Verspreiding van de libellen van de Habitatrichdijn in Nederland
Brachytron , Volume 9 - Issue 1/2 p. 3- 13
Bouwman, J.H. & V.J. Kalkman, 2006. Status of the Odonata of the Habitat Directive in The Netherlands. Brachytron 9(1&2): 3-13. In 2004 special attention was given to the distribution of five species of Odonata – Sympecma paedisca, Aeshna viridis, Ophiogomphus cecilia, Leucorrhinia pectoralis and Gomphus flavipes – present on the Habitat Directive of the EU. Of the first four species all square kilometres where the species was found between 1980-2000 but not after 2000 were revisited. For Gomphus flavipes a search was conducted in each 5 km squares in the flood plains. The work resulted in up to date information on the distribution of the species. Sympecma paedisca -The reproduction takes place in the Weerribben and Kuinderplas. In the provinces of Friesland and Drenthe individuals are seen at many different sites each autumn but until now no successful reproduction is proven. Aeshna viridis -The distribution of this dragonfly overlaps with that of Water soldier (Stratiotes aloides). In The Netherlands there are two coreareas where large stands of this plant occur and where A. viridis is found: in the western en northern part of the country. A. viridis disappeared from a few localities, but it was discovered at several new localities. The overall impression is that the species is stable. Gomphus flavipes – After an absence of more than 90 years the species was rediscovered in 1996. Since then the species colonised all larger rivers in the Netherlands. It is especially common along the Waal and Merwede and less so along the Lek and Nederrijn. Prior to 2004 the species was known from a few records along the IJssel. During fieldwork in 2004 it was shown that it is present along the full length of the IJssel though in low numbers. The species is largely absent from the river the Maas. This river lacks the groynes and the adjacent sandbanks which are deposited behind the groynes and which probably form the larval habitat in other rivers. Remarkable a small population is present along the Roer, a small river, which runs into the Maas. Ophiogomphus cecilia – The only reproduction site in The Netherlands is the river Roer. In 2002 and 2003 in total 105 exuviae were found making clear that this population is well established. Searches along the Geleenbeek, where the species was seen in 1995 and 1996 were not succesfull. Leucorrhinia pectoralis – This species is rare in most of Europe but relatively common in parts of The Netherlands. Large populations occur in the lowland peat marshes of De Weerribben and De Wieden and the Lonnekermeer (all in the province of Overijssel). A small population is found in de lowland peat marshes in the province of Utrecht and Noord-Holland (nature reserve Het Hol). Apart from these populations the species is found at several localities in the east and south of the Netherlands and at one locality in the dunes. However, none of these localities seem to hold stable populations.
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