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Title: Photosynthethic carbon reduction by seagrasses exposed to ultraviolet b radiation. Final technical report

Abstract

The species of seagrasses were selected on the basis of their dominance in the marine system, contribution to total productivity, and importance to the life histories of organisms in the Indian River lagoon system along the central Florida east coast. The three seagrasses were Halophilia engelmannii, Halodule wrightii, and Syringodium filiforme. These seagrasses form an excellent experimental system as their areas of dominance fall more or less along a natural gradient of UV-B and photosynthetically active radiation (PAR) penetration. The sensitivity of photosynthesis in the seagrasses was determined and their photosynthetic response to levels of UV-B simulating atmospheric ozone depletion was monitored. Further experiments explore the possible attenuation or repair of UV-B induced photosynthetic inhibition by PAR, the role of epiphytic growth upon seagrasses as a protective UV-B shield, and the inhibition of photosynthesis in response to UV-A is studied.

Publication Date:
Research Org.:
Florida Inst. of Tech., Melbourne (USA). School of Science and Engineering
OSTI Identifier:
5637073
Alternate Identifier(s):
OSTI ID: 5637073
Report Number(s):
N-79-21742
DOE Contract Number:  
NAS9-15516
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; GRASS; PHOTOSYNTHESIS; ULTRAVIOLET RADIATION; ENVIRONMENTAL EFFECTS; BIOLOGICAL EFFECTS; CARBON; IRRADIATION; RADIATION EFFECTS; CHEMICAL REACTIONS; ELECTROMAGNETIC RADIATION; ELEMENTS; NONMETALS; PHOTOCHEMICAL REACTIONS; PLANTS; RADIATIONS; SYNTHESIS 560400* -- Other Environmental Pollutant Effects

Citation Formats

Not Available. Photosynthethic carbon reduction by seagrasses exposed to ultraviolet b radiation. Final technical report. United States: N. p., 1979. Web.
Not Available. Photosynthethic carbon reduction by seagrasses exposed to ultraviolet b radiation. Final technical report. United States.
Not Available. Thu . "Photosynthethic carbon reduction by seagrasses exposed to ultraviolet b radiation. Final technical report". United States.
@article{osti_5637073,
title = {Photosynthethic carbon reduction by seagrasses exposed to ultraviolet b radiation. Final technical report},
author = {Not Available},
abstractNote = {The species of seagrasses were selected on the basis of their dominance in the marine system, contribution to total productivity, and importance to the life histories of organisms in the Indian River lagoon system along the central Florida east coast. The three seagrasses were Halophilia engelmannii, Halodule wrightii, and Syringodium filiforme. These seagrasses form an excellent experimental system as their areas of dominance fall more or less along a natural gradient of UV-B and photosynthetically active radiation (PAR) penetration. The sensitivity of photosynthesis in the seagrasses was determined and their photosynthetic response to levels of UV-B simulating atmospheric ozone depletion was monitored. Further experiments explore the possible attenuation or repair of UV-B induced photosynthetic inhibition by PAR, the role of epiphytic growth upon seagrasses as a protective UV-B shield, and the inhibition of photosynthesis in response to UV-A is studied.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 15 00:00:00 EST 1979},
month = {Thu Mar 15 00:00:00 EST 1979}
}

Technical Report:
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