| Author: | Ji, Jie |
| Title: | Construction of ecological security pattern of Suzhou based on MSPA-MCR model |
| Advisors: | Tan, Tanya (BRE) |
| Degree: | M.Sc. |
| Year: | 2023 |
| Subject: | Urbanization -- Environmental aspects -- China -- Suzhou (Jiangsu Sheng) City planning -- Environmental aspects -- China -- Suzhou (Jiangsu Sheng) Land use -- Environmental aspects -- China -- Suzhou (Jiangsu Sheng) Land use -- Planning -- China -- Suzhou (Jiangsu Sheng) Nature -- Effect of human beings on Human ecology Hong Kong Polytechnic University -- Dissertations |
| Department: | Department of Building Environment and Energy Engineering |
| Pages: | vii, 79 pages : color illustrations, maps |
| Language: | English |
| Abstract: | Urbanization has generated rapid economic and demographic development, but it has also induced many environmental challenges such as pollution, loss of biological habitats and the decline of ecosystem services, thus affecting the sustainability of city development. Ecological security pattern represents a kind of territorial spatial structure that conserve biodiversity and maintain the health of ecosystems, enabling effective control of ecosystems. Suzhou, which is famous for its natural beauty, has been expanding over the past 30 years, leading to problems such as polluted rivers and degraded mountains, and there is an urgent need for systematic restoration and protection of the urban ecosystem. Based on this, this study takes historical land use data, road data, and remote sensing monitoring data as the foundation. Firstly, using landscape pattern indicators and habitat quality calculations, I tried to analyze the ecosystem evolution of Suzhou during the previous 15 years. The results show that Suzhou's habitat quality has been declining, while landscape patches have been fragmented progressively, and the loss of cropland is serious. Then, using the Morphological Spatial Pattern Analysis (MSPA) method, I analysed the current landscape structure of Suzhou and identified 2485.11 km² of land suitable for habitat and migration, as well as discovered that terrestrial organisms are hard to move in the north-south orientation due to the resistance. Based on the "source-sink" paradigm of landscape ecology and the ecological issues resulting from the aforementioned three analyses, 90 patches of high ecological value—a total of 2,556.91 km²—were chosen as ecological source regions from the computation results. The ecological source includes important rivers and lakes, wetlands, mountains, and some woodland patches. Secondly, to simulate the process of material exchange in the ecosystem, I built a resistance surface for biological migration based on the geographic and urban spatial characteristics of Suzhou. Thirdly, according to the Minimum Cumulative Resistance(MCR) model, using historical data and the Linkage Mapper program, I was able to identify 226 ecological corridors totaling 3823.17 km that connected the dispersed biological source locations naturally. I also used this tool to simulate the ecological flow intensity of animal migration in the corridors with reference to the circuit theory, from which further identified 37 ecological pinch points23 and obstacle points. Finally, the ecological security pattern appropriate for Suzhou city's development is constructed, and a spatial protection system with three dimensions "point — line — surface" is created by overlaying ecological sources, corridors, and critical nodes in ArcGIS. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 7746.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 4.29 MB | Adobe PDF | View/Open |
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