The infauna of three widely distributed sponge species (Hexactinellida and Demospongiae) from the deep Ekström Shelf in the Weddell Sea, Antarctica

Kersken, Daniel; Göcke, Christian; Brandt, Angelika; Lejzerowicz, Franck; Schwabe, Enrico; Seefeldt, Meike Anna; Veit-Köhler, Gritta; Janussen, Dorte

doi:10.1016/j.dsr2.2014.06.005

Cited by 27 publications

(23 citation statements)

References 45 publications

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“…Rossella spp. are also important as substrate and habitat for several benthic invertebrates and juvenile fishes (Kunzmann 1996;Barthel 1997;Gutt & Schickan 1998;Kersken et al 2014). Still, despite the unquestionable high ecological importance of Rossella in the Antarctic and nearly 150 years of research, the taxonomy of Rossella and its many species remains complicated and not fully understood.…”

Section: Introductionmentioning

confidence: 99%

Rossella podagrosa Kirkpatrick, 1907—A valid species after all

Göcke

Janussen

Reiswig

et al. 2015

Zootaxa

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In this study we provide evidence that the species Rossella podagrosa Kirkpatrick, 1907, commonly considered a synonym of Rossella racovitzae Topsent, 1901, is truly a valid species. We show that it can be clearly distinguished from other species especially when taking into consideration the in situ habitus of the sponge in combination with the spicules. Furthermore we demonstrate the weaknesses in the so far published synonymy concept for the very complicated genus Rossella Carter, 1872. From this we conclude that the best strategy for further analysis of Rossella and establishment of acceptable synonymies will need to be based on detailed examination of the spicules, the holotypes, and in situ habitus. When possible it will be useful to analyze specimens from all Antarctic oceanographic regions.

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Section: Introductionmentioning

confidence: 99%

Rossella podagrosa Kirkpatrick, 1907—A valid species after all

Göcke

Janussen

Reiswig

et al. 2015

Zootaxa

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“…The Antarctic sea has a diverse and conspicuous sponge community (Klitgaard and Tendal 2004;Janussen and Tendal 2007;Göcke and Janussen 2013;Janussen and Downey 2014), and their ecological importance as hosts for diverse communities of other animals has been recently documented (Kersken et al 2014). Most of the previous studies on sponge FA compositions, summarized elsewhere by (Rezanka and Sigler 2009), where focused on species from tropical, subtropical and temperate regions.…”

Section: Introductionmentioning

confidence: 98%

Fatty acid composition and antioxidant activity of Antarctic marine sponges of the genus Latrunculia

et al. 2015

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The fatty acid composition of marine cold-water sponges of genus Latrunculia, namely Latrunculia bocagei Ridley and Dendy, 1886, and Latrunculia biformis Kirkpatrick, 1907, for which no fatty acid data had been previously reported, has been examined. High levels of longchain fatty acids (C 24-30 ) with high unsaturation levels (mainly polyunsaturation), and high incidence of branchedand odd-chain fatty acids in sponges are suggested to be partially connected with their specific cell membrane requirements to surmount the negative effects of low temperatures and to enable growth in extreme environments. Furthermore, variations in the fatty acid profile at the species level may reflect variations in compositions or quantities of symbiotic microorganisms that commonly represent up to 60 % of the sponge wet weight. The fatty acid compositions of lipid-rich sponge extracts from five Latrunculia specimens dredged from the Bransfield Strait near the Antarctic Peninsula, were obtained using supercritical carbon dioxide and analyzed using gas chromatography-mass spectrometry-flame ionization detection. Furthermore, the antioxidant activities of these extracts were determined using the photochemiluminescent method. Along with common fatty acids, the chemical analyses revealed very long-chain fatty acids (C22, C24). Differences were seen for the fatty acid levels between both species and different specimens of the same species. The observed differences do not seem connected to the habitat depth of the specimen, but rather indicate the variations within the associated microbiome. Furthermore, these sponge extracts showed antioxidant activities, confirming that they contain lipidic compounds that strongly scavenge free radicals.

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“…1), and thus increase its spatial heterogeneity (Gutt and Starmans, 1998;Janussen and Reiswig, 2009;Starmans et al, 1999;Dayton et al, 2013;Fillinger et al 2013), structure benthic communities (Barthel, 1992a,b), and locally play a major role in silicon cycling (Gatti, 2002;Gutt et al 2013). Large Rossella specimens can harbour a diverse community of invertebrates and juvenile stages of many other organisms, and serve as substratum for various taxa of other sessile invertebrates (epibionts) (Barthel, 1997;Gutt and Schickan, 1998;Kunzmann, 1996;Kersken et al, 2014). From a morphological perspective, Rossella is characterized by the presence of calycocomes ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Nuclear and mitochondrial phylogeny ofRossella(Hexactinellida: Lyssacinosida, Rossellidae): a species and a species flock in the Southern Ocean

Vargas¹,

Dohrmann²,

Goecke

et al. 2016

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Hexactinellida (glass sponges) are abundant and important components of Antarctic benthic communities. However, the relationships and systematics within the common genus Rossella Carter, 1872 (Lyssacinosida: Rossellidae) are unclear and in need of revision. The species content of this genus has changed dramatically over the years depending on the criteria used by the taxonomic authority consulted. Rossella was formerly regarded as a putatively monophyletic group distributed in the Southern Ocean and the North Atlantic. However, molecular phylogenetic analyses have shown that Rossella is restricted to the Southern Ocean, where it shows a circum-Antarctic and subantarctic distribution. Herein, we provide a molecular phylogenetic analysis of the genus Rossella, based on mitochondrial (16S rDNA and COI) and nuclear (28S rDNA) markers. We corroborate the monophyly of Rossella and provide evidence supporting the existence of one species, namely Rossella antarctica Carter, 1872 and a species flock including specimens determined as

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The infauna of three widely distributed sponge species (Hexactinellida and Demospongiae) from the deep Ekström Shelf in the Weddell Sea, Antarctica

Cited by 27 publications

References 45 publications

Rossella podagrosa Kirkpatrick, 1907—A valid species after all

Rossella podagrosa Kirkpatrick, 1907—A valid species after all

Fatty acid composition and antioxidant activity of Antarctic marine sponges of the genus Latrunculia

Nuclear and mitochondrial phylogeny ofRossella(Hexactinellida: Lyssacinosida, Rossellidae): a species and a species flock in the Southern Ocean

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