Kretische Azurjungfer
© Clemens M. Brandstetter
(from Boudot & al. 2009:48): Coenagrion intermedium is endemic to Crete, where it is relatively common all over the island. Although it is not presently threatened, the species is likely to decrease in the near future due to poor water management and changes in precipitation patterns related to climate change.
Die Kretische Azurjungfer, Coenagrion intermedium Lohmann 1990, kommt nur auf der Insel Kreta vor. Ursprünglich wurden die Tiere von Lohmann (1990) als ssp. von C. ponticum beschrieben; aufgrund der enormen Distanz (südliche Schwarzmeerküste) ist der Artrang sinnvoll und gerechtfertigt.
Auf den Seiten der IUCN finden sich folgende Hinweise und Forderungen: "C. intermedium has presumably declined as a result of rapid habitat destruction and degradation, human exploitation of water, water pollution, eutrophication and forest destruction. C. intermedium is threatened due to its restricted distribution and its few numbers of known localities (currently 13 places on nine streams). The current agricultural policy leads to the decrease of C. intermedium by allowing for and favouring the cultivation and irrigation of olive trees, the change of water regime of streams and streamlets and the destruction of bank side vegetation. Climatic change will also have a negative impact on breeding sites in the future, but this is already exacerbated by the increased water demand for agriculture and urbanized areas." Daher fordert man: "Control of water use and gallery forest preservation are required. The capture of springs and headwaters should be absolutely prohibited, whereas this kind of alteration clearly increases throughout Greece as a reaction to climate change. Erection of natural reserves involving the upper course of Cretan brooks is necessary. Mapping of populations is also needed, as current records are limited (only 13 from 1980 onwards)."
Insel Kreta – Foto: © Roger Blum.
Literatur:
Battin T. 1991: Description of the larva of Coenagrion intermedium Lohmann, 1990 from Crete, Greece (Zygoptera: Coenagrionidae). – Odonatologica 20(3): 333-336.
Battin T. 1992: Revision of the puella group of the genus Coenagrion Kirby, 1890 (Odonata, Zygoptera), with emphasis on morphologies contribution to reproduction isolation. In: T.J. Battin, Damsels and dragons: the impact of sex vicariance on speciation. – pp. 44-64, DiplArb. Univ. Wien.
Boudot, J.-P. 2010: Coenagrion intermedium. – In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 09 June 2014.
Boudot J.-P., V. J. Kalkman, M. Amorín, T. Bogdanović, A. Rivera, G. Degabriele, J.L. Dommanget, S. Ferreira, B. Garrigós, M. Jović, M. Kotarac, W. Lopau, M. Marinov, N. Mihoković, E. Riservato, B. Samraoui & W. Schneider 2009: Atlas of the Odonata of the Mediterranean and North Africa. – Libellula Supplement 9:1-256.
Lohmann H. 1990: Coenagrion ponticum intermedium subspec. nov. von der Insel Kreta, Griechenland (Odonata: Coenagrionidae). – Opuscula zoologica fluminensia 54: 1-7.