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Population structure, growth rates and spatial distribution of two dioecious tree species in a wet forest in Puerto Rico

Published online by Cambridge University Press:  28 May 2010

Jimena Forero-Montaña ,
Jess K. Zimmerman  and
Jill Thompson
Jimena Forero-Montaña*
Affiliation:
Department of Biology, University of Puerto Rico, Rio Piedras, San Juan, P.R.USA00936-8377
Jess K. Zimmerman
Affiliation:
Institute for Tropical Ecosystem Studies, University of Puerto Rico, Rio Piedras, San Juan, P.R. 00936-8377USA
Jill Thompson
Affiliation:
Institute for Tropical Ecosystem Studies, University of Puerto Rico, Rio Piedras, San Juan, P.R. 00936-8377USA
*
1Corresponding author. Email: jimefore@yahoo.com
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Abstract:

Dioecious plants often exhibit male-biased sex ratios and sexual differences in life history traits such as plant size, growth rate and frequency of flowering, which arise from the different costs of reproduction for male and female plants. In tropical dioecious species sexual differences in reproductive costs have been demonstrated for several subcanopy species, but few canopy dioecious trees have been studied. We recorded the sexual expression of c. 2600 trees of Cecropia schreberiana and Dacryodes excelsa, two canopy dioecious species, during several censuses over 2 y in a 16-ha plot located in ‘subtropical wet forest’ in the Luquillo Mountains, Puerto Rico. There were similar numbers of male and female trees of C. schreberiana but D. excelsa had a female-biased population. Cecropia schreberiana showed no differences in male and female diameter distributions or growth rates, suggesting that reproductive maturation and longevity are similar for both sexes. This lack of differences in size and growth rate in C. schreberiana may result from mechanisms to compensate for the higher cost of reproduction in females, no resource limitation related to its pioneer life-history, or similar male and female reproductive costs. In contrast, D. excelsa males were larger than females, probably because males grow slightly faster than females. This sexual difference in D. excelsa may reflect a higher cost of reproduction in females than in males. Spatial segregation of males and females into different habitats is not common in tropical forest and neither C. schreberiana nor D. excelsa males and females exhibited significant spatial segregation. The contrasting results for these two canopy species reflect their different life history strategies in this hurricane-affected forest.

Keywords

BurseraceaeCecropiaceaedioecyLuquillo Forest Dynamics Plotsexual dimorphismsex ratiosize distributiontropical trees
Type
Research Article
Information
Journal of Tropical Ecology , Volume 26 , Issue 4 , July 2010 , pp. 433 - 443
Copyright
Copyright © Cambridge University Press 2010

