Bacterial community composition and carbon metabolism in a subtropical riverscape

Becker, Jesse C.; Rodibaugh, Kelly J.; Hahn, Dittmar; Nowlin, Weston H.

doi:10.1007/s10750-016-3058-2

Cited by 13 publications

(13 citation statements)

References 69 publications

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“…Microbial community composition has been variably demonstrated to affect microbial processes (Becker et al, 2017; de Menezes et al, 2017; Graham et al, 2016). Here partial Mantel tests showed that bacterial/archaeal community composition was significantly affecting single soil C or N processes, i.e.…”

Section: Discussionmentioning

confidence: 99%

Soil multifunctionality is affected by the soil environment and by microbial community composition and diversity

Zheng

Zhang

et al. 2019

Soil Biology and Biochemistry

287

110

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Microorganisms are critical in mediating carbon (C) and nitrogen (N) cycling processes in soils. Yet, it has long been debated whether the processes underlying biogeochemical cycles are affected by the composition and diversity of the soil microbial community or not. The composition and diversity of soil microbial communities can be influenced by various environmental factors, which in turn are known to impact biogeochemical processes. The objectives of this study were to test effects of multiple edaphic drivers individually and represented as the multivariate soil environment interacting with microbial community composition and diversity, and concomitantly on multiple soil functions (i.e. soil enzyme activities, soil C and N processes). We employed high-throughput sequencing (Illumina MiSeq) to analyze bacterial/archaeal and fungal community composition by targeting the 16S rRNA gene and the ITS1 region of soils collected from three land uses (cropland, grassland and forest) deriving from two bedrock forms (silicate and limestone). Based on this data set we explored single and combined effects of edaphic variables on soil microbial community structure and diversity, as well as on soil enzyme activities and several soil C and N processes. We found that both bacterial/archaeal and fungal communities were shaped by the same edaphic factors, with most single edaphic variables and the combined soil environment representation exerting stronger effects on bacterial/archaeal communities than on fungal communities, as demonstrated by (partial) Mantel tests. We also found similar edaphic controls on the bacterial/archaeal/fungal richness and diversity. Soil C processes were only directly affected by the soil environment but not affected by microbial community composition. In contrast, soil N processes were significantly related to bacterial/archaeal community composition and bacterial/archaeal/fungal richness/diversity but not directly affected by the soil environment. This indicates direct control of the soil environment on soil C processes and indirect control of the soil environment on soil N processes by structuring the microbial communities. The study further highlights the importance of edaphic drivers and microbial communities (i.e. composition and diversity) on important soil C and N processes.

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Section: Discussionmentioning

confidence: 99%

Soil multifunctionality is affected by the soil environment and by microbial community composition and diversity

Zheng

Zhang

et al. 2019

Soil Biology and Biochemistry

287

110

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“…The presence of high concentrations of TDS, denote the contribution of soils through the natural processes of trawling and drainage; but also, the resuspension of the sediment, which occur more frequently during rainy periods(Crim, Schoonover, & Lockaby, 2012), as happened during the months of February and April 2012, where 86.0 mm and 124.9 mm of precipitation were reported respectively. The input of the soil can contribute not only to the entry of bacteria into the river waters, but also to the entry of organic and inorganic compounds, all of which promotes changes in the struct ure of bacterial communities, as was observed in the Brazos River, Texas , USA(Becker, Rodibaugh, Hahn, & Nowlin, 2016). Moreover, resuspension of the sediment in the water column, also contributes to the changes in the structure of bacterial communities, passing sediment mi croorganisms and nutrients in the water column.…”

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confidence: 96%

Impact of chemical and microbiological water quality on bacterial community assemblage of San Juan River (Sierra del Rosario, Biosphere Reserve, Cuba)

