Stump diameter and DBH relationships for white oak and black oak in the Lower Peninsula of Michigan

We introduce a novel methodology for measuring stand sapwood area (SA), which provides a useful indicator of evapotranspiration from forest stands. The method is demonstrated in a 73‐year‐old Eucalyptus regnans forest comprising 784 stems over a 5 ha area. We used photos of stump cross‐sections to differentiate sapwood from heartwood and found 90% of stump segments to have a visible transition boundary. The digital images were corrected for lens distortion and scaled to an actual cross‐sectional area, with resulting stump perimeters corresponding well with field‐measured perimeters traced using string (root‐mean‐square error = 4 cm, R2 = 0.99). Calculated SA and basal area (BA) at stump height were coupled with tree and sapwood taper data to predict the SA:BA ratio at 1.3 m height (italicRtrue^1.3). Tree taper data were coupled with stump dimensions data in a mixed‐effects model to predict each stump's BA at 1.3 m, and sapwood taper data from buttress logs were used to improve each stems italicRtrue^1.3. Using this procedure, we found our study site to have an italicRtrue^1.3 of 0.21 and total stand SA at 1.3 m height of 9.3 m2 ha−1. We quantified the bias in traditional italicRtrue^1.3 estimates that use cores to measure sapwood thickness and diameter tape to calculate SA. We show traditional methods underestimate italicRtrue^1.3 that increases with tree diameter and decreases with stem circularity, whereas our methodology gave more accurate measures of SA in large buttressing trees. Our methodology also provides a more efficient way of generating maps of SA variation across large forested catchments. Copyright © 2014 John Wiley & Sons, Ltd.

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“…Ojasvi et al . (), Corral‐Rivas et al . () and Westfall () all predicted diameter at 1.3 m from stump dimensions and tree taper data.…”

Section: Methodsmentioning

confidence: 98%

“…For this purpose, stump dimensions, tree taper and sapwood taper data were collected. Ojasvi et al (1991), Corral-Rivas et al (2007) and Westfall (2010) all predicted diameter at 1.3 m from stump dimensions and tree taper data.…”

Section: Correspondence Between Visible and Functional Sapwoodmentioning

confidence: 99%

A new method for measuring stand sapwood area in forests

et al. 2014

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“…As a result, universal relation ships are not likely to exist between stump and stem diameters. Nevertheless, others have shown general equations to perform reason ably well (Ojasvi and Bruggink 1991), al though the greatest accuracy is typically achieved with species-and site-specific mod els. Bylin (1982) found the simple linear re gression, as applied in this study, performed as well as more complex multivariate models for 15 different tree species.…”

Section: Discussionmentioning

confidence: 99%

Reconstruction of Tertiary Metasequoia forests. I. Test of a method for biomass determination based on stem dimensions

et al. 2003

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Accurate reconstruction of the biomass, structure, and productivity of ancient forests from their fossilized remnants remains an interesting challenge in paleoecology. In well-preserved Tertiary fossil Metasequoia forests of Canada's Arctic, in situ stumps and fragments of stems, treetops, and branches contain substantial information about tree dimensions that can be used to de termine tree height, stand biomass, and other characteristics such as canopy depth and structure, and the history of stand development. To validate a method for reconstructing the biomass of the Eocene floodplain Metasequoia forests of Axel Heiberg Island, we measured stump diameters and spacing, and stem, branch, and treetop characteristics in living Metasequoia glyptostroboides and Chamaccyparis thyoides stands in ways that simulate the limited measurements that can be made in wellpreserved fossil forests in Canada and probably elsewhere. We used those limited measurements to estimate tree height and volume, branch and foliar dry weights, and tree biomass. The estimates derived from the limited data set are usually within 15% of the estimates derived from the methods currently used in forest ecology for determining those metrics in modern forests. Under appro priate conditions, the biomass of ancient forests can be estimated with reasonable confidence.

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“…Para todas as relações dendrométricas estudadas foram utilizados modelos criados e ajustados pelo software Table Curve 2D, bem como modelos clássicos encontrados para essas relações apresentados em trabalhos como o de Dolph (1989), Johnson & Weigel (1990), Ojasvi et al (1991), entre outros.…”

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“…Figura 2. Linhas estimativas sobre os dados observados e gráficos dos resíduos para relação dap cc /d t e dap sc /d t Ojasvi et al (1991) desenvolveram modelos geométricos e de regressão linear multivariada para estimar o DAP de Quercus alba e Quercus nigra na Península Baixa de Michigan, EUA. A primeira classe de modelos não considerava a altura do toco, a segunda considerava as alturas do toco de 15 cm e 30 cm acima do solo.…”

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Relações dendrométricas de Araucaria angustifolia

Nascimento¹,

Machado²,

Figueiredo³

et al. 2010

Pesq. Flor. Bras.

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Resumo -Esta pesquisa teve como objetivo estudar as relações entre o DAP e as variáveis diâmetro de copa, diâmetro de toco e o diâmetro à altura do peito sem casca de Araucaria angustifólia (Bert.) O. Kuntze. Os dados das variáveis mencionadas provieram de 162 pinheiros distribuídos em toda amplitude diamétrica de um fragmento de Floresta Ombrófila Mista com 15,24 hectares, situado na região urbana de Curitiba, Paraná. Todas as relações testadas resultaram em equações preditivas com bons valores para o Índice de Schlaegel, Syx % , valor de F e valor de ρ para os coeficientes, bem como bom desempenho na análise gráfica dos resíduos.Termos para indexação: Diâmetro de copa, diâmetro de toco, equações preditivas.

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Stump diameter and DBH relationships for white oak and black oak in the Lower Peninsula of Michigan

Cited by 7 publications

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A new method for measuring stand sapwood area in forests

A new method for measuring stand sapwood area in forests

Reconstruction of Tertiary Metasequoia forests. I. Test of a method for biomass determination based on stem dimensions

Relações dendrométricas de Araucaria angustifolia

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