Abstract
Habitat variability is largely an external mechanism influencing community variability by affecting abundances and precipitating other community changes but the nature of this influence is poorly understood. The absence of systematic quantitative studies appears to be a major reason for this deficiency. To address the problem, we have evaluated community and population variability in invertebrate communities collected from 49 coastal Jamaican rock pools with contrasting levels of habitat variability.
We calculated a multivariate index of habitat variability based on temporal changes in physicochemical variables. Variability in diversity indices (Simpson’s and Shannon-Wiener), evenness (2 measures), and species richness represented community variability while species rank correlations and community constancy represented changes in community structure. Additionally, we analyzed the impact of three habitat generalists (harpacticoid copepod (Nitocra spinipes Boeck), cyclopoid copepod (Orthocyclops modestus Herrick), and the ostracod (Potamocypris sp.)) on overall community variability. As habitat variability increased, both community and population variability increased. Community structure (ranked abundances) was more variable in variable habitats compared to non-variable habitats but communities in these variable habitats retained greater constancy of composition suggesting that highly variable habitats are dominated by a few species with good dispersal abilities. Rare species may come and go, but the dominant species persist in these habitats.
Habitat generalists influenced temporal community variability differently, especially evenness (based on the Shannon-Wiener index). Positive relationships were found between the variability in evenness and population variability of the ostracod and cyclopoid copepod. A negative relationship was found between the variability in evenness and the variability of harpacticoid copepods.
Our study suggests that individual communities or assemblages respond independently and asynchronously to environmental factors, a view originally proposed by Gleason (1917). We conclude that the form of community structure in variable habitats remains constant. The species composition and relative abundances can change over time but the relative abundance of the dominant species stays high and the remaining species, regardless of their numbers, make relatively small contributions to the overall community variability pattern.
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References
Brown, J.H., D.W. Mehlman and G.C. Stevens. 1995. Spatial variation in abundance. Ecology 76: 2028–2043.
Connell, J.H. 1978. Diversity in tropical rain forests and coral reefs. Science 199: 1302–1310.
Connell, J.H. and W.P. Sousa. 1983. On the evidence needed to judge ecological stability or persistence. Am. Nat. 121: 789–824.
Corkum, L.D. 1989. Patterns of benthic invertebrate assemblages in rivers of northwestern North America. Freshwat. Biol. 21: 191–205.
Death, R.G. 1995. Spatial patterns in benthic invertebrate community structure: products of habitat stability or are they habitat specific? Freshwat. Biol. 33: 455–467.
Death, R.G. and M.J. Winterbourn. 1994. Environmental stability and community persistence: amultivariate perspective. J. North. Am. Benthol. Soc. 13: 125–139.
Gaston, K.J. and B.H. McArdle. 1994. The temporal variability of animal abundances: measures, methods and patterns. Phil. Trans. R. Soc. London, Ser. B 345: 335–358.
Gleason, H. 1917. The structure and development of plant association. Bull. Torrey Bot. Club 44: 463–481.
Grossman, G.D., P.B. Moyle and J.O. Whitaker Jr. 1982. Stochasticity in structural and functional characteristics of an Indiana stream fish assemblage: a test of community theory. Am. Nat. 120: 423–454.
Hanski, I. and M.E. Gilpin. 1997. Metapopulation Biology: Ecology, Genetics, and Evolution. Academic Press, San Diego.
Magurran, A.E. 1988. Ecological Diversity and its Measurement. Princeton University Press, Princeton, N.J.
May, R.M. 1973. Stability and Complexity in Model Ecosystems. Princeton University Press, Princeton, N.J.
McAuliffe, J.R. 1984. Competition for space, disturbance, and the structure of a benthic stream community. Ecology 65: 894–908.
McNaughton, S.J. 1977. Diversity and stability of ecological communities: a comment on the role of empiricism in ecology. Am. Nat. 111: 515–525.
Meffe, G.K. 1984. Effects of abiotic disturbance on coexistence of predator-prey fish species. Ecology 65: 1525–1534.
