English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

OF THE THESIS DETERMINING THE PHYSIOLOGICAL RESPONSE OF A SUBTROPICAL SEAGRASS, THALASSIA TESTUDINUM, TO SALINITY STRESS USING PULSE AMPLITUDE MODULATED (PAM) FLUOROMETRY by Dorothy A. Byron Florida International University, 2006 Miami, Florida Professor James W. Fourqurean, Major Professor I investigated how photosynthetic performance of Thalassia testudinum changed along a naturally occurring salinity gradient in Florida Bay, and to laboratory controlled hyper and hypo-osmotic stress. I found significant differences between sites in Florida Bay for yield ratios (Y and F,/Fm); however, this difference does not seem to be based on the salinity regime, since sites with the greatest salinity range were not significantly different from the site with the lowest salinity range. Laboratory results showed declines in the minimum and maximum fluorescence values after a gradual ramping-up of salinity and after long-term exposure to a sustained drop in salinity, but these declines were not seen with the Y and Fv/Fm ratios. Caution should be used when drawing conclusions about physiological stress from results obtained by PAM fluorometry, as acclimation may play a large role in the fluorescence response, limiting the use of this technique.

Determining the physiological response of a subtropical seagrass, Thalassia testudinum, to salinity stress using pulse amplitude modulated (PAM) fluorometry