Bündelantrag: "Scientific Collaboration On Past Speciation Conditions in Ohrid (SCOPSCO)": Recent and fossil Ostracodes from Lake Ohrid as indicators of past environments: A coupled ecological and molecular genetic approach with deep-time perspective

捆绑申请:“奥赫里德过去物种形成条件的科学合作(SCOPSCO)”:奥赫里德湖的最新介形虫和化石介形虫作为过去环境的指标:具有深度时间视角的耦合生态和分子遗传学方法

基本信息

项目摘要

Ancient Lake Ohrid is characterized by a high degree in endemism and an unresolved geological history. Ostracodes are preserved in satisfactory abundances in at least two interglacial sediment sequences and thus provide a unique record to test the aquatic ecosystem response to environmental change. Our initial analyses yield a minimum of 62 ostracode species of which at least 19 are endemic. Because knowledge of ecological dependences is insufficient to interpret fossil assemblages from long sediment cores, and taxonomy is difficult, we propose to (1) perform autecological and taxonomic analyses of recent ostracodes and environmental parameters characterizing their habitats, to (2) unravel the response of the lake system and ostracode assemblages during the Eemian and the Holocene using sediment core CO1202 covering the past approx. 136 ka, and to (3) determine the degree of extinction due to anthropogenic pressure using short sediment cores from one polluted and one pristine site. Recent ostracodes will also be used to (4) establish phylogeny and date speciation events using genetic techniques. This will allow to verify ostracode taxonomy and degree of diversity as well as speciation ages provided by other organisms analyzed by our cooperation partners Wilke and Albrecht (WI 1902/8). The coupling of taxonomic and autecological analyses with genetic techniques and results from fossil assemblages will be used to narrow down age and cause of speciation events, and origin of Lake Ohrid.
古代奥赫里德湖的特点是高度的地方特有性和未解决的地质历史。介形类在至少两个间冰期沉积序列中保存得非常丰富,为检验水生生态系统对环境变化的响应提供了独特的记录。我们的初步分析产生至少62介形虫物种,其中至少有19个是地方性的。由于生态依赖性的知识不足以解释化石组合从长的沉积物芯,分类是困难的,我们建议(1)进行个体学和分类学的分析,最近介形类和环境参数表征他们的栖息地,(2)解开湖泊系统和介形类组合的响应,在Eemian和全新世使用沉积物芯CO 1202覆盖过去约。136 ka,(3)确定灭绝程度由于人为压力使用短沉积物芯从一个污染和一个原始站点。最近的介形类也将被用于(4)利用遗传技术建立物种发生和物种形成事件的日期。这将允许验证介形虫分类和多样性程度以及由我们的合作伙伴Wilke和Albrecht(WI 1902/8)分析的其他生物提供的物种形成年龄。分类学和autecological分析与遗传技术和化石组合的结果的耦合将用于缩小年龄和物种形成事件的原因,以及奥赫里德湖的起源。

项目成果

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Professorin Dr. Antje Schwalb其他文献

Professorin Dr. Antje Schwalb的其他文献

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{{ truncateString('Professorin Dr. Antje Schwalb', 18)}}的其他基金

Climate and Environmental Variability during the late Middle Pleistocene at the Paleolithic Sites of Schöningen, Northern Germany
德国北部舍宁根旧石器时代遗址中更新世晚期的气候和环境变化
  • 批准号:
    350769604
  • 财政年份:
    2017
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Effects of Abrupt Climate Change on Ice Age Ecosystem of Lake Petén Itzá and on Distribution Patterns of Ostracodes across the Yucatán Peninsula
气候突变对佩滕伊察湖冰期生态系统和尤卡坦半岛介形类分布模式的影响
  • 批准号:
    235297191
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
Lake system response of Nam Co area, central Tibet, to Late Quaternary Monsoon dynamics: Microfossils as recorders of environmental change
西藏中部纳木错地区湖泊系统对晚第四纪季风动力学的响应:微化石作为环境变化的记录者
  • 批准号:
    14456666
  • 财政年份:
    2005
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Paleoclimate and paleoecology of the northern lowland Neotropics, Phase I and II: Limnological survey of modern aquatic environments and paleoclimate reconstructions from fossil species assemblages recovered by the Lago Petén Itzá Scientific Drilling Proj
北部低地新热带区的古气候和古生态学,第一阶段和第二阶段:现代水生环境的湖泊学调查和根据佩滕伊察湖科学钻探项目回收的化石物种组合重建古气候
  • 批准号:
    5448462
  • 财政年份:
    2005
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes

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