کارآیی شاخص‌های پارامتری در تعیین تنوع زیستی تریپس‌ها (Insecta: Thysanoptera) در دو اکوسیستم مختلف

This study aimed to determine the efficiency of parametrical indices (rank-frequency distribution models) to evaluate diversity of thrips in two ecosystem fields (Lentil and Chickpea) and rangeland of Eyvan (Ilam province) during 2018. Sampling was performed weekly and by beating chickpea, lentil and rangeland plants onto a white dish tray. Microscopic slides were prepared and all samples counted. Then, parametrical indices were evaluated using SDR (Species Diversity and Richness), Ver. 4 software. A total of 11135 samples belonging to 14 species and nine genera were collected. Species include Thrips meridionalis (Priesner), Frankliniella occidentalis (Pergande), Aeolothrips intermedius Bagnall, Haplothrips ganglbaueri Schmutz, Thrips tabaci Lindeman, Aeolothrips collaris Prienser, Frankliniella intonsa (Trybom), Frankliniella tenuicornis (Uzel), Anaphothrips sudanensis Trybom, Scolothrips longicornis Priesner, Sitothrips arabicus Priesner, Kakothrips pisivorus (Westwood), Thrips vulgatissimus Haliday and Melanthrips fuscus (Sulzer). based on species - abundance models including geometric series, logarithmic series, lognormal and broken stick, thrips diversity were fitted for each ecosystem and the best distribution model based on the p˃0.5 was selected. Also, diversity of thrips in chickpea and lentil and rangeland using diversity ordering curves (Renyi), and k-dominance were compared. The results of chi-square test showed that in rangeland two models lognormal (Chi-square= 0.026, P= 0.872) and broken stick (Chi-square = 0.0322, P= 0.852) suitable and the best model for diversity of thrips in rangeland was the lognormal model. Also the results of chi-square test showed that in chickpea field two models lognormal (Chi-square = 0.981, P= 0.321) and broken stick (Chi-square = 1.324, P= 0.244) suitable and the best model for diversity of thrips in chickpea was the lognormal model. The results of chi-square test showed that in lentil models geometric series (Chi-square =15.981, P= 3.295) and lognormal (Chi-square = 5.635, P= 1.751) suitable and the best model for diversity of thrips in lentil was the geometric series model. Also, diversity ordering curves (Reyni) and k dominance showed that the highest diversity of thrips species belonged to rangeland and chickpea and lentil fields were ranked next.