Comparison of Species Richness for Stream-Inhabiting Insects in Tropical and Mid-Latitude Streams
Comparison of Species Richness for Stream-Inhabiting Insects in Tropical and Mid-Latitude Streams
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热带与中纬度河流溪流昆虫物种丰富度比较
DOI：
10.1086/282996
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发表时间：
1975
影响因子：
2.9
通讯作者：
J. Vandermeer
中科院分区：
文献类型：
--
作者：
J. Stout;J. Vandermeer
热带和中纬度的物种丰富度之间的统计平滑的物种样本曲线的基础上，从7个中纬度和9个热带流样本的嗜流昆虫的定量比较。实际数据的形式积累的物种数量相比，从浅滩网站的岩石数量的应用到一个数学模型，以估计物种的数量，应该存在于一个给定的区域。物种-样本曲线表明，在理论样本量为100块岩石的热带溪流中，嗜流昆虫的物种丰富度显著高于中纬度溪流。这种趋势在取样20或25块岩石之前并不明显。结果向我们表明，早期研究表明两个纬度地区之间的物种丰富度没有差异是基于不充分的采样。海拔趋势存在于低地和中海拔热带地区之间。季节性差异也观察到的热带流采样在两个位置，无论是在雨季和旱季。它出现从操纵的参数的理论模型，根据数据，在一般中纬度流包含更多的区域控制的rheophile物种，这些物种的影响，能够迅速利用资源，暂时排除一些当地控制的物种。
A quantitative comparison based on statistically smooth species-sample curves between tropical and mid-latitude species richness for rheophile insects from seven mid-latitude and nine tropical stream samples is presented. Actual data in the form of accumulated numbers of species compared with numbers of rocks taken from riffle sites are applied to a mathematical model in order to estimate numbers of species that should be present in a given area. Species-sample curves show that species richness of rheophile insects is significantly higher at a theoretical sample size of 100 rocks for tropical streams than it is for mid-latitude streams. This trend is not obvious until 20 or 25 rocks have been sampled. The results suggest to us that earlier studies indicating no differences in species richness between the two latitudinal regimes were based on inadequate sampling. Altitudinal trends exist between lowland and mid-elevation tropical sites. Seasonal differences were also observed for a tropical stream sampled at two locations, both in the wet and the dry season. It appears from manipulation of the parameters of the theoretical model, based on the data, that in general mid-latitude streams contain more regionally controlled rheophile species and that those species have the effect of being able to rapidly exploit the resources to the temporary exclusion of some locally controlled species.