Research Of Chengdu Forest Bird Ecological Security Pattern Based On 3S Technology

A series of security problems like urban ecology arise from the development of regional economy and society.It may seriously affect the regional ecological sustainable development.With frequently intensified human activities,how to mitigate and deal with the adverse effect of rapid urbanization has already become a pressing issue.Moreover,an important consensus about environmental problems in urbanization is a process to optimize the regional ecological structure,construct ecological security pattern,protect and recover necessary regional ecology.At present,the concept of ecological security pattern still remains in the concept phase and how to feasibly support the space planning measures has become a main problem.Chengdu is the provincial capital of Sichuan Province.Besides,it's an important city within the Chengdu-Chongqing Economic Circle.In recent years,with the acceleration of urban development,the issues on urban landscape pattern and ecological environment have been more and more obvious.Under this background,aiming at the region ecological environment problem and studying on the urban landscape regulatory mechanism in this paper has important practical significance and theoretical significance.Take Chengdu as the research sample,utilize the guidance of relevant theories and methods including ecology,landscape ecology,remote sensing science,geographic information system science,follow the research idea “pattern dynamics-ecological environment corresponding-ecological security pattern construction”,take advantage of remote sensing satellite images,adopt 3S Technologies and relevant analytical methods to study on the change features and driving mechanism of landscape pattern of Chengdu city from 1995 to 2015.Analyze the landscape connectivity change features of forest land and water body under the background of urbanization.On this basis,aiming at the issue of depressed forest landscape connectivity in Chengdu within twenty years,build a forest-land ecological network security pattern with virtual species packing of birds so as to provide theoretical and method basis for constructing practical significance and sustainable development of Chengdu.The main research contents of this paper include:(1)Study on Chengdu landscape pattern changes from 1995 to 2015 and their driving forces;According to the third phase of satellite remote sensing data from Landsat 8 within twenty years from 1995 to 2015,utilize 3S Technologies,research temporal and spatial change features of Chengdu landscape within these twenty years,calculate the transfer matrix change rule of different landscape type and explore the driving factors of Chengdu landscape pattern changes in twenty years.(2)Study on Chengdu landscape connectivity changes under the background of urbanization;According to the third phase of remote sensing interpretation data of Chengdu city from 1995 to 2015,select representative species,use the cost-distance analysis method and quantitatively research the functional landscape connectivity change features of forest land and water body in Chengdu within twenty years under the background of urbanization.(3)Study on building Chengdu forest-land ecological network.Targeting at protecting birds in forest within the scope of a region,based on multi-standard evaluation,minimum cost path model,nuclear density model and priority principle,build an ecological network planning framework for bird species.For the practical problem of continuously decreased forest landscape connectivity within Chengdu under the background of urbanization,construct a forest ecological network at an ecological security level to protect birds within a region.