Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Karentz, D.
Right arrow Articles by Spero, H. J.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Karentz, D.
Right arrow Articles by Spero, H. J.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

JOURNAL OF PLANKTON RESEARCH | VOLUME 17 | NUMBER 9 | PAGES 1771-1789 | 1995
© Oxford University Press

research-article

Response of a natural Phaeocysris population to ambient fluctuations of UVB radiation caused by Antarctic ozone depletion

Deneb Karentz and Howard J. Spero1

Department of Biology, University of San Francisco San Francisco, CA 94117-1080 USA 1Department of Geology, University of California Davis, CA 95616, USA

Received on October 8, 1994; accepted on May 2, 1995 During the austral spring of 1990, rotation of the Antarctic polar vortex resulted in a 2-fold change in ozone concentrations (170–380 Dobson units) over regions of the marginal ice zone of the Bellingshausen Sea. The changes in ozone caused significant variations in incident and in-water UVB fluences. Phytoplankton cell densities, nutrient concentrations, DNA concentrations and stable carbon isotope ratios ({delta}13C) of particulate organic and dissolved inorganic carbon were monitored for a 5-week period during the ozone fluctuations. Phaeocystis was the dominant phytoplankton taxon and cell numbers were positively correlated to ozone and the {delta}13C of seawater {Sigma}CO2 and negatively correlated to nutrient concentrations. The densities of co-occumng diatoms were not related to changes in ozone, {delta}13C or nutrients. These observations suggest that Phaeocystis sp. responds very rapidly and adversely to increased UVB exposure, and that seawater {delta}13C data may be a useful tool for assessing the physiological state of high-latitude marine communities relative to increased UVB levels.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 Integr. Comp. Biol.Home page
D. Karentz and I. Bosch
Influence of Ozone-Related Increases in Ultraviolet Radiation on Antarctic Marine Organisms
Integr. Comp. Biol., February 1, 2001; 41(1): 3 - 16.
[Abstract] [Full Text] [PDF]

Home page
 Proc. Natl. Acad. Sci. USAHome page
M. C. Rousseaux, C. L. Ballare, C. V. Giordano, A. L. Scopel, A. M. Zima, M. Szwarcberg-Bracchitta, P. S. Searles, M. M. Caldwell, and S. B. Diaz
Ozone depletion and UVB radiation: Impact on plant DNA damage in southern South America
PNAS, December 21, 1999; 96(26): 15310 - 15315.
[Abstract] [Full Text] [PDF]


Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.