Survivorship of Shorea curtisii seedlings in a hill dipterocarp forest, Peninsular Malaysia
2016
K. Kimura | S. Lida | T. Sato | R. Azizi | K. Niiyama | K. Abd Rahman
Lowland and hill dipterocarp forests in Peninsular Malaysia experienced droughts and general flowering events around 1997 due to El Niño effects. From 1996–98, we studied the process of flowering to seedling survivorship of a dominant tree species, Shorea curtisii, in a 6-ha primary hill dipterocarp forest plot in Semangkok Forest Reserve, Peninsular Malaysia. About 18% of the mother trees larger than 30 cm diameter at breast height flowered in 1996. One hundred seed traps were set up on a 2-ha core area within the 6-ha plot. A total of 85 traps captured S. curtisii seeds. Sound seeds comprised 32.3% of total seeds in 1996. Germination and seedling survivorship were monitored in 100, 1-m2 quadrats, which were adjacent to the 100 seed traps, from 24 October 1996 to 8 November 1998. Shorea curtisii seedling mortality was very high (96.5%, n = 201), and only 7 of the 201 germinated seedlings survived in four quadrats on the ridge and upper slope. Shorea curtisii seedlings could not effectively survive under the closed canopy of a primary hill dipterocarp forest with dense cover of the Bertam palm, Eugeissona tristis.
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