| 摘要: |
| 借助遥感和GIS 技术, 通过景观格局指数的计算, 来分析围垦对东台海岸带景观格局的影响。研究发现, 1995～2006 年间, 围垦区海岸带景观破碎化程度减弱, 斑块形状的多样性和复杂性程度降低,景观格局态势朝单一化方向发展, 景观异质性在整体上有减弱的趋势。然而, 在空间上景观格局的变化又有异于整体。主要表现为: 农业区破碎化程度减弱, 斑块形状简单化, 景观格局朝均衡化分布; 笆斗区破碎化程度加剧, 斑块形状复杂化, 优势斑块碱篷被耕地替代; 三仓区破碎化程度加剧, 斑块形状趋于复杂, 由滩地、碱篷为主的景观格局演变成滩地、耕地、碱篷比重势均的格局。总之, 围垦区内自然景观的破碎度增强, 各斑块类型的形状日渐复杂, 景观空间结构趋于复杂化。 |
| 关键词: 围垦 海岸滩涂 景观格局 景观指数 |
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| 基金项目:国家自然科学基金项目(40401059); 江苏省“青蓝工程”资助 |
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| Impact of coast beach reclamation on Dongtai coastal landscape pattern |
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| Abstract: |
| Remote sensing and GIS technology were used for analyzing the impact of reclamation on Dongtai coastal landscape pattern by calculating landscape pattern indexes. It was found that coastal landscape fragmentation decreased, the diversity and complexity of patch shape reduced, the distribution of landscape pattern trended to be simple, and the whole heterogeneity of landscape in study area had a weakening trend during the period of 1995 to 2006. However, the changes in landscape pattern were different from the whole in spatial view. In agriculture study area, the degree of landscape fragmentation reduced, patch shape became simplistic, landscape pattern evenly distributed; in Badou study area, the degree of landscape fragmentation increased, patch shape became complicated, the dominant path alkali canopy had been replaced by farmland; in Sancang area, landscape fragmentation increased, path shape became more complicated, the beaches, alkali canopy dominated landscape pattern evolved into beaches, farmland and alkali canopy evenly distributed pattern. In a word, the fragmentation of natural landscape enhanced in the reclamation areas, the shape of various types of patches became complex, and the landscape spatial structure trend to more complicated. |
| Key words: reclamation coast beach landscape pattern pattern index |
