. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 244 A. H, ALTIERI. Sterilized rock/moving water Sterilized rock/standing water Polystyrene/moving water Polystyrene/standing water s °-8 J5 "S c g §. E (j Figure 2 As detected by the chi-square analysis, cumulative larval settlement in the sterilized rock-moving water treatment shows a marked departure from the other three treatments by day two of the experiment. This relationship persisted for the remainder of the 8-day experiment, though larvae continued to settle through the end of the experiment. Values at t
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 244 A. H, ALTIERI. Sterilized rock/moving water Sterilized rock/standing water Polystyrene/moving water Polystyrene/standing water s °-8 J5 "S c g §. E (j Figure 2 As detected by the chi-square analysis, cumulative larval settlement in the sterilized rock-moving water treatment shows a marked departure from the other three treatments by day two of the experiment. This relationship persisted for the remainder of the 8-day experiment, though larvae continued to settle through the end of the experiment. Values at the 2-day mark used for statistical analysis (indicated by the vertical dashed line) were thus an accurate descriptor of longer-term behavioral trends. in a pattern analogous to diffusion at a rate of — 10 cm • d The results of this study indicate that as larvae move ran- domly about an area that is heterogeneous with respect to substrate and water movement, they are more likely to settle and accumulate in areas where specific conditions are present. Thus, the patchy distribution of B. clc^ims that has been quantified in several studies may be due to preferential settlement in areas of higher water movement and rugose substrate. Such selectivity for water movement and topog- raphy leads to patchy distribution in other sessile marine invertebrates, including barnacles (33). ascidians (34). bryo- zoans. hydroids, and polychaetes (35). The crawl-away larvae of Bnlniinp/nllui i'let>(ins are ex- tremely sensitive to environmental conditions, and they base their settlement behavior on factors including water movement and substrate. This suggests that the environment is variable enough at the scale of dispersal (centimeters) to have generated an adaptive advantage for selective larvae, just as in more widely dispersing species. Though the rel- ative importance of water movement and substrate as set- tlement cues remains to be tested in the held for B. elcgcm*. these two factor
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
