群落净生产力 meaning in Chinese

net community productivity

The density with the biodiversity increasing shows " m " model . ( 3 ) the correlation analysis shows : elevation , slope , development stage and biomass are main factors which affect the biodiversity pattern in the research region . the biodiversity of the quercus aliena var . acutesrata community shows the patterns with the elevation and slope affecting : on sunny slope , the species diversity increases with the elevation increasing below the attitude of 1640m and its climax is at this attitude ( the diversity index h = 1 . 68 ) , upward this point , the diversity index descends slowly . the evenness shows ascend trend with the elevation upward , its climax point at 1800m ( the evenness index jsw = 0 . 78 ) , then descending after this point
( 5 )通过分析，锐齿栋群落生物量与生物多样性呈现如下关系:在海拔1500一170枷范围内，锐齿栋群落生物量与物种多样性之间呈单峰曲线关系;在海拔1700一1900m范围内，生物量与物种多样性之间呈不明显的波动关系;在海拔1900一2100m范围内，生物量随物种多样性的增加而增大，通过对不同高程内生物量与物种多样性分析发现，随着海拔的上升，最大生物量对应的物种多样性略有增加趋势;在相同海拔和坡向条件下，生物量与物种多样性之间也呈典型的单峰曲线关系;群落净生产力与物种多样性之间总体上也呈单峰曲线关系。