Description: The Antarctic limpet Nacella concinna is the most conspicuous macro-benthic species in the intertidal and splash zone of the maritime Antarctic. Larval recruitment in this non-homing limpet takes place in the subtidal, and part of the population then migrates to the intertidal in the beginning of spring. The migratory limpets belong to an ecomorph with a higher and heavier shell (left picture, limpets at the intertidal zone), whereas shells of permanently subtidal limpets are lighter and flatter (right picture, taken at the subtidal). The two ecomorphs can be found in every location along the peninsulas of the South Shetlands. We are interested in the functional biodiversity of the two Nacella ecomorphs at Jubany station/Dallmann laboratory on King George Island, and investigate the behavioural and ecophysiological differences in-situ, and following exposure to air/emersion and to hypoxia. A special interest is on the expression and function of hypoxia inducible factor 1 (HIF-1) in the limpet model. This transcription factor is a universal master regulator of hypoxic metabolism and centrally involved in the metabolic regulation of cells and tissues under oxygen shortage. In the frames of the project we have obtained a first molluscan HIF-1-alpha sequence which, if compared to C. elegans and crustacean genes indicates rather high sequence variability to exist between invertebrates, in contrast to low variability among vertebrate genes.
SupportProgram
Origins: /Bund/UBA/UFORDAT
Tags: Krustazeen ? Muschel ? Benthal ? Sauerstoff ? Gezeitenzone ? Wirbeltier ? Island ? Arktisches Meereis ? Wirbellose ? Regulierung ? Stress ? Bahnhof ? Insel ? Halbinsel ? Luft ? Antarktis ? Umweltschutzprotokoll zum Antarktis-Vertrag ? Antarktisforschung ? Artenvielfalt ? Exposition ? Organisches Gewebe ? Studie ? Zelle ? Biodiversität ? in situ ? Stoffwechsel ? Bevölkerung ? Rechte ? Forschungseinrichtung ? Betriebsvorschrift ? Quelle [Gewässer] ? Sauerstoffmangel ? Sequenzierung ? Standort ? Teil ? Transkription ? Verantwortung ? Verteidigung ? Zins ? besonder ? bestehend ? permanent ? südlich ? unter ? vergleichen ? Art [Spezies] ? Funktion ? Plastizität ? Projekt ?
Region: Kreisfreie Stadt Bremen
Bounding boxes: 8.7975° .. 8.7975° x 53.11528° .. 53.11528°
License: cc-by-nc-nd/4.0
Language: Englisch/English
Time ranges: 2005-10-31 - 2008-12-31
Webseite zum Förderprojekt
http://www.spp-antarktisforschung.de/ (Webseite)Accessed 1 times.