GROWTH AND SURVIVAL OF SEEDLINGS AND SAPLINGS IN THE LOGGED - OVER FOREST, KINTAP, SOUTH KALIMANTAN

Author

Yusuf S. Jafarsidik

Abstract

A study on demography,  growth  and survival of  seedlings and saplings was conducted  in the Hutan Kintap  concenssion,   South Kalimantan,   Indonesia. The aim of  the study  was to monitor  pattern  of growth of seedlings and saplings among different types of logged -  over forest, including the newly  logged  -  forest, older  logged  -  over forests   (treated and untreated),   and un-logged-forest    patches.   The  study began in 1991, and nineteen  of  0.25  ha plots   were set up in a total  of  six blocks  designated   as consecutively  A, B, C, D, E and F.  Block A was a newly logged   forest and had five plots,  and Block  B -  D were in forest which  had been logged  in 1979.  Block B (five plots) had received no silvicultural   treatment,  while Block  C (five plots) and  D (one plot)   had  been  lightly   thinned  after  felling and  further  Block C received  a further  thinning treatment   Block  E (one plot)  had been  heavily   thinned,  and Block F (2 plots)   was an un-logged   control. The  density  of  seedling  varied within  the study sites, and averaged  from  47,000 ha"  to 121,000   ha·1•   The mean height increment  of  seedlings varied among block ranging from 2.9  cm year'  to 10.5  cm year".  Block A had the highest general  mean  increment  of  10.5  cm year",   followed  in decreasing  order  by Block C of 5.4 and Block F, 4.5  cm year".  Growth  of  seedling in Block  B was low, even lower  than  the growth  in the un-logged   Block F. The  difference  of the increment among Block A, B, C and F however was not significant. The liberation treatment  in Block C significantly   resulted in a higher (p<0.01)  increment  (5.4 cm year") than that in  the untreated  Block  B (2.9 cm year").  Seedling  mortality ranged from 16 to 37 % year", and declined with  height   class. The  mortality  of  seedlings  might  be related  among  other  factors  to the  humidity  and density  of  seedlings per-unit  area. The  density  of  sapling ranged  from 6,800 ha" to 7,700  ha" and they had diameter  growth  of  0.8 mm  year" to  2.2  mm year",  and height   growth  of  12.6  cm year" to 21.8  cm year"1. The  difference  in the  diameter  increment   among  block  r\, B,  C and  F was  not  significant.    The  average sapling height increment  varied (but not significantly so) among Block,  ranging from 12.6  cm year" in Block A to 21.8  cm year" in Block C. Mortality  of  sapling was relatively   low  in all block.  Higher  mortality  in the un-logged   forest  Block  I' and  in the untreated  Block B might  due to  the low  degree  of  canopy   opening.

Keywords

seedling, growth, mortality, dipterocarp, pioneers, logged-over forest

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References

Brokaw, N. V. L 1985. Gap phase regeneration in tropical forest. Ecology 66: 682-687. Connell, J. H. 1989. Some processes affecting the species composition in forest gap. Ecology 70: 560 - 562 .

Korning, J. and Balslev, H. 1994. Growth rates and mortality patterns of tropical lowland tree species and the relation to forest structure in Amazonia Equador. Journal of tropical Ecology 10: 151 -166.

Kuusipalo,J., Y Jafarsidik, G. Adjers, and K Tuomela. 1996. Population dynamics of tree seedlings in a mixed dipterocarp rainforest before and after logging and crown liberation. Forest Ecology and Management 81: 85 - 94.

Liew, T.C and F.O. Wong. 1973. Density, recruitment, mortality and growth of Dipterocarp seedling in virgin and logged-over forests in Sabah. Malaysian Forester 36: 3 - 15.

Nicholson, D. I. 1958. Natural regeneration of logged tropical rain forest, North Borneo. Malayana Forester 21: 235 - 245.

Nicholson, D. I. 1965. A review of natural regeneration in the dipterocarp forest of Sabah. Malayana Forest 28: 4 - 26.

Popma, J. and F. Bongers. 1988. The effect of canopy gaps on growth and morphology of seedlings of rain forest species. Oecologia 75: 625 - 632.

Swaine, M. D. and TC. Whitmore. 1988. On the definition of ecological species groups in tropical rain forest. Vegetation 75: 81 - 86.

Turner, I. M. 1990.a. The seed.ling survivorship and growth of three Sborea species in a Malaysian tropical rain forest. Journal of Tropical Ecology 6: 469 - 478.

Turner, I. M. 1990b. Tree seed.ling growth and survival in a Malaysian rain forest. Biotropica 22: 146 -154.

Uhl, C., K. Clark, N. Dezzo and Maquirino 1988. Vegetation dynamics in Amazonian treefall gaps. Ecology 69: 751 -154.

Whitmore, T. C. 1984. Tropical Rain Forests of the Far East 2nd edition. Clarendon Press.Oxford.

Whitmore, T. C. 1986. Forest dynamics and question of scale. Rain Forest Regeneration and Management. Report of a workshop (ed. M. Hadley), pp. 13 - 15. Biology International, Special Issue 18.

Whitmore, T. C. 1989. Canopy gaps and two major group of forest trees Ecology 70: 536 - 538.

DOI: http://dx.doi.org/10.20886/ijfr.2004.1.1.60-74

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