LARGE-SCALE BIOGEOGRAPHICAL PATTERNS OF SPECIES RICHNESS OF TREES
LARGE-SCALE BIOGEOGRAPHICAL PATTERNS OF SPECIES RICHNESS OF TREES
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DOI：
10.1038/329326a0
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发表时间：
1987-09-24
期刊：
影响因子：
64.8
通讯作者：
PAQUIN, V
中科院分区：
文献类型：
--
作者：
CURRIE, DJ;PAQUIN, V
生物学家早就认识到物种丰富度的惊人地理变异性。当代生态学的一个主要目标是确定造成这种变异的因素。我们研究了北美树木的空间分布，以确定哪些环境特征与不同地区的物种丰富度关系最密切。实现的年蒸散量，这是与初级生产力，因此是可用能量的措施，统计解释物种丰富度的变化的76%。地形和接近海洋的显着相关的残差变化，而季节性气候变化和冰川历史没有。根据这些北美模式，可以准确地预测英国和爱尔兰的树木丰富度。我们的数据是最好的解释的假设，当代可用的能源限制物种丰富度3，4。
Biologists have long recognized the striking geographical variability of species richness1. A primary goal of contemporary ecology is to identify the factors responsible for this variability2. We have examined the spatial distributions of trees in North America to determine which characteristics of the environment are most closely related to the species richness of different regions. Realized annual evapotranspiration, which is correlated with primary production and is therefore a measure of available energy, statistically explains 76% of the variation in species richness. Topography and proximity to the sea are significantly related to the residual variation, whereas seasonal climatic variability and glacial history are not. Tree richness in Great Britain and Ireland can be accurately predicted from these North American patterns. Our data are best explained by the hypothesis that contemporary available energy limits species richness3,4.