Site characteristics and the distribution of tree species in Mixed Dipterocarp Forest on Tertiary sediments in central Sarawak, Malaysia

Baillie, Ian; Ashton, Peter S.; Court, M. N.; Anderson, James A.; Fitzpatrick, E. A.; Tinsley, J.

doi:10.1017/s0266467400002078

Cited by 150 publications

(151 citation statements)

References 18 publications

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“…The decay model using individuals that occur in two or more plots in this analysis decreased significantly with distance, and the distance decay was similar to that demonstrated by Condit et al (2002) using all individuals of trees from Yasuni (Ecuador) and Manu (Peru), by Duque et al (2009) using all individuals of trees from the Colombian Amazonia and by Tuomisto et al (2003a) using specific taxa (Pteridophytes and Melastomataceae) in western Amazonia. Our results are consistent with a significant role for dispersal limitation, a key process that determines species turnover in space under neutral models (Hubbell, 2001;Condit et al, 2002;Duque et al, 2009). However, the comparisons here also emphasise that very dissimilar forests can also occur nearby, and that floristically General soil classification following Malhi et al (2004), a Quesada et al (2009b), b Pitman et al (2008) similar pairs of plots can be found much further away.…”

Section: Is Regional-and Continental-scale Variation In Floristic Comsupporting

confidence: 68%

“…Denslow et al, 1987) and are associated with floristic patterns and habitat preferences in Asian tropical forests (e.g. Baillie et al, 1987;Paoli et al, 2006). However, where concentrations of soil cations are low, the concentrations of aluminium may also be important: low concentrations of Mg and Ca are associated with very high aluminium contents in Amazonian soils (Quesada et al, 2009a).…”

Section: Is Regional-and Continental-scale Variation In Floristic Commentioning

confidence: 99%

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Multi-scale comparisons of tree composition in Amazonian terra firme forests

et al. 2009

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Abstract. We explored the floristic composition of terra firme forests across Amazonia using 55 plots. Firstly, we examined the floristic patterns using both genus-and specieslevel data and found that the species-level analysis more clearly distinguishes among forests. Next, we compared the variation in plot floristic composition at regional-and continental-scales, and found that average among-pair floristic similarity and its decay with distance behave similarly at regional-and continental-scales. Nevertheless, geographical distance had different effects on floristic similarity within regions at distances <100 km, where north-western and southwestern Amazonian regions showed greater floristic variation than plots of central and eastern Amazonia. Finally, we quantified the role of environmental factors and geographical distance for determining variation in floristic composition.

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Section: Is Regional-and Continental-scale Variation In Floristic Comsupporting

confidence: 68%

Section: Is Regional-and Continental-scale Variation In Floristic Commentioning

confidence: 99%

Multi-scale comparisons of tree composition in Amazonian terra firme forests

et al. 2009

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“…Unlike cation concentration and soil texture, which seem to be widely important in influencing floristic patterns in tropical forests, the role of soil pH may be limited to certain regions or taxa. Soil pH has been found to have significant relationships with floristics in some tropical forests (Baillie 1987;Hall et al 2004;Jones et al 2006) but is unimportant in others (Paoli et al 2006;Ruokolainen & Tuomisto 1998;Tuomisto et al 2003a), including the Ducke Reserve in central Amazonia (Costa et al 2005). Higher species abundances on soils of low pH might be expected due to the evolutionary origin of Amazonian flora of soils of low pH (Partel 2002).…”

Section: Important Environmental Variables For Species Abundancesmentioning

confidence: 99%

Importance of soils, topography and geographic distance in structuring central Amazonian tree communities

