Full
Outline
This study focuses on the Chang-Zhu-Tanurban agglomeration as the research area. It integrates the analytical strengths of Morphological Spatial Pattern Analysis (MSPA) in landscape spatial structure with the quantitative assessment capabilities of the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) model for ecosystem service functions to analyze the evolution of the urban agglomeration's ecological network, which holds significant value for safeguarding regional ecological security. Firstly, based on time-series data from three periods (2000, 2010, and 2020), ecological sources within the Chang-Zhu-Tan urban agglomeration were identified. This involved calculating the levels of four key ecosystem service functions-water yield, carbonstorage, soil retention, and habitat quality-and combining these results with MSPA. Subsequently, ecological corridors were extracted using circuit theory to construct the regional ecological network of the Chang-Zhu-Tan urban agglomeration, and its spatiotemporal evolution characteristics were analyzed. The results indicate that:Ecological sources exhibited a continuous expansion trend in scale from 2000 to 2020, with their coverage area increasing from 5855.53km2 to 5898.43km2. Their spatial distribution density displayed significant heterogeneity, characterized by "high aggregation in the eastern and southern regions and low density in the central region". The number of ecological corridors decreased from 119 in 2000 to 114 in 2020. The total corridor length initially increased from 1604.16km to 1689.22km, then fluctuated and decreased to 1573.28km. Spatially, the corridors exhibited a pattern of "sparser in the center and denser on the periphery". Ecological pinch points (critical areas) and barrier restoration areas were highly concentrated spatially near the corridors. Among these, the number of ecological pinch points showed a trend of initial increase followed by decrease, while ecological barrier points exhibited a continuous expansion trend.
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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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