Examining the diversity of microbes in a deep-sea coral community impacted by the Deepwater Horizon oil spill

Simister, Rachel L.; Antzis, E W.; White, Helen K.

doi:10.1016/j.dsr2.2015.01.010

Cited by 21 publications

(17 citation statements)

References 80 publications

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“…individual from the Antarctic (Rodríguez-Marconi et al, 2015). In addition, the order Nitrosomonadales has also been detected in deep-sea coral and sponge communities, although at relatively low abundances (Kennedy et al, 2014;Simister et al, 2016). Finally, the presence of a potentially novel and sponge-specific bacterium (i.e., low BLAST similarity to known bacterial 16S rRNA gene sequences), which is predominant in H. balfourensis, suggests that certain bacterial symbionts are potentially highly adapted to their specific spongehost and its metabolic as well as chemical environment.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, the sponge I. bentarti exhibited a wide range of predicted xenobiotic degradation pathways that encompass several organic compound classes, such as alkylbenzenes, chlorinated alkenes, chloroarenes, organochlorides, or naphtalenes. Many derivatives of these compound classes are known contaminants and pollutants due to their (geno)toxic properties (Singh, 2012). Local enrichment of pollutants could explain the predicted differential xenobiotic degradation pathway patters.…”

Section: Discussionmentioning

confidence: 99%

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Prokaryotic Diversity and Community Patterns in Antarctic Continental Shelf Sponges

et al. 2019

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Marine sponges (Phylum Porifera) are globally distributed within marine and freshwater ecosystems. In addition, sponges host dense and diverse prokaryotic communities, which are potential sources of novel bioactive metabolites and other complex compounds. Those sponge-derived natural products can span a broad spectrum of bioactivities, from antibacterial and antifungal to antitumor and antiviral compounds. However, most analyses concerning sponge-associated prokaryotes have mainly focused on conveniently accessible relatively shallow sampling locations for sponges. Hence, knowledge of community composition, host-relatedness and biotechnological potential of prokaryotic associations in temperate and cold-water sponges from greater depths (mesophotic to mesopelagic zones) is still scarce. Therefore, we analyzed the prokaryotic community diversity of four phylogenetically divergent sponge taxa from mesophotic to mesopelagic depths of Antarctic shelf at different depths and locations in the region of the South Shetland Islands using 16S rRNA gene ampliconbased sequencing. In addition, we predicted functional profiles applying Tax4Fun from metagenomic 16S rRNA gene data to estimate their biotechnological capability and possible roles as sources of novel bioactive compounds. We found indications that cold and deep-water sponges exhibit host-specific prokaryotic communities, despite different sampling sites and depths. Functional prediction analysis suggests that the associated prokaryotes may enhance the roles of sponges in biodegradation processes of xenobiotics and their involvement in the biosynthesis of secondary metabolites.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Prokaryotic Diversity and Community Patterns in Antarctic Continental Shelf Sponges

et al. 2019

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“…However, there are differences to the communities reported from marine oil spills: β-proteobacteria, including Burkholderiales, which commonly occur in oxic-seawater near oil seep sites 38 are absent, while γ-proteobacteria are of low abundance in shallow samples and absent in deeper samples. The low abundance of γ-proteobacteria and greater relative abundance of α-proteobacteria in the deepest samples is consistent with α-proteobacteria supplanting γ-proteobacteria during the later stages of petroleum degradation, after the lighter substrates have been removed 39 .…”

Section: Stable Isotopic Composition Stable Carbon Isotope Ratios Camentioning

confidence: 74%

“…A single sample (J20R 18.5 mbsf) had 0.5% archaea and 0.5% δ-proteobacteria (possible sulphate reducing bacteria), but aside from this the interior of the microdolomites appears to be a microhabitat distinct from that typically found at shallow sites of methane seepage. Instead, phylogenetic analysis suggests the microdolomites grew in a microhabitat similar to that hosted by deep gas hydrates 37 and by marine oil spills 38 . For example, Sphingomonadales is present in all samples, and there is a notable predominance of α-proteobacteria in the deepest microdolomites (Rhizobiales makes up 50% of the microbial abundance in J25R 53.91 mbsf, compared to 17.9% for other α-proteobacteria in shallower samples).…”

Section: Stable Isotopic Composition Stable Carbon Isotope Ratios Camentioning

confidence: 99%

Evidence in the Japan Sea of microdolomite mineralization within gas hydrate microbiomes

