. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 146 J .1 BELL AND D. K. A. BARNES. Figure 1. Sites where sponge rock and cliff assemblages were sampled in Lough Hyne Marine Nature Reserve. extends to about 18 m, and current flow rates decrease with depth, falling to 100 cm s~' at 18 m (Fig. 2). Some data were taken from the literature (Bell and Barnes, 2000a) to enable greater comparison between sponge assemblages from different habitats within Lough Hyne. These data, which were included in the analysis, concerned sponge assemblages inhabiting vertical and inclined surfac
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 146 J .1 BELL AND D. K. A. BARNES. Figure 1. Sites where sponge rock and cliff assemblages were sampled in Lough Hyne Marine Nature Reserve. extends to about 18 m, and current flow rates decrease with depth, falling to 100 cm s~' at 18 m (Fig. 2). Some data were taken from the literature (Bell and Barnes, 2000a) to enable greater comparison between sponge assemblages from different habitats within Lough Hyne. These data, which were included in the analysis, concerned sponge assemblages inhabiting vertical and inclined surfaces on sublittoral cliffs at Labhra Cliff, West Cliff, Whirlpool Cliff. and Bullock Island (an adjacent Atlantic coastal site with a turbulent flow regime). The tidal range within Lough Hyne is about m. Sampling and observation methods The artificial substrata (panels) used were square ma- chined slate panels (15 x 15 cm), prepared and assembled as for Turner and Todd (1994). They were used to investi- gate an ear!> pioneer stage in community succession. A blue square (10 cm K 10 cm) was drawn in the center of each panel with a permanent blue marker pen. Panels were placed in running water iVr 24 h and then dried; this process was repeated twice more prior to deployment. The blue back- ground makes it easier to identify recruits that are small or translucent. Three panels (forming one panel array) were attached by cable ties to welded steel bars. The panel array was positioned with the blue surfaces facing down (to simulate the undersides of a boulder). Bolts at the corner of each steel frame allowed the panels to be adjusted so they were 20 mm above the substratum. Panel arrays were de- ployed at depths of 0 m. 6 m, and 12 m at Labhra Cliff and Whirlpool Cliff. The first panels were deployed at the start of October 1997 and were replaced bimonthly until March 2001. Before panels were replaced, they were cleaned using a razor blade. Each panel was examined under a binocul
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
