12 new marine species found in the Dutch Wadden Sea
In 2009, the Dutch Invasive Alien Species Team requested a survey (rapid assessment) of (alien) marine algae and macrofauna of hard substrata in the Dutch Wadden Sea. During this survey 83 localities were searched for native and non-native species. In total 129 species were observed, 29 of which were cryptogenic or of non-native origin. Twelve of these species and one subspecies were found to be new to the Dutch Wadden Sea. One red alga (Ceramiaceae sp.) is probably a new species to Europe. The sea-squirt Molgula socialis is recorded as new for the Netherlands. It is probably widespread, may even be native and misidentified in the past as the non-native American species M. manhattensis.The total number of non-native species in the Dutch Wadden Sea has been raised to 64. The observed (sub)species of an alien or unknown origin in the survey are:
All results from this survey can be downloaded here.
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