Size-Structured Tree Populations in Gap-Dynamic Forest--The Forest Architecture Hypothesis for the Stable Coexistence of Species

1993 ◽  
Vol 81 (1) ◽  
pp. 131 ◽  
Author(s):  
Takashi Kohyama
2021 ◽  
Author(s):  
Ruth‐Anne Sandaa ◽  
Marius R. Saltvedt ◽  
Håkon Dahle ◽  
Haina Wang ◽  
Selina Våge ◽  
...  

2016 ◽  
Vol 15 (9) ◽  
pp. 995-1002 ◽  
Author(s):  
Maria Losurdo ◽  
Alexandra Suvorova ◽  
Sergey Rubanov ◽  
Kurt Hingerl ◽  
April S. Brown

Author(s):  
André M. de Roos ◽  
Lennart Persson

This chapter considers how stage structure and ontogenetic niche shifts may affect the coexistence between two consumer species competing for two resources in the absence and presence of predators, and how ontogenetic niche shifts may give rise to alternative stable states. More specifically, the analysis will use techniques developed within the consumer-resource framework of Tilman (1982), including consumption and renewal vectors (Schellekens, de Roos, and Persson 2010). Tilman showed that stable coexistence between consumers feeding on the same two resources is possible if each consumer species feeds proportionally more on the resource that limits its own growth most. Stable coexistence is, however, also affected by the form of resource-dependent growth isoclines, which represent combinations of resource densities that lead to equal population growth of consumers. It is shown that ontogenetic niche shifts per se affect the form of resource-dependent growth isoclines, which in turn may lead to coexistence through niche partitioning. The chapter also discusses how predation may promote the performance of a species undergoing ontogenetic niche shifts even in the case where it is both the inferior competitor and the preferred prey of the predator.


2004 ◽  
Vol 80 (4) ◽  
pp. 473-477 ◽  
Author(s):  
Paul Watson ◽  
Simon Potter

Fires play an integral part in Canadian forest architecture. Low-value wood, from burned stems, is an important source of fibre for the pulp and paper industry. Although wood chemistry changes induced by fire are substantial, burned stems exhibit a demarcation layer between the char and undamaged wood which is only a few cells thick. The loss of stem moisture content requires that burned wood is processed within one year. Aggressive debarking will minimize charcoal contamination and careful metering of chips from burned wood into any pulping process is essential. Chips with low moisture content must be pre-steamed prior to kraft cooking, and chemical pre-treatment may improve mechanical pulp quality. Key words: burn intensity, wood chemistry, charring, stem moisture content, charcoal contamination, chip metering


2018 ◽  
Author(s):  
V. Gonharenko ◽  
Dmitry Pokrovsky ◽  
Shapoval Alexander
Keyword(s):  

2005 ◽  
Vol 42 (1) ◽  
pp. 70-79 ◽  
Author(s):  
YVONNE M. BUCKLEY ◽  
MARK REES ◽  
ANDREW W. SHEPPARD ◽  
MATTHEW J. SMYTH

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