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1 In 1998, the forests of Lambir Hills National Park experienced a severe drought. Between late January and mid‐April, less than one‐fifth of the normal expected rainfall was received. To investigate the effects of the drought, survival among 6993 trees (≥ 1 cm d.b.h.) in the drought period (1997–98) was compared with survival among 7270 trees in the same area before the drought (1993–97).

2 Mortality rates for the pre‐drought and drought periods were calculated using maximum likelihood techniques. Forest wide mortality rates during the drought were 7.63% year⁻¹ as compared to 2.40% year⁻¹ during the pre‐drought period. Logistic regression was used to investigate habitat effects. During the pre‐drought period, soil type was the most important predictor of tree survival, while during the drought period, slope was the most important.

3 The mortality rate of large (≥ 10 cm d.b.h.) rare trees (< 2 individuals …