5606

5240

كارشناسي ارشد

محيط زيست

اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي

1389

سيزده،85ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

محمودرضا همامي

منصوره ملكيان

15/10/89

نصرالله محبوبي صوفيائي، سيما فاخران

مهندسي منابع طبيعي

ID5240

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Habitat selection and niche partitioning by sympatric lizard species in Kolah Ghazi National Park Zahra Safari Kang z kang@na iut ac ir 23 09 2010 Department of Natural Resources Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisor M R Hemami Assist Prof mrhemami@cc iut ac ir Abstract Niche segregation of four sympatric lizards species Mesalina watsonana Phrynocephalus scutellatus Trapelus agilis and Laudakia nupta was examined at three important niche dimensions time space and food in Kolah Ghazi National Park Four habitat types were determined in the study area and within each of them overall 12000 m line transect was traversed For each observed lizard a number of microhabitat variables were measured within 5 5 m plots Lizards were studied in terms of activity time escape tactics morphometric charachteristics and diet Overlap in resource use was assessed for three important niche dimensions and compared with overlap obtained through random Monte Carlo permutations Niche breadth of each of the lizard species was calculated for each niche dimensions using the reciprocal of Simpson s diversity index Habitat of Laudakia nupta was spatially separated from the other three lizard species Microhabitat use was significantly different between Phrynocephalus scutellatus Mesalina watsonana and Trapelus agilis However the activity time of these lizard species was more or less similar Body temperature of the lizard species was highly correlated with soil temperature Escape tactics significantly differed among the four species Food diet of Laudakia nupta was mainly consisted of a kind of Scrabaeid beetles Coleoptera and fruits Termites an Argid species of Hymenoptera and plants have constituted the diet of Mesalina watsonana Ants Formicidae with different sizes recognized as the main food of Trapelus agilis and Phrynocephalus scutellatu The chosen prey size was proportional with lizard s morphometry Mean volume of prey mean number of prey and mean volume of stomach contents were significantly different between the lizard species The highest and lowest overlap was observed in temporal and food dimensions of the niche respectively Result of Monte Carlo simulations determined that niche segregation in food and space among these lizards was not based on chance Among the four lizard species Trapelus agilis had the greatest niche breadth in time space and food dimensions Space and food recognized as the most important niche dimensions contributing to resource partitioning by the studied lizard species Key words niche segregation habitat selection lizard Mesalina watsonana Phrynocephalus scutellatus Trapelus agilis Laudakia nupta and Kolah Ghazi National Park

محمودرضا همامي

منصوره ملكيان

نصرالله محبوبي صوفيائي، سيما فاخران