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首页> 外文学位 >Testate amoebae and diatoms in the Zackenberg area (Northeast Greenland): A study of their assemblages, recent ecology and palaeo-ecology in a High Arctic region.
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Testate amoebae and diatoms in the Zackenberg area (Northeast Greenland): A study of their assemblages, recent ecology and palaeo-ecology in a High Arctic region.

机译：Zackenberg地区（东北格陵兰）的睾丸变形虫和硅藻：对北极高海拔地区它们的组合，近期生态学和古生态的研究。

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摘要

This thesis fits in the long-term monitoring program of Zackenberg (ZERO), which is started up in 1996. The objective of this monitoring program is to provide long-time series of data on the natural oscillations and plasticity of a High Arctic ecosystem.; The thesis deals with two types of organisms: testate amoebae and diatoms. These protists are studied in three major habitat types: soils, terrestrial mosses and aquatic environments. In each habitat type three major points are handled. Firstly the species composition is considered. Secondly the organisation of these taxa in assemblages are studied by means of classification (TWINSPAN) and ordination techniques (PCA, CA, DCA). Further the relation of these assemblages with environmental parameters is treated through ordinations (RDA, CCA) and weighted averages. In a last chapter testate amoebae and diatom composition are analysed in different cores from the Zackenberg region.; In the 3 different habitat types 77 different testate amoebae taxa and 244 diatom taxa are observed. A comparison of the testate amoebae in the different habitats yielded some indicator taxa. Plagiopyxis callida and P. declivis are restricted to the soils. Assulina muscorum and Corythion dubium occur typically in terrestrial mosses. Diflugia globulosa and D. penardi show preferences for aquatic samples. Typical diatom taxa in soil samples and the driest terrestrial mosses are: Diadesmis spp., Hantzschia amphioxys, Navicula atomus, Pinnularia borealis, P. curticostriata and P. obscura. Achnanthes minutissima, A. petersenii, F. pinnata var. pinnata and Tabellaria flocculosa show clear preferences for aquatic samples. Caloneis arctica, Eunotia fallax and Nitzschia perminuta have a high relative abundance in moss samples.; Both the testate amoebae and diatom composition in the oldest sampled core (lower sample dated at 5790 BP) found in the Zackenberg area remarkably changes. The recent ecological information is used to interpret the paleo-environment. The species composition of the samples from the oldest part of the core indicate an aquatic environment at the sampling site. In more recent samples, a zone is noted characterised by testate amoebae and diatom species indicating a vegetation of wet terrestrial mosses. In the most recent samples, taxa able to tolerate extreme dry conditions are dominant.
机译：本论文符合Zackenberg（ZERO）的长期监测计划，该计划始于1996年。该监测计划的目的是提供有关高北极生态系统自然振荡和可塑性的长期数据。 ;本文涉及两种类型的有机体：睾丸变形虫和硅藻。这些生物是在三种主要的栖息地类型中进行研究的：土壤，陆地苔藓和水生环境。在每个栖息地类型中，都要处理三个主要问题。首先考虑物种组成。其次，通过分类（TWINSPAN）和协调技术（PCA，CA，DCA）研究这些分类中的分类组织。此外，这些组合与环境参数的关系通过标准（RDA，CCA）和加权平均值进行处理。在最后一章中，分析了扎肯伯格地区不同岩心中的睾丸变形虫和硅藻组成。在3种不同的生境类型中，观察到77种不同的睾丸变形虫类群和244种硅藻类群。比较不同生境中的睾丸变形虫产生了一些指示性类群。 Palliopyxis callida 和 P。斜体仅限于土壤。 Assulina muscorum 和 Corythion dubium 通常发生在陆地苔藓中。 Diflugia globulosa 和 D。 penardi 显示了对水生样本的偏爱。土壤样品和最干燥的陆地苔藓中典型的硅藻类群是： Diadesmis spp。， Hantzschia amphioxys，Navicula atomus，Pinnularia tubealis，P。curticostriata 和 P。晦涩。 Achnanthes minutissima，A。petersenii，P.pinnata 变种。 pinnata 和 Tabellaria flocculosa 对水生样品表现出明显的偏好。苔藓样品中的 Caloneis arctica，Eutonia fallax 和 Nitzschia perminuta 具有较高的相对丰度。 Zackenberg地区发现的最古老的岩心（下部样品的日期为5790 BP）中的睾丸变形虫和硅藻组成均发生了显着变化。最近的生态信息被用来解释古环境。来自岩心最老部分的样品的物种组成表明采样地点的水生环境。在较新的样品中，注意到一个区域，其特征是睾丸变形虫和硅藻物种，表明地面湿苔藓植物。在最近的样本中，能够耐受极端干燥条件的分类单元占主导地位。

著录项

  • 作者

    Van Kerckvoorde, Andy.;

  • 作者单位

    Universitaire Instelling Antwerpen (Belgium).;

  • 授予单位 Universitaire Instelling Antwerpen (Belgium).;
  • 学科 Biology Ecology.; Biology Limnology.; Paleoecology.; Biology Microbiology.
  • 学位 Dr.
  • 年度 2002
  • 页码 216 p.
  • 总页数 216
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 生态学（生物生态学）;古生物学;微生物学;
  • 关键词

  • 入库时间 2022-08-17 11:46:12

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