The effectiveness of the light-gap method for indicating changes in bandsaw frequency and stiffness

1993 ◽  
Vol 51 (4) ◽  
pp. 260-266 ◽  
Author(s):  
P. F. lister ◽  
G. S. Schajer
Keyword(s):  
Light Gap

Input of wind–dispersed seeds into light–gaps and forest sites in a Neotropical forest

1988 ◽  
Vol 4 (3) ◽  
pp. 239-252 ◽  
Author(s):  
Carol K. Augspurger ◽  
Susan E. Franson
Keyword(s):  
Seed Rain ◽  
Community Level ◽  
Barro Colorado Island ◽  
High Fecundity ◽  
Neotropical Forest ◽  
Study Plot ◽  
Forest Sites ◽  
Light Gaps ◽  
Growth Of Seedlings ◽  
Light Gap

ABSTRACTA total of 52,467 wind-dispersed seeds from 14 tree and 32 liana species fell into 1720 seed traps in 43 paired light-gap and adjacent forest sites on Barro Colorado Island, Panama. Summed at the community level, many more wind-dispersed seeds were collected from light-gaps (61%) than from forest sites (39%). They accumulated from March through May, 1984 to a density of 328 m-2 in gaps and 207 m-2 in forest sites. In contrast, only 33% of the total of 2782 non-wind-dispersed seeds were collected in gaps. Due to the extreme heterogeneity of the seed rain, these differences between gap and forest sites were not statistically significant at the community-level. Gap sites received more wind-dispersed seeds than adjacent forest sites in only 20 of 43 locations and in 13 of 20 species, especially those with individuals of high fecundity near gap sites. Of the estimated 105 million wind-dispersed seeds contributing to the seed rain of the 50 ha study plot, only 4.1% were dispersed to the rare gap sites that enhance the establishment and growth of seedlings for many of these species.

Beech–maple coexistence and seedling growth rates at Mont Saint Hilaire, Quebec

1982 ◽  
Vol 60 (7) ◽  
pp. 1279-1281 ◽  
Author(s):  
Jean Cypher ◽  
Douglas H. Boucher
Keyword(s):  
Seedling Growth ◽  
Tree Species ◽  
Acer Saccharum ◽  
Sugar Maple ◽  
Forest Tree ◽  
Fagus Grandifolia ◽  
American Beech ◽  
Main Hypothesis ◽  
Auxiliary Hypothesis ◽  
Light Gap

We tested the hypothesis that coexistence of forest tree species is promoted by canopy-dependent seedling growth, such that each tree species grows faster under adults of a different species. The study was carried out in the forest of Mont Saint Hilaire, P.Q., using seedlings of American beech (Fagus grandifolia) and sugar maple (Acer saccharum). The main hypothesis was confirmed, while an auxiliary hypothesis for coexistence involving differential longevity and light gap growth was not confirmed.

scholarly journals Scattering of slow-light gap solitons with charges in a two-level medium

2009 ◽  
Vol 42 (5) ◽  
pp. 055101 ◽  
Author(s):  
J Leon ◽  
P Anghel-Vasilescu ◽  
F Ginovart ◽  
N Allegra
Keyword(s):  
Slow Light ◽  
Gap Solitons ◽  
Level Medium ◽  
Light Gap
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