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
• 负责人: Professorin Dr. Antje Schwalb
• 金额: --
• 依托单位: Institut für Geosysteme und Bioindikation
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/235297191?language=en
• 关键词: Effects; Abrupt; Climate; Change; Ice

Results from a 85 ka old sediment sequence from Lake Petén Itzá, Gutemala, show extreme cooling of the Neotropics of up to 10°C during Heinrich Events (Hodell et al., 2012) and suggest high climate sensitivity for the older sediment sections of about 200 ka. It is proposed to analyze the consequences of abrupt climate change on the stability of aquatic ecosystems over time and consequently the historical biogeography of the Peninsula Yucatán by using ostracodes as model bioindicators interlinking three major research topics. A (1) quantitative assessment of lake level changes during the past 200 ka is targeted by expanding an existing trainingset of recent ostracodes and refining transfer functions for water depth and conductivity. (2) Fossil ostracode assemblages will be used to reconstruct the ultrastructure of Late Pleistocene climate extremes and their effects on aquatic diversity of Lake Petén Itzá, and (3) to assess biogeography, phylogeography and phylogeny of freshwater ostracodes as model organisms by integrative taxonomy using morphology and molecular tools. In order to initiate research efforts on Lake Petén Itzá sediments extending beyond 85 ka a core sampling party for the Petén Itzá Scientific Drilling Project at LacCore, University of Minnesota, is proposed. This will also further strengthen the collaboration with Central America and prepare for future ICDP-drilling in Lake Junin (Peru) and planned work on Lake Chalco (Mexico Basin).

古特马拉Petén Itzá湖85ka古老沉积物序列的结果表明，在Heinrich事件期间，东热带地区温度高达10°C(Hodell等人，2012年)，这表明对于约200ka的古老沉积物区段来说，气候敏感性很高。建议使用介形虫作为连接三个主要研究主题的生物模型指标，分析气候突变对水生生态系统稳定性的影响，从而分析尤卡坦半岛的历史生物地理。(1)对过去200ka期间湖泊水位变化的定量评估的目标是扩大现有的新近介形类训练集，并改进水深和电导率的传递函数。(2)利用介形虫化石组合重建晚更新世气候极端事件的超微结构及其对Petén Itzá湖水生生物多样性的影响；(3)利用形态和分子工具对淡水介形虫作为模式生物的生物地理、系统地理和系统发育进行综合分类评价。为了启动对超过85ka的Petén Itz湖沉积物的研究工作，提议为明尼苏达大学LacCore的Petén Itzá科学钻探项目举办一个岩心取样组。这也将进一步加强与中美洲的合作，并为今后国际地球科学中心在朱宁湖(秘鲁)的钻探和计划在查尔科湖(墨西哥盆地)开展的工作做准备。

项目成果

A 400-ka tephrochronological framework for Central America from Lake Petén Itzá (Guatemala) sediments

来自佩滕伊察湖（危地马拉）沉积物的中美洲 400ka 年代学框架

• DOI: 10.1016/j.quascirev.2016.08.023
• 发表时间: 2016
• 期刊: Quaternary Science Reviews
• 影响因子: 4
• 作者: Kutterolf;Schindlbeck;Anselmetti;Ariztegui;Brenner;Curtis;Schmid;Hodell;Mueller;Pérez;Schwalb;Frische
• 通讯作者: Frische

Ecology of Cladocera species from Central America based on subfossil assemblages

• DOI: 10.4081/aiol.2016.6266
• 发表时间: 2016-12
• 期刊: Advances in Oceanography and Limnology
• 作者: M. Wojewódka;E. Zawisza;Sergio Cohuo;L. Macario-González;A. Schwalb;Izabela Zawiska;L. Pérez

Overview of Neotropical-Caribbean freshwater ostracode fauna (Crustacea, Ostracoda): identifying areas of endemism and assessing biogeographical affinities

• DOI: 10.1007/s10750-016-2747-1
• 发表时间: 2017-02-01
• 期刊: HYDROBIOLOGIA
• 影响因子: 2.6
• 作者: Cohuo, Sergio;Macario-Gonzalez, Laura;Schwalb, Antje
• 通讯作者: Schwalb, Antje