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Published December 16, 2011 | Version v1
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Najas flexilis (Najadaceae or Hydrocharitaceae), a Natura 2000 species – new for Austria

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Description

Najas flexilis was found in Lake Millstätter See – the first record for Carinthia and for Austria, which is also highly relevant for the Europe-wide species protection plan. Najas flexilis (Najadaceae or Hydrocharitaceae) is a submersed macrophyte of elodeid growth form. It is native to America and Europe and has a submeridional to nordic-temperate distribution. While the species is still frequently found in North America, it is in danger of extinction in Europe. For this reason Najas flexilis is listed in Appendix 1 of the Bern Convention and in the Annexes II and IV of the EU Habitats Directive. In 2002, Najas flexilis was discovered during an extended macrophyte-mapping campaign according to the Water Framework Directive. The differential characters to other Najas-species are explained and illustrated using photos of herbarium specimens. The ecological demands of Najas flexilis are discussed in relation to limnological features of Lake Millstätter See and the particular characteristics of the finding sites.

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1681-5947 (ISSN)