انتخاب مناطق لانه گذاری دارکوب سوری (dendrocopus syriacus) در منطقه نایین، استان اصفهان

مقدمه: در این تحقبق، مناطق لانه گذاری دارکوب سوری (dendrocopus syriacus) در عرصه های طبیعی شهرستان نائین، جهت بررسی انتخاب گردید.مواد و روش ها: کار یافتن لانه های این پرنده در منطقه با استفاده از یک تیم چند نفره در بهار 1398 و با استقرار ترانسکت های تصادفی به طول 2000 متر بروی نقشه و استقرار آن در منطقه در طی انجام عملیات میدانی انجام گرفت. تعداد 65 لانه این پرنده برروی درختان شناسایی گردید و مختصات لانه ها با کمک gps ثبت گردید. در ابتدا ارتفاع و قطر دهانه لانه ها اندازه گیری شد. سپس متغیرهای زیستگاهی در اطراف لانه شامل نوع، ارتفاع و قطرگونه های گیاهی به تفکیک هر گونه، فاصله لانه تا نزدیک ترین منبع آبی و جاده محاسبه گردید. به تعداد لانه ها، 65 نقطه عدم حضور نیز شناسایی گردید و بعد از ثبت مختصات، متغیرهای فوق در آن ها هم اندازه گیری شدند. نتایج: براساس مشاهدات، 75.38 درصد از آشیانه های دارکوب سوری در شهرستان نائین بروی درخت توت ((morus alba قرار گرفته است. نتایج آزمون t نشان داد که اختلاف معنی داری از لحاظ برخی متغیرهای زیستگاهی بین مناطق حضور و عدم حضور از لحاظ آشیانه های دارکوب سوری وجود دارد. فاصله متوسط لانه ها تا نزدیک ترین منبع آبی در مناطق حضور به طور معنی داری کم تر از مناطق عدم حضور بود (0.05>p). بحث و نتیجه گیری: جهت حفاظت از جمعیت دارکوب سوری حفظ درختان توت و جلوگیری از تخریب زیستگاه در کنار حفظ و ایجاد منابع آبی جدیدتر، الزامی به نظر می رسد.

hole site selection by syrian woodpecker (dendrocopus syriacus)in naeen, isfahan province

introduction: in this research, the nesting areas of the syrian woodpecker (dendrocopussyriacus) in the natural region of naeen township were selected for investigation.materials & methods: the job of finding the nests of this bird was done by a multipersonnel team in the spring of 2015 by establishing random transects with a length of 2000meters on a map in the area during field operations. 65 nests of this bird were identified ontrees and the coordinates of the nests were registered by gps. initially, the height anddiameter of the opening of the nests were measured and then the habitat variables includingtype, height, and diameter of plant species for each species, the distance of the nest to thenearest water source and road around the nests were calculated. by randomly distancing thenests from different directions, the job of finding the control points or their absence wasdone. in these areas, no trace of the syrian woodpecker nests was found. 65 absence pointswere also identified for the number of the nests and after registering the coordinates, theabove variables were also measured.result: according to our observations, 75.38 percent of the nests had been established onmulberry trees (morus alba). due to its having more nectar, the mulberry tree is a moresuitable food source for the syrian woodpecker chicks. furthermore, the soft bark of thistree is more economical and easier than that of walnut (juglan nigra) and almond(amygdalus sp) trees with hard barks. the results of the t-test showed that there was ameaningful difference between the presence and absence regions in terms of some habitatvariables for the syrian woodpecker’s nests. the average distance of the nests to the nearestwater source in the presence regions was meaningfully less than that in the absence regions(p<0.05). our study region was part of the desert areas of iran and consequently the needfor water was a vital parameter; furthermore, water sources absorb more insects to theirsurfaces which are a food source for the chicks of this bird bringing about their existence.no meaningful difference was obtained in terms of the height and diameter of mulberrytrees as well as the average distance to the road between the presence and absence regions.it can be due to the aged mulberry trees (no obvious external difference) along with lowtraffic which do not have much effect on the nesting of syrian woodpecker.conclusion: to protect the syrian woodpecker population by paying attention to theimportant ecological role of this bird in naeen region for the control of insects and pests, itseems necessary to protect the mulberry trees and prevent the destruction of this bird’shabitat along with the protection and provision of new water sources.