mean patch area

The patch numbers and patch density increased while the mean patch area decreased during the researching period .

研究期间，景观斑块数与景观斑块密度增加，而平均斑块面积减少。

The result shows that with the time passing , the patch numbers of different landscape types increased sharply and every mean patch area decreased .

结果表明：随着时间的推移，各景观类型的斑块数目明显增多，平均斑块面积减少；

We mainly use the patch area , mean patch area , porosity , density of the four parameters of the landscape metrics method to study .

景观指数法中主要应用了斑块总面积、斑块平均面积、孔隙度、斑块密度这4个参数来进行研究。

The landscape index of mean patch area , diversity index , dominance and patch density was selected to study the relationship among the landscape pattern and slope and aspect .

选取平均斑块面积、多样性指数、优势度、斑块密度四个景观指数，研究景观格局与坡度、坡向之间的相互关系。

Indices including mean patch area , landscape dominance , mean slope , mean altitude , and fragmentation degree were selected and synthetically analyzed , with the ecological landscape planning made by DEM model .

选取平均斑块面积、景观优势度、平均坡度、平均海拔和破碎度因子对其进行综合分析，并借助DEM模型进行景观生态规划。

In the 12 years between 1988 and 2000 , the landscape fragmentation increased for both the mean patch area and the perimeter of cropland , woodland , grassland and unused land decreased .

12年期间，景观破碎度增加，表现在耕地、林地、草地、未利用地斑块的平均面积、周长都在减小。

From the hyper-arid deserts to steppe deserts , plant community diversity , plaque richness and mean patch area are decreased . Plant distribution is more smaller , and also species richness is , when the the climate is more drought . 3 .

由草原化荒漠到极旱荒漠，植物群落多样性逐渐降低，越干旱的情况下，植物分布越呈密集的小片状分布，物种丰富度也降低。

The weight mean fractal dimension of patch area was from 1 to 1.35 , and the bondage form of all patch types was quite regular .

面积加权平均斑块分维数介于1～1.35之间；