Bohlman

Laurance

et al. 2008

J Vegetation Science

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Question: What is the relative contribution of geographic distance, soil and topographic variables in determining the community floristic patterns and individual tree species abundances in the nutrient-poor soils of central Amazonia? Location: Central Amazonia near Manaus, Brazil. Methods: Our analysis was based on data for 1105 tree species (> 10 cm dbh) within 40 1-ha plots over a ca. 1000-km 2 area. Slope and 26 soil-surface parameters were measured for each plot. A main soil-fertility gradient (encompassing soil texture, cation content, nitrogen and carbon) and five other uncorrelated soil and topographic variables were used as potential predictors of plant-community composition. Mantel tests and multiple regressions on distance matrices were used to detect relationships at the community level, and ordinary least square (OLS) and conditional autoregressive (CAR) models were used to detect relationships for individual species abundances. Results: Floristic similarity declined rapidly with distance over small spatial scales (0-5 km), but remained constant (ca. 44%) over distances of 5 to 30 km, which indicates lower beta diversity than in western Amazonian forests. Distance explained 1/3 to 1/2 more variance in floristics measures than environmental variables. Community composition was most strongly related to the main soil-fertility gradient and C:N ratio. The main fertility gradient and pH had the greatest impact of species abundances. About 30% of individual tree species were significantly related to one or more soil/topographic parameters. Conclusions: Geographic distance and the main fertility gradient are the best predictors of community floristic composition, but other soil variables, particularly C:N ratio, pH, and slope, have strong relationships with a significant portion of the tree community.

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“…The clearest evidence for the effects of habitat and soil factors on species distributions comes from studies conducted at mesoscales (Ϸ1-100 km 2 ) (17, 18) and landscape scales (10 2 to 10 4 km 2 ) (19)(20)(21)(22)(23)(24). At these scales, tropical forest landscapes are a mosaic of edaphic types (25,26), with levels of heterogeneity and spatial segregation that allow the effects of dispersal and habitat factors on species distributions and community structure to be relatively easily quantified.…”

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confidence: 99%

Soil nutrients influence spatial distributions of tropical tree species

John

Dalling

Harms

et al. 2007

Proc. Natl. Acad. Sci. U.S.A.

823

862

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The importance of niche vs. neutral assembly mechanisms in structuring tropical tree communities remains an important unsettled question in community ecology [Bell G (2005) Ecology 86:1757-1770]. There is ample evidence that species distributions are determined by soils and habitat factors at landscape (<10 4 km 2 ) and regional scales. At local scales (<1 km 2 ), however, habitat factors and species distributions show comparable spatial aggregation, making it difficult to disentangle the importance of niche and dispersal processes. In this article, we test soil resource-based niche assembly at a local scale, using species and soil nutrient distributions obtained at high spatial resolution in three diverse neotropical forest plots in Colombia (La Planada), Ecuador (Yasuni), and Panama (Barro Colorado Island). Using spatial distribution maps of >0.5 million individual trees of 1,400 species and 10 essential plant nutrients, we used Monte Carlo simulations of species distributions to test plant-soil associations against null expectations based on dispersal assembly. We found that the spatial distributions of 36 -51% of tree species at these sites show strong associations to soil nutrient distributions. Neutral dispersal assembly cannot account for these plant-soil associations or the observed niche breadths of these species. These results indicate that belowground resource availability plays an important role in the assembly of tropical tree communities at local scales and provide the basis for future investigations on the mechanisms of resource competition among tropical tree species.community assembly ͉ niche differentiation ͉ tropical forest T he high local diversity of tropical tree communities poses a unique challenge for testing niche assembly theories based on resource competition (1). In these species-rich communities, hundreds of tree species can coexist in a single site (2), which renders assessment of the outcome of pairwise competitive interactions intractable. Conversely, the high diversity and relative rarity of most species also means that species seldom encounter each other in ecological neighborhood interactions (3), which suggests that competitive differences among species might not have a predictable effect on community structure. In fact, neutral theories of community assembly assume that there are no competitive differences among species and that ecological communities are assembled by random dispersal. Under neutral community assembly, alpha diversity would be governed by metacommunity diversity and speciation-extinction at macroecological scales (4, 5).Despite the contrasting mechanisms of community assembly proposed by neutral and niche theories, several lines of evidence support each of these perspectives. Tropical tree species differ in their light requirements for regeneration (6) because of a tradeoff between growth rate under high light and survival in the shade (7-9). Seedlings and saplings of different species differ in their resistance to pests, resulting in a frequency-dependent a...

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Site characteristics and the distribution of tree species in Mixed Dipterocarp Forest on Tertiary sediments in central Sarawak, Malaysia

Cited by 150 publications

References 18 publications

Multi-scale comparisons of tree composition in Amazonian terra firme forests

Multi-scale comparisons of tree composition in Amazonian terra firme forests

Importance of soils, topography and geographic distance in structuring central Amazonian tree communities

Soil nutrients influence spatial distributions of tropical tree species

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