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|a (JST)4092107
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|a DE-627
|b ger
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|e rakwb
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|a eng
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|a Newbery, D. M.
|e verfasserin
|4 aut
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|a Resistance of a Lowland Rain Forest to Increasing Drought Intensity in Sabah, Borneo
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|c 2004
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|a Text
|b txt
|2 rdacontent
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|a Computermedien
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|a Occasional strong droughts are an important feature of the climatic environment of tropical rain forest in much of Borneo. This paper compares the response of a lowland dipterocarp forest at Danum, Sabah, in a period of low (LDI) and a period of high (HDI) drought intensity (1986-96,9.98 y; 1996-99,2.62 y). Mean annual drought intensity was two-fold higher in the HDI than LDI period (1997 v. 976 mm), and each period had one moderately strong main drought (viz. 1992, 1998). Mortality of 'all' trees $\geq 10 cm\;gbh$ (girth at breast height) and stem growth rates of 'small' trees 10-< 50 cm gbh were measured in sixteen 0.16-ha subplots (half on ridge, half on lower slope sites) within two 4-ha plots. These 10-50-cm trees were composed largely of true understorey species. A new procedure was developed to correct for the effect of differences in length of census interval when comparing tree mortality rates. Mortality rates of small trees declined slightly but not significantly between the LDI and HDI periods (1.53 to $1.48% y^{-1}$ ): mortality of all trees showed a similar pattern. Relative growth rates declined significantly by 23% from LDI to HDI periods (11.1 to $8.6 mm\;m^{-1}\;y^{-1}$ ): for absolute growth rates the decrease was 28% (2.45 to $1.77 mm\;y^{-1}$ ). Neither mortality nor growth rates were significantly influenced by topography. For small trees, across subplots, absolute growth rate was positively correlated in the LDI period, but negatively correlated in the HDI period, with mortality rate. There was no consistent pattern in the responses among the 19 most abundant species $(n \geq 50 trees)$ which included a proposed drought-tolerant guild. In terms of tree survival, the forest at Danum was resistant to increasing drought intensity, but showed decreased stem growth attributable to increasing water stress.
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|a Copyright 2004 Cambridge University Press
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|a Borneo
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|a Drought
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|a Forest Dynamics
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|a Interval Correction
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|a Mortality
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|a Tree Growth
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|a Understorey
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|a Environmental studies
|x Atmospheric sciences
|x Meteorology
|x Meteorological phenomena
|x Weather
|x Weather conditions
|x Drought
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|a Social sciences
|x Population studies
|x Mortality
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|a Biological sciences
|x Ecology
|x Population ecology
|x Synecology
|x Biocenosis
|x Plant communities
|x Forests
|x Rain forests
|x Tropical rain forests
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|a Environmental studies
|x Atmospheric sciences
|x Meteorology
|x Hydrometeorology
|x Precipitation
|x Rain
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|a Biological sciences
|x Biology
|x Botany
|x Dendrology
|x Trees
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|a Biological sciences
|x Biology
|x Botany
|x Plant ecology
|x Forest ecology
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|a Biological sciences
|x Biology
|x Botany
|x Plant ecology
|x Forest ecology
|x Forest ecosystems
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|a Biological sciences
|x Biology
|x Botany
|x Plant ecology
|x Vegetation
|x Vegetation structure
|x Plant strata
|x Vegetation canopies
|x Understory
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|a Physical sciences
|x Earth sciences
|x Geography
|x Geomorphology
|x Topography
|x Lowlands
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|a Biological sciences
|x Ecology
|x Population ecology
|x Synecology
|x Biocenosis
|x Plant communities
|x Forests
|x Tropical forests
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|a research-article
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|i Enthalten in
|t Journal of Tropical Ecology
|d Cambridge University Press, 1985
|g 20(2004), 6, Seite 613-624
|w (DE-627)266015972
|w (DE-600)1466679-0
|x 14697831
|7 nnns
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|g volume:20
|g year:2004
|g number:6
|g pages:613-624
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|u https://www.jstor.org/stable/4092107
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|d 20
|j 2004
|e 6
|h 613-624
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