[Schwalb] Effects of Abrupt Climate Change on Ice Age Ecosystem of Lake Petén Itzá and on Distribution Patterns of Ostracodes across the Yucatán Peninsula

German Title: Effects of Abrupt Climate Change on Ice Age Ecosystem of Lake Petén Itzá and on Distribution Patterns of Ostracodes across the Yucatán Peninsula

Abbreviation: 316

Current Status: completed


Main Applicant:Prof. Dr. Antje Schwalb


Resources Recipient


Other Persons

Dr. Steffen Kutterolf
Dr. Laura Anahi Macario Gonzalez
Prof. Dr. Miguel Vences


Conveyor Begin: 1 February, 2013
Conveyor End: 31 January, 2017
Conveyor Duration:
Year: 2013


Description

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).

Related Publications

Cohuo, S., Macario-González, L., Wagner, S., Naumann, K., Echeverría-Galindo, P., Pérez, L., Curtis, J., Brenner, M., Schwalb, A. (2020). "Influence of late Quaternary climate on the biogeography of Neotropical aquatic species as reflected by non-marine ostracodes" Biogeosciences p145-161


Cohuo Duran, Sergio, Macario-González, Laura, Pérez, Liseth, Schwalb, Antje (2017). "Overview of Neotropical-Caribbean freshwater ostracode fauna (Crustacea, Ostracoda): identifying areas of endemism and assessing biogeographical affinities" Hydrobiologia 786 p5-21


Kutterolf, S., Schindlbeck, J. C., Anselmetti, F. S., Ariztegui, D., Brenner, M., Curtis, J., Schmid, D., Hodell, D. A., Mueller, A., Pérez, L., Pérez, W., Schwalb, A., Frische, M., Wang, K. L. (2016). "A 400-ka tephrochronological framework for Central America from Lake Petén Itzá (Guatemala) sediments" Quaternary Science Reviews 150 p200-220


Pérez, Liseth (2010). "Non-marine ostracodes from the Yucatán Peninsula as late Quaternary paleoenvironmental indicators" Dissertation