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Summer classification of Southern Hemisphere temperate lakes (Patagonia, Argentina)

机译：南半球温带湖泊的夏季分类（阿根廷巴塔哥尼亚）

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摘要

The purpose of this paper was to synthesize observations of 21 cold temperate lakes from Patagonia, Argentina. To do this, objective limnological variables and the phytoplankton summer structure were analysed using multivariate statistical tools. The results suggest that the most important variables defined a trophic gradient based on nutrients, conductivity and phytoplanktonic attributes. Cluster analysis pointed to three groups of lakes. Steppe lakes (group III) were distinguished from mountain-Andean lakes (groups I and II) through their higher conductivity and ammonia concentration values, higher net phytoplankton density and lower species diversity. The two groups of Andean lakes differed with regard to the biomass of Bacillariophyceae and Prymnesiophyceae, water temperature and dissolved inorganic nitrogen concentration. The influence of the biomass (as biovolume) of each taxonomic group in lakes of different trophic status was examined. Although all Andean lakes appear to be similar, as shown by their similar salt and nutrient concentration values, the phytoplankton biomass split into different taxa and clearly distinguished subgroups. The work presents original information about the phytoplanktonic community structure from all the lakes and the first limnological data on 10 of them, from a region that is poorly known.
机译：本文的目的是对来自阿根廷巴塔哥尼亚的21个温带湖泊进行观测。为此，使用多元统计工具分析了客观的气候学变量和浮游植物的夏季结构。结果表明，最重要的变量基于营养，电导率和浮游植物的属性定义了营养梯度。聚类分析指出了三组湖泊。草原湖泊（第三类）与高山-安第斯山脉湖泊（第一类和第二类）的区别在于其较高的电导率和氨浓度值，较高的净浮游植物密度和较低的物种多样性。两组安第斯湖在细菌科和细菌科的生物量，水温和溶解的无机氮浓度方面有所不同。研究了每个生物分类群在不同营养状态的湖泊中生物量（以生物量计）的影响。尽管所有安第斯湖泊看上去都相似，但盐和养分浓度值相似，但浮游植物的生物量却分成不同的分类单元和明显区分的亚组。这项工作提出了来自所有湖泊的浮游植物群落结构的原始信息，以及来自其中一个鲜为人知的地区中的10个湖泊的第一项湖泊学数据。

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  • 来源
    《Lakes & Reservoirs》 |2000年第4期|213-229|共17页
  • 作者

    MÓnica Diaz; Fernando Pedrozo; Nora Baccala;

  • 作者单位

    Centro Regional Universitario Bariloche Universidad Nacional del Comahue Unidad Postal Universidad del Comahue Quintral 1250 (8400) Bariloche Argentina;

    Centro Regional Universitario Bariloche Universidad Nacional del Comahue Unidad Postal Universidad del Comahue Quintral 1250 (8400) Bariloche Argentina;

    Centro Regional Universitario Bariloche Universidad Nacional del Comahue Unidad Postal Universidad del Comahue Quintral 1250 (8400) Bariloche Argentina;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    lake classification; multivariate analysis; Patagonia; phytoplankton biomass;

    机译：湖泊分类;多元分析;巴塔哥尼亚;浮游植物生物量;

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