Habitat Preferences of Aporosa in Two Malaysian Forests: Implications for Abundance and Coexistence

Debski, Igor; Burslem, David F. R. P.; Palmiotto, Peter A.; LaFrankie, James V.; Lee, H. S.; Manokaran, N.

doi:10.2307/3071782

Cited by 33 publications

(51 citation statements)

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“…The change from aggregation to regular distribution, however, suggests that density-dependent mortality erased aggregation within the specific habitat. Nevertheless, the effects of habitat association on structuring spatial patterns were generally weak, in concordance with previous studies (Webb and Peart 2000;Harms et al 2001;Debski et al 2002). The weak effects were likely caused by the magnitude of habitat heterogeneity being too small to induce strong aggregations within a suitable habitat.…”

Section: Dipterocarpus Cornutussupporting

confidence: 82%

“…The phases assumed an increase in basal area and decrease in stem number over time after gap formation. The ratio in each 20 9 20-m subplot was divided into four quartile groups, from 1 (shortly after gap formation) to 4 (mature forest) (for details, see Debski et al 2002).…”

Section: Study Sitementioning

confidence: 99%

“…Six topographic types (valley, flatland, low slope, mid-slope, high slope, and ridgetop) and four soil types (lateritic, shale, well-drained alluvial, and imperfectly drained alluvial soils) were assigned to each 10 9 10-m subplot prior to the initial census (for details, see Okuda et al 2004). We also used a relative index of forest regeneration phase after gap formation that was constructed by Debski et al (2002) using the ratio of basal area to stem number in 20 9 20-m subplots. The phases assumed an increase in basal area and decrease in stem number over time after gap formation.…”

Section: Study Sitementioning

confidence: 99%

“…A potential problem is that spatial patterns are particularly influenced by patterns of seed dispersal (Vandorp et al 1996;Ehrlen and Eriksson 2000;Seidler and Plotkin 2006) and habitat associations (Tuomisto and Ruokolainen 1993;Clark et al 1998;Davies et al 1998;Niiyama et al 1999;Svenning 1999;Webb and Peart 2000;Harms et al 2001;Debski et al 2002;Valencia et al 2004;Russo et al 2005), and these different factors can potentially generate the same aggregated patterns of plants (Schurr et al 2004). Statistical analyses of the patterns and scale of spatial distributions should be very useful for identifying the factors determining the spatial patterns, such as intra-and interspecific interactions, environmental heterogeneity, and seed dispersal (Sterner et al 1986;Pelissier 1998;Barrot et al 1999;Dale 1999;Cole and Syms 1999;Dovčiak et al 2001;Suzuki et al 2003Suzuki et al , 2005.…”

Section: Introductionmentioning

confidence: 97%

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Growth strategies differentiate the spatial patterns of 11 dipterocarp species coexisting in a Malaysian tropical rain forest

et al. 2008

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We examined relationships between mortality rate, relative growth rate (RGR), and spatial patterns of three growth stages (small, medium, and large trees) for 11 dipterocarp species in the Pasoh 50-ha plot. Mortality rates for these species tended to be positively correlated with RGRs, although the correlation was significant only at the small-tree stage. Seven species with high growth and mortality rates exhibited peaks in spatial aggregation at small distances (<100 m) in small trees, but this aggregation disappeared in medium and large trees. In contrast, the other four species with low growth and mortality rates aggregated at large distances (>200 m) throughout the three growth stages in all but one species. Negative associations between different growth stages were observed only for the high-mortality species, suggesting density-dependent mortality. The high-mortality species showed habitat associations with topography, soil type, and the forest regeneration phase after gap formation, whereas the three low-mortality species only had associations with the forest regeneration phase. A randomization procedure revealed that these habitat associations explained little of their spatial aggregation. Our results suggest that the growth strategy has a large effect on the structuring of the spatial distribution of tree species through mortality processes.

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Section: Dipterocarpus Cornutussupporting

confidence: 82%

Section: Study Sitementioning

confidence: 99%

Section: Study Sitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Growth strategies differentiate the spatial patterns of 11 dipterocarp species coexisting in a Malaysian tropical rain forest

et al. 2008

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“…the tree species composition on upper slopes and ridges can differ considerably from the tree species composition in swamps, river valleys and on lower slopes (Basnet 1992;Newbery et al 1996;Niiyama et al 1999;Rennolls and Laumonier 2000;Cox et al 2002;Debski et al 2002;Gibbons and Newbery 2002). This could mean that the tree species diversity that is preserved in swamps, river valleys and lower slopes after fire only represents a part of the total tree species composition that was present in the forest before the fires.…”

Section: Topographic Patterns In Tree Species Diversitymentioning

confidence: 95%

Fire survival of lowland tropical rain forest trees in relation to stem diameter and topographic position

Slik

Eichhorn

2003

Oecologia

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The objective of this study was to relate patterns in forest structure, tree species diversity, and tree species composition to stem diameters and topography in unburned, once burned and twice burned lowland dipterocarp rain forests in East Kalimantan, Indonesia. To do this four unburned old growth forests were compared with three forests that burned once (1997/1998) and three forests that burned twice (1982/1983 and 1997/1998). Fire resulted in a strong reduction of climax tree density which was negatively related to tree diameter. However, a disproportionate reduction in small diameter understorey climax tree species occurred only after repeated fires. Climax tree species in both burned forest types were most common in swamps, river valleys and on lower slopes, while their density was much lower on places higher along hillsides. In unburned forest the opposite was observed, with climax tree density increasing steadily from swamp and river valleys to upper slopes and ridges. In contrast to climax trees, pioneer trees were abundant throughout the burned forest, with highest numbers on hill sides and ridges. Our results indicate that both diameter and topographic position of trees strongly affect their fire survival chances in tropical lowland forests.

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Improving the usability of spatial point process methodology: an interdisciplinary dialogue between statistics and ecology

Illian

Burslem

2017

AStA Adv Stat Anal

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The last few decades have seen an increasing interest and strong development in spatial point process methodology, and associated software that facilitates model fitting has become available. A lot of this progress has made these approaches more accessible to users, through freely available software. However, in the ecological user community the methodology has only been slowly picked up despite its obvious relevance to the field. This paper reflects on this development, highlighting mutual benefits of interdisciplinary dialogue for both statistics and ecology. We detail the contribution point process methodology has made to research on biodiversity theory as a result of this dialogue and reflect on reasons for the slow take-up of the methodology. This primarily concerns the current lack of consideration of the usability of the approaches, which we discuss in detail, presenting current discussions as well as indicating future directions.

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Habitat Preferences of Aporosa in Two Malaysian Forests: Implications for Abundance and Coexistence

Cited by 33 publications

References 0 publications

Growth strategies differentiate the spatial patterns of 11 dipterocarp species coexisting in a Malaysian tropical rain forest

Growth strategies differentiate the spatial patterns of 11 dipterocarp species coexisting in a Malaysian tropical rain forest

Fire survival of lowland tropical rain forest trees in relation to stem diameter and topographic position

Improving the usability of spatial point process methodology: an interdisciplinary dialogue between statistics and ecology

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