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Distribution of androdioecious and hermaphroditic populations of the mangrove Laguncularia racemosa (Combretaceae) in Florida and the Bahamas

  • Carol L. Landry (a1), Beverly J. Rathcke (a1) and Lee B. Kass (a2)
Abstract
Abstract:

The breeding system of Laguncularia racemosa is variable among populations; some populations are androdioecious while other populations lack male plants. To determine whether androdioecy is widespread in L. racemosa, 65 populations were surveyed in Florida and the Bahamas. Fruits are water-dispersed, so the observed distribution of breeding systems was compared to local and regional water currents in order to determine whether dispersal could be important to the maintenance of male plants in androdioecious populations. Twenty-two of the 36 populations surveyed in Florida were androdioecious, with male frequencies that ranged from 1–68%. On the Florida east coast, all populations north of latitude 26°30′ N lacked males while all populations south of this latitude were androdioecious, which suggests that northern populations may lack males due to dispersal limitation. The pattern of distribution on the Florida west coast suggests that males may be maintained in some populations via dispersal. Nine islands in north-central Bahamas were surveyed, and androdioecious populations were found only on San Salvador Island, where male frequencies ranged from 5–28%. Dispersal, fragmentation, and selection hypotheses are suggested to explain the observed pattern of distribution; these hypotheses will be tested in future studies.

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Corresponding author
1Corresponding author. Present address: Ohio State University–Mansfield, Department of Evolution, Ecology and Organismal Biology, 1760 University Dr., Mansfield, OH 44906, USA. Email: landry.26@osu.edu
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J. AKIMOTO , T. FUKUHARA & K. KIKUZAWA 1999. Sex ratios and genetic variation in a functionally androdioecious species, Schizopepon bryoniaefolius (Cucurbitaceae). American Journal of Botany 86:880886.

B. DOMMEE , A. GESLOT , J. D. THOMPSON , M. REILLE & N. DENELLE 1999. Androdioecy in the entomophilous tree Fraxinus ornus (Oleaceae). New Phytologist 143:419426.

W. T. GILLIS 1974. Phantoms in the flora of the Bahamas. Phytologia 29:154166.

K. ISHIDA & T. HIURA 1998. Pollen fertility and flowering phenology in an androdioecious tree, Fraxinus lanuginosa (Oleaceae), in Hokkaido, Japan. International Journal of Plant Sciences 159:941947.

C. L. LANDRY & B. J. RATHCKE 2007. Do inbreeding depression and relative male fitness explain the maintenance of androdioecy in white mangrove, Laguncularia racemosa (Combretaceae)? New Phytologist 176:891901.

A. LISTON , L. H. RIESEBERG & T. S. ELIAS 1990. Datisca glomerata is functionally androdioecious. Nature 343:641642.

D. LLOYD 1975. The maintenance of gynodioecy and androdioecy in angiosperms. Genetica 45:325339.

D. J. OBBARD , S. A. HARRIS & J. R. PANNELL 2006. Sexual systems and population genetic structure in an annual plant: testing the metapopulation model. American Naturalist 167:354366.

J. PANNELL 1997a. Variation in sex ratios and sex allocation in androdioecious Mercurialis annua. Journal of Ecology 85:5769.

J. PANNELL 1997b. Widespread functional androdioecy in Mercurialis annua L. (Euphorbiaceae). Biological Journal of the Linnean Society 61:95116.

J. PANNELL 1997c. The maintenance of gynodioecy and androdioecy in a metapopulation. Evolution 51:1020.

J. R. PANNELL 2002. The evolution and maintenance of androdioecy. Annual Review of Ecology and Systematics 33:397425.

J. R. PANNELL & F. OJEDA 2000. Patterns of flowering and sex-ratio variation in the Mediterranean shrub Phillyrea angustifolia (Oleaceae): implications for the maintenance of males with hermaphrodites. Ecology Letters 3:495502.

C. VASSILIADIS , M. VALERO , P. SAUMITOU-LAPRADE & B. GODELLE 2000. A model for the evolution of high frequencies of males in an androdioecious plant based on a cross-compatibility advantage of males. Heredity 85:413422.

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Journal of Tropical Ecology
  • ISSN: 0266-4674
  • EISSN: 1469-7831
  • URL: /core/journals/journal-of-tropical-ecology
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