پديد آورنده :
قاسمي، سعيد
عنوان :
بررسي تنوع زيستگاهي و ژنتيكي حشره مولد گزانگبين (Cyamophila astragalicola; Gegechkori 1977)
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
محيط زيست (زيستگاه ها و تنوع زيستي)
محل تحصيل :
اصفهان : دانشگاه صنعتي اصفهان
صفحه شمار :
[سيزده]، [131]ص.: مصور(رنگي)، جدول، نمودار
استاد راهنما :
منصوره ملكيان
استاد مشاور :
مصطفي تركش اصفهاني
توصيفگر ها :
تغيير اقليم , تنوع ژنتيكي , گزانگبين , مطلوبيت زيستگاه , CO1
استاد داور :
محمدرضا وهابي، سعيد پورمنافي
تاريخ ورود اطلاعات :
1399/05/14
رشته تحصيلي :
منابع طبيعي
دانشكده :
مهندسي منابع طبيعي
تاريخ ويرايش اطلاعات :
1399/06/30
چكيده انگليسي :
Abstract Gaz angubin the manna used in the production of famous sweet GAZ of Isfahan or Khunsar fora long time has had special economic and medicinal value in Iran In recent years due to thesignificant decline in the population of the insect creating this manna Cyamophila astragalicola Gegechkori 1977 production and harvest of this valuable manna have decreased Climate change asa threatening factor of biodiversity has greatly affected species distribution Further Genetic diversityin species is required for evolutionary potential and adaptation to environmental changes that we canget an insight into the evolutionary history and dispersal ability by studying the gene flow betweenpopulations The current study aimed to model the current and future potential distribution of C astragalicola under the climate change scenario CCSM4 and to evaluate genetic variation of thespecies using the mitochondrial CO1 sequence Phylogenetic relationships were reconstructed usingIQ TREE software using 27 sequences of C astragalicola and sequences of other psyllids fromsuperfamily Psylloidea Distribution modelling was performed using MaxEnt model to select themost important variable based on the Jackkife test Graphical statistical environment of R software andBiomod2 package were then used to create an ensemble model Among the applicable models GBM GLM GAM and MaxEnt were used in the ensemble model to predict current habitat suitability andpossible changes in suitability under the climate change scenario The ensemble model revealed ahigher performance AUC 0 97 than single models The important variables in habitat selectioninclude Annual Mean Temperature BIO1 Precipitation of Driest Quarter BIO17 and NormalizedDifference Snow Index NDSI respectively Overall climate change modeling indicates thesensitivity of C astragalicola to climate change as such that in all Representative ConcentrationPathways e g RCP 2 6 and RCP 8 5 for the year 2050 and 2070 loss in suitable habitats wasevident In addition results revealed a negative effect of climate change especially an increase intemperature on habitat suitability of C astragalico as such that by increasing BIO1 in each scenario the predicted amount of suitable habitats was reduced Results of genetic variation in mitochondrialCO1 sequence confirmed the identification of C astragalicola by the morphological method and allsamples collected from populations in Isfahan and Chaharmahal va Bakhtiari Provinces belonged toone species Three haplotypes were observed in this study that all but two samples Owned sample byKhunsar and Koohrang belonged to the same haplotype The reason for the low genetic diversity inthese samples could be due to the same maternal lineage extensive gene flow continuity ofpopulations in the past and a possible range expansion of the species close to the present Key words Climate change Genetic diversity Gaz angubin Habitat suitability COI
استاد راهنما :
منصوره ملكيان
استاد مشاور :
مصطفي تركش اصفهاني
استاد داور :
محمدرضا وهابي، سعيد پورمنافي
