Sub-lethal effects of water-based drilling muds on the deep-water sponge Geodia barretti

Edge, Katelyn J.; Johnston, Emma L.; Dafforn, Katherine A.; Simpson, Stuart L.; Kutti, Tina; Bannister, Raymond

doi:10.1016/j.envpol.2016.02.047

Cited by 35 publications

(28 citation statements)

References 55 publications

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“…Lysosomal membrane stability was measured on freshly cut sponge tissue following standard methods 52, 53 modified for sponges 54 . Approximately 1 cm 3 of choanosome was excised from each explant, rinsed and stored in seawater for a maximum of 1 h. Tissue was further minced into 1 mm 3 pieces which were placed into a single well of a 24-well culture plate with 1 ml of Ca 2+ /Mg 2+ free saline (CMFS) and agitated in a shaker at 120 rpm for 30 min.…”

Section: Methodsmentioning

confidence: 99%

The response of a boreal deep-sea sponge holobiont to acute thermal stress

Strand

Whalan

Webster

et al. 2017

Sci Rep

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Effects of elevated seawater temperatures on deep-water benthos has been poorly studied, despite reports of increased seawater temperature (up to 4 °C over 24 hrs) coinciding with mass mortality events of the sponge Geodia barretti at Tisler Reef, Norway. While the mechanisms driving these mortality events are unclear, manipulative laboratory experiments were conducted to quantify the effects of elevated temperature (up to 5 °C, above ambient levels) on the ecophysiology (respiration rate, nutrient uptake, cellular integrity and sponge microbiome) of G. barretti. No visible signs of stress (tissue necrosis or discolouration) were evident across experimental treatments; however, significant interactive effects of time and treatment on respiration, nutrient production and cellular stress were detected. Respiration rates and nitrogen effluxes doubled in responses to elevated temperatures (11 °C & 12 °C) compared to control temperatures (7 °C). Cellular stress, as measured through lysosomal destabilisation, was 2–5 times higher at elevated temperatures than for control temperatures. However, the microbiome of G. barretti remained stable throughout the experiment, irrespective of temperature treatment. Mortality was not evident and respiration rates returned to pre-experimental levels during recovery. These results suggest other environmental processes, either alone or in combination with elevated temperature, contributed to the mortality of G. barretti at Tisler reef.

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Section: Methodsmentioning

confidence: 99%

The response of a boreal deep-sea sponge holobiont to acute thermal stress

Strand

Whalan

Webster

et al. 2017

Sci Rep

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“…In recent years explorations for natural gas and oil have been carried out along the Israeli coast of the Mediterra-nean (sometimes in proximity to these sponge grounds), with the aim of this area becoming a center for the petroleum industry. Thus, drilling lubricants and thin sediment suspended in the water column from such excavations could cover and clog the filtering apparatus of the sponges (Gerrodette et al, 1979;Tompkins-MacDonald et al, 2008;Tjensvoll et al, 2013;Edge et al, 2016). In addition, fishermen off the Israeli coast are deploying a new type of gear for deep bottom-trawling, which is specially designed to operate over rocky outcrops and can be destructive to this sensitive community.…”

Section: Discussionmentioning

confidence: 99%

Shedding light on an East-Mediterranean mesophotic sponge ground community and the regional sponge fauna

et al. 2018

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Sponges are a diverse and abundant phylum, globally occupying many hard-bottom habitats. However, data on East-Mediterranean sponge communities are scarce, outdated, and mostly concern the shallow waters. This study aimed to expand the knowledge on poriferan fauna along Israel's Mediterranean coast. A newly-discovered mesophotic sponge ground at ~100 m depth was studied using a Remotely-Operated Vehicle, while shallow-water surveys were conducted by scuba diving. In this mesophotic ecosystem, sponges serve as environmental engineers, creating complex 3D structures that attract invertebrates and fish. Quantitative surveys of the mesophotic sponge ground revealed a rich and diverse sponge community with a high percentage cover (~35%). Several mesophotic species are reported for the first time from the Levantine Sea, while others might be novel species. Here we report 111 sponge species along the Mediterranean coast of Israel (from our current surveys and previous studies), 36 of which were collected from the mesophotic habitat. The updated sponge list supports the hypothesis that the sponge diversity in the Levantine Sea is not as species-poor as previously considered. A comparison of the sponge community composition between the shallow waters and the mesophotic depth revealed only partial overlap, with merely a few species thriving along the entire depth range. The mesophotic habitat was found to harbor some species that seem to have disappeared from the shallow habitats decades ago, suggesting that the former may serve as refugia for species stressed by rising temperatures in shallow waters, and that this deeper habitat thus require protection from negative anthropogenic influences.

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“…The long-term effects of WBF in invertebrates have been described as a reduction in lysosomal membrane stability in sponges, which may begin after as little as 1 h of exposure at concentrations of 50-100 mg L -1 or after 14 days at a concentration of 30 mg L -1 (Edge et al, 2016;Table 4). Also, a decrease in Nematoda population size was observed with concentrations as low as 2.4 ppm Cd and 400 ppm Ba (Lira et al, 2011).…”

Section: Chronic Effectsmentioning

confidence: 99%

Toxicity of drilling fluids in aquatic organisms: a review

Aslan¹,

Weber²,

Iannacone³

et al. 2019

Ecotoxicol. Environ. Contam.

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Offshore oil-well drilling has been a subject of great interest to environmental regulatory agencies worldwide. The drilling fluids used in this process involve a complex mixture of chemicals and are largely discharged into the ocean. Acute and chronic toxicity tests have been done to better understand the effects of different types of drilling fluids on aquatic organisms. The aim of this article was to analyze all the studies related to the toxicity of drilling fluids published during the period of 2000 to 2017 by conducting a thorough review through the Scopus and Science Direct databases. Out of 154 articles, only 25 showed relevant information about the toxicity of drilling fluids. Acute toxicity tests were the predominant tests employed, appearing in 56% of the articles. Invertebrates were the most evaluated taxa, used in 64% of cases and represented mainly by Crustacea (32%), Mollusca (16%), and other invertebrates. Vertebrates were represented only by fish, constituting 32% of the cases. Water-based drilling fluids (WBFs) (32%) were the most frequently tested, followed by synthetic-based fluids or muds (SBFs) (24%) and oil-based fluids (OBFs) (16%). Individual components were tested in 12% of the cases, while 16% of studies included more than one type of drilling fluid. After analyzing the toxicity of drilling fluids and the sensitivity of aquatic organisms presented in 25 articles published in scientific journals, we concluded that WBFs-showing, in general, lower values of median lethal concentrations than do natural oil-and SBFs-are the most toxic drilling fluids to invertebrates in the short term. The gaps of information found in this review indicate that future studies need to address the acute and chronic effects of WBFs in both juvenile and adult fish and in other vertebrates; they also need to address the chronic effects of nonaqueous-based fluids on adult invertebrates. As crustaceans are more sensitive to drilling fluids than are mollusks, it is also recommended that they be used in future studies.

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Sub-lethal effects of water-based drilling muds on the deep-water sponge Geodia barretti

Cited by 35 publications

References 55 publications

The response of a boreal deep-sea sponge holobiont to acute thermal stress

The response of a boreal deep-sea sponge holobiont to acute thermal stress

Shedding light on an East-Mediterranean mesophotic sponge ground community and the regional sponge fauna

Toxicity of drilling fluids in aquatic organisms: a review

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