Effects of patch quality on population characteristics of the Chrysolina aurichalcea
Artemisia ordosica is the main windbreak and sand-fixing plant in desertification areas of northwest China,which plays a very positive role in soil desertification control,ecological environment protection and ecological balance stability.In this study,four patches of Artemisia ordosica were selected from Guyaozi(GYZ-A and GYZ-B),Changliushui(CLS)and Liujiazhai(LJZ)in Ningxia Baijitan National Nature Reserve,China.The population of Chrysolina aurichalcea in different patches was investigated from June to September,2020.The morphological characteristics,sex ratio and effect of patch characteristic indices,biological and abiotic factors on the population of Chrysolina aurichalcea were analyzed in different patches.The results showed that the population of Chrysolina aurichalcea and the ratio of infested shrub were significantly different(P<0.05)in different patches.The individuals were 2.28-10.43 at each brush,and the ratio of infested shrubs was 56.02%-90.56%.There were more females than males of Chrysolina aurichalcea adults in different patches(P<0.05).The sex ratios of GYZ-A,GYZ-B,CLS and LJZ patches were 1.38:1,1.05:1,1.2:1,1.23:1,respectively.There were significant differences in body weight(0.03 g-0.05 g),body length(6.89 mm-3.76 mm)and body width(4.09 mm-4.71 mm)between patches(P<0.05).Multiple stepwise regression analysis showed that plant richness index(P<0.05),growing of Artemisia ordosica(P<0.01),and soil total nitrogen(P<0.05)had significant correlation with the population of Chrysolina aurichalcea.Principal component analysis showed that the coverage of Artemisia ordosica,plant diversity index and soil organic matters were the key factors affecting the population structure of Chrysolina aurichalcea in different patches.
patch qualityChrysolina aurichalceapopulation structureratio of infested shrubsex ratio
万方数据
维普