Larrea-Murrell¹,

Bacchetti-De-Gregoris

Heydrich-Pérez

et al. 2021

Tecnol. cienc. agua

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The objective of the present study was to analyze the influence of different physicochemical and microbiological indicators on bacterial assemblages in a freshwater ecosystem located in a Biosphere Res erve.The bacterioplankton communities composition was determined by denaturing gradient gel electrophoresis (DGGE) of 16S rDNA during three sampling campaigns in three sampling stations of San Juan Ri ver.Multivariate statistical analyses of gel patterns, in relat i on t o chemi cal , biological and physical parameters were performed. The analyses showed a seasonal variation of bacterial community at the l ess pol l ut ed stations. The correspondence canonical analysis showed that total dissolved solids (TDS), E. coli concentration and dissolved oxygen were significantly influencing the DGGE profiles at San Juan River, indicating that at least two of the three sampling stations analyzed possessed good water quality. With the combination of environmental variabl es and t he DGGE molecular data it could be appreciated the influence of chemical and microbial contamination on the bacterial community of San Juan River. At the less polluted stations low concentrations of TDS and bacterial indicators of fecal contamination were related with bacterial diversity. The present investigation constitutes the first cultureindependent analysis of freshwater bacterial communities in a Biosphere Reserve of the Caribbean islands.

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“…In stream ecosystems, the processing of organic matter is another major function that bacterial communities mediate 29 . Carbon transported by streams provides a major source of energy for aquatic food webs and is a significant component of the global carbon cycle 31 , 32 , 95 .…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, anthropogenic land use can accelerate the transition of streams from transporters to transformers of carbon 31 . In stream ecosystems, a substantial portion of the organic matter are derived from terrestrial environments and serve as a substantial resource fueling riverine bacterial communities 29 . Small streams can mineralize large quantities of the organic carbon load because of the bacterial carbon metabolism, which results in increased losses of CO 2 to the atmosphere and with implications for ecosystem services 8 , 34 , 99 .…”

Section: Discussionmentioning

confidence: 99%

“…In particular, the nitrogen metabolism in streams is one of the most important ecosystem functions to remove nitrogen 24 and consequently protect downstream lakes from eutrophication. Moreover, bacteria can account for a substantial portion of the transformation and use of organic matter in riverine systems 29 , 30 , with implications for ecosystem processes, food webs, and greenhouse gases 31 . Thus, the major metabolisms in riverine systems are of importance because of the potential for riverine ecosystems to store, mineralize, and transport organic matter and nutrient before reaching the downstream aquatic ecosystems 32 – 34 .…”

Section: Introductionmentioning

confidence: 99%

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Influences of anthropogenic land use on microbial community structure and functional potentials of stream benthic biofilms

Ren

Zhang

et al. 2017

Sci Rep

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Stream ecosystems are the primary receivers of nutrient and organic carbon exported from terrestrial ecosystems and are profoundly influenced by the land use of the surrounding landscape. The aquatic impacts of anthropogenic land use are often first observed in stream benthic biofilms. We studied the benthic biofilms in streams flowing through forest (upstream) and anthropogenic land use (downstream) areas in southwestern China. The results showed that anthropogenic land use increased nutrient and organic carbon in both stream water and benthic biofilms, which are closely related to the differences in the microbial communities. The taxonomic dissimilarity of the communities was significantly correlated with the functional gene dissimilarity, and the upstream sites had more distinct functional genes. Network analysis showed that upstream sites had more highly connected microbial networks. Furthermore, downstream sites had higher relative abundances of anammox and denitrification suggesting stronger nitrogen removal than upstream sites. Increased nutrients in both the stream water and biofilms caused by anthropogenic land use had severe impacts on the nitrogen cycle in stream ecosystems. Downstream sites also had stronger carbon metabolism than upstream sites. This study provides insights into the influences of anthropogenic land use on microbial community structure and functions of stream benthic biofilms.

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Bacterial community composition and carbon metabolism in a subtropical riverscape

Cited by 13 publications

References 69 publications

Soil multifunctionality is affected by the soil environment and by microbial community composition and diversity

Soil multifunctionality is affected by the soil environment and by microbial community composition and diversity

Impact of chemical and microbiological water quality on bacterial community assemblage of San Juan River (Sierra del Rosario, Biosphere Reserve, Cuba)

Influences of anthropogenic land use on microbial community structure and functional potentials of stream benthic biofilms

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