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| | In contrast to higher levels of diversity, known species diversity in the sea is much lower than on land - some 250 000 species of marine organisms are currently known, compared with more than 1.5 million terrestrial ones. Much of this difference is because of the large number of described terrestrial arthropods, for which there is no marine equivalent. Amongst fishes, almost as many freshwater species as marine are known, despite the fact that freshwater habitats account for only around one ten- thousandth of the volume of marine ones. Similarly, the most diverse known marine habitats - coral reefs - are far less diverse in terms of species number than the moist tropical forests that are often taken as their terrestrial counterparts. | | | | The apparent lower total species diversity of the marine biosphere is because marine environments, particularly deep-water ones, tend to show much less variation in time and space in their physical characteristics than terrestrial ones. This lack of physical variation seems to result in a similar lack of ecological variation over wide areas. | | | | The largest marine phyla - Mollusca and Crustacea - each comprise far fewer than 100,000 known marine species, in contrast with the Mandibulata (insects and relatives), of which around 1 million terrestrial species have been identified to date. The only eukaryote phyla with 10,000 or more described species that are believed to have comparable levels of diversity both on land and in the sea are the Platyhelminthes (flatworms), Nematoda, Mollusca and Craniata. As on land, vertebrates are by far the best-known group of marine organisms. Of the 50,000 or so described extant species, around 15,000 may be considered marine, the overwhelming majority of which are fishes and a few are tetrapods. | | | | |
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| | Baltic Sea Region Perspectives - innovation, mobility, integration | | Date: | 09 November 2006 - 09 November 2006 | | Location: | Brussels, Belgium | | Organizer: | Copenhagen EU Office | | Information: | One of the most dynamic growth centres of the new Europe is situated on its very top and encompasses 11 countries. The Baltic Sea region builds its strengths on diversity, growth and human skills and has a strong history and culture. The Baltic Sea Region exceeds European standards on many indicators, and strives to ensure a strong position in the Europe of tomorrow. The Region seeks to be the role model for Europe in achieving sustainable growth based on innovation, mobility and integration. President Barroso and other European leaders have in recent years praised its visionary initiatives and its solid implementation of the Lisbon agenda. This conference will discuss how the Baltic Sea Region is actively contributing to the common European Agenda and will specify initiatives to be implemented by the EU. The conference will provide insight and analysis with a view to communicate the strengths and identify the challenges of the Baltic Sea Region. | |
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