. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 130 A. S. JOHNSON staggered arrays by inserting the narrow end of the stipe through 1-mm holes in the plate and holding the stipes in place by means of soft modeling clay. Every other row of thalli was offset from the one before it so that any given thallus within the canopy was directly downstream of an- other thallus two rows in front of it. The length of the stipes of the thalli within the canopy was always m from the surface of the plate. Results Tluilli reorient in fio\v When exposed to flow, a solitary thallus of
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 130 A. S. JOHNSON staggered arrays by inserting the narrow end of the stipe through 1-mm holes in the plate and holding the stipes in place by means of soft modeling clay. Every other row of thalli was offset from the one before it so that any given thallus within the canopy was directly downstream of an- other thallus two rows in front of it. The length of the stipes of the thalli within the canopy was always m from the surface of the plate. Results Tluilli reorient in fio\v When exposed to flow, a solitary thallus of Chondrus crispits immediately flopped over close to the substratum with the stipe reoriented parallel to flow (Fig. la). A thallus also reoriented when downstream of a single other thallus but bent over less than when solitary at the same ambient flow speed (Fig. lb). In contrast, thalli within the canopies bent over less than did solitary thalli (Fig. 2). Coefficient of drag and E of' soli turn thalli The Cn of eight solitary thalli (measured at m s~'; range = to mean = , SE = ) was independent of thallus size; linear regression analysis: (1) Cn by mass (g): F(l 7l --•• P == (2) C,, by planform area (m2): F(] 7) = P = The E of those eight thalli (range = to , mean = —, SE = ) was independent of thallus size (linear regression analysis: F,, 7) = P = \E by thallus mass]; F, K7) = P = [£ by thallus area]). The magnitude of KE increased with increasing thallus mass (linear regression analysis: F,, 7) = P = , r = ): KE= M1"4. where the units for the coefficient were ka °04 m" (3) ~. G g SOLITARY. 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 Lab
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
