Geodia barretti | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Porifera |
Class: | Demospongiae |
Order: | Tetractinellida |
Family: | Geodiidae |
Genus: | Geodia |
Species: | G. barretti |
Binomial name | |
Geodia barretti Bowerbank, 1858 | |
Synonyms | |
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Geodia barretti is a massive deep-sea sponge species found in the boreal waters of the North Atlantic Ocean, [1] and is fairly common on the coasts of Norway and Sweden. It is a dominant species in boreal sponge grounds. [2] [3] Supported by morphology and molecular data, this species is classified in the family Geodiidae. [4]
Source: [1]
Massive sponge, often irregularly lobate, whitish to light yellow color. The inside is light brown. Surface is smooth. Oscules are grouped in more or less shallow depressions (= preoscules) while pores are spread over the whole body. There is a distinct cortex about 0.5 mm thick, it is made of ball-shaped spicules called sterrasters.
One meta-transcriptome was obtained by pyrosequencing from a specimen collected south of Bergen (Norway) in 2007. [6] Double-stranded cDNA was sequenced on a GF FLX sequencer (Roche Applied Sciences/454 Life Sciences, Barnford, CT). rRNA ribo-tags revealed a microsymbiont community, dominated by group SAR202 of Chloroflexota , candidate phylum " Poribacteria ", and Acidobacteriota . The most abundant mRNAs coded for key metabolic enzymes of nitrification from ammonia-oxidizing Archaea as well as candidate genes involved in related processes.
The whole genome of this sponge was first published in 2023; [7] it was sequenced on PacBio and Illumina (HiSeqX) platforms from a specimen collected in 2016 in Kosterhavet National Park, on the Swedish west coast. This nuclear genome assembly is 144 Mbp long (4,535 scaffolds) with a BUSCO completeness of 71.5%, while the mitochondrial genome is 17,996 bp long. [7] Annotation of the nuclear genome found 31,884 protein-coding genes.
This sponge was named in honor of one of its discoverers, the biologist Lucas Barrett (1837-1862).
This sponge is called "rutabaga sponge" in Norwegian (kålrabisvamp) and "football sponge" in Swedish (fotbollssvampdjur).
This sponge was collected by biologists Robert McAndrew and Lucas Barrett in 1855 on the South side of Vikna Island (formerly called Vigten or Vikten Island), North-Trøndelag, Norway, at a depth of 183 meters. It was later described by the British sponge taxonomist James Scott Bowerbank in 1858.
The holotype is a dry specimen stored at the Natural History Museum in London with the museum number BNHM 1877.5.21.1399. There are also slides of the holotype: BNHM 1877.5.21.1400 (one slide of surface and one spicule preparation) and BNHM 1877.5.21.1401 (slide of a section).
According to morphology and molecular data, this species belongs to the family Geodiidae and to the genus Geodia . [4] It also seems to belong to a clade of Geodia species that all have their oscules in depressions (including Geodia megastrella , Geodia hentscheli ). [8] This Geodia clade was given a PhyloCode name: Depressiogeodia. [4]
G. barretti is present throughout the boreal waters of the North Atlantic, [1] where water temperature is usually 3-9 degrees Celsius. This species is present on the Swedish west coast [9] and all along the Norwegian coast and Svalbard. [10]
One single specimen was formally recorded from the Mediterranean Sea, in the 'Canyon des Moines' (south Corsica), at 167 m (water temperature was 13 °C). [1] Deeper specimens (1100-1700 meter depths) were also recorded off the Atlantic coast of Morocco (Ibero-Moroccan Gulf). [1] Several deep specimens were collected on the mid-Atlantic ridge at 1650 m depth. [11]
It is found from 30 to 2000 meter depths. [1] Most North-East Atlantic records are from the continental margins, between 200 and 500 m. In the North-West Atlantic (Grand Banks, Flemish Cap, Nova Scotia, and Davis Strait), it has been recorded between 410 and 1852 meter depths. Shallow specimens are common along the Norwegian coast, [12] especially in fjords.
