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云南省自然保护区的人类足迹压力与空间特征分析
Unveiling Spatial Patterns of Human Footprint Pressure in Nature Reserves of Yunnan Province
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摘要: 整合云南省人口密度、土地利用、交通网络、通航水路及夜间灯光等多源数据,构建90 m分辨率HFP地图,并基于整合优化后的58个国家级和省级自然保护区数据,根据相关标准将其划分为自然景观、湿地、森林、野生动植物和地质遗迹5类;同时结合《云南植被》和森林资源二类调查数据,将全省植被划分为雨林季雨林、阔叶林、针叶林、竹林、灌丛、灌木草丛、高山草甸、经济林和水生植被9类,进而利用空间叠加分析评估不同保护区和植被类型的HFP强度及分布特征。结果表明:全省HFP值范围为0~52,均值为9.37;保护区HFP值范围为0~43,均值为5.48,低于未保护区(9.61),但在既定干扰等级划分下,仍有74.55%的保护区面积处于高干扰区(HFP≥4),且与耕地占比(3.54%)密切相关。不同保护区类型中,地质遗迹保护区HFP均值最高(19.38),野生动植物保护区最低(4.93);不同植被类型中,水生植被的HFP均值最高(8.90),针叶林最低(3.59)。与全球尺度HFP数据集相比,云南省自然保护区整体干扰水平相对较低,但内部高干扰区域比例仍然较大。总体而言,云南省自然保护区在一定程度上降低了人类干扰强度,但生态质量未随面积覆盖水平提升而同步改善。Abstract: Multi-source data from Yunnan Province, including population density, land use, transportation networks, navigable waterways, and nighttime lights, were integrated to generate a 90 m resolution Human Footprint Pressure (HFP) map. Harmonized data for 58 national and provincial nature reserves were compiled, and the reserves were classified into five categories—natural landscape, wetland, forest, wildlife, and geological relics—according to relevant standards. Vegetation across the province was classified into nine types—rainforest and monsoon rainforest, broad-leaved forest, coniferous forest, bamboo forest, shrubland, shrub-grassland, alpine meadow, economic forest, and aquatic vegetation—using The Vegetation of Yunnan and the Forest Management Inventory (FMI) data, and spatial overlay analysis was used to evaluate HFP intensity and distribution characteristics across reserve categories and vegetation types. The results showed that provincial HFP ranged from 0 to 52 with a mean of 9.37, while HFP within nature reserves ranged from 0 to 43 with a mean of 5.48, lower than that in non-protected areas (9.61). However, under the established disturbance grading scheme, 74.55% of the nature reserve area remained in high-pressure zones (HFP ≥ 4), which was closely related to the proportion of cultivated land (3.54%). Among reserve categories, geological relics reserves had the highest mean HFP (19.38) and wildlife reserves had the lowest (4.93). Among vegetation types, aquatic vegetation had the highest mean HFP (8.90) and coniferous forest had the lowest (3.59). Compared with the global-scale HFP dataset, the overall disturbance level within nature reserves in Yunnan was relatively low, but the proportion of highly disturbed areas inside reserves remained large. Overall, nature reserves in Yunnan reduced human disturbance to some extent, but ecological quality did not improve synchronously with increasing area coverage.
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