Predominant terminal electron accepting processes during organic matter degradation: Spatio-temporal changes in Ashtamudi estuary, Kerala, India

Vincent, Salom Gnana Thanga; Reshmi, Rema; Hassan, Said; Nair, K. Deepa; Varma, A. K.

doi:10.1016/j.ecss.2017.05.013

Cited by 16 publications

(6 citation statements)

References 45 publications

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“…The cycles of carbon, nitrogen and sulphur in environment are made up of a series of chemical reactions (Parey et al, 2011;Lammel et al, 2015). For the sediment containing a large amount of organic matter and being in the state of reduction, the oxidation-reduction reaction should be the most important chemical reaction (Vincent et al, 2017). The substance of the oxidation-reduction reaction is the gain or loss of electrons or the offset of share electron pair.…”

Section: Discussionmentioning

confidence: 99%

The Coupling of Carbon, Nitrogen and Sulphur Transformational Processes in River Sediments Based on Correlationship among the Functional Genes

Zhang

Sun

et al. 2018

Preprint

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Abstract. Microorganisms in sediments play an important role in C-, N- and S-cycles by regulating forms and contents of these elements. The coupled system or synergistic reaction among three elemental cycles can effectively alleviate the pollution of C, N, and S in sediments. However, ecological processes coupling C-, N- and S-cycles in sediments are still poorly understood. In order to understand the ecological processes mediated by microorganisms living in river sediments, a total of 135 sediment samples were collected from Huaihe River and its branches located in the Northern of Anhui Province, the abundance of functional marker genes (mcrA, pmoA, cmo, amoA, hzo, nirK, nirS, nosZ, dsrB, aprA), involving in C-, N- and S-transformation, were determined by qPCR. The correlation among functional genes from 135 river sediment samples was calculated. We supposed that the correlationship among functional genes could be used as a reference index speculating the coupled systems of C-N-S in this reasearch, then the distinct coupling relation of C-N-S was revealed, and probable genetic mechanisms were also expounded based on the hypothesis. The study found that amoA-AOA and dsrB possibly played a secondary role, while S-functional gene (aprA), C-functional gene (mcrA) and N-functional gene (hzo) were the key functional genes that participate in the coupled processes in the elemental biogeochemical cycle. The results also demonstrated that C, N might have combined effects on the coupling of carbon, nitrogen and sulphur transformation.

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Section: Discussionmentioning

confidence: 99%

The Coupling of Carbon, Nitrogen and Sulphur Transformational Processes in River Sediments Based on Correlationship among the Functional Genes

Zhang

Sun

et al. 2018

Preprint

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“…Zaborska et al (2016) Global climate change impacts including increasing temperatures and changing precipitation patterns and storminess may play a significant role in organic matter degradation in estuarine sediments. Vincent et al (2017) found that higher heterotrophic microbial activity appeared to be favoured by higher temperatures in the Ashtamudi estuary in Kerala, India. In addition, the contribution of organic matter and nutrient deposition to estuarine sediment via urban run-off during the monsoon season, resulted in a two-fold and five-fold increase in methanogenesis and denitrification respectively, increasing the production of the greenhouse gases nitrous oxide (N2O) and methane (CH4).…”

Section: Pollution and Contaminationmentioning

confidence: 94%

Unbounded boundaries and shifting baselines: Estuaries and coastal seas in a rapidly changing world

Little

Spencer

Schuttelaars

et al. 2017

Estuarine, Coastal and Shelf Science

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This Special Issue of Estuarine, Coastal and Shelf Science presents contributions from ECSA 55; an international symposium organised by the Estuarine and Coastal Sciences Association (ECSA) and Elsevier on the broad theme of estuaries and coastal seas in times of intense change. The objectives of the SI are to synthesise, hypothesise and illustrate the impacts of global change on estuaries and coastal seas through learning lessons from the past, discussing the current and forecasting for the of combining cross-disciplinary palaeo, contemporary and future modelling studies and; (4) the importance of shifting baselines on ecosystem functioning and the future provision of ecosystem services.

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“…Emission of greenhouse gases such as methane and nitrous oxide have showed considerable increase in polluted compared to unpolluted coastal wetlands (Purvaja and Fig. 1 Coastal wetlands of Southern India Ramesh 2001;Reshmi et al 2015;Salahudeen et al 2018;Vincent et al 2017). Increasing urbanisation coupled with poor waste management practices lead to disposal of vast quantities of urban litter in coastal wetlands, thus causing destruction of the natural ecohydrology of these systems (Sulochanan et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Coastal wetlands of India: threats and solutions

Vincent

Owens

2021

Wetlands Ecol Manage

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Predominant terminal electron accepting processes during organic matter degradation: Spatio-temporal changes in Ashtamudi estuary, Kerala, India

Cited by 16 publications

References 45 publications

The Coupling of Carbon, Nitrogen and Sulphur Transformational Processes in River Sediments Based on Correlationship among the Functional Genes

The Coupling of Carbon, Nitrogen and Sulphur Transformational Processes in River Sediments Based on Correlationship among the Functional Genes

Unbounded boundaries and shifting baselines: Estuaries and coastal seas in a rapidly changing world

Coastal wetlands of India: threats and solutions

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