Summary
We examined body size patterns in a colonizing assemblage of marine amphipods and molluscs. We collected animals over a 25 day period from an archipelago of pits that were drilled in brick surfaces. The percent of pits occupied, abundance, species richness, and body size of colonists all increased significantly through time. We compared size ratios of coexisting species with two null models, one that randomized individuals and one that randomized species-populations. For both models, observed overlap ratios usually did not differ from randomness, although species richness was consistently lower than expected for later samples. Results were similar for a subset of the data, a guild of suspension/deposit feeding amphipod species. Some assemblages did show significant deviations from the null models, but the results were spotty and varied among replicates. Overall, the evidence for non-random overlap ratios in body sizes of colonizers was weak.
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References
Barnard JL (1958) Amphipod crustaceans as fouling organisms in Los Angeles-Long Beach harbors with reference to the influence of seawater turbidity. Calif Fish Game 44:161–170
Barnard JL, Reish DJ (1959) Ecology of Amphipoda and Polychaeta of Newport Bay, Calif. Occ Pap Allan Hancock Fdn No 21, pp 106
Barnes RD (1980) Invertebrate Zoology. Saunders College, Holt, Rinehart and Winston
Brown WH, Wilson EO (1956) Character displacement. Syst Zool 5:49–64
Cain EA (1974) Comparative functional morphology of feeding in three species of caprellids (Crustacea: Amphipoda) from the northwestern Florida Gulf Coast. J Exp Mar Biol Ecol 15:81–96
Case TJ, Sidell R (1983) Pattern and chance in the structure of model and natural communities. Evolution 37:832–849
Crawford GS (1937) A review of the amphipod genus Corophium with notes on the British species. J Mar Biol Ass UK 21:589–630
Croker RA (1967) Niche diversity in five sympatric species of intertidal amphipods. Ecol Monogr 37:173–200
Dean TA, Hurd LE (1980) Development in an estuarine fouling community: the influence of early colonists on later arrivals. Oecologia (Berlin) 46:295–301
Diamond JM (1975) Assembly of species communities. In: ML Cody, JM Diamond (eds) Ecology and Evolution of Communities. Harvard Univ Press, Mass, pp 342–444
Fenchel T, Kofoed LH, Lappalainen A (1975) Particle size selection of two deposit feeders: the amphipod Corophium volutator and the prosobranch Hydrobia ulvae. Mar Biol 30:119–128
Grant PR (1972) Convergent and divergent character displacement. Biol J Linn Soc 4:39–68
Holmes SJ (1902) Observations on the habits and natural history of Amphithoe longimana Smith. Biol Bull 2:165–193
Jacsic FM (1981) Abuse and misuse of the term “guild” in ecological studies. Oikos 37:397–400
Moore PG (1978) Turbidity and kelp holdfast amphipoda. I. Wales and S.W. England. J Exp Mar Biol Ecol 32:53–96
Poole RW, Rathcke BJ (1979) Regularity, randomness, and aggregation in flowering phenologies. Science 203:470–471
Schoener TW (1984) Size differences among sympatric, bird-eating hawks: a worldwide survey. In: Strong DR, Simberloff D Jr, Abele LG, Thistle AB (eds) Ecological Communities: Conceptual Issues and the Evidence. Princeton Univ Press, Princeton NJ, pp 254–281
Selvin HC, Stuart A (1966) Data-dredging procedures in survey analysis. Amer Statistician 20:20–23
Simberloff D, Boecklen WJ (1982) Santa Rosalia reconsidered: size ratios and competition. Evolution 35:1206–1228
Skutch AF (1926) On the habits and ecology of the tube-building amphipod Amphithoe rubricata Montagu. Ecology 7:481–502
Slatkin M (1980) Ecological character displacement. Ecology 61:163–178
Sokal RR, Rohlf FJ (1967) Biometry. WH Freeman Co, San Francisco
Strong DR Jr, Szyska LA, Simberloff D (1979) Tests of community-wide character displacement against null hypotheses. Evolution 33:897–913
Zimmerman R, Gibson R, Harrington J (1979) Herbivory and detritivory among gammaridean amphipods from a Florida seagrass community. Mar Biol 54:41–47
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Gotelli, N.J., Lewis, F.G. & Young, C.M. Body-size differences in a colonizing amphipod-mollusc assemblage. Oecologia 72, 104–108 (1987). https://doi.org/10.1007/BF00385052
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DOI: https://doi.org/10.1007/BF00385052