ارزیابی تنوع زیستی کنه های زیرراسته اوریباتیدا(oribatida) به جز (astigmatina) در بخش‌هایی از شهرستان کرمانشاه

به منظور بررسی تنوع زیستی کنه های زیرراسته اوریباتیدا شهرستان کرمانشاه، دو منطقه شامل ساحل رودخانه قره‌سو و پارک طاق‌بستان انتخاب و نمونه‌برداری‌هایی به صورت ماهانه از مرداد سال 1396تا مرداد سال 1397 انجام گرفت. در هر نمونه‌برداری به صورت تصادفی حجمی از خاک به اندازه 25 ×20 ×20سانتی‌متر معادل 4-6 بیلچه از خاک درون کیسه‌های پلاستیکی قرار داده و به آزمایشگاه منتقل شد. در آزمایشگاه با استفاده از قیف برلیز کنه‌ها جداسازی شد و سپس جهت شناسایی از آنها اسلایدهای میکروسکوپی تهیه گردید. در مجموع 16 گونه از این دو منطقه جمع‌آوری شد. از میان گونه‌های جمع‌آوری شده، گونه thor, 1930 scheloribates fimbriatus به عنوان گونه غالب در هر دو منطقه شناسایی شد. گونه‌های passalozetes sp. near. africanus grandjean, 1932 ، ramusella sengbuschi sengbuschi hammer, 1968 و haplochthonius sanctaeluciae bernini, 1973 فقط از ساحل رودخانه قره‌سو و گونه‌های cosmochthonius reticulatus grandjean, 1947، multioppia (hammeroppia) wilsoni moritz, 1966 و spheroctonius splendidus (berlese, 1904) فقط از پارک طاق بستان و سایر گونه ها از هر دو منطقه جمع‌آوری شدند. بررسی تنوع گونه‌ای با استفاده از شاخص تنوع شانون وینر در هر دو منطقه انجام شد. این شاخص در پارک طاق‌بستان 142/0±1.71 و در ساحل رودخانه قره‌سو 226/0±96/1 محاسبه شد.

biodiversity of oribatid mites (except astigmatina) in two locations of kermanshah county

background and objectivesthe members of suborder oribatia (acari) are among the most abundant and significant groups of soil arthropods, playing a crucial role in the decomposition of organic matter and soil fertility (labandeira et al., 1997; behan pelletier, 1999). these mites are easily sampled throughout all seasons due to their abundance and diversity (lebrun van straalen, 1995; behan-pelletier, 1999). however, there have been limited studies on the biodiversity of these mites in iran (ramezani mossadegh, 2014-b; azimi et al., 2016; arab yabarati, 2014; farzaneh et al., 2022). considering the importance of oribatid mites in soil ecosystems and the absence of research on the fauna and biodiversity of this group in kermanshah, this study aimed to investigate the species diversity of these arthropods in selected parts of kermanshah county.materials and methodstwo different areas, the shore of the qarasu river and taq bostan park, were selected for monthly soil sampling from august 2016 to august 2017 in kermanshah. five soil samples with dimensions of 25 x 20 x 20 cm³ were randomly collected from each area. to assess biodiversity and evenness indices in each region, the shannon-wiener diversity index and pailou equitability index were employed using sdr version 4 software (seaby henderson, 2006).resultsin the sampling conducted at the qarasu river beach and taq bostan park in kermanshah from august 2016 to august 2017, a total of 16 species were collected, with 13 species from taq bostan park and 13 species from the qarasu beach. the highest relative abundance (40%) on the qarasu river beach was recorded for scheloribates fimbriatus, followed by oribatula (zygoribatula) connexa connexa (14%) and galumna iranensis (12%). at taq bostan park, scheloribates fimbriatus had the highest relative abundance (43%), followed by galumna iranensis (22%), and acrotritia pirovaci (16%).discussionin the sampling conducted in two areas, a total of 16 species belonging to 15 genera and 10 families of oribatida were collected. initially, during mid-summer 2017, the mite population and biodiversity in the soil were low, gradually increasing with decreasing temperatures and the onset of autumn. various factors influence the relative abundance and biodiversity indices of oribatid mites in different habitats, including vegetation diversity, climate, temperature, humidity, soil ph (li et al., 2005), and seasonal changes (salman, 2003). vegetation type also plays a crucial role in ecosystem stability (cuevas-reyes et al., 2004). this study found higher mite diversity on the qarasu river beach due to greater weed diversity and denser vegetation compared to taq bostan park. mite abundance and diversity increased in autumn with decreasing temperatures and decreased significantly in june, the beginning of the hot season. the equitability of species fluctuated throughout sampling dates, reaching its highest level (0.58) in november, partly due to uniform species abundance and decreased dominance of certain species. it is concluded that oribatida biodiversity was low in both investigated areas in kermanshah county, a finding supported by the evenness index.