Proceedings of the Southern Containerized Forest Tree Seedling Conference

1982 ◽  
Author(s):  
Richard W. Guldin ◽  
James P. Barnett ◽  
[Editors]
Keyword(s):  
Forest Tree ◽  
Tree Seedling

Irradiance and Spectral Quality Affect Asian Tropical Rain Forest Tree Seedling Development

Ecology ◽  
1995 ◽  
Vol 77 (2) ◽  
pp. 568-580 ◽  
Author(s):  
David W. Lee ◽  
Krishnapillay Baskaran ◽  
Marzalina Mansor ◽  
Haris Mohamad ◽  
Son Kheong Yap
Keyword(s):  
Rain Forest ◽  
Tropical Rain Forest ◽  
Forest Tree ◽  
Seedling Development ◽  
Spectral Quality ◽  
Tree Seedling

The interactive effects of surface-burn severity and canopy cover on conifer and broadleaf tree seedling ecophysiology

2014 ◽  
Vol 44 (9) ◽  
pp. 1032-1041 ◽  
Author(s):  
Sheel Bansal ◽  
Till Jochum ◽  
David A. Wardle ◽  
Marie-Charlotte Nilsson
Keyword(s):  
Boreal Forest ◽  
Prescribed Burning ◽  
Fire Severity ◽  
Canopy Structure ◽  
Forest Tree ◽  
Interactive Effects ◽  
Burn Severity ◽  
Tree Seedling ◽  
Clear Cutting ◽  
Surface Burn

Fire has an important role for regeneration of many boreal forest tree species, and this includes both wildfire and prescribed burning following clear-cutting. Depending on the severity, fire can have a variety of effects on above- and below-ground properties that impact tree seedling establishment. Very little is known about the impacts of ground fire severity on post-fire seedling performance, or how the effects of fire severity interact with those of canopy structure. We conducted a full-factorial experiment that manipulated surface-burn severity (no burn; light, medium, or heavy burn; or scarification) and canopy (closed forest or open clear-cut) to reveal their interactive effects on ecophysiological traits of establishing broadleaf and conifer seedlings in a Swedish boreal forest. Medium and heavy surface burns increased seedling growth, photosynthesis, respiration, and foliar N and P concentrations, and these effects were most apparent in open clear-cuts. Growth rates of all species responded similarly to surface-burn treatments, although photosynthesis, foliar P, and specific leaf area were more responsive to burning treatments for broadleaf species than for conifers. Our study demonstrates that the positive impacts of fire on tree seedling physiology are dependent on a minimum severity threshold and are more effective when combined with clear-cutting.

scholarly journals Nutrient deposition enhances post-fire survival in non-N-fixing savanna tree seedlings

2018 ◽  
Author(s):  
Varun Varma ◽  
Mahesh Sankaran
Keyword(s):  
Community Composition ◽  
Seedling Growth ◽  
Growth Rates ◽  
Seedling Survival ◽  
Tropical Dry Forest ◽  
Forest Tree ◽  
Dry Forest ◽  
Tree Seedlings ◽  
Tree Seedling ◽  
Nutrient Deposition

AbstractNutrient deposition can modify plant growth rates and potentially alter the susceptibility of plants to disturbance events, while also influencing properties of disturbance regimes. In mixed tree-grass ecosystems, such as savannas and tropical dry forests, tree seedling growth rates strongly influence the ability of seedlings to survive fire (i.e. post-fire seedling survival), and hence, vegetation structure and tree community composition. However the effects of nutrient deposition on the susceptibility of recruiting trees to fire are poorly quantified. In a field experiment, seedlings of multiple N-fixing and non-N-fixing tropical dry forest tree species were exposed to nitrogen (N) and phosphorus (P) fertilisation, and fire. We quantified nutrient-mediated changes in a) mean seedling growth rates; b) growth rates of the fastest growing individuals and c) post-fire seedling survival. N-fixers had substantially higher baseline post-fire seedling survival, that was unaffected by nutrient addition. Fertilisation, especially with N, increased post-fire survival probabilities in non-N-fixers by increasing the growth rates of the fastest growing individuals. These results suggest that fertilisation can lead to an increase in the relative abundance of non-N-fixers in the resprout community, and thereby, alter the community composition of tropical savanna and dry forest tree communities in the long-term.

The economics of containerized forest tree seedling research in the United States

1986 ◽  
Vol 16 (5) ◽  
pp. 1007-1012 ◽  
Author(s):  
Robert A. Westgate
Keyword(s):  
The United States ◽  
Forest Tree ◽  
Economic Benefits ◽  
Background Information ◽  
Tree Seedlings ◽  
Tree Seedling ◽  
Public And Private ◽  
Economic Surplus ◽  
Future Production ◽  
Bare Root

There is extensive evidence that research has a significant effect on increases in productivity, which in turn has a positive effect on economic growth and development. This study examines the economic impacts of research that led to a forestry innovation, containerized forest tree seedlings. Economic benefits resulting from the development of this method of reforestation are attributable to numerous sources, although only benefits measurable in terms of savings to consumers are considered in this analysis to ensure a conservative estimate of benefits. An economic surplus model is utilized to estimate research benefits. Public and private research expenditures are estimated using screened publication counts and by contacting firms who have undertaken or who are conducting containerized seedling research. Average internal rates of return from investment in containerized seedling research range from 37 to 111%, depending on assumptions concerning the percentage price differential between containerized and bare-root seedlings, and research cost estimates. A sensitivity analysis shows that the rate of return is insensitive to estimates of future production. Results from research evaluations such as this can supply background information for decision making, provide support for decisions already made (or provide impetus for changing decisions), and give verification or refutation of ideas.

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