Summary
The distribution and diversity of Danish freshwater snails is discussed in the light of MacArthur and Wilson's theory of island biogeography. Species-area curves for 86 eutrophic and oligotrophic ponds and lakes are made and the variance to mean ratios of species numbers in lakes of identical sizes calculated. These data indicate that the snail fauna represents a dynamic equilibrium sustained by immigration and extinction. Different properties of small and large bodies of water are discussed with regard to probability of immigration and extinction. Oligotrophic lakes show a steeper species-area curve than eutrophic ones. This is explained by a higher extinction probability in the former but the total species pool is the same for both types of lakes.
The freshwater snails are described as a group largely consisting of fugitive species. Physicochemical factors set the ultimative physiological limits to a species but within the main area of distribution biotic interrelations may be of main importance in governing the diversity of local faunas. These considerations probably have a general application to the hololimnic fauna.
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References
Calow, P.: Studies on the natural diet of Lymnaea pereger obtusa (Kobelt) and its possible ecological implications. Proc. Malac. Soc. Lond. 39, 203–215 (1970)
Diamond, J. M.: Avifaunal equilibria and species turnover rates on the Channel Islands of California. Proc. nat. Acad. Sci. (Wash.) 64, 57–63 (1969)
Frömming, E.: Biologie der Mitteleuropäischen Süßwasser-Schnecken. Berlin: Duncker und Humboldt 1956
Harman, W. N.: Replacement of pleurocerids by Bithynia in polluted waters of central New York. Nautilus 81, 77–83 (1968)
Harman, W. N., Berg, C. O.: The freshwater snails of central New York with illustrated keys to the genera and species, vol. 1 (4), p. 1–68. Search: Cornell Univ. Agr. Exp. Sta. Entomol. Ithaca 1971
Horn, H. S.: MacArthur, R. H.: Competition among fugitive species in a Harlequin environment. Ecology 53, 749–752 (1972)
Hubendick, B.: Die Verbreitungsverhältnisse der Limnischen Gastropoden in Südschweden. Zool. Bidr. Uppsala 24, 419–559 (1947)
Hubendick, B.: The effectiveness of passive dispersal in Hydrobia jenkinsi. Zool. Bidr. Uppsala 28, 493–504 (1950)
Hutchinson, G. E.: Copepodology for the ornithologist. Ecology 32, 571–577 (1951)
Jensen, C. F.: Topografisk oversigt over indvande i Thy. Zootopografiske undersøgelser i Thy 1. Flora og Fauna 64, 121–163 (1958)
Jobin, W. R., Ferguson Palmer, F. F.: Control of Schistosomiasis in Guayama and Arroyo, Puerto Rico. Bull. Wld Hlth Org. 42, 151–156 (1970)
Johansen, A. C.: Bidrag til vore ferskvandsmolluskers biologi. Vidensk. Medd. Nat. Hist. Foren. 51 (1899)
Lassen, H. H.: Snegle (Gastropoda) fra indvande i Thy. Zootopografiske undersøgelser i Thy 13. Flora og Fauna 77, 65–76 (1971)
Levins, R., Culver, D.: Regional coexistence of species and competition between rare species. Proc. nat. Acad. Sci. (Wash.) 68, 1246–1248 (1971)
Macan, T. T.: Ecology of freshwater mollusca in the English Lake District. J. Anim. Ecol. 19, 124–146 (1950)
MacArthur, R. H.: Some generalized theorems of natural selection. Proc. nat. Acad. Sci. (Wash.) 48, 1893–1897 (1962)
MacArthur, R. H., Wilson, E. O.: The theory of island biogeography. Princeton: Univ. Press 1967
Simberloff, D. S., Wilson, E. O.: Experimental zoogeography of islands. The colonization of empty islands. Ecology 50, 278–297 (1969)
Slatkin, M.: Competition and regional coexistence. Ecology 55, 128–134 (1974)
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Lassen, H.H. The diversity of freshwater snails in view of the equilibrium theory of island biogeography. Oecologia 19, 1–8 (1975). https://doi.org/10.1007/BF00377585
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DOI: https://doi.org/10.1007/BF00377585