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Outline
This study takes the Huaihe River Basin as the research area, integrates ecosystem service assessment, biodiversity analysis, and landscape connectivity analysis, and identifies ecological sources by combining nature reserves. Eight key resistance factors were selected, including landscape ecological risk, MSPA (Morphological Spatial Pattern Analysis) landscape types, vegetation coverage, topographic relief, land use types, night-time light index, distance to rivers, and distance to roads. A comprehensive resistance surface was constructed using the entropy weight method. Based on circuit theory, ecological corridors were built and their grades were determined. Furthermore, key areas for ecological restoration were identified by recognizing ecological pinch points and barrier points. The results showed that a total of 24 ecological sources were identified in the Huaihe River Basin, with a total area of 23,590.30km2, mainly distributed in cities such as Lu'an and Xinyang. There were 41 ecological corridors, among which 19 were key ecological corridors. A total of 781 ecological pinch points and 142 ecological barrier points were identified. The main land use types of ecological pinch points were cultivated land, water areas, and forest land. Xuzhou City had the largest area of ecological pinch points, while Chuzhou City had the largest number of ecological pinch points. The total area of ecological pinch points requiring priority protection and restoration was 405.76km2, and the total area of ecological barrier points was 948.99km2. The Huaihe River Basin presents a spatial pattern of "three cores, four belts, and multiple points". Guided by the principle of prioritizing natural ecology and supplementing with artificial measures, this study proposes scientific protection and restoration strategies for key areas of different land types, aiming to enhance the integrity and connectivity of the ecosystem in the Huaihe River Basin. The findings provide a scientific basis and practical guidance for ecological protection and restoration in the Huaihe River Basin and other river basins.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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