Reconstructing the phytoplankton community of the Cariaco Basin during the Younger Dryas cold event using chlorin steryl esters
MetadataShow full item record
A record of the downcore distribution of chlorin steryl esters (CSEs) through the Younger Dryas was produced from Cariaco Basin sediments in order to assess the potential use of CSEs as recorders of the structure of phytoplankton communities through time. Using an improved high-performance liquid chromatography method for the separation of CSEs, we find significant changes in the distribution of CSEs during the Younger Dryas in the Cariaco Basin. During the Younger Dryas, enhanced upwelling in the Cariaco Basin caused an increase in the diatom population and therefore an increase in the relative abundance of CSEs derived from diatoms. In contrast, the dinoflagellate population, and therefore CSEs derived from dinoflagellates, decreased in response to the climate change during the Younger Dryas. These community shifts agree well with the shifts observed in the present day on a seasonal basis that result from the north-south migration of the Intertropical Convergence Zone over the Cariaco Basin. We also identify changes in the abundance of several CSEs that seem to reflect rapid warming and cooling events. This study suggests that CSEs are useful proxies for reconstructing phytoplankton communities and paleoenvironments.
Author Posting. © American Geophysical Union, 2004. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 19 (2004): PA01006, doi:10.1029/2003PA000907.
Suggested CitationPaleoceanography 19 (2004): PA01006
Showing items related by title, author, creator and subject.
CARIACO time series individual CTD profiles from B/O Hermano Gines HG93_CARIACO in the CARIACO basin from 1995-2017 (CARIACO project) Muller-Karger, Frank; Astor, Yrene; Benitez-Nelson, Claudia; Buck, Kristen N.; Fanning, Kent; Scranton, Mary I.; Taylor, Gordon T.; Thunell, Robert C.; Varela, Ramon; Capelo, Juan; Gutierrez, Javier; Guzman, Laurencia; Lorenzoni, Laura; Montes, Enrique; Rojas, Jaimie; Rondon, Anadiuska; Rueda-Roa, Digna (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: firstname.lastname@example.org, 2019-07-17)This collection of data comprises all the Individual CTD profiles from the Cariaco basin taken as part of the CARIACO Ocean Time-Series Program from November 1995 to January 2017. These include all the CTD profiles taken ...
Time series composite CTD profiles from R/V Hermano Ginés cruises in the Cariaco Basin from 1995 through 2017 (CARIACO Ocean Time-Series Program) Muller-Karger, Frank; Astor, Yrene; Benitez-Nelson, Claudia; Scranton, Mary I.; Taylor, Gordon T.; Thunell, Robert C.; Varela, Ramon; Capelo, Juan; Guzman, Laurencia; Lorenzoni, Laura; Montes, Enrique; Rojas, Jaimie; Rueda-Roa, Digna (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: email@example.com, 2019-06-06)The CARIACO Ocean Time-Series Program (formerly known as CArbon Retention In A Colored Ocean) started on November 1995 (CAR-001) and ended on January 2017 (CAR-232). Monthly cruises were conducted to the CARIACO station ...
Biogeochemistry and microbiology from the R/V Hermano Gines cruises in the Cariaco Basin from 1995 to 2015 (CARIACO Ocean Time-Series Program) Scranton, Mary I.; Taylor, Gordon T.; Muller-Karger, Frank; Astor, Yrene; Varela, Ramon; Fanning, Kent; Buck, Kristen N.; Rojas, Jaimie (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: firstname.lastname@example.org, 2019-06-07)Biogeochemistry and microbiology measurements in the Cariaco Basin. Microbiology sampling were conducted during special CARIACO cruises (distinct from the monthly, core sampling, time-series cruises) from November 1995 to ...