A crown model for simulating long-term stand and gap dynamics in northern hardwood forests

Choi, Jungkee; Lorimer, Craig G.; Vanderwerker, Jayne M.; Cole, William G.; Martin, George L.

doi:10.1016/s0378-1127(00)00606-x

Cited by 35 publications

(38 citation statements)

References 34 publications

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“…The present study indicates that only a small proportion of the variation in volume growth could be explained using light (1-14%) or distance from the stand edge (1-18%) by themselves (Table 4, models 1, 2, 11, 12, 21, 22, 31, and 32). However, numerous studies show that seedling growth prediction is dependant on both light levels and the initial size of the tree (where initial size varies) (Hatch et al, 1975;Givnish, 1988;Cole and Lorimer, 1994;Biging and Dobbertin, 1995;Choi et al, 2001;Claveau et al, 2002;Comeau et al, 2003;Webster and Lorimer, 2003;Pritchard, 2003). In this Fig.…”

Section: Spruce Growthmentioning

confidence: 99%

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Microclimatic and spruce growth gradients adjacent to young aspen stands

Voicu

Comeau

2006

Forest Ecology and Management

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Section: Spruce Growthmentioning

confidence: 99%

“…A number of studies also indicate that the size of the tree or the tree crown influences growth rates (Hatch et al, 1975;Givnish, 1988;Cole and Lorimer, 1994;Biging and Dobbertin, 1995;Choi et al, 2001;Claveau et al, 2002;Comeau et al, 2003;Webster and Lorimer, 2003;Pritchard, 2003) since size reflects the leaf area of the tree.…”

Section: Introductionmentioning

confidence: 99%

Microclimatic and spruce growth gradients adjacent to young aspen stands

Voicu

Comeau

2006

Forest Ecology and Management

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“…O modelo composto descreve o incremento em função de variáveis de atributo da árvore como a morfometria da copa, espaço de crescimento e disponibilidade de luz solar. Essas variáveis são consideradas ponto de partida para a descrição matemática do crescimento de árvores (Wykoff 1990;Choi et al 2001). Por outro lado, o modelo potencial/ modificado considera que o crescimento de uma árvore é o resultado do produto de seu crescimento potencial com uma porção reduzida do crescimento denominada de função modificada (Holdaway 1984).…”

Section: Introductionunclassified

Competição assimétrica e o incremento diamétrico de árvores individuais de Cedrela odorata L. na Amazônia ocidental

Cunha

Finger

2013

Acta Amaz.

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RESUMOUm modelo de crescimento dependente e independente da distância foi ajustado para avaliar como variáveis de competição explicam a variação do crescimento periódico em diâmetro de 132 árvores de cedro (Cedrela odorata). Utilizando a abordagem de crescimento potencial relativo (PRI), estimou-se o incremento relativo em diâmetro (IRd) a partir do produto do crescimento máximo em diâmetro (incremento potencial) e da função modificada (porção do crescimento reduzido). A significância do modelo do crescimento reduzido ajustado demonstrou influência da competição assimétrica sobre o crescimento em diâmetro, explicando 71% do total da variação e também revelou que a resposta à competição não foi constante, mas variou entre as diferentes classes de tamanho dos indivíduos arbóreos. PalavRaS-chavE: incremento periódico em diâmetro; índices de morfometria; índices de competição. Asymmetric competition and the diameter increment of Cedrela odorata L. trees in western Amazonia.aBSTRacT A dependent and independent growth distance model was fitted to evaluate how competition variables may account for the variation of periodic diameter increment of 132 Cedrela odorata trees. Using a Potential Relative Increment (PRI), the relative diameter increment (IRd) was estimated from the multiplication of maximum diameter growth (potential increment) by modified function (portion of the reduced growth due to competition by light and growth space). The significance of the reduced fitted model demonstrated the influence of asymmetric competition variables on diameter growth, explaining 71% of the total variation as well as indicated that competition responses were not constant, but it varied among the different size classes of trees.

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“…First, by removing the largest trees, selection management reduces the average width of tree crowns, and thus the average size of gaps in subsequent harvests (Crow et al, 2002). Second, by removing the largest and oldest trees, selection management retains smaller and younger trees that are capable of faster lateral branch extension and gap closure (Choi et al, 2001). Together, these changes in the size and age structure of selection-managed stands are thought to limit the gap-phase recruitment of light-demanding species by reducing the frequency of high-light gaps.…”

Section: Implications For Managementmentioning

confidence: 99%