A preliminary study of biodiversity hotspots for odonates in Galicia, NW Spain

  • Amorin M
  • Rano C
  • Barrueco F
 et al. 
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Abstract

The analysis of distribution data of odon. in NW Spain indicates the
presence of 49 spp. Macromia splendens, Oxygastra curtisii, Gomphus
graslini and Coenagrion mercuriale are protected under the European
Habitats Directive and Spanish Law. Localities of specimens collected
between 1978 and 2004 were situated in UTM squares of I Ox 10 km to
produce a map of species richness for the region. Additionally, all
localities (UTM 1 x 1 km) where protected and rare spp. were found are
introduced in a GIS system, on a map of the Natura 2000 network of the
region. The results indicate that 0 curtisii and C mercuriale are common
in NW Spain. As local rare taxa are identified Brachytron pratense,
Aeshna affinis and Erythromma viridulum, because they were found in less
than 10 squares, and are also relatively rare in the Iberian peninsula.
As areas of special interest are selected those that include all known
populations of M. splendens, G graslini, and B. pratense, all localities
with at least 2 of the 4 protected spp., and areas with more than 20
spp. This gives a list of 24 hotspots, most of them (15) at least
partially included in the Natura 2000 network. Unfortunately the
analysis also reveals that the knowledge of this group is clearly
fragmentary, with most records concentrated on the coastal region, and
very few squares sampled more than 20 times, the minimum to obtain
reliable data. Therefore a systematic sampling of the region is needed
to properly identify areas with high species richness.

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Authors

  • M Azpilicueta Amorin

  • C Rey Rano

  • F Docampo Barrueco

  • X C Rey Muniz

  • a Cordero Rivera

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