Rapid respiratory responses of the deep-water sponge Geodia barretti exposed to suspended sediments

Tjensvoll, Ingrid; Kutti, Tina; Fosså, Jan Helge; Bannister, Raymond

doi:10.3354/ab00522

Cited by 69 publications

(75 citation statements)

References 45 publications

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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 However, data on East-Mediterranean sponge communities are scarce, outdated, and mostly concern the shallow waters.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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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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“…Results from this study and records of sponge by-catch from the IMR ground fish trawl surveys (Tjensvoll et al, 2013) support earlier findings that demosponges can occur at very high abundances in the northern Atlantic, particularly on the continental shelf breaks, in areas favorable for settlement, growth and food supply of suspension feeding fauna (Bett, 2001;Klitgaard and Tendal, 2004;Murillo et al 2012). Total sponge abundance and biomass in Traenadypet almost reached that of the sponge populations of tropical barrier reefs where sponges are regarded as key organisms in the ecosystems and have been intensively studied (Wilkinson and Cheshire, 1990;Bannister et al 2007Bannister et al , 2010Whalan et al, 2007a, b).…”

Section: Distribution and Patchiness In Species Compositionmentioning

confidence: 98%

“…Assuming that the average biomass of G. barretti found in the examined plots is representative of the whole MPA the results suggests that within this 300 km 2 area the population of G. barretti could filter 250 million m 3 of water and consume 60 t of carbon each 24 h and through this have a considerable influence on carbon and nutrient cycling in the benthic boundary layer (BBL). The dominance of demosponges in several regions of the Norwegian shelf merits further investigations quantifying nutrient dynamics of Norwegian sponge aggregations (Zenkevitch, 1963;Klitgaard and Tendal, 2004;Tjensvoll et al, 2013).…”

Section: Ecological Function Of Osturmentioning

confidence: 99%

Community structure and ecological function of deep-water sponge grounds in the Traenadypet MPA—Northern Norwegian continental shelf

Kutti

Bannister

Fosså

2013

Continental Shelf Research

123

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“…During the cruise, five specimen of G. barretti were collected with the ROV, and their individual volume (through water displacement) and wet weight was measured. Dry weight biomass was calculated from wet weight using a 0.2 conversion factor determined from previous measurements on Geodia sponges (Tjensvoll et al, 2013;Kutti et al, 2014).…”

Section: Biological Data On Corals and Spongesmentioning

confidence: 99%

Cold-water coral reefs and adjacent sponge grounds: hotspots of benthic respiration and organic carbon cycling in the deep sea

et al. 2015

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Cold-water coral reefs and adjacent sponge grounds are distributed widely in the deep ocean, where only a small fraction of the surface productivity reaches the seafloor as detritus. It remains elusive how these hotspots of biodiversity can thrive in such a food-limited environment, as data on energy flow and organic carbon utilization are critically lacking. Here we report in situ community respiration rates for cold-water coral and sponge ecosystems obtained by the non-invasive aquatic Eddy Correlation technique. Oxygen uptake rates over coral reefs and adjacent sponge grounds in the Traena Coral Field (Norway) were 9-20 times higher than those of the surrounding soft sediments. These high respiration rates indicate strong organic matter consumption, and hence suggest a local focusing onto these ecosystems of the downward flux of organic matter that is exported from the surface ocean. Overall, our results show that coral reefs and adjacent sponge grounds are hotspots of carbon processing in the food-limited deep ocean, and that these deep-sea ecosystems play a more prominent role in marine biogeochemical cycles than previously recognized.

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Rapid respiratory responses of the deep-water sponge Geodia barretti exposed to suspended sediments

Cited by 69 publications

References 45 publications

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

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

Community structure and ecological function of deep-water sponge grounds in the Traenadypet MPA—Northern Norwegian continental shelf

Cold-water coral reefs and adjacent sponge grounds: hotspots of benthic respiration and organic carbon cycling in the deep sea

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