Research on the construction of ecological security pattern in Huanggang Mountain area, the Main Peak of Wuyi Mountain
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摘要:
生态安全格局理论为区域尺度的景观综合体生态保护修复实践提供了理论依据和技术路径。以我国东南地区重要的生态屏障——武夷山主峰黄岗山片区为例,按照识别生态源地—构建阻力面—提取生态廊道的研究框架,采用定性与定量相结合的方法,评估提取区域内生态系统服务功能极重要区,将其与自然保护地叠加生成生态源地;采用地类和地形因子对研究区设置阻力面,运用最小累积阻力模型提取生态廊道,将生态功能重要区确定为生态缓冲区,构建黄岗山片区生态安全格局。结果显示:黄岗山片区生态源地面积为5 808.80 km2,占区域面积的34.16%,占比较大,主要分布在江西省南部、福建省北部山地的交界地带;提取生态廊道共21条,长度为455.1 km,呈组团式将中部与东北部、西南部源地斑块连通起来;生态缓冲区面积为1 574.13 km2,占比为9.2%,主要分布在研究区的北部山区。研究打破省域、市域、流域界限,将研究区视为一个完整的生命共同体,充分考虑生态结构的完整性、生态过程的连通性以及生态功能的重要性,构建区域尺度点线面状的生态安全格局,可为当地实施区域一体化保护和修复提供空间指引。
Abstract:The theory of ecological security pattern provides theoretical basis and technical path for the ecological protection and restoration of landscape complex at regional scale. Taking the important ecological barrier in Southeast China, that is Huanggang Mountain area, the main peak of Wuyi Mountain, as an example, according to the research framework of "Identifying ecological sources - Constructing resistance surfaces - Extracting ecological corridors", a combination of qualitative and quantitative methods was adopted to evaluate and extract the areas with extremely important ecosystem service functions in the region, and superimpose the areas with natural reserves to generate ecological source areas. And the resistance surfaces were set for the study area with land type and terrain factors, then the minimum cumulative resistance model was used to extract the ecological corridors, the important ecological function areas were determined as the ecological buffer zones, and the ecological security pattern of Huanggang Mountain area was constructed. The results showed that the area of ecological sources in Huanggang Mountain area was high at 5 808.8 km2, accounting for 34.16% of the regional land area, which were mainly distributed in the junction zones between the southern mountains in Jiangxi Province and northern mountains in Fujian Province. 21 ecological corridors in total were extracted, with a length of 455.1 km, connecting the central part of the study area with the source patches in the northeast and southwest in a group form. The ecological buffer zones covered an area of 1 574.13 km2, accounting for 9.2%, and mainly distributed in the northern mountainous areas of the region. The study broke the boundaries of provinces, cities and river basins, regarded the study area as a complete community of life, fully considered the integrity of ecological structure, the connectivity of ecological process and the importance of ecological functions, and constructed a regional-scale point-line-plane ecological security pattern, which could provide spatial guidance for the local implementation of regional integrated conservation and restoration.
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表 1 不同阻力因子的阻力赋值
Table 1. Resistance values of different resistance factors
阻力因子 权重 阻力赋值 300 100 50 10 1 土地覆盖类型 0.50 建设用地、未利用地 农田 草地 林地 湿地 地形 高程/m 0.15 <50 50~200 200~500 500~1 000 >1 000 坡度/(°) 0.15 <5 5~10 10~20 20~30 >30 湿地 与湿地距离/m 0.10 >1 500 800~1 500 300~800 <300 湿地内 林地 与林地距离/m 0.10 >1 500 1 000~1 500 500~1 000 <500 林地内 表 2 黄岗山片区生态源地分县(市、区)统计情况
Table 2. Distribution of ecological sources in each county (city, district) in Huanggang Mountain area
县(市、区) 数量/个 面积/km2 面积占比/% 江西省 上饶县 33 1 413.66 25.35 铅山县 21 2 039.82 36.58 广丰县 19 706.81 12.67 福建省 光泽县 14 385.91 6.92 武夷山市 13 631.47 11.32 建阳区 9 168.59 3.02 浦城县 14 230.81 4.14 合计 123 5 577.16 100 -
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