摘要
通过对宁德市东湖湿地公园景观的空间格局进行定量分析结果表明:水库、潮间淤泥海滩和浅海水域是宁德市东湖湿地公园的主要景观类型,其面积约204.870 hm2、170.270 hm2、165.910 hm2,分别占研究区总面积的32.038%、26.627%和25.945%。斑块密度(PD)、破碎度(FN)和分离度(I)所反映的景观类型破碎化程度基本一致,其中潮间盐水沼泽(PD=1.890、FN=1.893和I=3.651)破碎化程度最高,其次是草本沼泽湿地(PD=0.760、FN=0.762和I=4.310),而水库的破碎化程度最低(PD=0.005、FN=0.005和I=0.062)。分维数(D)和平均斑块形状指数(F)结果显示,草本沼泽湿地(D=1.221、F=1.7185)和农用泛洪湿地(D=1.132、F=1.8474)的斑块形状较为复杂,而水产池塘(D=1.026、F=1.3248)的斑块形状最规则,但潮间盐水沼泽(D=1.345、F=1.4395)和水库(D=1.120、F=2.699)分维数的结果与平均斑块形状指标测定值之间存在较大的差异。整体景观多样性指数、均匀度指数、优势度指数及破碎度分别为2.2901、0.7634、0.7100和0.0876,与其他景观类型相比较,闽东湿地公园景观格局布局合理,保护良好。
The Ningde Donghu Wetland Park＇s sight spatial pattern was studied by quantitative analysis.The results showed as follows： the reservoir,intertidal muddy beach and shallow waters were the main landscapes in Donghu Wetland,their dominance accounted for 204.870 hm2,170.270 hm2 and 165.910 hm2（32.038%,26.627%,25.945% of area respectively）.From the results of patch density（PD）,fragmentation（FN） and division degree（I）,the degrees of fragmentation of different sights were similar,it showed that the degree of fragmentation of intertidal salt swamp（PD=1.890,FN=1.893 and I=3.651） was highest,herbaceous swamp（PD=0.760,FN=0.762 and I=4.310） was the second,while that of reservoir（PD=0.005,FN=0.005 and I=0.062）was lowest.In addition,the calculation results of Fractal dimension（D） and mean patch shape index（F） indicated that the herbaceous swamp（D=1.221,F=1.7185）and agricultural flood wetland（D=1.132;F=1.8474） were the most complicated in patch shape,and,while aquatic pond（D=1.026;F=1.3248）was simplest.However,there were relatively obvious differences between the results of Fractal dimension（D） and mean patch shape index（F） of intertidal salt swamp（D=1.345,F=1.4395）and reservoir（D=1.120;F=2.699）.At the whole landscape level,the values of biodiversity（H）,evenness（H＇）,dominance（D） and degree of fragmentation（FN） of Donghu Wetland were 0.2901,0.7634,0.7100 and 0.0876 respectively.After comparisons between the Donghu wetland and other areas were further analyzed,it was concluded that the wetland parks in East Fujian had been well designed and preserved up to now.
出处
《福建林业科技》
2011年第2期56-61,共6页
Journal of Fujian Forestry Science and Technology
基金
宁德市林业局"东湖国家湿地公园前期研究项目"
关键词
湿地景观
镶嵌体特征
斑块特征
生态评价
东湖湿地
wetland sight
mosaic characteristic
patch characteristic
ecological evaluation
Donghu Wetland
