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Discovery of a black smoker vent field and vent fauna at the Arctic Mid-Ocean Ridge
The first discovery of a black smoker vent field at the AMOR is reported, which documents that extensive venting and long-lived hydrothermal systems exist at ultraslow-spreading ridges, despite their strongly reduced volcanic activity.
Complex nitrogen cycling in the sponge Geodia barretti.
This is the firstProof of anammox and denitrification in the same animal host, and the first proof of anaerobic ammonium oxidation and den itrification in sponges.
An Anaerobic World in Sponges
Results show the presence of an anoxic micro-ecosystem in the sponge G. barretti, and imply mutualistic interactions between sponge cells and anaerobic microbes, which may help answer unsolved questions in sponge ecology and biotechnology.
Developmental gene expression provides clues to relationships between sponge and eumetazoan body plans.
Analysis of expression of a broad range of eumetazoan developmental regulatory genes in Sycon ciliatum provides a framework for further studies aimed at deciphering ancestral developmental regulatory networks and their modifications during animal body plans evolution.
Oxygen and carbon isotope ratios related to growth line patterns in skeletons of Lophelia pertusa (L) (Anthozoa, Scleractinia): Implications for determination of linear extension rate
The results indicated that isotopic fractionation in Lophelia is controlled by kinetic isotope effects, and the shape of the δ180 curve along the growth axis in the septa was almost parallel with the curve of sea water temperatures.
Organic matter release by cold water corals and its implication for fauna–microbe interaction
Cold water corals can stimulate microbial activity in the direct reef vicinity by the release of easily degradable and nutrient-rich organic matter, which may thereby function as a vector for carbon and nutrient cycling via the microbial loop in cold water coral reef systems.
Taxonomy, biogeography and DNA barcodes of Geodia species (Porifera, Demospongiae, Tetractinellida) in the Atlantic boreo-arctic region
Geodia species north of 60 degrees N in the Atlantic appeared in the literature for the first time when Bowerbank described Geodia barretti and G.macandrewii in 1858 from western Norway. Since then…
Ammonia-oxidizing archaea as main drivers of nitrification in cold-water sponges.
- Regina Radax, F. Hoffmann, H. Rapp, S. Leininger, C. Schleper
- Environmental ScienceEnvironmental microbiology
- 1 April 2012
The results identify AOA as the major drivers of nitrification in four cold-water sponges, and indicate that these archaea may be considered as a relevant factor in nitrogen cycling in ocean regions with high sponge biomass.
Metatranscriptomics of the marine sponge Geodia barretti: tackling phylogeny and function of its microbial community.
The analysis demonstrates the potential and limits of using a combined rRNA and mRNA approach to explore the microbial community profile, phylogenetic assignments and metabolic activities of a complex, but little explored microbial community.
Molecular taxonomy and phylogeny of the Geodiidae (Porifera, Demospongiae, Astrophorida) – combining phylogenetic and Linnaean classification
A molecular taxonomy and phylogeny of the Geodiidae (Porifera, Demospongiae, Astrophorida) – combining phylogenetic and Linnaean classification is presented.