ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Libellula Jahr/Year: 2010 Band/Volume: 29 Autor(en)/Author(s): Knijf Geert De, Demolder Heidi Artikel/Article: Odonata records from Alentejo and Algarve, southern Portugal 61-90 ©Ges. deutschspr. Odonatologen e.V.; download www.libellula.org/libellula/ und www.zobodat.at Odonata records from Alentejo and Algarve 15. August 201061 Odonata records from Alentejo and Algarve, southern Portugal Geert De Knijf and Heidi Demolder Research Institute of Nature and Forest (INBO), Kliniekstraat 25, B-1070 Brussels <
[email protected]>, <
[email protected]> Abstract During two field trips in summer 2008 and spring 2009 to the Alentejo and Algarve in southern Portugal, we altogether recorded 42 species of Odonata at 112 localities. All localities were classified in one of the following five categories: streams, rivers, ponds and pools, reservoir lakes, and brackish waters. Seventeen species are categorised as rheophilous and twelve as having a clear preference for standing waters. Remarkable records of Lestes dryas, Onychogomphus forcipatus, O. uncatus, Paragomphus genei, Or- thetrum chrysostigma, O. coerulescens, O. nitidinerve, O. trinacria, Diplacodes lefebvrii, Brachythemis impartita and Zygonyx torridus are presented in detail and discussed, and a regional distribution map is provided for most of them. With 35 species, the Odonata fauna of southern Portuguese streams and rivers is rich and diverse. This diversity can be explained by the high naturalness of many fluvial systems, resulting in a high degree of variation in velocity and substrate, and by the regionally warm climate. Nearly all endemic and threatened species are restricted in the region to running waters.