| 摘要: |
| 为了构建科学合理的生态网络结构, 以提升景观连通性, 进而有效促进区域生物多样性保护,
研究以广东省乐昌市为例, 采用 “源地识别-阻力面构建-廊道提取-网络优化” 的研究框架, 结合形态学
空间格局分析、 最小累积阻力模型和景观连通性分析技术, 构建并优化生态网络。 结果显示, 初步构建
的生态网络包含 17 个生态源地和 27 条生态廊道。 通过网络优化, 新增 3 个生态源地和 6 条生态廊道, 设
置 8 个踏脚石, 修复 57 处生态断裂点。 优化后生态网络的 α (网络闭合度)、 β (线点率) 和 γ (网络连
接度) 分别提升了 5. 54%、 3. 90%和 1. 83%, 同时 c (成本比) 降低了 3. 75%, 生态网络连通性和整体效
能得到了改善。 |
| 关键词: 生态网络优化 形态学空间格局分析 最小累积阻力 景观连通性 石漠化区域 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业科技创新项目 (2018CXPT004)。 |
|
| Construction and Optimization of Ecological Networks in Rocky Desertification Regions of South China: A Case Study of Lechang City, Guangdong Province |
|
Wu Bin1, Mao Xupeng2
|
|
1.Guangdong Forestry Survey and Planning Institute;2.Jiangxi Forestry Resources Monitoring Center
|
| Abstract: |
| To construct a scientific and reasonable ecological network structure to improve landscape connectivity and promote regional biodiversity conservation, taking Lechang city, Guangdong province, as an example in this study, the research framework of "source identification-resistance surface construction -corridor
extraction-network optimization" was adopted to construct and optimize the ecological network through the technical means of the morphological spatial pattern analysis (MSPA) method, the minimum cumulative resistance
(MCR) model and the landscape connectivity analysis. The results showed that the initially constructed ecological network contained 17 ecological source sites and 27 ecological corridors. Through the optimization of the
network, 3 new ecological sources and 6 ecological corridors were added, 8 stepping stones were set, and 57
ecological breakpoints were repaired. The α (network closure), β (line point rate) and γ (network connectivity) of the optimized ecological network were improved by 5. 54%, 3. 90% and 1. 83%, respectively, while
c (cost ratio) was reduced by 3. 75%, which resulted in an improvement in ecological network connectivity and overall effectiveness. |
| Key words: ecological network optimization MSPA MCR landscape connectivity rocky desertification regions |
