. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Dll I I SIM Hot \l)\m I U I KS l\ ( K\I S 459 110 CO O DIFFUSIVE BOUNDARY LAYER. 0 1 2 3 LU no g B 100 O on DIFFUSIVE BOUNDARY LAYER 1 - I/" o 90 z 80 ft 70 _ / -^ 1 " O 50 40 30 20 10 / . j / I I 1 1 1 ( ) 1 2 3 A DISTANCE FROM TISSUE (mm) Kiyure 3. Oxygen concentrations perpendicular to the oral disk opening of the corals Favia tavus (A) and Siyloplwra pislil/alu (B) in calm water (continuous lines) and uith a 5-cm/s current (dashed lines). Means ± SD: n: A-calm = 4, A-current = 3.
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Dll I I SIM Hot \l)\m I U I KS l\ ( K\I S 459 110 CO O DIFFUSIVE BOUNDARY LAYER. 0 1 2 3 LU no g B 100 O on DIFFUSIVE BOUNDARY LAYER 1 - I/" o 90 z 80 ft 70 _ / -^ 1 " O 50 40 30 20 10 / . j / I I 1 1 1 ( ) 1 2 3 A DISTANCE FROM TISSUE (mm) Kiyure 3. Oxygen concentrations perpendicular to the oral disk opening of the corals Favia tavus (A) and Siyloplwra pislil/alu (B) in calm water (continuous lines) and uith a 5-cm/s current (dashed lines). Means ± SD: n: A-calm = 4, A-current = 3. B-calm = 5. B-current = 7. and from mm to mm in .S. pislillata. Although the 5-cm/s current reduced the thickness of the DBL, it remained laminar and the iso-oxic profiles in the boundary layers remained continuous. Measurements made in a hole drilled into the coral skel- eton of an F. fiiviis coral showed that, in the dark, hypoxia (13% air saturation) extended throughout the entire depth of the hole, and a denned DBL was present outside it. When corals were shifted from light to darkness, oxygen concentrations within the diffusive boundary layer changed from supersaturation to anoxia within less than 1 min. From the initial slope of the decline in oxygen concentration, we calculated the oxygen residence time (the time needed for consumption of the excess oxygen, reducing the concentration from its level in the light to its level in the surrounding seawater. in the dark) to be s (Fig. 4). Discussion Like other sessile organisms, corals create a distinct mi- crohabitat considerably different from the water sur-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lilli
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