G. barretti is an oviparous species with separated males and females. [13] [14] The reproductive cycle is annual with one or two events of gamete release per year, the major reproductive season being from late spring to early autumn. [15] The larvae has never been observed. Asexual reproduction has never been formally described.
The reproduction molecular toolkit of boreo-arctic Geodia species has been investigated, including in Geodia barretti, using proteomic and trancriptomic data. Genes involved in the formation of the gametes appeared close to the ones found in the rest of the animals. [16]
The sponge-feeding deep-sea chiton Hanleya nagelfar is often found on G. barretti in the North-East Atlantic. [17] The parasitic foraminiferan Hyrrokkin sarcophaga [18] is more rarely found living on G. barretti.
G. barretti has less associated macrofauna than any of the other boreo-arctic Geodia species: only ten different species of epibionts were recorded vs. 62 for Geodia macandrewii . [19]
G. barretti is a high microbial abundance (HMA) sponge, [20] such that the mesohyl is essentially packed with microbes, and just a few sponge cells. It was calculated that the sponge itself (canals, choanocyte chambers and cells) represents only 5% of its total volume, the rest being microbes. [21]
Estimates of the number of bacteria in G. barretti are between 2.9x1011 [20] and 3.1x1011 [21] microbes/cm3 sponge.
Streptomyces sp. GBA 94-10, an Actinomycetota, was isolated from a Norwegian G. barretti. [22] It was shown to be a close relative of the terrestrial Streptomyces albus J1074. The genome was fully sequenced (Genbank accession numbers CM002271- plasmid pGBA1 CM002272).
Streptomyces poriferorum (type strain P01-B04T), an Actinomycetota, was isolated and described in two Norwegian sponges ( Antho dichotoma and G. barretti). [23] This bacteria might provide their host with chemical defenses and might be involved in nitrogen metabolism. The whole genome was sequenced (Genbank accession number JAELVH010000000); the 16S rRNA gene sequence can also be found on Genbank (MW583039).
Actinoalloteichus fjordicus, an Actinomycetota, was isolated and described in two Norwegian sponges ( Antho dichotoma and G. barretti). [24] This Actinomycetota genus has been found in terrestrial and marine habitats. This bacterium's genome was fully sequenced (Genbank accession numbers CP016077-plasmid CP016078).
The major compound of G. barretti, called barettin, was isolated in 1986 at Uppsala University, Sweden; barettin has antifouling activity. Since then, two more barettins were discovered, as well as other small molecules (see Table below). Peptides called barrettides were found and published in 2015. [25] Using metabolomics on specimens of G. barretti from Sweden, most of these compounds could be found, in addition to nucleotides, nucleosides and nucleobases, as well as some fatty acids. [26]
Compound | Type of compound | Discovered/described by | Biactivities | Structure |
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barettin | diketopiperazine (monobrominated) | Lidgren, Bohlin and Bergman (1986) [27] | ||
8,9-dihydrobarettin | diketopiperazine (monobrominated) | Sjögren, Göransson, Johnson, Dahlström, Andersson, Bergman, Jonsson and Bohlin (2004) [28] | ||
bromobenzisoxalone barettin | diketopiperazine (dibrominated) | Hedner, Sjögren, Fröndberg, Johansson, Göransson, Dahlström, Jonsson, Nyberg and Bohlin (2006) [29] | antifouling [29] | |
geobarettin A | diketopiperazine (monobrominated) | Di, Rouger, Hardardottir, Freysdottir, Molinski, Tasdemir and Omarsdottir (2018) [33] | NO anti-inflammatory activity [33] | |
geobarettin B | diketopiperazine (monobrominated) | Di, Rouger, Hardardottir, Freysdottir, Molinski, Tasdemir and Omarsdottir (2018) [33] | anti-inflammatory activity [33] | |
