Journal ArticleDOI
Primary productivity of reef-building calcareous red algae
James A. Marsh,James A. Marsh +1 more
TLDR
Calculated productivity of various calcareous algal zones indicates that these do not contribute significantly to overall reef production on atolls of the northern Marshall Islands, and island reefs are less productive than previously studied inter—island reefs.Abstract:
Primary productivity of reef—building algae was studied by putting samples from the reef in a closed system and measuring oxygen exchange in the light and in the dark Gross productivity determined for 32 samples in full sunlight had a mean value of 0048 mg O2 cm—2 hr—1 Photosynthesis was found to increase with the logarithm of light intensity up to 1,000 ft—c and was constant between 1,000 and 8,000 ft—c Rates of gas exchange in flowing water showed no correlation with water velocity but were greater than rates in still water Daily patterns of photosynthesis were calculated for populations of calcareous algae living on the submarine faces of the windward sides of atolls During most of the daylight hours light is probably not a limiting factor for photosynthesis in these populations Calculated productivity of various calcareous algal zones indicates that these do not contribute significantly to overall reef production on atolls of the northern Marshall Islands Island reefs are less productive than previously studied inter—island reefsread more
Citations
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Journal ArticleDOI
Shifting roles of heterotrophy and autotrophy in coral energetics under varying turbidity.
TL;DR: This study is the first to show heterotrophic plasticity in a symbiotic coral, and to show that such plasticity can offset stress from high particle loads, and demonstrates that changes in the trophic mode of some coral species are a mechanism for sustaining a positive energy balance in turbid environments, thereby broadening their physiological niche.
Journal ArticleDOI
Oxidative stress causes coral bleaching during exposure to elevated temperatures
TL;DR: Observations confirm a role for oxidative stress, whether caused by elevated temperatures or exposure to UV radiation, in the bleaching phenomenon and exposure of corals to exogenous antioxidants that scavenge reactive oxygen species during temperature-induced stress improves maximum photosynthetic capacity.
Journal ArticleDOI
The Effect of Sudden Changes in Temperature, Light and Salinity On the Population-Density and Export of Zooxanthellae From the Reef Corals Stylophora-Pistillata Esper and Seriatopora-Hystrix Dana
TL;DR: Results from this study explore the conditions that induce bleaching in two species of reef coral-zooxanthellae associations from Lizard Island, Great Barrier Reef, Australia and suggest that closer inspection of the underlying reasons for the pale color of bleached corals is warranted.
Journal ArticleDOI
The Ecology of Coralline Algal Crusts: Convergent Patterns and Adaptative Strategies
TL;DR: The study of such convergent morphological and anatomical properties of corallines provides insight into interpreting the adaptive value of some characters or the "strategies" of some of these plants.
References
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Journal ArticleDOI
Primary Production in Flowing Waters1
TL;DR: The ratio of total primary production to total community respiration is used to classify communities quantitatively according to their predominantly heterotrophic or autotrophic characteristics, and for diverse types of communities.
Journal ArticleDOI
Trophic Structure and Productivity of a Windward Coral Reef Community on Eniwetok Atoll
Howard T. Odum,Eugene P. Odum +1 more
Journal ArticleDOI
Photo-electric Measurements of Submarine Illumination throughout the Year
TL;DR: In this paper, the penetration of daylight into sea-water in the English Channel was measured using one vacuum and two gas-filled potassium photo-electric cells below water and the conclusions put forward tentatively in 1928 were substantiated in the main, although the vacuum photometer, which is relatively more sensitive to the blue end of the spectrum, generally indicated rather higher opacities.
Journal ArticleDOI
Adjustment of Bikini Atoll to ocean waves
Walter Munk,Martson C. Sargent +1 more
TL;DR: Bikini Atoll as mentioned in this paper is a natural breakwater, consisting of long narrow grooves in the seaward face of the reef, and surge channels on the reef flat, tuned to the prevailing wave periods.
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