贵州典型坝子土地利用强度空间演变及景观格局响应

发布时间：2018-06-11 14:21

本文选题：坝子 + 土地利用强度　；参考：《应用生态学报》2017年11期

【摘要】：基于坝子(喀斯特山区受人类活动影响最明显的特殊地貌)尺度较小的特征,运用系统网格法,结合半方差变异函数修正模型,分析贵州省境内3种类型共15个坝子2005、2010、2015年土地利用强度的空间演变特征,揭示贵州岩溶山区典型坝子土地利用强度空间演变的一般规律及其与坝子内部景观格局变化的相互关系.结果表明:贵州坝子土地利用强度空间动态演变和景观格局响应模式展现出明显的类型差异.总体上,土地利用强度随坝子经济水平由高到低呈梯度递减.微观演变上,市县中心坝子的土地利用强度围绕坝地中心外围呈同心带状先减后增,空间演变趋势为稳定-扩张型;市县周围坝子的土地利用强度以单一"极-轴"为高强度中心,变化兼具增减,演变趋势为波动型;偏远地区坝子的土地利用强度基本稳定不变,甚至小幅减弱,演变趋势为稳定-衰弱型;坝子景观格局与土地利用强度变化因坝区主导功能差异存在5种不同的响应关系模式.研究期间,3种类型坝子土地利用强度的空间演变受自然和人文因子双重控制,各因子之间相互作用形成其空间演变的典型特征.
[Abstract]:Based on the small scale characteristics of Bazi (the most obvious special geomorphology affected by human activities) in karst mountains, the system grid method is used to modify the model with semi-variance variation function. The spatial evolution characteristics of land use intensity in 2015 were analyzed in 15 types in Guizhou province. This paper reveals the general law of spatial evolution of land use intensity of typical dam in karst mountain area of Guizhou Province and its relationship with the change of landscape pattern inside dam. The results show that the spatial dynamic evolution of land use intensity and the response pattern of landscape pattern in Bazi, Guizhou show obvious differences in types. As a whole, the land use intensity decreases gradually with the economic level of dam. In microcosmic evolution, the land use intensity of central dam of city and county is concentric zonal first and then increased around the center of dam, and the spatial evolution trend is stable and expansionary. The land use intensity of the dam around the city and county is high intensity center with a single "polar axis", the change is both increasing and decreasing, and the evolution trend is fluctuating, and the land use intensity of the dam in the remote area is basically stable or even slightly weakened. The evolution trend is stable-debilitating type and there are five different response models between the landscape pattern and the land use intensity because of the difference of the dominant function in the dam area. During the study period, the spatial evolution of the land use intensity of three types of dam is controlled by both natural and human factors, and the interaction of each factor forms the typical characteristics of spatial evolution.
【作者单位】：贵州师范大学地理与环境科学学院;
【基金】：国家自然科学基金项目(41661020,41261045)资助~~
【分类号】：F301.2;TU986

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