Initial risk assessment of alien species in nordic coastal waters.

Gollasch, Stephan and Leppäkoski, Errki, eds. (1999) Initial risk assessment of alien species in nordic coastal waters. Open Access . Nord, 1999 (8). Nordic Council of Ministers, Copenhagen, Denmark, 244 pp. ISBN 92-893-0293-3

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Abstract

Alien (nonindigenous, exotic) species are currently present in the coastal waters of all of the Nordic countries. The movement of ballast water by ships is the largest single source of aliens’ transfer throughout the world today.
Once a species has become established, control activities are likely to be difficult and costly. Therefore, the goal must be to prevent introductions of non-native species into the Nordic area and their secondary dispersal within the area. Marine biologists have to detect new introductions in a timely manner, assess whether they should be regarded as potentially harmful, and monitor the distribution and ecological impacts of invasive species of foreign origin.
Through literature review a semi-quantitative model (low - medium – high risk) has been developed and applied to five representative ports in Nordic waters, including the Baltic Sea, the�Kattegatt, the Skagerrak and the North Sea. Desk studies elucidate the main transport routes for ballast water imported to and from these ports in the Bergen area (Norway), Stenungsund area (Sweden), Klaipeda (Lithuania), Turku/Åbo (Finland), and St. Petersburg (Russia). Individual physical, chemical and biological profiles of the harbours are provided. Further inventories of volumes and patterns of ballast water are needed for assessing the scope and significance from a regional perspective, and to identify risk areas (donor as well as recipient area) for introductions.
Information is presented on the current key species and the most important target species likely to invade Nordic coastal waters in the future. Examples from Nordic and other temperate environments are given on ecosystems at risk and potential and actual effects of nonindigenous species.
Documentation of economic impacts of introduced species is still unsufficient for analyses of costs of effects on maritime industries, underwater constructions or costs caused by fouling of alien species in industrial (e.g. cooling water of power stations) and shipping. Any commercial benefits of nonnative species should also be included in the analyses.
An international outlook is based on information available from e.g., North Sea, Black Sea, the USA (Great Lakes, Chesapeake Bay, San Francisco Bay) Australia and New Zealand.

Document Type: Book
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BI Biological Oceanography
Refereed: Yes
ISSN: 0903-7004
Date Deposited: 18 Feb 2008 17:24
Last Modified: 30 Apr 2019 11:53
URI: http://oceanrep.geomar.de/id/eprint/2167

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