic affiliation of actR in dependence on salinity. ActR DGGE fingerprints in summer 2008 revealed between 3 and 19 distinct bands within a salinity range of 2.4-27 PSU. Environmental actR clone sequences were obtained from stations distributed along the whole salinity gradient. Overall, 20 different actR sequence groups (operational taxonomic units) were found, with up to 11 different ones per station. Phylogenetically, the actR sequences were predominantly (80%) affiliated with freshwater acI-Actinobacteria whose 16S rRNA gene accounted for 2-33% of total 16S rRNA genes in both the Bothnian Sea and central Baltic Sea. However, at salinities above 14 PSU, acI-16S rRNA gene accounted for less than 1%. In contrast, the diversity of actR remained high. Changes in actR gene diversity were significantly correlated with salinity, oxygen, silica or abundance of Synechococcus sp. Our results demonstrate a wide distribution of freshwater actR along the Baltic Sea salinity gradient indicating that some freshwater Actinobacteria might have adapted to higher salinities.

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Section: Relation Of Actr Distribution Patterns To Biotic and Abioticmentioning

confidence: 99%

Distribution of acI‐Actinorhodopsin genes in Baltic Sea salinity gradients indicates adaptation of facultative freshwater photoheterotrophs to brackish waters

Salka

Wurzbacher

Garcia

et al. 2013

Environmental Microbiology

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“…The Three Gorges Dam (TGD) on the Yangtze River of China (6300 kilometers long) is one of the largest irrigation and hydroelectric engineering projects in the world, and its construction has resulted in ecological consequences such as biodiversity reduction and eutrophication in the TGD reservoir (TGDR) (Wu et al ., ; Xu and Milliman, ). Previous studies have shown that microbial communities in the river changed in response to altered physicochemical conditions (Jiang et al ., ; Wang et al ., ; Yan et al ., ). However, little is known about the relative importance of downstream dispersal versus local environmental condition in shaping the spatial distribution of microbial community along the Yangtze River, especially for those microbial functional groups that are sensitive to nutrient level fluctuation.…”

Section: Introductionmentioning

confidence: 99%

Relative importance of advective flow versus environmental gradient in shaping aquatic ammonium oxidizers near the Three Gorges Dam of the Yangtze River, China

Huang

Dong

Jiang

et al. 2016

Environ Microbiol Rep

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Construction of a dam in a large river alters its hydrodynamic condition and geochemical gradient, but the effect of such anthropogenic activity on microbial ecology remains poorly understood. To assess this effect, we investigated the relative importance of advective flow versus environmental condition in shaping ammonia oxidizing bacteria (AOB) and archaea (AOA) community from 110 km upstream to the Three Gorges Dam (TGD) of the Yangtze River, China. Water physicochemical conditions, including turbidity, conductivity, redox state and nutrient level, were fairly constant from 110 to 45 km upstream of the TGD, but significantly oscillated near the dam. AOB and AOA in the Yangtze River were dominated by Nitrosospira- and Nitrosopumilus-affiliated clusters, respectively, and these compositions were invariant throughout the sampled 110 km flow path, suggesting that AOB and AOA communities in the river were largely transported from upstream by advection with minor local and transient inputs from surrounding soils and tributaries. However, the abundance of AOB and AOA was influenced by local geochemical conditions, possibly via the growth/decay mechanisms. The source of AOB in the Yangtze River appeared to be derived from soil near the headwater, but its abundance was enhanced during downstream transport, likely due to survival and growth.

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“… Jaccard similarity-based cluster analysis showing the differences between actinobacterial 16S rRNA gene clone libraries of the QTP cold springs in this study and those from hot springs on the QTP ( Jiang et al, 2012a ), (hyper-)saline lakes on the QTP ( Jiang et al, 2010a ), freshwater sample of Daotang river on the QTP ( Jiang et al, 2012b ), Tengchong hot springs of Yunnan Province, China ( Song et al, 2009 ), Atlantic ocean deep-sea sediment in the edge of the Saharan debris flow near the Canary Islands ( Stach et al, 2003 ), and waters near the Three Gorges Dam in the middle reach of the Yangtze River ( Jiang et al, 2012b ) . …”

Section: Resultsmentioning

confidence: 73%

“…In order to compare the actinobacterial community composition difference between the QTP cold springs and other related habitats, reference actinobacterial clone sequences from Tibetan hot springs ( Jiang et al, 2012a ), Tibetan (hyper-)saline lakes ( Jiang et al, 2010a ), freshwater sample of Daotang river ( Jiang et al, 2010a ), Atlantic ocean deep-sea sediment ( Stach et al, 2003 ), the Three Gorges Dam of the Yangtze River ( Jiang et al, 2012b ) and Tengchong hot springs ( Song et al, 2009 ) were downloaded from the GenBank database and combined with the ones obtained in this study. In order to avoid any bias resulting from different primers, only actinobacterial 16S rRNA sequences amplified from the same primer set and PCR protocol as this study were included in subsequent analysis.…”

Section: Methodsmentioning

confidence: 99%

Actinobacterial Diversity in the Sediments of Five Cold Springs on the Qinghai-Tibet Plateau

Yang

Huang

et al. 2015

Front. Microbiol.

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The actinobacterial diversity was investigated in the sediments of five cold springs in Wuli region on the Qinghai-Tibet Plateau using 16S rRNA gene phylogenetic analysis. The actinobacterial communities of the studied cold springs were diverse and the obtained actinobacterial operational taxonomic units were classified into 12 actinobacterial orders (e.g., Acidimicrobiales, Corynebacteriales, Gaiellales, Geodermatophilales, Jiangellales, Kineosporiales, Micromonosporales, Micrococcales, Nakamurellales, Propionibacteriales, Pseudonocardiales, Streptomycetales) and unclassified Actinobacteria. The actinobacterial composition varied among the investigated cold springs and were significantly correlated (r = 0.748, P = 0.021) to environmental variables. The actinobacterial communities in the cold springs were more diverse than other cold habitats on the Tibetan Plateau, and their compositions showed unique geographical distribution characteristics. Statistical analyses showed that biogeographical isolation and unique environmental conditions might be major factors influencing actinobacterial distribution among the investigated cold springs.

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The Response of Potentially Active Planktonic Actinobacteria to the Construction of Three Gorges Dam of the Yangtze River, China

Cited by 4 publications

References 27 publications

Distribution of acI‐Actinorhodopsin genes in Baltic Sea salinity gradients indicates adaptation of facultative freshwater photoheterotrophs to brackish waters

Distribution of acI‐Actinorhodopsin genes in Baltic Sea salinity gradients indicates adaptation of facultative freshwater photoheterotrophs to brackish waters

Relative importance of advective flow versus environmental gradient in shaping aquatic ammonium oxidizers near the Three Gorges Dam of the Yangtze River, China

Actinobacterial Diversity in the Sediments of Five Cold Springs on the Qinghai-Tibet Plateau

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