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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Wetlands and dragonflies under threat in the Gediz delta, Türkiye (2025)
Auteurs :	Philippe Lambret, Auteur ; Şafak Arslan, Auteur ; Lisa Ernoul, Auteur ; Anthony Olivier, Auteur ; Serdar Özuslu, Auteur ; Çağdaş Yaşar, Auteur ; Özge Yaylalı, Auteur
Type de document :	Article
Dans :	Dragonfly Conservation Europe Newsletter ((en ligne) August,2025)
Article en page(s) :	12-14
Langues:	Anglais
Mots-clés :	TdV ; Gediz ; Zone humide ; Lestes macrostigma ; Impact activités humaines
Résumé :	The Gediz delta covers ca. 400 km², most of which is occupied by agricultural crops (mainly cereals and cotton). Despite the designation of large portions of the delta as protected areas, many pressures continue to threaten the ecologically sensitive zones. Pressures such as urban expansion, water over-abstraction, intensive grazing, spread of invasive plant species, and unsustainable agricultural practices are accentuated by the lack of integrated management and enforcement of policies. In addition, the dominant wind direction and geographical position of the delta contribute to the transport of anthropogenic pollution into the area. Pesticides and fertilizers from surrounding agricultural lands, further degrades the quality of wetlands. Irrigation needs have intensified during the last decades, resulting in illegal damming and an increase in pumping water from the Gediz River. As a result, the freshwater inflows feeding the remaining natural habitats have dramatically decreased, leading to the salinization of many wetlands. This reduction in freshwater input has also led to habitat fragmentation, further isolating temporary wetland patches and negatively affecting species dispersal and ecosystem connectivity. In addition, recent changes in the hydraulic management of some protected areas of the delta have changed some wetlands into pasturelands. Although grazing pressure in the delta has not been quantified, field observations indicate that livestock —particularly cattle and sheep— enter the ponds and disturb the vegetation along the banks. This practice is likely to have negative impacts on dragonfly larvae, especially with the reduction of plant shoots that the larvae need for metamorphosis. Given that dragonflies are often used as bioindicators, their decline may reflect broader ecosystem degradation throughout the delta.
En ligne :	https://www.gbif.org/occurrence/download/0001637-250525065834625

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