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References

LITERATURE CITED

BADDELEY, A. & TURNER, R. 2005. Spatstat: an R package for analyzing spatial point patterns. Journal of Statistical Software 12:1–42.CrossRefGoogle Scholar
BAROT, S., GIGNOUX, J. & MENAUT, J. C. 1999. Demography of a savanna palm tree: predictions from comprehensive spatial pattern analyses. Ecology 80:1987–2005.CrossRefGoogle Scholar
BASNET, K. 1992. Effect of topography on the pattern of trees in tabonuco (Dracryodes excelsa) dominated rain forest of Puerto Rico. Biotropica 24:31–42.CrossRefGoogle Scholar
BEARD, K. H., VOGT, K. A., VOGT, D. J., SCATENA, F. N., COVICH, A. P., RAGNHILDUR, S., SICCAMA, T. G. & CROWL, T. A. 2005. Structural and functional responses of a subtropical forest to 10 years of hurricanes and droughts. Ecological Monographs 75:345–361.CrossRefGoogle Scholar
BIERZYCHUDEK, P. & ECKHART, V. 1988. Spatial segregation of the sexes of dioecious plants. American Naturalist 132:34–43.CrossRefGoogle Scholar
BROKAW, N. V. L. 1998. Cecropia schreberiana in the Luquillo Mountains of Puerto Rico. The Botanical Review 64:94–120.CrossRefGoogle Scholar
BROKAW, N., FRAVER, S., GREAR, J. S., THOMPSON, J., ZIMMERMAN, J. K., WAIDE, R. B., EVERHAM, E. M., HUBBELL, S. P., CONDIT, R. & , FOSTER. R. B. 2004. Disturbance and canopy structure in two tropical forests. Pp. 177–194 in Losos, E. C. & Leigh, E. G. (eds.). Tropical forest diversity and dynamism: results from a long-term tropical forest network. The University of Chicago Press, Chicago.Google Scholar
BROWN, S., LUGO, A. E., SILANDER, S. & LIEGEL, L. 1983. Research history and opportunities in the Luquillo Experimental Forest. USDA Forest Service General Technical Report SO-44, Southern Forest Experimental Station, New Orleans. 128 pp.CrossRefGoogle Scholar
BULLOCK, S. H. & BAWA, K. S. 1981. Sexual dimorphism and the annual flowering pattern in Jacaratia dolichaula (D. Smith) Woodson (Caricaceae) in a Costa Rican rain forest. Ecology 62:1494–1504.CrossRefGoogle Scholar
CIPOLLINI, M. L. & STILES, E. 1991. Costs of reproduction in Nyssa sylvatica: sexual dimorphism in reproductive frequency and nutrient flux. Oecologia 86:585–593.CrossRefGoogle ScholarPubMed
CLARK, D. A. & CLARK, D. B. 1987. Temporal and environmental patterns of reproduction in Zamia skinneri, a tropical rain forest cycad. Journal of Ecology 75:135–149.CrossRefGoogle Scholar
CRAWLEY, M. J. 2007. The R book. John Wiley and Sons Ltd, Chichester. 942 pp.CrossRefGoogle Scholar
DALGAARD, P. 2002. Introductory statistics with R. Springer, New York. 267 pp.Google Scholar
DAWSON, T. E. & EHLERINGER, J. R. 1993. Gender specific physiology, carbon isotope discrimination, and habitat distribution in box-elder, Acer negundo. Ecology 74:798–815.CrossRefGoogle Scholar
DIGGLE, P. J. 1983. Statistical analysis of spatial point patterns. Academic Press, London. 288 pp.Google Scholar
ESTRADA PINTO, A. 1970. Phenological studies of trees at El Verde. Pp. D237–D269 in Odum, H. T. & Pigeon, R. F. (eds.). A tropical rain forest: a study of irradiation and ecology at El Verde, Puerto Rico. US Atomic Energy Commission, Division of Technical Information Extension, Oak Ridge.Google Scholar
EWEL, J. J. & WHITMORE, J. L. 1973. The ecological life zones of Puerto Rico and the United States Virgin Islands. Forest Service Research Papers ITF-18. International Institute of Tropical Forestry, Rio Piedras. 72 pp.Google Scholar
FORERO-MONTAÑA, J. & ZIMMERMAN, J. K. In press. Sexual dimorphism in the timing of flowering of two dioecious trees in a subtropical wet forest, Puerto Rico. Caribbean Journal of Science.Google Scholar
FREEMAN, D. C., KLIKOFF, L. G. & HARPER, K. T. 1976. Differential resource utilization by the sexes of dioecious plants. Science 193:597–599.CrossRefGoogle ScholarPubMed
JOHNSTON, M. H. 1992. Soil–vegetation relationships in a tabonuco forest community in the Luquillo Mountains of Puerto Rico. Journal of Tropical Ecology 8:253–263.CrossRefGoogle Scholar
LLOYD, D. G. & WEBB, C. J. 1977. Secondary sex characters in plants. The Botanical Review 43:177–216.CrossRefGoogle Scholar
LOSOS, E. C. & LEIGH, E. G. (eds.). 2004. Tropical forest diversity and dynamism: findings from a large-scale plot network. University of Chicago Press, Chicago. 645 pp.Google Scholar
LUGO, A. E. & WADSWORTH, F. H. 2000. Dacryodes excelsa Vahl. Tabonuco. Pp. 186–189 in Francis, J. K. & Lowe, C. A. (eds.). Silvics of native and exotic trees of Puerto Rico and the Caribbean Islands. General Technical Report IITF – 15. US Department of Agriculture, Forest Service, International Institute of Tropical Forestry, Rio Piedras. 582 pp.Google Scholar
MEAGHER, T. R. & ANTONOVICS, J. 1982. The population biology of Chamaelirium luteum, a dioecious of the lily family: life history studies. Ecology 63:1690–1700.CrossRefGoogle Scholar