geobarettin C | indole (monobrominated) | Di, Rouger, Hardardottir, Freysdottir, Molinski, Tasdemir and Omarsdottir (2018) [33] | anti-inflammatory activity [33] | |
L-6-bromohypaphorine | indole (monobrominated) | Di, Rouger, Hardardottir, Freysdottir, Molinski, Tasdemir and Omarsdottir (2018) [33] | Agonist of Human α7 Nicotinic Acetylcholine Receptor [34] | |
6-bromoconicamin | indole (monobrominated) | Olsen, Hansen, Moodie, Isaksson, Sepcic, Cergolj, Svenson and Andersen (2016) [32] | inhibitor of electric eel acetylcholinesterase [32] | |
8-hydroxy-6-bromoconicamin | indole (monobrominated) | Olsen, Hansen, Moodie, Isaksson, Sepcic, Cergolj, Svenson and Andersen (2016) [32] | NO inhibition of electric eel acetylcholinesterase [32] | |
3-methylcytidine, 3-methyl-2’-deoxycytidine, 3-methyl-2’-deoxyuridine | nucleoside | Lidgren, Bohlin, and Christophersen (1988) [35] | contractile activity (3-mCyd, 3-mdCyd) [35] | |
histamine | histidine derivative | Lidgren, Bohlin, and Christophersen (1988) [35] | contractile activity [35] | |
barrettides A-B | peptides | Carstens, Rosengren, Gunasekera, Schempp, Bohlin, Dahlström, Clark and Göransson (2015) [36] | antifouling [36] NOT antibacterial [36] | |
2-O-acetyl-1-O-hexadecylglycero-3-phosphocholine | phosphocholine | Olsen, Søderholm, Isaksson, Andersen and Hansen (2016) [37] | antitumoral [37] | |
glycine betain β-alanine betain ɣ-aminobutyric acid betain tetramethylammonium ion | quaternary ammonium compounds | Hougaard, Anthoni, Christophersen, Larsen and Nielsen (1991) [38]
| ||
sterols | Hougaard, Christophersen, Nielsen, Klitgaard, and Tendal (1991) [40] | |||
fatty acids | Thiel, Blumenberg, Hefter, Pape, Pomponi, Reed, Reitner, Wörheide and Michaelis (2002) [41]
| |||
free amino acids | Hougaard, Christophersen, Nielsen, Klitgaard, and Tendal (1991) [40] |
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Sponges, the members of the phylum Porifera, are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells.
Demosponges (Demospongiae) are the most diverse class in the phylum Porifera. They include greater than 90% of all species of sponges with nearly 8,800 species worldwide. They are sponges with a soft body that covers a hard, often massive skeleton made of calcium carbonate, either aragonite or calcite. They are predominantly leuconoid in structure. Their "skeletons" are made of spicules consisting of fibers of the protein spongin, the mineral silica, or both. Where spicules of silica are present, they have a different shape from those in the otherwise similar glass sponges. Some species, in particular from the Antarctic, obtain the silica for spicule building from the ingestion of siliceous diatoms.
Homosclerophorida is an order of marine sponges. It is the only order in the monotypic class Homoscleromorpha. The order is composed of two families: Plakinidae and Oscarellidae.
Spicules are structural elements found in most sponges. The meshing of many spicules serves as the sponge's skeleton and thus it provides structural support and potentially defense against predators.
Geodiidae is a family of sea sponges.
Callyspongia truncata is a species of marine sea sponge. Like all marine sponges, C. truncata is a member of phylum Porifera and is defined by its filter-feeding lifestyle and flagellated choanocytes, or collar cells, that allow for water movement and feeding. It is a species of demosponge and a member of Demospongiae, the largest class of sponges as well as the family Callyspongiidae. C. truncata is most well known for being the organism from which the polyketide Callystatin A was identified. Callystatin A is a polyketide natural product from the leptomycin family of antibiotics. It was first isolated in 1997 from this organism, which was collected from the Goto Islands in the Nagasaki Prefecture of Japan by the Kobayashi group. Recent studies have revealed numerous other bioactive compounds that have been found in this species.
