Population density and predators of Ophiacantha fidelis (Koehler, 1930) (Echinodermata : Ophiuroidea) on the continental slope of Tasmania

Blaber, S. J. M.; May, JL; Young, JW; Bulman, CM

doi:10.1071/mf9870243

Cited by 19 publications

(7 citation statements)

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“…Brittle stars are abundant megabenthic taxa in several habitats such as conti− nental slopes and the deep sea floor (Blaber et al 1987;Smith and Hamilton 1988;Piepenburg 1989;Piepenburg and Juterzenka 1994) and they constitute a signifi− cant proportion of the biomass on coral reefs (Wray 1999). A total of 241 ophiuroid species has been recorded from the North Atlantic, 180 of which have been reported from bathyal depths (Stöhr et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Molecular Species Delimitation of Icelandic Brittle Stars (Ophiuroidea)

Khodami¹,

Arbizu²,

Stöhr³

et al. 2014

Polish Polar Research

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Brittle stars (Echinodermata: Ophiuroidea) comprise over 2,000 species, all of which inhabit marine environments and can be abundant in the deep sea. Morphological plasticity in number and shape of skeletal parts, as well as variable colors, can complicate correct species identification. Consequently, DNA sequence analysis can play an important role in species identification. In this study we compared the genetic variability of the mito− chondrial cytochrome c subunit I gene (COI) and the nuclear small subunit ribosomal DNA (SSU, 18S rDNA) to morphological identification of 66 specimens of 11 species collected from the North Atlantic in Icelandic waters. Also two species delimitation tools, Automatic Barcode Gap Discovery (ABGD) and General Mixed Yule Coalescence Method (GMYC) were performed to test species hypotheses. The analysis of both gene fragments was suc− cessful to discriminate between species and provided new insights into some morphological species hypothesis. Although less divergent than COI, it is helpful to use the SSU region as a complementary fragment to the barcoding gene.

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Section: Introductionmentioning

confidence: 99%

Molecular Species Delimitation of Icelandic Brittle Stars (Ophiuroidea)

Khodami¹,

Arbizu²,

Stöhr³

et al. 2014

Polish Polar Research

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“…The highest CaCO 3 contribution beyond neritic waters is from ophiuroids, which are known to dominate various habitats in the shelves, slopes, and deep sea (Smith and Hamilton 1983, Blaber et al 1987, Shin and Koh 1993). They have been especially ascribed to the upper continental slope (; see Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, the records are potentially biased toward those locations where more samples have been collected, and places such as the Arctic Ocean, Southern Ocean, and the east Pacific are probably undersampled. Another substantial source of uncertainty and lack of data is the deep waters, where ophiuroids, for example, are known to exist at high densities (Blaber et al 1987, Metaxas and Giffin 2004).…”

Section: Echinoderms Carbon Measurementsmentioning

confidence: 99%

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Global contribution of echinoderms to the marine carbon cycle: CaCO₃ budget and benthic compartments

Lebrato

Iglesias-Rodríguez

Feely

et al. 2010

Ecological Monographs

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Abstract. The contribution of carbonate-producing benthic organisms to the global marine carbon budget has been overlooked, the prevailing view being that calcium carbonate (CaCO 3 ) is predominantly produced and exported by marine plankton in the ''biological pump.'' Here, we provide the first estimation of the global contribution of echinoderms to the marine inorganic and organic carbon cycle, based on organism-level measurements from species of the five echinoderm classes. Echinoderms' global CaCO 3 contribution amounts to ;0.861 Pg CaCO 3 /yr (0.102 Pg C/yr of inorganic carbon) as a production rate, and ;2.11 Pg CaCO 3 (0.25 Pg C of inorganic carbon) as a standing stock from the shelves, slopes, and abyssal depths. Echinoderm inorganic carbon production (0.102 Pg C/yr) is less than the global pelagic production (0.4-1.8 Pg C/yr) and similar to the estimates for carbonate shelves globally (0.024-0.120 Pg C/yr Áyr À1 as inorganic carbon) for the slope on a global scale. The biogeography of the CaCO 3 standing stocks of echinoderms showed strong latitudinal variability. More than 80% of the global CaCO 3 production from echinoderms occurs between 0 and 800 m, with the highest contribution attributed to the shelf and upper slope. We provide a global distribution of echinoderm populations in the context of global calcite saturation horizons, since undersaturated waters with respect to mineral phases are surfacing. This shallowing is a direct consequence of ocean acidification, and in some places it may reach the shelf and upper slope permanently, where the highest CaCO 3 standing stocks from echinoderms originate. These organism-level data contribute substantially to the assessment of global carbonate inventories, which at present are poorly estimated. Additionally, it is desirable to include these benthic compartments in coupled global biogeochemical models representing the ''biological pump'' and its feedbacks, since at present all efforts have focused on pelagic processes, dominated by coccolithophores. The omission of the benthic processes from modeling will only diminish the understanding of elemental fluxes at large scales and any future prediction of climate change scenarios.

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“…Extensive, dense populations of modern epibenthic ophiuroids are nearly exclusively restricted to the bathyal zone (depths of between 200 and 3000 m: Blaber et al 1987;Fujita & Ohta 1989;Fujita 1992;Gage & Brey 1994). In shallower environments, very rare, small, patchy aggregations of epibenthic ophiuroids have been documented in the infralittoral zone (depths of between 10 and 50 m), as for example on the SW coast of England (Warner 1971;Broom 1975), or in a salt lake of the Bahamas (Aronson & Harms 1995;Aronson & Blake 1997).…”

Section: Autecology Of Ophiuroids and Stylophoransmentioning

confidence: 99%

A mixed ophiuroid—stylophoran assemblage (Echinodermata) from the Middle Ordovician (Llandeilian) of western Brittany, France

Hunter

Lefèbvre

Régnault³

et al. 2007

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In the abandoned slate quarry ofGuernanic, Gourin (Morbihan, France), a single horizon (Upper Member of the Schistes de Postolonnec Formation) has yielded an exquisitely preserved Llandeilian (Middle Ordovician) echinoderm assemblage composed of the ophiuroid Taeniaster armoricanus sp. nov. and the mitrate Mitrocystella incipiens. These two groups of echinoderms represent the first fossils formally described from the Middle

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Population density and predators of Ophiacantha fidelis (Koehler, 1930) (Echinodermata : Ophiuroidea) on the continental slope of Tasmania

Cited by 19 publications

References 0 publications

Molecular Species Delimitation of Icelandic Brittle Stars (Ophiuroidea)

Molecular Species Delimitation of Icelandic Brittle Stars (Ophiuroidea)

Global contribution of echinoderms to the marine carbon cycle: CaCO₃ budget and benthic compartments

A mixed ophiuroid—stylophoran assemblage (Echinodermata) from the Middle Ordovician (Llandeilian) of western Brittany, France

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Population density and predators of Ophiacantha fidelis (Koehler, 1930) (Echinodermata : Ophiuroidea) on the continental slope of Tasmania

Cited by 19 publications

References 0 publications

Molecular Species Delimitation of Icelandic Brittle Stars (Ophiuroidea)

Molecular Species Delimitation of Icelandic Brittle Stars (Ophiuroidea)

Global contribution of echinoderms to the marine carbon cycle: CaCO3 budget and benthic compartments

A mixed ophiuroid—stylophoran assemblage (Echinodermata) from the Middle Ordovician (Llandeilian) of western Brittany, France

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Global contribution of echinoderms to the marine carbon cycle: CaCO₃ budget and benthic compartments