Population consequences of changes in an ant-seed mutualism in Sanguinaria canadensis - Oecologia
- ️Culver, David C.
- ️Tue Jul 01 1980
Summary
Seed dispersal by ants was studied in three populations of the myrmecochore, Sanguinaria canadensis, located in three habitats, each of which showed a different level of disturbance. Frequency of seed removal and the distances seeds were carried by ants were related to plant density, dispersion and the relative proportions of sexual and asexual reproduction in each population. Seeds in the least disturbed habitat were removed frequently and carried, by a wide variety of ants, distances of up to 12 m. Plant density was low and clone size was small. There was a relatively low level of sexual (seed) reproduction but seeds were generally transported well beyond the boundaries of the parent clones. By contrast, at the most disturbed site, plant density was high and clone size was very large. While there was a high level of seed production, seeds were rarely moved by ants and since removal distances were short, the probability of a seed being relocated beyond the limits of the parent clone was miniscule. The third population from a habitat which was intermediate in disturbance yielded data intermediate to the others. The data show that habitat disturbance, in disrupting the ant fauna and hence the ant-seed mutualism, has profound effects upon population density, dispersion and patterns of reproduction. Density-dependent regulation of sexual output predicted, for example, by the Strawberry-Coral model (Williams 1975), is maladaptive when the antseed mutualism is disturbed. We discuss the implications of this for theoretical modeling, the significance of mutualisms and the assessment of disturbance for conservation.
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References
Beattie AJ, Lyons N (1975) Seed dispersal in Viola (Violaceae) Adaptations and Strategies. Am J Bot 62:714–722
Beattie AJ, Culver DC, Pudlo RJ (1979) Interactions between ants and the diaspores of some common spring-flowering herbs in West Virginia. Castanea 44:177–186
Bresinsky A (1963) Bau, Entwicklungsgeschichte und Inhaltsstoffe der Elaiosomen. Bibliotheca Botanica 126:1–54
Crozier, RH (1977) Genetic differentiation between population of the ant Aphaenogaster rudis in the southeastern United States. Genetica 47:17–36
Culver DC, Beattie AJ (1978) Myrmecochory in Viola: Dynamics of seed-ant interactions in some West Virginia species. J Ecol 66:53–72
Dreyer WA, Park T (1932) Local distribution of Formica ulkei mound nests with reference to ecological factors. Psyche 39:127–133
Gregg RE (1944) The ants of the Chicago region. Ann Ent Soc Amer 37:447–48
Janzen DH 1974. The deflowering of Central America. Nature Hist 83(4):48–53
Kershaw KA (1973) Quantitative and Dynamic Plant Ecology. New York American Elsevier
Lefkovitch LP (1966) An index of spatial distribution. Res Pop Ecol 8:89–92
Marshall DL, Beattie AJ, Bollenbacher WE (1979) Evidence for diglycerides as attractants in an ant-seed interaction. J Chem Ecol 5:335–344
Martin AC, Zim HS, Nelson AL (1951) American wildlife and plants. A guide to wildlife food habits. New York Dover
May RM (1973) Qualitative stability in model ecosystems. Ecology 54:638–641
May RM (1976) Theoretical Ecology. Philadelphia: Saunders
Olmstead NW, Curtis JD (1947) Seeds of the forest floor. Ecology 28:49–52
Schemske DW, Willson MF, Melampy MN, Miller LJ, Verner L, Schemske KM, Best LB (1978) Flowering ecology of some spring woodland herbs. Ecology 59:351–366
Sernander R (1906) Entwurf einer Monographie der europäischen Myrmecochoren. Kungliga Svenska Vetenskapsakademiens Handlingar 41:1–407
Sokal RR, Rohlf FJ (1969) Biometry. San Francisco Freeman
Strausbaugh PD, Core EL (1970–77) Flora of West Virginia parts I–IV. Morgantown: University of West Virginia Press
Talbot M (1934) Distribution of ant species in the Chicago region with reference to ecological factors and physiological toleration. Ecology 15:416–439
Thomas WA, Goldstein G, Wilcox WH (1973) Biological indicators of environmental quality A bibliography of abstracts. Ann Arbor Science Publ Ind Ann Arbor
Thompson JN, Willson MF (1978) Disturbance and dispersal of fleshy fruits. Science 200:1161–1163
Williams GC (1975) Sex and Evolution. Princeton Princeton University Press
Witherby HF, Jourdain FCR, Ticehurst NF, Tucker BW (1952) The handbook of British Birds. London Witherby Ltd.
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Authors and Affiliations
Department of Biological Sciences, Northwestern University, 60201, Evanston, Illinois, USA
Ronald J. Pudlo, Andrew J. Beattie & David C. Culver
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- Ronald J. Pudlo
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- Andrew J. Beattie
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- David C. Culver
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Pudlo, R.J., Beattie, A.J. & Culver, D.C. Population consequences of changes in an ant-seed mutualism in Sanguinaria canadensis . Oecologia 46, 32–37 (1980). https://doi.org/10.1007/BF00346962
Issue Date: July 1980
DOI: https://doi.org/10.1007/BF00346962