Micheli, F., K.L. Cottingham, J. Bascompte, O.N. Bjřrnstad, G.L. Eckert, J.M. Fischer, T.H. Keitt, B.E. Kendall, J.L. Klug and J.A. Rusak. 1999. The dual nature of community variability. Oikos 85: 161–169.
Pickett, S.T.A. and P.S. White. 1985. The Ecology of Natural Disturbance and Patch Dynamics. Academic Press, San Diego.
Pimm, S.L. 1991. Balance of Nature? Ecological Issues in the Conservation of Species and Communities. The University of Chicago Press, Chicago.
Quintana-Ascencio, P.F. and M. Morales-Hernández. 1997. Fire-mediated effects of shrubs, lichens and herbs on the demography of Hypericum cumulicola in patchy Florida scrub. Oecologia 112: 263–271.
Rahel, F.J. 1990. The hierarchical nature of community persistence: a problem of scale. Am. Nat. 136: 328–344.
Reynolds, C.S., J. Padisák and U. Sommer. 1993. Intermediate disturbance in the ecology of phytoplankton and the maintenance of species diversity: asynthesis. Hydrobiologia 249: 183–188.
Reynolds, C.S. 1995. The intermediate disturbance hypothesis and its applicability to planktonic communities: comments on the views of Padisák and Wilson. New Zealand J. Ecol. 19: 219–225.
Ross, S.T., W.J. Matthews and A.A. Echelle. 1985. Persistence of stream fish assemblages: effects of environmental change. Am. Nat. 126: 24–40.
Rykiel, E.J. 1985. Towards a definition of ecological disturbance. Aust. J. Zool. 10: 157–161.
Sale, P.F. and J.A. Guy. 1992. Persistence of community structure: what happens when you change taxonomic scale? Coral Reefs 11: 147–154.
Sankaran, M. and S.J. McNaughton. 1999. Determinants of biodiversity regulate compositional stability of communities. Nature 401: 691–693.
Scarsbrook, M.R. and C.R. Townsend. 1993. Stream community structure in relation to spatial and temporal variation: a habitat templet study of two contrasting New Zealand streams. Freshwat. Biol. 29: 395–410.
Therriault, T.W. and J. Kolasa. 1999a. Physical determinants of richness, diversity, evenness and abundance in natural microcosms. Hydrobiologia 412: 123–130.
Therriault, T.W. and J. Kolasa. 1999b. New species and records of microturbellarians from coastal rock pools of Jamaica, West Indies. Arch. Hydrobiol. 144: 371–381.
Tilman, D. 1996. Biodiversity: population versus ecosystem stability. Ecology 77: 350–363.
Townsend, C.R. A.G. Hildrew, and J. Francis. 1983. Community structure in some southern English streams: the influence of physicochemical factors. Freshwat. Biol. 13: 521–544.
Townsend, C.R. A.G. Hildrew, and K. Schofield. 1987. Persistence of stream invertebrate communities in relation to environmental variability. J. Anim. Ecol. 56: 597–613.
Van Dijk, Th.S. 1986. Changes in the carabid fauna of a previously agricultural field during the first twelve years of impoverishing treatments. Neth. J. Zool. 36: 413–437.
Wilson, J.B. 1990. Mechanisms of species coexistence: twelve explanations for Hutchinson’s ‘paradox of the plankton’: evidence from New Zealand plant communities. New Zealand J. Ecol. 13: 17–42.
Wilson, J.B. 1994. The ‘intermediate disturbance hypothesis’ of species coexistence based on patch dynamics. New Zealand J. Ecol. 18: 176–181.
Wolda, H., K. Spitzer and J. Leps. 1992. Stability of environment and of insect populations. Res. Popul. Ecol. 34: 213–225.
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Therriault, T.W., Kolasa, J. Patterns of community variability depend on habitat variability and habitat generalists in natural aquatic microcosms. COMMUNITY ECOLOGY 1, 195–203 (2000). https://doi.org/10.1556/ComEc.1.2000.2.9
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DOI: https://doi.org/10.1556/ComEc.1.2000.2.9