西部林业科学
西部林業科學
서부임업과학
JOURNAL OF WEST CHINA FORESTRY SCIENCE
2015年
2期
107-111
,共5页
林地%空间格局%大理州
林地%空間格跼%大理州
임지%공간격국%대리주
forest land%landscape pattern%Dali prefecture
以大理州森林资源二类调查数据为本底,在GIS技术支持下,针对景观内部组成结构和外部整体特征2种研究尺度,利用相关的景观类型指标(斑块数量、边缘密度、最大斑块指数等)和景观水平指标(景观多样性、分割度、蔓延度等)对研究区土地利用空间格局进行定量分析。结果表明,纯林是整个研究区生态系统中的优势组分,内部斑块大、聚集度高、在人为干扰下呈现一定的破碎状态。全州景观空间格局整体表现为斑块数量多、景观类型破碎化程度高且分布不均匀、对蔓延事件不敏感等特征。受地形、经济发展速度以及开发强度等因素的影响,破碎程度最大的是洱源县,最小的是云龙县。
以大理州森林資源二類調查數據為本底,在GIS技術支持下,針對景觀內部組成結構和外部整體特徵2種研究呎度,利用相關的景觀類型指標(斑塊數量、邊緣密度、最大斑塊指數等)和景觀水平指標(景觀多樣性、分割度、蔓延度等)對研究區土地利用空間格跼進行定量分析。結果錶明,純林是整箇研究區生態繫統中的優勢組分,內部斑塊大、聚集度高、在人為榦擾下呈現一定的破碎狀態。全州景觀空間格跼整體錶現為斑塊數量多、景觀類型破碎化程度高且分佈不均勻、對蔓延事件不敏感等特徵。受地形、經濟髮展速度以及開髮彊度等因素的影響,破碎程度最大的是洱源縣,最小的是雲龍縣。
이대리주삼림자원이류조사수거위본저,재GIS기술지지하,침대경관내부조성결구화외부정체특정2충연구척도,이용상관적경관류형지표(반괴수량、변연밀도、최대반괴지수등)화경관수평지표(경관다양성、분할도、만연도등)대연구구토지이용공간격국진행정량분석。결과표명,순림시정개연구구생태계통중적우세조분,내부반괴대、취집도고、재인위간우하정현일정적파쇄상태。전주경관공간격국정체표현위반괴수량다、경관류형파쇄화정도고차분포불균균、대만연사건불민감등특정。수지형、경제발전속도이급개발강도등인소적영향,파쇄정도최대적시이원현,최소적시운룡현。
Based on the survey data of forest resource , and GIS technology , by focusing the internal structure and external landscape overall characteristics as two research scales , the landscape class index ( such as number of pat-ches, edge density, largest patch index, etc.) and landscape index (such as landscape diversity, segmentation, contagion, etc.) were studied to quantitatively analyze landscape spatial patterns of Dali prefecture .The results showed that pure forest was the dominate group of ecological system in the study area , with large patches , high ag-gregation and high fragmentation under human disturbance .Landscape spatial pattern in Dali prefecture showed large number of patches , high fragmentation with uniform distribution , and less sensitive to spread events .Ow-ning to economic development speed and land topography , high fragmentation happened in Eryuan county and low fragmentation in Yunlong county .