Description: Das Projekt "Long-term changes in baltic algal species and ecosystems" wird vom Umweltbundesamt gefördert und von Universität Kiel, Institut für Meereskunde, Abteilung Meeresbotanik durchgeführt. General Information: The most interesting biogeographical aspects of the Baltic are its salinity gradient, which extends from the Atlantic with oceanic salinity down to near fresh water in the inner parts of the Baltic estuary, and its young age, being only about 7.000 years old as a brackish water basin. These characteristics have led to strong selection pressure among the organisms in the Baltic Sea, and therefore the area is especially tractable for testing evolutionary diversification and adaptation. Ecophysiological comparisons between the Atlantic and Baltic sea algae show that morphological and physiological (measured as photosynthetic performance, growth rate and salinity tolerance) variation is widespread among the species. Also genetic differentiation has been found along the salinity gradient with no apparent hybridization along the contact zones. Our aim is to find out, how common the morphological, physiological and genetic adaptation is in the Baltic Sea algae, whether these are linked together, and what is the history behind the adaptive strategies. This will be done by the study of three integrated levels of the benthic algal populations along the salinity gradient. The central objectives will be to establish a comprehensive reference culture collection from the Baltic Sea across the Skagerrak/Kattegat salinity gradient (task 1), to assess the growth, survival and dispersal performance of salinity ecotypes and phylogeny of bio geographic populations (task 2), and finally to explore the genetic diversity in Baltic Sea populations (task 3). Task 1 The baseline culture collections will be established and maintained in the Scandinavian Culture Collection for Algae and Protozoans, University of Copenhagen, and they will include all important species of red, brown and green algae. Task 2. The salinity ecotypes occurring over a range of salinity will be assessed using classical gradient tables. Task 2 and 3. DNA sequencing will be used for assessing cryptic level species and subspecies diversity. Phylogenetic history and distributional patterns will be studies in selected species of Enteromorpha, Ceramium and Fucus, which provides the link between the palaeoclimatic events and the dominant role they have in their present habitats. Information from task 2 and 3 will be used for correlation analyses between ecotypes and population differentiation. The project will be coordinated from University of Copenhagen (Denmark), and partners are University of Groningen (the Netherlands), University of Kiel (Germany), University of Oslo (Norway) and University of Helsinki (Finland). Prime Contractor: Kobenhavns Universitet, Department of Phycology, Botanical Institute; Kobenhavn; Denmark.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Ästuar ? Kiel ? Populationsdynamik ? Oslo ? Kopenhagen ? Meeresbotanik ? Ökophysiologie ? Paläoklimatologie ? Pflanzenphysiologie ? Salztoleranz ? Genetische Variation ? Norwegen ? Helsinki ? Algologie ? Bevölkerungswachstum ? DNA ? Gewässerbelastung ? Grünalgen ? Langzeitwirkung ? Meerwasser ? Bundesrepublik Deutschland ? Dänemark ? Finnland ? Niederlande ? Süßwasser ? Meereskunde ? Meeresorganismen ? Marines Ökosystem ? Brackwasser ? Protozoen ? Salzwasser ? Diversifikation ? Salzgehalt ? Habitat ? Korrelationsanalyse ? Benthos ? Anpassungsstrategie ? Biotest ? Studie ? Vergleichsanalyse ? Dispersion ? Algen ? Meeresgewässer ? Biologische Anpassung ? Verteilungskoeffizient ? Phylogenese ? Biologische Untersuchung ? Erdgeschichte ? Genetische Vielfalt ? Evolution ? Feldstudie ? Artenvielfalt ? Klimawirkung ? Atlantischer Ozean ? Population ? Hybridisierung ? Datenerhebung ? Ostsee ? Biomasse ? Ökosystem ? Forschungskoordination ? Überlebensfähigkeit ? Sequenzierung ? Populationsanalyse ? Wachstum [biologisch] ? Ursache-Wirkung-Beziehung ?
Region: Schleswig-Holstein
Bounding box: 9.75° .. 9.75° x 54.2° .. 54.2°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1998-04-01 - 2001-03-31
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