Oecologia

, Volume 82, Issue 4, pp 501–506 | Cite as

Mating systems of two Bombacaceous trees of a neotropical moist forest

  • D. A. Murawski
  • J. L. Hamrick
  • S. P. Hubbell
  • R. B. Foster
Original Papers

Summary

A multilocus mixed mating model was used to analyze the mating systems of two tropical canopy trees in the Bombacaceae that differ in successional status and overall abundance. One population of each species was studied on Barro Colorado Island, Republic of Panama. Population outcrossing estimates of 0.57 and 0.35 from two years indicate a mixed-mating system with intermediate outcrossing levels for the gap-specialist Cavanillesia platanifolia, a relatively rare component of the island flora. Population and individual outcrossing estimates were associated with flowering tree density or degree of spatial isolation. Trees within clusters of flowering individuals have a higher degree of outcrossing than isolated trees. Annual estimates of individual tree outcrossing rates varied greatly as a function of flowering in its nearest neighbors. In contrast to C. platanifolia, Quararibea asterolepis was completely outcrossed and may be self incompatible. Maternal trees of both species had significantly heterogeneous pollen pools indicating non-random outcrossing. Apomixis by sporophytic agamospermy was rejected in C. platanifolia as contributing to the apparent selfing rate.

Key words

Bombacaceae Mating system Panama Rain forest Tropics 

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References

  1. Ashton PS (1977) A contribution of rain forest research to evolutionary theory. Ann Missouri Bot Gard 64:694–705Google Scholar
  2. Augspurger CK (1984a) Light requirements of neotropical tree seedlings: a comparative study of growth and survival. J Ecol 72:777–795Google Scholar
  3. Augspurger CK (1984b) Seedling survival among tropical tree species: interactions of dispersal distance, light gaps, and pathogens. Ecology 65:1705–1712Google Scholar
  4. Baker HG (1959) Reproductive methods as factors in speciation in flowering plants. Cold Spring Harbor Symp Quant Biol 24:177–199Google Scholar
  5. Baker HG, Baker I (1968) Chromosome numbers in the Bombacaceae. Bot Gaz 129:294–296Google Scholar
  6. Bawa KS (1974) Breeding systems of tree species of a lowland tropical community. Evolution 28:85–92Google Scholar
  7. Bawa KS (1979) Breeding systems of trees in a tropical wet forest. New Zealand J Bot 17:521–524Google Scholar
  8. Bawa KS, Perry DR, Beach JH (1985) Reproductive biology of tropical lowland rain forest trees. I. Sexual systems and incompatibility mechanisms. Am J Bot 72:331–345Google Scholar
  9. Brown AHD (1979) Enzyme polymorphisms in plant populations. Theor Pop Biol 15:1–42Google Scholar
  10. Brown AHD, Allard RW (1970) Estimation of the mating system in open-pollinated maize populations using isozyme polymorphisms. Genetics 66:133–145Google Scholar
  11. Clegg MT (1980) Measuring plant mating systems. Bioscience 30:814–818Google Scholar
  12. Croat TB (1978) Flora of Barro Colorado Island. Stanford University Press, Stanford, CAGoogle Scholar
  13. Ellstrand NC, Torres AM, Levin DA (1978) Density and the rate of apparent outcrossing in Helianthus annuus (Asteraceae). Syst Bot 3:403–407Google Scholar
  14. Federov AA (1966) The structure of the tropical rain forest and speciation in the humid tropics. J Ecol 54:1–11Google Scholar
  15. Fripp YJ, Griffin AR, Moran GF (1987) Variation in allele frequencies in the outcross pollen pool of Eucalyptus regnans F. Muell. throughout a flowering season. Heredity 59:161–171Google Scholar
  16. Garwood NC (1985) The role of mucilage in the germination of Cuipo, Cavanillesia platanifolia (H. & B.) H.B.K. (Bombacaceae), a tropical tree. Am J Bot 72:1095–1105Google Scholar
