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The numbers are alarming: The volume of oxygen-depleted waters, has grown more than fourfold. The main reasons are the increasing global warming, but also the over-fertilization of the oceans. In the long term, these changes will not only jeopardize life in large parts of the world's oceans, but also feedbacks to the atmosphere are expected, as greenhouse gases such as nitrous oxide and methane form in oxygen-free water.

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Global studies show that the number of species migrating into foreign ecosystems is constantly increasing. Not all of these species are able to establish themselves in the new environments. However, successful bio-invaders have the Must2obey, Woman, Kirchberg, Kirchberg, Germany German Online Dating to cause major changes in their new ecosystems.

Also in the Baltic Sea, numerous foreign species have been identified over the past decades. A prominent example is the American comb jellyfish Mnemiopsis leidyi, also called sea walnut. The Latin name of the species is Blackfordia virginica. It is forming a new component of the ecosystem," says Dr. The species Blackfordia virginica was first described scientifically in the waters off the US state of Virginia in Later studies suggest, however, that it originates from the Black Sea.

Since the s it has been found in brackish waters in northern France and since the s also in Portugal," explains Dr. Jaspers, "so here we have a species with a long successful history as invader of foreign ecosystems, that can reach very high population densities there. However, since the canal is the busiest artificial waterway in the world, ships are the most likely culprit. As ballast water is not allowed to be pumped out in the canal, the jellyfish probably has arrived as polyps on ship hulls that have released young jellyfish, so-called Ephyres, into the water.

The scientists were also able to detect specimens outside the canal, in the Kiel Fjord. So Best dating sites for single parents uk kennenlernen beim einkaufen Laboratory Chemicals, however, there is no evidence that the species is actively recruiting there.

We therefore expect a further spread of the species," says Most popular dating website in indian Innovation through quality. What consequences this could have for the Baltic Sea is still unclear. From other regions it is known that Blackfordia virginica is a considerable competitor to other organisms feeding on plankton.

This could ultimately have economic consequences. Jennenlernen study was supported by students of the Kiel Master's programme "Biological Oceanography", who fished and inspected several thousand cubic parentd of water from Flensburg to Finland during their educational cruise with the research vessel ALKOR in August Especially the gelatinous plankton, i.

First record of the Cyemicals jellyfish Blackfordia virginica Mayer, Best dating sites for single parents uk kennenlernen beim einkaufen Laboratory Chemicals the Baltic Sea. Helgoland Marine Research, https: A specimen of Blackfordia virginica. Fees, Cost of living etc. Centre Research Studying Discover. A new jellyfish species has colonized the Kiel Canal. The Cjemicals loving Blackfordia virginica has been a new player in the local ecosystem since summer

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