Climatic control of plant species richness along elevation gradients in the Longitudinal Range-Gorge Region

在纵的范围峡区域(LRGR ) 在种类丰富探索举起坡度并且评估气候的变量和区域怎么可以解释种类丰富的模式， 5 座山被选择。根据举起，山，种类丰富，区域的价值和气候的变量的维的坡度在每 100 m 地区被计算。在沿着举起坡度的种子工厂种类丰富和气候的变量和区域之间的关系被分析。结果显示出那：(1 ) 种类丰富的 Elevational 模式不是制服并且能被划分在到二种类型。种类丰富的价值在低地是更高的然后与在热带山增加举起 monotonically 减少。种类丰富在副热带的山在举起坡度的更低的一半向高价值与偏爱有单峰的模式。(2 ) 种类密度的模式在沿着举起坡度的种类丰富与那一样。(3 ) 在气候变量之中，实际土壤水分蒸发蒸腾损失总量(AET ) 与种类丰富作为水精力平衡的大小有强壮的关系。在种类丰富的衰落在副热带的山的低地由于更高的温度和更少的降水。

To explore the elevation gradients in species richness in the Longitudinal Range-Gorge Region （LRGR） and evaluate how climatic variables and area may explain the patterns of species richness, 5 mountains are selected. According to the elevation dimensional gradients of the mountains, species richness, the values of area and climatic variables are calculated in each 100 m zone. The relationships between seed plant species richness and climatic variables and area along elevation gradients are analyzed. The re- sults have shown that： （1） ElevaUonal patterns of species richness are not uniform and can be divided in to two types. The values of species richness are higher in the lowlands and then decrease mono- tonically with increasing elevation in the tropical mountains. Species richness has unimodal patterns with a bias towards high values in the lower half of the elevation gradients in the subtropical mountains. （2） The patterns of species density are the same as that in species richness along elevation gradients. （3） Among the climate variables, actual evepotranspiration （AET） as e measurement of water-energy balance has strong relationships with species richness. The decline in species richness is due to the higher temperature and less precipitation in the lowlands of the subtropical mountains.