Natural attenuation of contaminated marine sediments from an old floating dock Part II: Changes of sediment microbial community structure and its relationship with environmental variables

Wang, Ya-Fen; Tam, N.F.Y.

doi:10.1016/j.scitotenv.2012.01.066

Cited by 20 publications

(8 citation statements)

References 60 publications

(53 reference statements)

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“…In contrast, microeukaryotes (diatoms, fungi and protozoa) resulted more abundant in the southern stations, except from S6, where zooplanktonic biomarkers (20:1 n9, 24:1; Parrish, 2013) resulted abundant, probably due to the outward position along the transect that make it more influenced by the local currents. Increase of Gram-negative bacteria has been reported in marine sediment subjected to various stress conditions, among which PAH (Timmis et al, 2005;Castle et al, 2006;Wang and Tam, 2012) and trace element contamination (Córdova-Kreylos et al, 2006). The increased resistance and survival of Gram-negative bacteria to stressors is mainly attributable to the presence of cyclopropyl FAs that maintains higher membrane stability (Kaur et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

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Intrinsic bioremediation potential of a chronically polluted marine coastal area

Catania

Santisi

Signa

et al. 2015

Marine Pollution Bulletin

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Section: Discussionmentioning

confidence: 99%

“…Among the contaminants most commonly introduced into the marine environment, hydrocarbons can exert a selective pressure on microbial communities (e.g. Langworthy et al, 2002;Wang and Tam, 2012). Bacterial communities have therefore great potential to be used as sensitive indicators of contamination in marine sediment (Sun et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Intrinsic bioremediation potential of a chronically polluted marine coastal area

Catania

Santisi

Signa

et al. 2015

Marine Pollution Bulletin

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“…However, only very few studies have focused on the rhizosphere of salt marsh vegetation (Daane et al 2001;Mucha et al 2011) and practically none on the associated endophytic bacterial communities. Moreover, sediment properties, such as hydrocarbon contamination, organic matter content, and texture, are important drivers of bacterial community composition in coastal environments (Langworthy et al 1998;Gomes et al 2008Gomes et al , 2013Liang et al 2011;Wang & Tam 2012). However, there are a lack of studies on the influence of these parameters on the structure and function of the endophytic bacterial communities.…”

Section: Introductionmentioning

confidence: 99%

Hydrocarbon contamination and plant species determine the phylogenetic and functional diversity of endophytic degrading bacteria

et al. 2013

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Salt marsh sediments are sinks for various anthropogenic contaminants, giving rise to significant environmental concern. The process of salt marsh plant survival in such environment is very intriguing and at the same time poorly understood. The plant–microbe interactions may play a key role in the process of environment and in planta detoxification.In this study, a combination of culture-dependent and culture-independent molecular approaches [enrichment cultures, polymerase chain reaction (PCR), denaturing gradient gel electrophoresis (DGGE), DNA sequencing] were used to investigate the effect of petroleum hydrocarbons (PH) contamination on the structure and function[polycyclic aromatic hydrocarbon (PAH) dioxygenase genes] of endophytic bacterial communities of salt marsh plant species (Halimione portulacoides and Sarcocornia perennis)in the estuarine system Ria de Aveiro (Portugal). Pseudomonads dominated the cultivable fraction of the endophytic communities in the enrichment cultures. In a set of fifty isolates tested, nine were positive for genes encoding for PAH dioxygenases (nahAc)and four were positive for plasmid carrying genes encoding PAH degradation enzymes(nahAc). Interestingly, these plasmids were only detected in isolates from most severely PH-polluted sites. The results revealed site-specific effects on endophytic communities,related to the level of PH contamination in the sediment, and plant-species-specific ‘imprints’ in community structure and in genes encoding for PAH dioxygenases. These results suggest a potential ecological role of bacterial plant symbiosis in the process of plant colonization in urban estuarine areas exposed to PH contamination.

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“…Most of the lindane-degrading bacterial isolates were Gram-negative bacteria. Interestingly, an increase of Gram-negative bacteria has been reported in marine sediment subjected to various stress conditions, among which are polycyclic aromatic hydrocarbons PAH [61,62,63] and trace element contamination [64]. The resistance to stressors and survival of Gram-negative bacteria is mainly attributable to the presence of cyclopropyl fatty acids FAs that maintain higher membrane stability [65].…”

Section: Discussionmentioning

confidence: 99%

Lindane Bioremediation Capability of Bacteria Associated with the Demosponge Hymeniacidon perlevis

et al. 2017

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Lindane is an organochlorine pesticide belonging to persistent organic pollutants (POPs) that has been widely used to treat agricultural pests. It is of particular concern because of its toxicity, persistence and tendency to bioaccumulate in terrestrial and aquatic ecosystems. In this context, we assessed the role of bacteria associated with the sponge Hymeniacidon perlevis in lindane degradation. Seven bacteria isolates were characterized and identified. These isolates showed a remarkable capacity to utilize lindane as a sole carbon source leading to a percentage of residual lindane ranging from 3% to 13% after 12 days of incubation with the pesticide. The lindane metabolite, 1,3–6-pentachloro-cyclohexene, was identified as result of lindane degradation and determined by gas chromatography–mass spectrometry (GC–MS). The bacteria capable of lindane degradation were identified on the basis of the phenotypic characterization by morphological, biochemical and cultural tests, completed with 16S rDNA sequence analysis, and assigned to Mameliella phaeodactyli, Pseudovibrio ascidiaceicola, Oceanicaulis stylophorae, Ruegeria atlantica and to three new uncharacterized species. The results obtained are a prelude to the development of future strategies for the in situ bioremediation of lindane.

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Natural attenuation of contaminated marine sediments from an old floating dock Part II: Changes of sediment microbial community structure and its relationship with environmental variables

Cited by 20 publications

References 60 publications

Intrinsic bioremediation potential of a chronically polluted marine coastal area

Intrinsic bioremediation potential of a chronically polluted marine coastal area

Hydrocarbon contamination and plant species determine the phylogenetic and functional diversity of endophytic degrading bacteria

Lindane Bioremediation Capability of Bacteria Associated with the Demosponge Hymeniacidon perlevis

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