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Thessaloníki, Greece

Vougioukalou M.,University of Aegean | Akriotis T.,University of Aegean | Dimalexis A.,Hellenic Ornithological Society
Procedia Environmental Sciences | Year: 2011

The wetland of Chortarolimni is an island, seasonal wetland with brackish waters. Due to a drainage ditch installed in the 1970s the breeding wildfowl of the wetland (Mallard, Common Shellduck, Ruddy Shellduck, Black-winged stilt and Eurasian Coot) suffers from the early seasonal draught. After an ecological assessment of the site, which involved a site visit and analysis of previous reports on the wetland, restorative measures were identified and designed to conserve the breeding waterfowl by enhancing the availability of open water and pond habitats during the waterfowl breeding period. Successful monitoring of the restoration measures will enhance the wetland ecosystem services and the ecotourism potential of the area. © 2011 Published by Elsevier Ltd. Source

Kassara C.,University of Patras | Fric J.,Hellenic Ornithological Society | Gschweng M.,University of Ulm | Sfenthourakis S.,University of Patras
Journal of Ornithology | Year: 2012

Eleonora's Falcon (Falco eleonorae) is an endemic breeder of the Mediterranean Sea and the Canary Islands that overwinters in Madagascar and surrounding areas. Recent telemetry studies have revealed the migratory journey of falcons from the western and central Mediterranean breeding colonies. Our study complements the puzzle of the species' migration providing data from an eastern Mediterranean breeding colony. In this paper, we describe for the first time the migratory routes of four falcons originating from the Aegean Sea, the core of the species' breeding range. We tracked two adults and two immature siblings to their wintering grounds in Madagascar. According to our results, the timing of migration was consistent with previous studies. Our findings also suggest that the falcons adjust their flight speed according to the environmental conditions encountered en route, by accelerating during open-sea and desert crossings and by slowing down in potential foraging areas. Moreover, the selection of common staging areas, both among the two siblings and among the two adults, highlights the role of these areas in the migratory cycle of the species. Finally, according to the home-range analysis on the wintering grounds, space use was rather variable across the four tracked falcons. Still, the falcons were more frequently observed within the submontane forest, one of the last patches of primary rainforest in Madagascar. Thus, future studies aiming at unveiling the ecological requirements of the species in its wintering quarters are considered as top priority. © Dt. Ornithologen-Gesellschaft e.V. 2012. Source

Kassara C.,University of Patras | Dimalexis A.,Hellenic Ornithological Society | Fric J.,Hellenic Ornithological Society | Karris G.,Technological Educational Institution TEI of the Ionian Islands | And 2 more authors.
Journal of Ornithology | Year: 2012

Eleonora's Falcon breeds colonially on small islands of the Mediterranean Sea and Macaronesia. Despite the wealth of papers highlighting the importance of nesting characteristics on this species' breeding performance, few have addressed the issue of nest-site selection explicitly. In this paper, we develop presence-absence and presencepseudoabsence models to predict nest occurrence as a function of the topography of the nesting territory. Nest occurrence data were available for nine uninhabited islets of the Aegean Sea, within which the majority of the global population of Eleanora's Falcon is encountered. Our findings suggest that the presence of conspecifics together with certain topographic features according to the surface area of the islet being studied can be used to predict nest occurrence on uninhabited islets of the Aegean Sea. We conclude that predictive models characterized by flexibility and/or the use of absence data that also consider nest clustering can result in robust predictions of the nest occurrence of Eleonora's Falcons in Greek breeding colonies and eventually facilitate future monitoring schemes. Since this is the first time nest-site preferences of Eleonora's Falcon have been analyzed using species distribution models, we encourage the application of similar methodologies to other areas within the species' breeding range to further validate our findings. © Dt. Ornithologen-Gesellschaft e.V. 2011. Source

Tsiamis K.,Hellenic Center for Marine Research | Tsiamis K.,European Commission - Joint Research Center Ispra | Aydogan O.,Celal Bayar University | Bailly N.,Hellenic Center for Marine Research | And 29 more authors.
Mediterranean Marine Science | Year: 2015

The Collective Article 'New Mediterranean Biodiversity Records' of the Mediterranean Marine Science journal offers the means to publish biodiversity records in the Mediterranean Sea. The current article is divided in two parts, for records of native and alien species respectively. The new records of native species include: the neon flying squid Ommastrephes bartramii in the waters surrounding the island of Capri, Thyrrenian Sea; the bigeye thresher shark Alopias superciliosus in the Adriatic Sea; a juvenile basking shark Cetorhinus maximus caught off Piran (northern Adriatic); the deep-sea Messina rockfish Scorpaenodes arenai in the National Marine Park of Zakynthos (East Ionian Sea, Greece); and the oceanic puffer Lagocephalus lagocephalus in the Adriatic Sea. The new records of alien species include: the red algae Antithamnionella elegans and Palisada maris-rubri, found for the first time in Israel and Greece respectively; the green alga Codium parvulum reported from Turkey (Aegean Sea); the first record of the alien sea urchin Diadema setosum in Greece; the nudibranch Goniobranchus annulatus reported from the South-Eastern Aegean Sea (Greece); the opisthobranch Melibe viridis found in Lebanon; the new records of the blue spotted cornetfish Fistularia commersonii along the Alicante coast (Eastern Spain); the alien fish Siganus luridus and Siganus rivulatus in Lipsi Island, Dodecanese (Greece); the first record of Stephanolepis diaspros from the Egadi Islands Marine Protected Area (western Sicily); a northward expansion of the alien pufferfish Torquigener flavimaculosus along the southeastern Aegean coasts of Turkey; and data on the occurrence of the Lessepsian immigrants Alepes djedaba, Lagocephalus sceleratus and Fistularia commersonii in the waters surrounding the island of Zakynthos (SE Ionian Sea, Greece). Source

Kazantzidis S.,Hellenic Agricultural Organization Demeter Forest Research Institute | Yfantis G.,Hellenic Ornithological Society | Poirazidis K.,Technological Education Institute of Ionian Islands
Journal of Biological Research (Greece) | Year: 2013

Heron and egret colonies are widely distributed in the Greek wetlands. Among the seven colonially breeding heron species with 6097 nests in 44 colonies in 2009, Grey Heron (Ardea cinerea) was the most widespread and Little Egret (Egretta garzetta) the most numerous. Twenty-five factors were for the first time co-evaluated in order to detect possible influences on the heron colonies species composition and species nest abundance. We used direct (detrended correspondence a nalysis), indirect (canonical correspondence analysis) gradient analysis and Kendall's tau correlation. At least, seven significant factors were detected which explained 43.14% of the total variability regarding species composition of heron colonies. Eight more factors influence, positively or negatively, nest abundance of certain heron species. The analysis revealed that a diverse feeding habitat, especially with freshwater marshes, mostly in protected areas could potentially host a mixed colony, including Squacco Heron (Ardeola ralloides), Little Egret and non-Ardeidae species. Woods and reed beds within rice fields are potential heron colony sites, especially for Blackcrowned Night Heron (Nycticorax nycticorax). Trees are the main nesting habitat for Grey Heron whi le reed beds for Purple Heron (Ardea purpurea) and Squacco Heron. The presence of Ardeidae and non-Ardeidae species in a colony influences the nesting of Squacco and the Blackcrowned Night Heron. The maintenance of wood patches near wetlands, the creation of freshwater marshes and the protection of these around the existing colonies as well as the establishment of a buffer protection zone around certain colonies, are the proposed conservation actions for the protection of heron colonies. Source

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