Sponge grounds, also known as sponge aggregations, are intertidal to deep-sea habitats formed by large accumulations of sponges, often dominated by a few massive species. Sponge grounds were already reported more than 150 years ago, but the habitat was first fully recognized, studied and described in detail around the Faroe Islands during the inter-Nordic BIOFAR 1 programme 1987–90. These were called Ostur by the local fishermen and this name has to some extent entered the scientific literature. Sponge grounds were later found elsewhere in the Northeast Atlantic and in the Northwest Atlantic, as well as near Antarctica. They are now known from many other places worldwide and recognized as key marine habitats.
Stupenda is a genus of sea sponges. It is the only genus in the monotypic family Stupendidae and is represented by a single species, Stupenda singularis.
Barettin is a brominated alkaloid made of a dehydrogenated brominated derivative of tryptophan linked by two peptide bonds to an arginine residue, forming a 2,5-diketopiperazine nucleus. It is a cyclic dipeptide.
Geodia megastrella is a species of sponge in the family Geodiidae. It is a type of demosponge found in the deep temperate waters of the North Atlantic Ocean. It has characteristic stellar-shaped large spicules coined 'megastrellum', hence its name. The species was first described by Henry John Carter in 1876, after dredging it up aboard H.M.S. 'Porcupine', near the Cape St. Vincent in Portugal.
Geodia atlantica is a species of sponge in the family Geodiidae. It is found in the waters of the North Atlantic Ocean.
Geodia hentscheli is a species of sponge in the family Geodiidae. It is found in the waters of the North Atlantic Ocean. The species was described in 2010 by Paco Cárdenas, Hans Tore Rapp, Christoffer Schander & Ole S. Tendal.
Jean Vacelet is a French marine biologist who specialises in the underwater fauna of the Mediterranean. After earning his licence at the Faculté des Sciences de Marseille and learning to dive in 1954, he specialised in the study of sponges at the Marine station of Endoume, and there he has stayed faithful to both sponges and place for more than half a century. His research has included all aspects of sponges: taxonomy, habitat, biology, anatomy, their bacterial associations, and their place in the evolution of multi-celled animals. He has studied them not only in the Mediterranean but in the Indian Ocean and the Pacific. Exploration of underwater grottoes, together with Jacques Laborel and Jo Hamelin, revealed the existence of sponges dating from very ancient geological periods and the unexpected existence of carnivorous sponges, and surprisingly, the grottoes in some ways mimicked life at much greater depths.
Dysidea etheria, commonly known as the ethereal sponge or heavenly sponge, is a species of lobate sponge within the class Demospongiae. This marine sponge is known for its light blue color and can be found in the Caribbean as well as off the coasts of Florida and Georgia. Like all other poriferans, D. etheria is capable of both sexual and asexual reproduction. The use of spicule collection as well as chemical defenses allows D. etheria to protect itself against predators such as the zebra doris and the orange knobby star. D. etheria is also known as a host species of the invasive brittle star Ophiothela mirabilis. Lastly, various molecular biology studies have utilized D. etheria to both study foreign particle transport in sponges and to isolate novel molecules.
Latrunculia biformis, the mud-clump sponge, is a widespread deep sea demosponge from the southern hemisphere.
Plakortis is a genus of marine sponges in the order Homosclerophorida, first described by Franz Eilhard Schulze in 1880.
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Michelle Kelly, also known as Michelle Kelly-Borges, is a New Zealand scientist who specialises in sponges, their chemistry, their evolution, taxonomy, systematics, and ecology.
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Robertus Wilhelmus Maria (Rob) van Soest, born in 1946, is a Dutch marine biologist. He works at the Naturalis Biodiversity Center and is also affiliated with the University of Amsterdam. He co-authored with John N. A. Hooper Systema Porifera: A Guide to the Classification of Sponges, a standard reference for sponge classification.