Effect of leaf litter on seed dormancy, germination and seedling survival of three tropical forest tree species in Ghana

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Research Paper 01/06/2015
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Effect of leaf litter on seed dormancy, germination and seedling survival of three tropical forest tree species in Ghana

Hamza Issifu, Bernice A. Okyere, Rikiatu Husseini
Int. J. Agron. Agri. Res.6( 6), 10-17, June 2015.
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The exact role of leaf litter and its interaction with irradiance in tree species regeneration is still poorly understood. We conducted a three – factor full factorial plant house experiment to determine the effect of leaf litter and irradiance (with particular interest in their interaction) on germination and seedling survival of three tropical tree species, namely; Khaya anthotheca (Welw.) C.DC., Terminalia superba Engl.& Diels and Cedrela odorata L. We made three predictions: 1. Seeds of tropical tree species take a longer period to germinate and also have lower germination percentage at full irradiance, 2. seedling survival is lower at full irradiance, 3. presence of litter at full irradiance reduces length of seed dormancy and increases seed germination and seedling survival. Our results indeed showed higher mean lengths of seed dormancy and lower germination percentages at full irradiance for all three species tested. Also, seedling survival was lowest at full irradiance and highest at intermediate irradiance. Germination percentages of all three species were higher with litter present than when litter was absent. The positive effect of litter on seed germination was higher at higher levels of irradiance. Presence of litter reduced length of seed dormancy only for seeds of C. odorata, but litter had no effect on seedling survival of any of the tested species, contrary to prediction. We suggest that very high irradiances may have adverse effects on regeneration of studied species, but presence of leaf litter may ameliorate adverse effects of high irradiance.


Brown N. 1994. The implications of climate and gap microclimate for seedling growth in a Bornean lowland rain forest. Journal of Tropical Ecology 9, 153 – 168.

Campbell DG, Richardson PM, Rosas A Jr. 1989. Field screening for allelopathy in tropical forest trees, particularly Duroia hirsuta, in the Brazilian Amazon. Biochemical Systematics and Ecology 17, 403 – 407.

Chazdon RL, Fetcher N. 1984. Photosynthetic light environments in a lowland tropical rainforest in Costa Rica. Journal of Ecology 72, 553–564.

Dalling JW, Hubbel SP. 2002. Seed size, growth rate and gap microsite conditions as determinants of recruitment success for pioneer species. Journal of Ecology 90, 557 – 568.

Fetcher N, Oberbauer SF, Strain BR. 1985. Vegetation effects on microclimate in lowland tropical forest in Costa Rica. International Journal of Biometeorology 29, 145 -155.

Hawthorne WD. 1995. Ecological profiles of Ghanaian forest trees. Tropical Forestry Papers 29, Oxford Forestry Institute, 345 p.

Kennedy DK, Swaine MD. 1992. Germination and growth of colonizing species in artificial gaps of different sizes in dipterocarp rain forest. Philosophical Transactions of the Royal Society Series B 335, 357 – 367.

Kyereh B, Swaine MD, Thompson J. 1999. Effect of irradiance on the germination of forest trees in Ghana. Journal of Ecology 87, 772-783.

Li M, Lieberman M, Lieberman D. 1996. Seedling demography in undisturbed tropical wet forest in Costa Rica. Ecology of Tropical Forest Tree Seedlings (ed. M.D. Swaine), 285 – 314 P. MAB Series 17. UNESCO/Parthenon, Paris / Carnforth.

Molofsky I, Augspurger CK. 1992. The effect of leaf litter on early seedling establishment in a tropical forest. Ecology 73, 68 – 77.

Nunez-Farfan J, Dirzo R. 1988. Within-gap spatial heterogeneity and seedling performance in a Mexican tropical forest. Oikos 51, 274 – 284.

Pearson TRH, Burslem DFRP, Mullins CE, Dalling JW. 2002. Germination ecology of Neotropical pioneers: interacting effects of environmental conditions and seed size. Ecology 83, 2798 – 2807.

Poorter L. 1999. Growth responses of 15 rain-forest tree species to a light gradient: the relative importance of morphological and physiological traits. Functional Ecology 13, 396 – 410.

Pritchett WL., Fisher RF. 1987. Properties and management of forest soils. 2nd ed. John Wiley and Sons, Toronto, Ontario.

Sokal RR, Rohlf FJ. 1995. Biometry: the principles and practice of statistics in biological research. 3rd Edition, W.H. Freeman, New York.

Swaine MD, Whitmore TC. 1988. On the definition of ecological species groups in tropical rain forests. Vegetatio 75, 81 – 86.

Thompson K, Grime JP, Mason G. 1977. Seed germination in response to diurnal fluctuations of temperature. Nature 267, 147 – 149.

Vazquez-Yanes C, Orozco-Segovia A, Rincon, E, Sanchez-Coronado ME, Huante P, Toledo JR, Barradas VL. 1990. Light beneath the litter in a tropical forest: effect on seed germination. Ecology 71, 1952 – 1958.

Vâzquez-Yanes C. 1974. Studies on the germination of seeds of Ochroma lagopus. Swartz Turrialba 24, 176 – 179.

Vázquez-Yanes C, Orozco-Segovia A. 1992. Effects of litter from a tropical rain forest on tree seed germination and establishment under controlled conditions. Tree Physiology 11, 391– 400.

Vâzquez-Yânes C, Smith H. 1982. Phytochrome control of seed germination in the tropical rainforest pioneer trees, Cecropia obtusifolia and Piper auritum, and its ecological significance. New Phytologist 92, 477 – 485.

Veenendaal EM, Swaine MD, Lecha RT, Walsh MF, Abebrese IK. OwusuAfriyie K. 1996. Responses of West African forest tree seedlings to irradiance and soil fertility. Functional Ecology 10(4), 501 – 511. http://dx.doi.org/10.2307/2389943.

Whitmore TC. 1975. Tropical rain forest of the Far East. Oxford Claredon Press 278 p.