Abstract
Translocation experiments were used to test the effect of habitat on growth and shape of three contrasting phenotypes of Bembicium vittatum: dwarf, highly domed snails from an usually dry tidal pond; large, moderately domed snails from a sheltered, regularly inundated pond; and relatively flat snails from a vertical, exposed shore. Snails from both ponds grew nearly twice as fast in the wet pond as in the dry pond, indicating a high degree of plasticity of growth. Associated with these changes in growth rates was convergence of shape. Under conditions of rapid growth, the dwarf snails became relatively flatter, and hence more similar to the native snails at that site. These results indicate that the dwarf phenotype is largely a plastic stunting in response to conditions of little submersion time. The snails from the exposed shore also grew faster in the sheltered, wet pond than at their native site. However, they not only retained their flat shape, but actually became flatter (and hence divergent from the pond snails) when grown in the pond. Thus, variation in shell shape was due to interactions between source population and a common plastic association of flatter growth profile with more rapid growth. Previous experiments had demonstrated high heritability of the flat phenotype, while the present results show that the expression of the genetically different types is affected substantially by the conditions of growth, and that phenotypic differences among populations may either overestimate or underestimate the underlying genetic differences. This unpredictability of the relationship between variation in shell form and its underlying genetic basis complicates interpretations of geographical variation or palaeontological sequences based on shell form.
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Bervan, K. A., D. E. Gill & S. J. Smith-Gill, 1979. Countergradient selection in the green frog, Rana clamitans. Evolution 33: 609–623.
Black, R. & M. S. Johnson, 1997. Tidal ponds: unusual habitats characteristic of the Houtman Abrolhos Islands. In F. E. Wells (ed.),The fauna and flora of the Houtman Abrolhos Islands, Western Australian Museum, Perth: 47–61.
Boulding, E. G., J. Buckland-Nicks & K. L. Van Alstyne, 1993. Morphological and allozyme variation in Littorina sitkana and related Littorina species from the northeastern Pacific. Veliger 36: 43–68.
Boulding, E. G. & T. K. Hay, 1993. Quantitative genetics of shell form of an intertidal snail: constraints on a short-term response to selection. Evolution 47: 576–592.
Conover, D. O. & E. T. Schultz, 1995. Phenotypic similarity and the evolutionary significance of countergradient variation. TREE 10: 248–252.
Creese, R. G. & A. J. Underwood, 1982. Analysis of inter-and intraspecific competition amongs intertidal limpets with different methods of feeding. Oecologia 53: 337–346.
Crothers, J. H., 1980. Further observations on the growth of the common dog-whelk, Nucella lapillus (L.), in the laboratory. J. moll. Stud. 46: 181–185.
Fletcher, W. J., 1984. Intraspecific variation in the population dynamics and growth of the limpet Cellana tramoserica. Oecologia 63: 110–121.
Gibbs, P. E., 1993. Phenotypic changes in the progeny of Nucella lapillus (Gastropoda) transplanted from an exposed shore to sheltered inlets. J. moll. Stud. 59: 187–194.
Janson, K., 1982. Genetic and environmental effects on the growth rate of Littorina saxatilis. Mar. Biol. 69: 73–78.
Johannesson, B. & K. Johannesson, 1996. Population differences in behaviour and morphology in Littorina saxatilis: Phenotypic plasticity or genetic differentiation? J. Zool. Lond. 240: 475– 493.
Johnson, M. S. & R. Black, 1991. Genetic subdivision of the intertidal snail Bembicium vittatum (Gastropoda: Littorinidae) varies with habitat in the Houtman Abrolhos Islands,Western Australia. Heredity 67: 205–213.
Johnson, M. S. & R. Black, 1996. Geographic cohesiveness versus associations with habitat: genetic subdivision of Bembicium vittatum Philippi (Gastropoda: Littorinidae) in the Houtman Abrolhos Islands. Biol. J. linn. Soc. 58: 57–74.
Kemp, P. & M. D. Bertness, 1984. Snail shape and growth rates: evidence for plastic shell allometry in Littorina littorea. Proc. natn. Acad. Sci. U.S.A. 81: 811–813.
Levins, R., 1968. Evolution in Changing Environments. Princeton University Press, Princeton, 120 pp.
McMahon, R. F., 1992. Microgeographic variation in the shell morphometrics of Nodilittorina unifasciata from southwestern Australia in relation to wave exposure of shore. In J. Grahame, P. J. Mill & D. G. Reid (eds), Proceedings of the Third International Symposium on Littorinid Biology, The Malacological Society of London, London: 107–117.
Newkirk, G. F. & R. W. Doyle, 1975. Genetic analysis of shellshape variation in Littorina saxatilis on an environmental cline. Mar. Biol. 30: 227–237.
Palmer, A. R., 1985. Quantum changes in gastropod shell morphology need not reflect speciation. Evolution 39: 699–705.
Parsons, K. E., 1996. The genetic effects of larval dispersal depend on spatial scale and habitat characteristics. Mar. Biol. 126: 403– 414.
Parsons, K. E., 1997a. Role of dispersal ablility in the phenotypic differentiation and plasticity of two marine gastropods. 1. Shape. Oecologia 110: 461–471.
Parsons, K. E., 1997b. Contrasting patterns of heritable geographic variation in shell morphology and growth potential in the marine gastropod Bembicium vittatum: evidence from field experiments. Evolution 51: 784–796.
Phillips, B. F., N. A. Campbell & B. R. Wilson, 1973. A multivariate study of geographic variation in the whelk Dicathais. J. exp. mar. Biol. Ecol. 11: 27–69.
Reid, D. G., 1988. The genera Bembicium and Risellopsis (Gastropoda: Littorinidae) in Australia and New Zealand. Rec. Aust. Mus. 40: 91–150.
Reid, D. G., 1996. Systematics and evolution of Littorina. The Ray Society, London. 463 pp.
Trussell, G. C., 1996. Phenotypic plasticity in an intertidal snail: the role of a common crab predator. Evolution 50: 448–454.
Vermeij, G. J., 1980. Gastropod shell growth rate, allometry, and adult size: environmental implications. In D. C. Rhoads & R. A. Lutz (eds), Skeletal Growth in Aquatic Organisms. Plenum Press, NewYork: 379–391.
Yamada, S., 1987. Geographic variation in the growth rates of Littorina littorea and L. saxatilis. Mar. Biol. 96: 529–534.
Yamada, S., 1989. Are direct developers more locally adapted than planktonic developers? Mar. Biol. 103: 403–411.
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Johnson, M.S., Black, R. Effects of habitat on growth and shape of contrasting phenotypes of Bembicium vittatum Philippi in the Houtman Abrolhos Islands, Western Australia. Hydrobiologia 378, 95–103 (1998). https://doi.org/10.1023/A:1003241722328
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DOI: https://doi.org/10.1023/A:1003241722328