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 85 ka 沉积序列的结果显示，Heinrich 事件期间新热带区极端降温高达 10°C（Hodell 等人，2012 年），并表明约200 ka。建议使用介形虫作为连接三个主要研究主题的模型生物指标。 (1) 过去 200 ka 期间湖泊水位变化的定量评估的目标是扩展现有的介形虫训练集并细化水深和电导率的传递函数。组合将用于重建晚更新世极端气候的超微结构及其对佩滕伊察湖水生生物多样性的影响，以及（3）使用形态学和分子工具通过综合分类学评估作为模式生物的淡水介形类的生物地理学、系统发育学和系统发育为了启动对超过 85 ka 的佩滕伊察湖沉积物的研究工作，为 LacCore 的佩滕伊察科学钻探项目进行了核心取样。明尼苏达大学提议，这也将进一步加强与中美洲的合作，并为未来胡宁湖的 ICDP 钻探做好准备。 （秘鲁）和查尔科湖（墨西哥盆地）的计划工作。

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

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

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