The effects of belowground resources on aboveground allometric growth in Bornean tree species

Heineman, Katherine D.; Jensen, Ethan; Shapland, Autumn; Bogenrief, Brett; Tan, Sylvester; Rebarber, Richard; Russo, Sabrina E.

doi:10.1016/j.foreco.2011.02.005

Cited by 32 publications

(23 citation statements)

References 77 publications

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“…These patterns suggest that competitive dynamics among juvenile trees may be dominated more by soil resource availability at the resource-poor end of this edaphic gradient and by understorey irradiance at the other end, as would be predicted by Tilman (1988). Faster predicted tree height growth, based on empirically parameterized allometric growth models, of tree species specializing on the clay soil, relative to sandy loam specialists, is consistent with this hypothesis (Heineman et al 2011).…”

Section: Causes and Consequences Of Soil-related Variation In Light Rsupporting

confidence: 56%

Covariation between understorey light environments and soil resources in Bornean mixed dipterocarp rain forest

2011

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Variation in understorey irradiance is both a cause and consequence of the structure and dynamics of closed-canopy forests, which are also influenced by soil nutrients and water availability. We tested the hypothesis that understorey light regimes differ among four mixed dipterocarp forest types that share the same rainfall, but grow on different soils along an edaphic gradient at one site in Borneo. Based on data from photosynthetically active radiation sensors deployed at 1-m height at 36 locations for 351 sensor-days, we found significant soil-related variation in irradiance. The more productive forest types on clay and fine loam had lower daily photosynthetic photon flux density (PPFD) than those on the more nutrient-depleted and better-drained sandy loam and loam. They also had fewer moderate to high-intensity sunflecks, and a greater proportion of their daily PPFD came from low-intensity light. Understorey irradiance did not, however, monotonically decline with increasing soil resources. Forests on intermediate soils had greater irradiance than those with more and less soil resources, due to steeper slopes. Plant communities arrayed on resource gradients are commonly used to test hypotheses of environmental factors driving their assembly. Our results indicate that consideration of multiple resource dimensions in such tests is critical.

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Section: Causes and Consequences Of Soil-related Variation In Light Rsupporting

confidence: 56%

Covariation between understorey light environments and soil resources in Bornean mixed dipterocarp rain forest

2011

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“…Wood density was determined for the most common species based on locally measured wood density of 11 tree species [ King et al ., ] and five tree species of soil specialists and generalists [ Heineman et al ., ], all of which were assessed at the Lambir site. In addition, other values of wood density measured in this region (Borneo and West Malaysia) were included: 12 species from Kuala Belalong, Brunei [ Osunkoya et al ., ]; four species from East Kalimantan, Indonesia [ Basuki et al ., ]; 70 species from West Kalimantan, Indonesia [ Suzuki , ]; three species from the Pasoh Forest Reserve, Peninsular Malaysia [ King et al ., ]; and three species from secondary forest near Lambir [ Kenzo et al ., ].…”

Section: Methodsmentioning

confidence: 99%

Annual budget and seasonal variation of aboveground and belowground net primary productivity in a lowland dipterocarp forest in Borneo

2013

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[1] Tropical forests are thought to have among the highest values of net primary productivity (NPP) on Earth, but comprehensive data on NPP have rarely been collected for tropical forests, especially outside of the Neotropics. In this study, we quantify aboveground and belowground NPP, along with additional environmental factors over a 1-2 year period in a lowland dipterocarp forest in Borneo. The site is characterized by high annual rainfall and typically no month of the year when the forest is under water stress. We estimated the total NPP to be 15.89 ± 0.90 Mg C ha À1 yr À1 (mean ± standard error) for a forest plot on clay soils and 12.79 ± 0.68 Mg C ha À1 yr À1 for a forest plot on sandy loam soils. Of this productivity, the allocation to aboveground NPP is 81.8 ± 6.0%/80.4 ± 6.0% and to belowground NPP is 18.2 ± 3.7%/19.6 ± 2.6% on clay and sandy loam, respectively. Fine root productivity (NPP fine roots ) shows stronger seasonal variation relative to other components of NPP. There is evidence suggesting interannual variation in NPP fine roots , leaf flush, NPP litterfall , and NPP ACW . This is the first attempt to describe how the biomass of a Bornean tropical forest is allocated to the various components of NPP over the seasonal cycle. The study highlights the marked seasonality of a tropical forest even under largely aseasonal environmental conditions, as well as the important effect of contrasting seasonality on different soil types.Citation: Kho, L. K., Y. Malhi, and S. K. S. Tan (2013), Annual budget and seasonal variation of aboveground and belowground net primary productivity in a lowland dipterocarp forest in Borneo,

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“…For instance, on ridges and steep slopes, strong competition for nutrients and water favours species with life‐history traits geared towards maximising survival (Paoli ; Heineman et al . ; Holdaway et al . ).…”

Section: Introductionmentioning

confidence: 99%

“…As such, they directly constrain the conditions within which trees grow, driving environmental filtering, controlling species' demographic rates (Baltzer et al 2005;Russo et al 2008;Anderse et al 2014), and ultimately shaping the structure and composition of forest patches (Werner & Homeier 2015). For instance, on ridges and steep slopes, strong competition for nutrients and water favours species with life-history traits geared towards maximising survival (Paoli 2006;Heineman et al 2011;Holdaway et al 2011). By contrast, forests in alluvial valleys are moulded by fierce competition for light, and generally develop taller, vertically stratified canopies (Paoli et al 2008;Banin et al 2012;Werner & Homeier 2015), while also maintaining higher productivity and turnover rates (Aiba et al 2005;Stephenson et al 2005;Quesada et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Topography shapes the structure, composition and function of tropical forest landscapes

et al. 2018

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Topography is a key driver of tropical forest structure and composition, as it constrains local nutrient and hydraulic conditions within which trees grow. Yet, we do not fully understand how changes in forest physiognomy driven by topography impact other emergent properties of forests, such as their aboveground carbon density (ACD). Working in Borneo - at a site where 70-m-tall forests in alluvial valleys rapidly transition to stunted heath forests on nutrient-depleted dip slopes - we combined field data with airborne laser scanning and hyperspectral imaging to characterise how topography shapes the vertical structure, wood density, diversity and ACD of nearly 15 km of old-growth forest. We found that subtle differences in elevation - which control soil chemistry and hydrology - profoundly influenced the structure, composition and diversity of the canopy. Capturing these processes was critical to explaining landscape-scale heterogeneity in ACD, highlighting how emerging remote sensing technologies can provide new insights into long-standing ecological questions.

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The effects of belowground resources on aboveground allometric growth in Bornean tree species

Cited by 32 publications

References 77 publications

Covariation between understorey light environments and soil resources in Bornean mixed dipterocarp rain forest

Covariation between understorey light environments and soil resources in Bornean mixed dipterocarp rain forest

Annual budget and seasonal variation of aboveground and belowground net primary productivity in a lowland dipterocarp forest in Borneo

Topography shapes the structure, composition and function of tropical forest landscapes

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