MELAMPY, M. & HOWE, H. 1977. Sex ratio in the tropical tree Triplaris americana (Polygonaceae). Evolution 31:867–872.CrossRefGoogle ScholarPubMed
NICOTRA, A. B. 1998. Sex ratio variation and spatial distribution of Siparuna grandiflora, a tropical dioecious shrub. Oecologia 115:102–113.CrossRefGoogle ScholarPubMed
NICOTRA, A. B. 1999a. Reproductive allocation and long-term reproductive costs of reproduction in Siparuna grandiflora, a dioecious neotropical shrub. Journal of Ecology 87:138–149.CrossRefGoogle Scholar
NICOTRA, A. B. 1999b. Sexually dimorphic growth in the dioecious tropical shrub, Siparuna grandiflora. Functional Ecology 13:322–331.CrossRefGoogle Scholar
OBESO, J. R. 2002. The cost of reproduction in plants. New Phytologist 115:321–348.CrossRefGoogle Scholar
OPLER, P. & BAWA, K. S. 1978. Sex ratios in tropical forest trees. Evolution 32:812–821.CrossRefGoogle ScholarPubMed
QUEENBOROUGH, S. A., BURSLEM, D. F.R. P., GARWOOD, N. C. & VALENCIA, R. 2007. Determinants of biased sex ratios and inter-sex costs of reproduction in dioecious tropical forests trees. American Journal of Botany 94:67–78.CrossRefGoogle Scholar
QUINN, G. P. & KEOUGH, M. J. 2002. Experimental design and data analysis. Cambridge University Press, Cambridge. 537 pp.Google Scholar
RICE, K., BROKAW, N. & THOMPSON, J. 2004. Liana abundance in a Puerto Rican forest. Forest Ecology and Management 190:33–41.CrossRefGoogle Scholar
RICE, W. R. 1989. Analyzing tables of statistical test. Evolution 43:223–225.CrossRefGoogle Scholar
RIPLEY, B. D. 1981. Spatial statistics. Wiley, New York. 274 pp.CrossRefGoogle Scholar
SHEA, M. M., DIXON, P. M. & SHARITZ, R. R. 1993. Size differences, sex ratio, and spatial distribution of male and female water tupelo, Nyssa aquatica (Nyssaceae). American Journal of Botany 80:26–30.CrossRefGoogle Scholar
SILANDER, S. R. & LUGO, A. E. 2000. Cecropia schreberiana Miq. Yagrumo hembra, Trumpet-tree. Pp. 122–127 in Francis, J. K. & Lowe, C. A. (eds.). Silvics of native and exotic trees of Puerto Rico and the Caribbean Islands. General Technical Report IITF – 15. U.S. Department of Agriculture, Forest Service, International Institute of Tropical Forestry, Rio Piedras. 582 pp.Google Scholar
SOIL SURVEY STAFF 1995. Order 1 Soil Survey of the Luquillo Long-Term Ecological Research Grid, Puerto Rico. USDA, Natural Resources Conservation Service, Lincoln, Nebraska, USDA. 92 pp.Google Scholar
SOKAL, R. R. & ROHLF, J. E. 1995. Biometry. (Third edition). W. H. Freeman and Company, New York. 887 pp.Google Scholar
STEHLIK, I., KRON, P., BARRETT, S. C. & HUSBAND, B. C. 2007. Sexing pollen reveals female bias in a dioecious plant. New Phytologist 175:185–194.CrossRefGoogle Scholar
THOMAS, S. C. 1997. Geographic parthenogenesis in a tropical forest tree. American Journal of Botany 84:1012–1015.CrossRefGoogle Scholar
THOMAS, S. C. & LAFRANKIE, J. V. 1993. Sex, size and interyear variation in flowering among dioecious trees of the Malayan rain forest. Ecology 74:1529–1537.CrossRefGoogle Scholar
THOMPSON, J., BROKAW, N. V. L., ZIMMERMAN, J. K., WAIDE, R. B., EVERHAM, E. M., LODGE, D. J., TAYLOR, C. M., GARCÍA-MONTIEL, D. & FLUET, M. 2002. Land use history, environment, and tree composition in a tropical forest. Ecological Applications 12:1344–1363.CrossRefGoogle Scholar
THOMPSON, J., BROKAW, N., ZIMMERMAN, J. K., WAIDE, R. B., EVERHAM III, E. M. & SCHAEFER, D. A. 2004. Luquillo Forest Dynamics Plot, Puerto Rico, United States. Pp. 540–550 in Losos, E. C. & Leigh, E. G. (eds.). Tropical forest diversity and dynamism: results from a long-term tropical forest network. The University of Chicago Press, Chicago.Google Scholar
TURNER, I. M. 2001. The ecology of trees in the tropical rain forest. Cambridge University Press, Cambridge. 298 pp.CrossRefGoogle Scholar
WHEELWRIGHT, N. T. & BRUNEAU, A. 1992. Population sex ratios and spatial distribution of Ocotea tenera (Lauraceae) trees in a tropical forest. Journal of Ecology 80:425–432.CrossRefGoogle Scholar
ZIMMERMAN, J. K., EVERHAM, E. M., WAIDE, R. B., LODGE, D. J., TAYLOR, C. M. & BROKAW, N. V. L. 1994. Responses of tree species to hurricane winds in subtropical wet forest in Puerto Rico: implications for tropical tree life histories. Journal of Ecology 82:911–922.CrossRefGoogle Scholar
ZIMMERMAN, J. K., THOMPSON, J. & BROKAW, N. 2008. Large tropical forest dynamics plots: testing the explanations for the maintenance of species diversity. Pp. 98–117 in Carson, W. & Schnitzer, S. (eds.), Tropical forest community ecology. Blackwell, Oxford.Google Scholar
ZIMMERMAN, J. K., WRIGHT, S. J., CALDERÓN, O., APONTE-PAGÁN, M. & PATON, S. 2007. Flowering and fruiting phenologies of seasonal and asesonal neotropical forests: the role of annual changes in irradiance. Journal of Tropical Ecology 23:231–251.CrossRefGoogle Scholar