İsmail Kudret SAĞLAM, Selim Süalp ÇAĞLAR

Renk Bakımından Polimorfik Olan Çayır Çekirgesi Isophya rizeensis Sevgili, 2003 (Orthoptera: Tettigoniidae)’nin F›rt›na Vadisi İçerisindeki Yerel Populasyon Büyüklükleri ve Dinamikleri

Isophya rizeensis Sevgili, 2003 (Orthoptera: Tettigoniidae) Türkiye’nin kuzey-güneyinde bulunan F›rt›na Vadisine endemik ve renk bak›m›ndan polimorfik olan bir çay›r çekirgesidir. Bu çal›flma I. rizeensis’in F›t›na Vadisi içerisindeki 13 istasyondaki yerel populasyon büyüklüklerini ve dinamiklerini ortaya koymaktad›r. Yerel populasyon büyüklü¤ü istasyonlar aras›nda büyük farkl›l›klar gösterdi¤i ve Hopkins’in biyoklimatik kural› do¤rultusunda farkl› yüksekliklerde bulunan istasyonlarda nimf ç›k›fl› ve erginleflme bak›m›ndan birer haftal›k gecikmeler gözlemlenmifltir. Bu çal›flmdan elede edilen sonuçlar do¤rultusunda F›rt›na Vadisi içerisinde bulunan I. rizeensis populasyonunun bir birinden farkl› ekolojik bask›lar alt›nda bulunan bir kaç yerel populasyonundan meydana gelen bir metapopulasyon oluflturdu¤u söylenebilir.

Anahtar Kelimeler:

Isophya rizeensis, çay›r çekirgesi, populasyon büyüklüğü, metapopulasyon, dağılım

Local Population Size and Dynamics of the Color Polymorphic Bush Cricket, Isophya rizeensis Sevgili, 2003 (Orthoptera: Tettigoniidae) within the F›rt›na Valley

Isophya rizeensis Sevgili, 2003 (Orthoptera: Tettigoniidae) is a color polymorphic bush cricket endemic to the Fırtına Valley in the northeast of Turkey. This paper describes the local population size and dynamics of the species distributed in 13 different habitat patches within the Fırtına Valley. Local population size varied greatly between sites, and a 1-week delay in nymph emergence and maturation was recorded at the highest habitat patch relative to all habitat patches located at lower altitudes. The results given in this paper suggest that the I. rizeensis population in the Fırtına Valley constitutes a metapopulation made up of several local populations under partially different ecological pressures.

Keywords:

Isophya rizeensis, bush cricket, population size, metapopulation, distribution,

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