Diets Niche Characteristics Of Three Kinds Of Lizards By Diverse Disturbance

Ordos attraction fort three samples collected from Inner Mongolia autonomous region in 379 lizards of the stomach contents were analyzed, and the grassland sand lizards(Phrynocephalus frontalis)47,dense point hemp lizard(Eremias multiocellata)48,beautiful spot hemp lizard(Eremias Argus)31,the stomach cutting method is adopted for analysis of respectively analyze their food quantity percentage and frequency,diversity index,nutritional niche breadth, niche overlap value of nutrition and competitiveness index,and beneficial coefficient.The main results were as follows:(1) Under different interference through the stomach capacity analysis of three kinds of lizards found three kinds of lizards are omnivorous animals, including some insects and arachnids and plant-based foods. Under the same disturbance, different lizard food preference types. Under different disturbance, the same lizard food preference species also have differences.(2) Under different interference based on three kinds of lizards food niche and diversity analysis found that three kinds of sample area in ephedra sample area index of food percentage similarity, lowest natural sample to the highest index of food percentage similarity. In the natural sample to Micronesia point ma lizard food diversity index, ecological width, evenness index were the highest. In Yang Chai sample, sample ephedra three sets of data are the beautiful spot was the highest lizard.(3) Under different interference based on three kinds of lizards niche overlap and competition analysis found that in natural sample to Micronesia hemp lizard and li ma lizard in the niche overlap index O (0.621) is the largest, followed by continuous Yang Chai grassland sand lizards and li ma lizard in the niche overlap index O (0.571). Grassland sand lizards in ephedra sample and hemp lizard in the niche overlap index O (0.284).Natural sample to Micronesia point hemp lizard competitiveness index of beautiful spot hemp lizard alpha= 0.997 as the highest, followed by the beautiful spot to close the hemp lizard point the lizard’s competition index of alpha= 0.903. Yang Chai grassland sand lizards in the sample area of the size of hemp lizard competition index of alpha= 0.045 is lowest. The beautiful spot hemp lizard competitiveness index of grassland sand lizards alpha= 1.527>1.(4) Through the study of the evolution of three kinds of lizards harm evaluation, the total beneficial coefficient of three kinds of lizards are positive, harmful insects feeding more than beneficial insects, more benefits than harm to human beings.