不同地理环境下山地森林景观空间格局演化分析

介绍了研究区域2014年秋季平均最高温度、平均最低温度、平均降水量图、地势等一般情况,通过景观格局指数进行山地森林景观空间格局演化分析。随着年平均温度的逐渐增加,山地森林景观空间格局破碎度FN也逐渐增加,而SHEI逐渐降低,优势度指数DO、Shannon多样性指数SHDI无规律性变化。随着研究区域降水量的逐渐降低,景观优势度指数DO也逐渐降低,景观均匀度指数SHDI逐渐升高,其他两种景观空间格局指数无规律性变化。研究区域景观均匀度SHEI和景观多样性SHDI随日照时长的增加而增加,在一定程度上和日照时长呈正相关,景观优势度DO随日照时长的增加而降低,在一定程度上和日照时长呈负相关,景观破碎度和日照时长无明显的相关关系。气温升高能够导致山地森林被分离程度越来越大,使得山地森林景观整体破碎化程度增加。当气温升高时,斑块分布均匀性降低,多样性减少。随着降水量的逐渐降低,降水量对研究区域山地森林景观的控制力逐渐降低,但斑块类型逐渐增加,不同类型斑块在景观中的分布更加均匀。随着日照时长的逐渐减少,斑块分布均匀性降低、多样性减少,日照时长对研究区域山地森林景观的控制力逐渐降低,斑块类型逐渐减少,不同类型斑块在景观中的分布均匀性降低。

The mountain forest landscape spatial pattern evolution under different geographical environment analysis

Objective: to analyse the mountain forest landscape spatial pattern evolution under different geographical environment.Methods: this paper introduces the research area in the fall of 2014 the average maximum temperature, average minimum temperature, average rainfall, topography, etc. Generally, through the landscape pattern index analysis of mountain forest landscape spatial pattern of evolution.Results: with the increase of annual mean temperature and the landscape spatial pattern of the mountain forest fragmentation FN also increase gradually, but SHEI gradually reduce, dominance index DO no change regularity, Shannon diversity index.As the study area precipitation gradually reduce, landscape dominance index DO also gradually reduced, landscape evenness index SHDI gradually increases, the other two index of landscape spatial pattern of the irregular change.The study area landscape evenness SHEI and increases with the increase of landscape diversity SHDI with the sunshine when, in a certain extent and sunshine duration were positively correlated, landscape dominance DO decreased with increasing when the sunshine long, to a certain extent, and negatively correlated with the sunshine duration, landscape fragmentation and sunshine duration has no obvious correlation.Conclusion: rising temperatures could lead to mountain forest was separation degree is more and more big, make the whole mountain forest landscape fragmentation degree increase.When temperatures rise, plaque distribution uniformity, diversity decreased.With precipitation gradually reduce, the precipitation of the study area of mountain forest landscape control gradually decreased, but the patch types increase gradually, different types of patches in the landscape distribution more uniform.As the sun as long gradually reduce, reduced plaque distribution uniformity and diversity, the sunshine duration of the study area of mountain forest landscape control reduce gradually, gradually reduce plaque type, different types of patches in the landscape distribution uniformity.