Element concentrations in cold-water gorgonians and black coral from Azores region

Raimundo, Joana; Vale, Carlos; Caetano, Miguel; Anes, Bárbara; Carreiro‐Silva, Marina; Martins, Inês; Matos, V. de; Porteiro, Filipe M.

doi:10.1016/j.dsr2.2013.01.012

Cited by 16 publications

(21 citation statements)

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“…The black coral Leiopathes glaberrima has also been cited as a species that thrives especially on exposed, steep rocky bench terraces or platforms (Bo et al, ; Mytilineou et al, ), or among white coral reefs (Angeletti et al, ; D'Onghia et al, ; Mastrototaro et al, ). Similarly, the occurrence of gorgonian species, such as Acanthogorgia hirsuta and Swiftia pallida , have been previously described on exposed rocks and boulders, showing a distribution ranging from circalittoral to bathyal zones (Grinyó et al, ; Raimundo et al, ; Wilding & Wilson, ). On the other hand, habitat 8 was the only habitat that was typified by sponges.…”

Section: Discussionmentioning

confidence: 59%

Benthic habitat modelling and mapping as a conservation tool for marine protected areas: A seamount in the western Mediterranean

Torriente

González-Irusta

Aguilar³

et al. 2019

Aquatic Conservation

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1. An ecologically representative, well-connected, and effectively managed system of marine protected areas (MPAs) has positive ecological and environmental effects as well as social and economic benefits. Although progress in expanding the coverage of MPAs has been made, the application of management tools has not yet been implemented in most of these areas.2. In this work, distribution models were applied to nine benthic habitats on a Mediterranean seamount within an MPA for conservation purposes. Benthic habitat occurrences were identified from 55 remotely operated vehicle (ROV) transects, at depths from 76 to 700 m, and data derived from multibeam bathymetry. Generalized additive models (GAMs) were applied to link the presence of each benthic habitat to local environmental proxies (depth, slope, backscatter, aspect, and bathymetric position index, BPI).3. The main environmental drivers of habitat distribution were depth, slope, and BPI.Based on this result, five different geomorphological areas were distinguished. A full coverage map indicating the potential benthic habitat distribution on the seamount was obtained to inform spatial management. The distribution of those habitats identified as vulnerable marine ecosystems (VMEs)was used to make recommendations on zonation for developing the management plan of the MPA. This process reveals itself as an appropriate methodological approach that can be developed in other areas of the Natura 2000 marine network.

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Section: Discussionmentioning

confidence: 59%

Benthic habitat modelling and mapping as a conservation tool for marine protected areas: A seamount in the western Mediterranean

Torriente

González-Irusta

Aguilar³

et al. 2019

Aquatic Conservation

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“…Trace-element contents in skeletal corals have been used to reconstruct oceanographic conditions [73], but there is very limited information on baseline levels of trace elements in CWCs [7], particularly in cold-seep areas. This study provides the first reported trace-element contents in the fossil CWCs Crispatotrochus sp., Enallopsammia sp., and Solenosmilia sp., collected at SCS cold seeps.…”

Section: Cwc Trace-element Contentsmentioning

confidence: 99%

“…It is considered that the uptake and accumulation of elements in corals during metabolic and physiological processes are influenced by the ambient environmental conditions, including organic matter availability, salinity, production cycle, and seawater temperature [75]. Trace element contents in CWCs that live in non-seep settings tend to be fairly low under the conditions of their typical habitat without an additional source of metal elements [7,76].…”

Section: Cwc Trace-element Contentsmentioning

confidence: 99%

“…Previous studies of CWCs have focused mainly on the geochemical record of deep-ocean changes archived in their skeletons [2,7]. Accurate dating by uranium-series disequilibrium and 14 C systems are facilitated by the high contents of U in their aragonitic skeletons [8][9][10][11][12][13].Various geochemical proxies, including isotopes of carbon, oxygen, and neodymium, rare-earth elements (REEs), trace elements, and Ba/Ca, Mg/Ca and Sr/Ca ratios of CWC skeletons are commonly used to reveal oceanic processes such as carbon cycling [14,15], past water-mass changes [16][17][18], hydrothermal activity [7], changes in water temperature [19], and ocean acidification [20].…”

Section: Introductionmentioning

confidence: 99%

“…Trace-element contents of CWCs from site GMGS2-09B. Published data from modern CWCs[2,7,76,77] and CWCs in a hydrothermal site[7] are included for comparison.…”

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confidence: 99%

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Cold-Water Corals in Gas Hydrate Drilling Cores from the South China Sea: Occurrences, Geochemical Characteristics and Their Relationship to Methane Seepages

Deng

Fang

et al. 2019

Minerals

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Cold-water corals (CWCs) are frequently found at cold seep areas. However, the relationship between fluid seepage and CWC development is not clear. Here, for the first time, we report the occurrences, species identification, mineralogy, carbon and oxygen isotopes, as well as elemental compositions of fossil CWC skeletons from gas-hydrate-bearing sediment in drilling cores from the South China Sea (SCS). Three sites (GMGS-08, GMGS-09B, and GMGS-16) were investigated but CWCs were only found at one site (GMGS-09B). Interestingly, the CWCs were found in three horizons and they were all embedded with authigenic carbonates. Three genera of fossil CWCs (Crispatotrochus sp., Solenosmilia sp. and Enallopsammia sp.) were identified. The CWC fragments are predominantly aragonite. The CWCs exhibit δ13C values between −8.4‰ and −0.6‰ that are significantly higher than δ13C values of the associated seep carbonates (δ13C values with an average of −55.6‰, n = 19), which indicates a carbon source other than methane for the CWCs. It appears that authigenic carbonates provide a substratum for coral colonization. Bathymetric high points, appropriate water temperature and stronger bottom-water currents at site GMGS-09B might be crucial to keep conditions favorable for the growth of CWCs in the studied area. In addition, high trace-element concentrations of Cr, Ni, Pb, U, Ba, Th, and Sr suggest that the CWCs are influenced by strong fluid seepage that can reach the water-sediment interface, and associated microbial activity. Hence, it also becomes evident that CWCs in hydrocarbon-rich seepage areas not only provide a critical constraint on the impact of fluid emission on the bottom water chemistry, but also are likely to be very precise recorders of the end time of cold seep activity.

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Growth Patterns in Long-Lived Coral Species

Galli¹,

Abid²,

Priori³

et al. 2016

Marine Animal Forests

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Element concentrations in cold-water gorgonians and black coral from Azores region

Cited by 16 publications

References 50 publications

Benthic habitat modelling and mapping as a conservation tool for marine protected areas: A seamount in the western Mediterranean

Benthic habitat modelling and mapping as a conservation tool for marine protected areas: A seamount in the western Mediterranean

Cold-Water Corals in Gas Hydrate Drilling Cores from the South China Sea: Occurrences, Geochemical Characteristics and Their Relationship to Methane Seepages

Growth Patterns in Long-Lived Coral Species

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