Response Of Cicadellidae Community Structure And Its Diversity To Restoration Of Ecological Function In Karst DesertificationControl Areas

Gui Zhou is a region with typical and centralized karst in China. The rocky desertification caused by unreasonable people activities lead to the deterioration of the ecological environment in this region and limitation of the economic and social development. Roky desertification control is very urgent. The rocky desertification control in Gui Zhou represents the history of roky desertification in China and has made a lot of achievements. Ecological restoration of roky desertification is a long and dynamic process and will keep changing with the effect of many factors. Accurate monitoring and evaluation of this dynamic process not only benefit for conduction of ecological restoration, but also provide supports for decisions in justification and improvement of restoration schemes. We chose two typical karst landforms as model zones in Gui Zhou. Salaxi Chaoying small basin in Bi Jie was chose as the karst plateau mountainous with potential-light rocky desertification and Guanling-Zhenfeng Huajiang basin was chose as the karst plateau valley with moderate-intensive rocky desertification. We first chose Cicadellidae as indicator organism to study Cicadellidae community in karst rocky desertification control area and monitor and evaluate the ecological restoration based on the theories about ecology recovery science, insect ecology and biodiversity. Our study is a major topic based on Scientific Support Project of National Twentieth “Five-year”. “3S” technology, insect collection, microscope, stereoscope, SPASS20.0 were used for insects collection, classification and verification. The change of Cicadillidae community response to ecological environment was studied. We investigated the relationship between rocky desertification control and the structure of Cicadillidae community and evaluated the effect of rocky desertification in ecological restoration and reached the conclusions below:(1)After investigating the structure of Cicadillidae community in Chaoying small basin and Dingtan small basin with different rocky desertification grades for two years, we found that the predominant species in this two basins are Typhlocybinae, Deltocephalinae and Cicadellinae. The space characterization of genera number, individuals number, species diversity index and species richness index in model zones with potential, light, moderate and intensive rocky desertification is that potential rocky desertification > light rocky desertification > moderate rocky desertification > intensive rocky desertification. The lower rocky desertification grade and higher successional stage are, the more complicate structure of plants and ecological environment and richer Cicadillidae species and number are, and vice versa. The structure of Cicadillidae community in Chaoying small basin is more complicate than that in Dingtan small basin according to the all characterizations. In turn, this conclusion shown that Chaoying small basin is a control region about karst plateau mountainous with light- moderate rocky desertification and Dingtan small basin is a control region about karst plateau valley with moderate-intensive rocky desertification.(2)We shown that the structure change of Cicadillidae community in Chaoying small basin is more obvious than Dingtan small basin every month according to the study bout the structure changes of Cicadillidae community in Chaoying small basin and Dingtan small basin. The structure characterization indexes of Cicadillidae community in model zones with different rocky desertification grade is higher even highest in July and August and is lower in May and October. The main reason is that the condition in July and August with higher temperature and better plant growth is benefit for the growth, development and reproduction of Cicadillidae.(3)We set sample zones in Chaoying small basin and Dingtan small basin and control and found that the genera number, individuals number, diversity index and richness index of Cicadillidae community in two small basins is higher than control by using spatial method instead of time method. The ecological environment in small basin developed to normal succession, the rocky desertification standard been improved and the diversity of Cicadillidae response to the environment changes is more complicate after control by many kinds of methods and many years’ rocky desertification control.(4)We found that the number of genera and individuals in the potential rocky desertificationsample zones in Chaoying small basin with different plant typies: Rosa roxbunghii-Juglans regi a–Secale cereale>Populus L.-Secale cereale>Walnut forest–Trifolium repens L..The number of gen era and individuals of Cicadillidae in the sample zones with light rocky desertification with Hyp ericum monogynum L.–Secale cereale>Rosa roxbunghii–Juglans regia–Bromus cartharticus Vahl.>Rosa roxbunghii–Juglans regia–Trifolium repens L..The number of genera and individuals of Cic adillidae in the sample zones with moderate rocky desertification zone with Rosa roxbunghii-Jugl ans regia-Grass>Hypericum monogynum L.-Artemisia>Cyclobalanopsis glauca(Thunb.) Oerst.-Bush es.The characterization of Cicadillidae community structure in Dingtan small basin with differentplant types is that the number of genera and individious in the light rocky desertification zonewith Zanthoxylum bungeanum Maxim.-Lonicera japonica Thunb.-Grass>Zanthoxylum bungeanu m Maxim.-Agriculture.,in the moderate rocky desertification zone with Ailanthus altissima-Lonicera japonica Thunb.>Zanthoxylum bungeanum Maxim.-Cactuses –Grass,and in the intensive rocky d esertification zone with Broussonetia papyrifera-Ailanthus altissima-Grass>Zanthoxylum bungeanu m Maxim.-Grass.(5)We found that the Cicadillidae community in Chaoying small basin with more complicated structure and higher genera number and individuals number index than Dingtan small basin by comparison of Cicadilldae community in this two regions with same rocky desertification grade. The diversity of Cicadillidae is closely related to the species and structure diversities of plants. The higher ecological frangibility of Dingtan small basin caused by using pesticides extensively in large area with Zanthoxy for economic effect lead to destruction of the diversity of Cicadilldae. We should improve the diversity of plants during rocky desertification process in Dingtan small basin to restore the diversity of Cicadillae. We can construct an three-dimensional layered mode of arbor-shrub-lawn to improve the diversity of Cicadillae community structure and balance the economic effect and ecological effect.