Snyder

Matsumoto

Suzuki

et al. 2020

Sci Rep

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Over the past 15 years, massive gas hydrate deposits have been studied extensively in Joetsu Basin, Japan Sea, where they are associated primarily with active gas chimney structures. our research documents the discovery of spheroidal microdolomite aggregates found in association with other impurities inside of these massive gas hydrates. the microdolomites are often conjoined and show dark internal cores occasionally hosting saline fluid inclusions. Bacteroidetes sp. are concentrated on the inner rims of microdolomite grains, where they degrade complex petroleum-macromolecules present as an impurity within yellow methane hydrate. these oils show increasing biodegradation with depth which is consistent with the microbial activity of Bacteroidetes. further investigation of these microdolomites and their contents can potentially yield insight into the dynamics and microbial ecology of other hydrate localities. if microdolomites are indeed found to be ubiquitous in both present and fossil hydrate settings, the materials preserved within may provide valuable insights into an unusual microhabitat which could have once fostered ancient life. The Umitaka Spur and Joetsu Knoll are well-known gas chimneys and sites of submarine methane seepage, situated on the western margin of the Japan Sea, offshore Niigata in Joetsu Basin (Fig. 1) 1,2. The hydrocarbons from both sites are primarily thermogenic and accumulated as a result of the release of fluid overpressure that developed over the past 5 Ma in organic-rich Middle Miocene sediments 3,4. In 2004, Umitaka Spur became the first site in the Japan Sea where gas hydrates were recovered and subsequent investigations have focused on: the chemistry of gas hydrates and seep gasses 5 , the formation of carbonate nodules and concretions (Methane Derived Authigenic Carbonates or MDACs) 6-9 and the influence of gas seeps and gas hydrates on interstitial waters in the surrounding sediments 10-15. Expeditions to the Joetsu Basin by the R/V Hakurei in 2014 (HR14) and R/V Poseidon in 2015 (PS15) recovered cores, several metres in length, that contained intact massive methane hydrate that was relatively uncontaminated by surrounding sediment (Fig. 2a,b) 16. Ongoing research, including U/Th dating of associated MDACs 6,7 and other sedimentological considerations 8 , suggest that these thick hydrate accumulations formed fairly rapidly at shallow sediment depths, and have been subsequently buried over time scales of tens of thousands of years. Gas hydrates in the Joetsu Basin have been studied for over a decade, but it was not until routine hydrate dissociation experiments during the PS15 cruise that a cloudy residue was noted in the hydrate water (Fig. 2c). This residue was found in hydrates dissociated shipboard and later in archived gas hydrate stored in liquid nitrogen from the same and previous cruises. Using powered X-ray diffraction, the residue was shown to comprise pure microdolomite, in the form of microscopic spheroidal aggregates recoverable without any special separation procedur...

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“…Following the DWH oil spill, the microbial community of the deep-water column of the GoM was significantly altered and remained in this altered state after the conclusion of the spill 25,62 . In addition, the microbial community of the floc found on CWCs and in the surrounding sediments following the DWH showed evidence of microbial phylotypes with associated genes capable of oil degradation 63 . While the microbial community and its influence on coral health has been more thoroughly characterized for shallow-water corals, it is likely equally significant for CWCs.…”

Section: Discussionmentioning

confidence: 99%

Cold-water coral (Lophelia pertusa) response to multiple stressors: High temperature affects recovery from short-term pollution exposure

Weinnig

Gómez

Hallaj

et al. 2020

Sci Rep

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There are numerous studies highlighting the impacts of direct and indirect stressors on marine organisms, and multi-stressor studies of their combined effects are an increasing focus of experimental work. Lophelia pertusa is a framework-forming cold-water coral that supports numerous ecosystem services in the deep ocean. These corals are threatened by increasing anthropogenic impacts to the deep-sea, such as global ocean change and hydrocarbon extraction. This study implemented two sets of experiments to assess the effects of future conditions (temperature: 8 °C and 12 °C, pH: 7.9 and 7.6) and hydrocarbon exposure (oil, dispersant, oil + dispersant combined) on coral health. Phenotypic response was assessed through three independent observations of diagnostic characteristics that were combined into an average health rating at four points during exposure and recovery. In both experiments, regardless of environmental condition, average health significantly declined during 24-hour exposure to dispersant alone but was not significantly altered in the other treatments. In the early recovery stage (24 hours), polyp health returned to the pre-exposure health state under ambient temperature in all treatments. However, increased temperature resulted in a delay in recovery (72 hours) from dispersant exposure. These experiments provide evidence that global ocean change can affect the resilience of corals to environmental stressors and that exposure to chemical dispersants may pose a greater threat than oil itself. The combination of human population growth and global industrial development is driving potentially irreversible anthropogenic impacts on the natural world. The current rate and scale of human development is unparalleled, and evidence has shown that human actions are altering the global climate and environment at startling rates 1-4. Increased atmospheric CO 2 concentrations contribute to both a decrease in global ocean pH (i.e. ocean acidification) as well as an increase in ocean temperatures 5-7. Sea surface temperatures have increased on average by 0.6 °C over the past 100 years and models suggest that the deep-sea is warming in some areas at a rate of 0.01-0.1 °C per decade 4,8,9. The oceans' surface and bathyal depths (200-4,000 m) are likely to experience increases in temperature of up to 4 °C by 2100 4,10,11. Furthermore, the ocean's continuous absorption of excess atmospheric CO 2 results in a decrease in pH; the surface ocean pH is already 0.1 units lower than preindustrial times and may decline by another 0.3-0.4 units by 2100 12-14. In addition to a changing global climate, human activities continue to expose oceanic environments to a wide range of pollutants 15. Hydrocarbon pollution is one of the most common and widespread forms of marine pollution and can have long-standing effects on marine environments despite standing regulations and monitoring efforts 16. Upwards of 1.3 million tons of oil is released annually into marine environments; however, roughly 47% of the oil released is from natural seep...

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Examining the diversity of microbes in a deep-sea coral community impacted by the Deepwater Horizon oil spill

Cited by 21 publications

References 80 publications

Prokaryotic Diversity and Community Patterns in Antarctic Continental Shelf Sponges

Prokaryotic Diversity and Community Patterns in Antarctic Continental Shelf Sponges

Evidence in the Japan Sea of microdolomite mineralization within gas hydrate microbiomes

Cold-water coral (Lophelia pertusa) response to multiple stressors: High temperature affects recovery from short-term pollution exposure

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