New Research on Biological Invaders Published

New research into the proportion of time semi-enclosed water bodies are connected to the ocean has found that the greater the connectivity, the greater the presence of the non-native crab species carcinus maenas.

This finding lends itself to the management of approximately 90 coastal lakes and lagoons found along the New South Wales coast, and the ongoing debate on whether to artificially open them or not.

These waterways naturally spend days to years separated from the ocean by sand bars. Artificially opening sand bars, either by dredging or by building a training wall, can alleviate flooding and improve water quality by re-establishing tidal conditions. However, a new study published in Limnology and Oceanography suggests that artificially opening lakes and lagoons may render these waterways more susceptible to biological invaders.

Our surveys of 14 southern New South Wales coastal lakes and lagoons revealed that the invasive European shore crab was absent from waterways that were disconnected from the ocean by a sand bar for more than 60% of the time,” said lead author Clifford Garside from Macquarie University.By contrast, the crab was recorded in all of the surveyed lakes and lagoons that had entrances either permanently trained open or naturally open for more than 40% of the time“.

Press Release, June 16, 2014

 

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3rd International Congress Hydraulic Engineering Structures and Dredging

Russia’s leading maritime industry Media Group PortNews (www.portnews.ru) holds a traditional annual Congress “Hydraulic Engineering Structures and Dredging” in Moscow. 

The two-day Congress includes the 7th International Forum of Dredging Companies and the 3rd Technical Conference “Modern Solutions for Hydraulic Engineering”.

Infrastructure development is among the real sources of Russia’s economy growth. Construction of port facilities and new hydraulic engineering structures on the country’s inland waterways constitute an essential part of all infrastructure projects. It is important to take into account the best international practices to implement these projects effectively.

The program of the Congress will be devoted to the latest technologies for dredging and hydraulic engineering works. Speakers and delegates will refer to real projects to discuss specifics features of dredging works, as well as dedicated fleet and equipment involved.

To learn more about event, please, contact the organizing committee: snitko@portnews.ru

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