The simpson indicator was highest on the south , intermediate on the southwest slope and lowest on the north slope . in contrast , shannon - wiener and pilow indicators were just the opposite . the steepness of the slope had no apparent effect on plant diversity in this catchment 不同坡向的植物群落多样性指数差异更明显， simpson指数阳坡>半阳坡>阴坡， shannon一wiener指数和pifow均匀度指数刚好相反，表明群落的物种多样性阴坡高于阳坡;多样性指数在坡度上的差异很小，没有明显的变化趋势。
In the first , an academic concept of the slope spectrum was firstly put forward . the slope spectrum is defined as a statistic graph or a mathematical model with its x - axis denoting the numerical value of the slope factors ( e . g . gradient , aspect or curvature etc . ) and its y - axis the corresponding area on the ground in a specific statistic area 首先，本文提出了地面坡谱的理论概念：地面坡谱是指在一个特定的统计区域内，以某项坡面因子(坡度、坡向或曲率等)的大小为自变量，其对应的地面面积为因变量，构成的统计图表或模型。
Based on the investigation on the structure and niches of secondary forests in jiulongkeng , guangze , fujian province , the distribution law was studied and natural succession tendency was worked out for primary arbors and shrubs in different slope direction , which provides scientific fundamental for artificial stimulating natural regeneration 摘要通过对福建光泽九龙坑不同坡向天然次生林的林分组成和生境的调查，研究主要乔灌木树种在不同坡向林分中的分布规律，分析出不同坡向林分的天然演替趋势，为人工促进天然更新提供科学依据。
It is found that the evapotranspiration had big spatial variability in catchment scale because of the joint - influence of land use , topography , physiognomy , and other factors . the changes of annual evapotranspiration is as the following order : upland > hills > hillslopes > gully slopes . also , the evapotranspiration has obvious vertical distribution characteristic in the slope 在地形上，蒸散量也具有明显的垂直分布规律，随着坡度的增加，蒸散量逐渐减少；阳坡的蒸散量大于阴坡；而在同一坡度和坡向，蒸散量从坡底向坡顶递增。
In this dissertation three topographic factors were included , that is elevation , slope and aspect , among which the effect of slope was the strongest , elevation was the second and aspect was the last . besides topography , burn severity and anthropogenic disturbance were also important to the spatial pattern and the change of the forest landscape 论文所设计的地形因子? ?坡度、坡向和海拔，对景观格局的影响各有侧重，从其对各种不同景观斑块类型转化的影响来看，坡度的影响最强，其次是海拔，影响程度相对较小的是坡向。
