Abstract/Details

The photophysiology of symbiotic dinoflagellates (<i> Symbiodinium</i>) under varying light and thermal conditions and the implications for coral bleaching


2006 2006

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Abstract (summary)

Coral reefs are complex ecosystems full of extraordinary biodiversity. Reef building corals are reliant upon a symbiosis with intracellular dinoflagellates of the genus Symbiodinium. A considerable threat to coral reefs is the breakdown of this symbiosis, known as bleaching. Coral bleaching is characterized by the ghostly white tissue appearance resulting from loss of algal density. Over the past 20 years, there has been an increase in the frequency and magnitude of worldwide bleaching, which is strongly correlated with elevated seawater temperature, and exacerbated by increased irradiance. Bleaching has been linked to photosynthetic stress within the algae.

The capacity for photoacclimation to light at 100 or 600 μmol photons•m -2•s-1 and the subsequent response to thermal stress was examined in four genetically distinct cultures of Symbiodinium (ITS2: A1, A1.1, B1, and F2). Cultures were maintained at the above light levels for at least one month prior to thermal investigation. Temperatures were ramped from the control temperature 26°C up to 32°C over 72hrs, where they remained for up to 10 days. Cultures were then monitored with chlorophyll fluorescence and protein techniques to monitor changes in photosynthesis. (Abstract shortened by UMI.)

Indexing (details)


Subject
Oceanography;
Botany
Classification
0416: Oceanography
0817: Botany
Identifier / keyword
Biological sciences
Title
The photophysiology of symbiotic dinoflagellates (<i> Symbiodinium</i>) under varying light and thermal conditions and the implications for coral bleaching
Author
Robison, Jennifer D.
Number of pages
97
Publication year
2006
Degree date
2006
School code
0060
Source
MAI 44/06M, Masters Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780542720574
Advisor
Warner, Mark E.
University/institution
University of Delaware
University location
United States -- Delaware
Degree
M.S.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
1435812
ProQuest document ID
305323219
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305323219
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