  17. Glover DE, Barrett SCH (1986) Variation in the mating system of Eichornia paniculata (Spreng.) Solms. (Pontederiaceae). Evolution 40:1122–1131Google Scholar
  18. Hamrick JL, Godt MJ (1989) Allozyme diversity in plants. In: Brown AHD, Clegg MT, Kahler AL, Weirs BS (eds) Population genetics and germplasm resources in crop improvement. Sinauer, pp 43–63Google Scholar
  19. Hamrick JL, Linhart YB, Mitton JB (1979) Relationships between life history characteristics and electrophoretically detectable genetic variation in plants. Ann Rev Ecol Syst 10:173–200Google Scholar
  20. Hartshorn GS (1978) Treefalls and tropical forest dynamics. In: Tomlinson PB, Zimmerman MW (eds) Tropical trees as living systems. Cambridge University Press, Cambridge, pp 617–638Google Scholar
  21. Hladik A, Hladik CM (1969) Rapports trophiques entre vegetation et primates dans la floret de Barro Colorado (Panama). La Terre et la Vie 1:25–117Google Scholar
  22. Hubbell SP, Foster RB (1990) Structure, dynamics, and equilibrium status of old-growth forest on Barro Colorado Island. In: Gentry AH (ed) Four neotropical forests. Yale University Press, New Haven, CT (in press)Google Scholar
  23. Kaur A, Ha CD, Jong K, Sands VE, Chan HT, Soepadmo E, Ashton PS (1978) Apomixis may be widespread among trees of the climax rain forest. Nature 271:440–441Google Scholar
  24. Lamb FB (1953) The forests of Darien, Panama. Caribbean Forest 14:128–135Google Scholar
  25. Loveless MD, Hamrick JL (1987) Distribución de la variación en especies de árboles tropicales. Rev Biol Trop 35 [S 1]:165–175Google Scholar
  26. Mitton JB, Linhart YB, Sturgeon KB, Hamrick JL (1979) Allozyme polymorphisms detected in mature needle tissue of ponderosa pine. J Heredity 70:86–89Google Scholar
  27. O'Malley DM, Bawa KS (1987) Mating system of a tropical rain forest tree species. Am J Bot 74:1143–1149Google Scholar
  28. Richards AJ (1986) Plant Breeding Systems. Allen and Unwin Press, London, UKGoogle Scholar
  29. Ritland K, Jain SK (1981) A model for the estimation of outcrossing rate and gene frequencies based on n independent loci. Heredity 47:37–54Google Scholar
  30. Schemske DW, Lande R (1985) The evolution of self-fertilization and inbreeding depression in plants. II. Empirical observations. Evolution 39:41–52Google Scholar
  31. Soltis DE, Haufler CH, Darrow DC, Gastony GJ (1983) Starch gel electrophoresis of ferns: a compilation of grinding buffers, gel and electrode buffers, and staining schedules. Am Fern J 73:9–15Google Scholar
  32. Stebbins GL (1957) Self fertilization and population variability in higher plants. Am Nat 91:337–354Google Scholar
  33. Sun M, Ganders FR (1988) Mixed mating systems in Hawaiian Bidens (Asteraceae). Evolution 42:516–527Google Scholar
  34. Tisserat B, Esan EB, Murashige T (1979) Somatic embryogenesis by Angiosperms. Hort Rev 1:1–78Google Scholar
  35. Vasek FC, Harding J (1976) Outcrossing and natural populations. V. Analysis of outcrossing, inbreeding, and selection in Clarkia exilis and Clarkia trembloriensis. Evolution 30:403–411Google Scholar
  36. Zapata TR, Arroyo MTK (1978) Plant reproductive ecology of a secondary deciduous tropical forest in Venezuela. Biotropica 10:221–230Google Scholar

Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • D. A. Murawski
    • 1
    • 2
  • J. L. Hamrick
    • 1
    • 2
  • S. P. Hubbell
    • 3
    • 4
  • R. B. Foster
    • 4
  1. 1.Department of BotanyUniversity of GeorgiaAthensUSA
  2. 2.Department of GeneticsUniversity of GeorgiaAthensUSA
  3. 3.Department of BiologyPrinceton UniversityPrincetonUSA
  4. 4.Smithsonian Tropical Research InstituteBalboaPanama

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