自然科学版学报

在复杂人类活动干扰下，山地城市景观格局变化强烈，影响生态风险水平。为揭示山地城市景观生态风险与人类活动强度之间的空间关系，选择贵阳市作为典型山地城市代表，基于2000年、2010年和2020年的遥感影像和社会经济数据，通过构建景观生态风险模型和人类活动强度指数，对贵阳市景观生态风险和人类活动强度的空间关系进行研究。结果表明：2000—2020年间，贵阳市景观生态风险呈下降趋势，人类活动强度呈增加趋势，低坡度带的景观生态风险水平变化量明显高于其他坡度带的，但各坡度带的人类活动强度变化差异相对较小；中南部地区的景观生态风险和人类活动强度的变化特征明显有别于北部、西部和东部地区的；景观生态风险与人类活动强度整体上表现出负相关关系，在不同坡度带存在明显异质性；控制坡地人类活动强度、加大生态治理工程实施力度、提高土地节约集约利用水平是今后山地城市景观管理和人类活动调控的主要方向。该研究成果可为山地城市景观管理、人类活动调控提供参考。

Under the interference of complex human activities, the change of landscape pattern of mountainous cities strongly affects the level of ecological risk. In order to reveal the spatial correlation between landscape ecological risk and human activity intensity in mountainous cities, Guiyang City was selected as a typical mountainous city, based on the remote sensing images and social economic data in 2000, 2010 and 2020, the landscape ecological risk models and human activity intensity index were established, the spatial relation of landscape ecological risk and human activity intensity and their correlation were explored. The results showed that: from 2000 to 2020, the landscape ecological risk in Guiyang showed a downward trend, while the intensity of human activities showed an increasing trend, the variation amount of the landscape ecological risk in low-slope gradient was significantly higher than that in the other slope gradients, whereas the variation of the intensity of human activities in each slope gradient was relatively small. And the changes of landscape ecological risk and human activity intensity in the southern and central region were significantly different from those in the northern, western and eastern regions, there was a negative correlation between landscape ecological risk and human activity intensity, whereas there was obvious heterogeneity in different slope gradients. Controlling the human activities intensity of sloping land, increasing the implementation of ecological management projects, and improving the level of integrative and saving land use are the main directions of landscape management and human activities regulation in mountainous city in the future. This study can provide a reference for mountainous urban landscape management and human activities regulation.