Quantitative analysis of freshwater ostracode assemblages in southwestern Yukon Territory, Canada
Quantitative analysis of freshwater ostracode assemblages in southwestern Yukon Territory, Canada
复制标题
DOI：
10.1007/s10750-005-2746-0
复制
发表时间：
2005-08
期刊：
影响因子：
2.6
通讯作者：
J. Bunbury;K. Gajewski
中科院分区：
文献类型：
--
作者：
J. Bunbury;K. Gajewski
研究了育空地区西南部和不列颠哥伦比亚省北部湖泊现代介形类组合与环境变量的关系。从36个湖泊沉积物中共鉴定出8属29种淡水物种，每个湖泊的物种数量在3 ~ 8种之间。在整个研究区域广泛分布的物种包括假丝酵母菌、假丝酵母菌、假丝酵母菌、假丝酵母菌、假丝酵母菌和原生酵母菌。Mg/Ca比值是决定湖泊介形类种类组成的重要因素。当湖水电导率处于中间值时，物种丰富度最大。其中一种明显占主导地位（相对丰度为‰~ ~‰70%）的湖泊，其CaCO3水饱和。Mg/Ca比值、深度和Sr是与该地区物种分布相关性最高的环境因子。
Relations between modern ostracode assemblages and environmental variables from lakes in the southwest Yukon and northern British Columbia were explored. A total of 29 freshwater species representing 8 genera were identified from the sediments of 36 lakes, with the number of species ranging between 3 and 8 per lake. Species widespread throughout the study area includeCyclocypris ampla,Candona candida,Cypria turneri,Cypria ophtalmica, andCandona protzi. The Mg/Ca ratio is an important factor determining the ostracode species composition of a lake. Species richness is at a maximum when the lake water has intermediate values of conductivity. Lakes in which one species clearly dominates the assemblage (‰>‰70% relative abundance) have water saturated with respect to CaCO3. Mg/Ca ratio, depth and Sr are the environmental factors that are most highly correlated with species distributions in this region.