Forest damage caused by selection logging of mahogany (Swietenia macrophylla) in northern Belize

Whitman, Andrew A.; Brokaw, Nicholas; Hagan, John M.

doi:10.1016/s0378-1127(96)03941-2

Cited by 80 publications

(55 citation statements)

References 10 publications

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“…The empirical LAImetre, although attractive by its price (about $50), still has to prove that it is a valuable instrument and that its empirical component (correction factor C) is not a serious drawback. Finally, the densiometer does not seem accurate enough in understorey [17]; its use should be limited to rapid and coarse assessments of contrasted situations [34,48].…”

Section: Discussionmentioning

confidence: 99%

A comparison of five indirect methods for characterizing the light environment in a tropical forest

et al. 2001

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-We compared five methods for measuring light availability in the tropical forest understorey: the LAI-2000 PCA, an empirical LAI-metre, a densiometre, photosensitive diazo paper metres, and hemispherical photographs. Measurements were made along three 250 m transects and adjacent to 95 seedlings on four logged or virgin plots of a French Guianese forest. Correlation analysis showed that more mobile and less expensive methods, such as the LAI metre and diazo paper metres, can provide similar information to more cumbersome or expensive equipment such as the LAI-2000 metre or hemispherical photographs. All instruments except the densiometre detected differences among seedlings from different post-logging microsites. Few significant correlations were found between light measures and the number of trees or their basal area within 10 m, which may reflect an increase in the density of smaller stems and lianas during post-logging succession.light measure / tropical forest / leaf area index / seedling / hemispherical photography / diazo paper Résumé -Comparaison de cinq méthodes pour caractériser l'environnement lumineux de plantules en forêt tropicale. Cinq mé-thodes de mesure de la quantité de lumière disponible dans le sous-bois d'une forêt tropicale sont comparées : le LAI-2000 PCA, un appareil de mesure empirique du LAI, un densiomètre, des papiers diazo photosensibles et un appareil de photographie hémisphérique. Les mesures ont été effectuées le long de trois transects de 250 m et à proximité de 95 plantules, dans quatre parcelles exploitées ou vierges d'une forêt guyanaise. L'analyse des corrélations entre mesures montre que des méthodes comme l'appareil de mesure empirique du LAI ou les papiers diazo peuvent fournir, de façon plus pratique et moins coûteuse, des informations semblables à celles données par le LAI-2000 ou les photographies hémisphériques. Tous les appareils, excepté le densiomètre, décèlent des différences entre des plantules poussant dans des microhabitats rendus différents par l'exploitation. Peu de corrélations significatives entre les mesures de lumière et l'effectif d'arbres ou leur surface terrière dans un rayon de 10 m ont été trouvées, ce qui tend à indiquer que la densité des petites tiges et des lianes s'est accrue à la suite de l'exploitation. mesure de lumière / forêt tropicale / indice foliaire / plantule / photographie hémisphérique / papier diazo Ann. For. Sci. 58 (2001) [877][878][879][880][881][882][883][884][885][886][887][888][889][890][891] 877

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Section: Discussionmentioning

confidence: 99%

A comparison of five indirect methods for characterizing the light environment in a tropical forest

et al. 2001

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“…Nikooy (2007) studied logging damage on regeneration in the Caspian forest and reported that damage rate on the seedling; small sapling and large sapling stage were 20.3, 20.6, and 26.5% in felling gaps. Whitman et al (1997) reported damage level of 15% to seedlings in a single tree selection cutting operation in northern Belize. The logging methods have a big influence on effects on regeneration disturbance.…”

Section: Damage To Regenerationmentioning

confidence: 99%

Damages to soil and tree species by cable-skidding in Caspian forests of Iran

et al. 2017

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Aim of study: The main aims of this study were to determine of damage level to residual stand and soil disturbance from mechanized selection logging.Area of study: Mixed beech stands in Caspian forests, northern Iran. Material and methods: Point-transect and systematic plot sampling were used for assessing damages to soil and trees, respectively.Main results: 89% of forest soil area was undisturbed or shallow disturbed, and 5.2% was deep disturbed. Soil bulk density of top 10 cm in the winching corridors, ruts and skid trails were increased 10.7%, 20.6% and 32.1% respectively than controlled area. Frequency of damages to regeneration and trees were 12% and 11.2%. The frequency of damages to regeneration was increased with increasing of their heights, but frequency of damages to trees was decreased with increasing of their diameter. The most type of damages was bole wounds in sizes of 100 to 200 cm 2 within 1 m from the ground level, and deep wounds. The frequency of damages was different in tree species (p = 0.001). The mean size of bole wounds was 174 cm 2 , and the mean height of bole wounds was 70 cm from ground level. The intensity of wounds on trees bole were decreased with increasing of their heights from ground level (p = 0.02), while their sizes were increased (p = 0.001).Research highlights: Winching of logs was the main cause of damages to soil and residual stand. The detailed planning strategy will reduce damage to level which is acceptable and predictable.

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“…For instance, 80% of 4-11 year-old gaps generated by selective logging in semi-deciduous forests of Mexico had 20-40% of canopy openness (Dickinson et al, 2000). The canopy openness in gaps recently formed by conventional selective logging was approximately 29% in the eastern Brazilian Amazon (Pereira et al, 2002) and approximately 12% in the humid subtropical forests of Belize (Whitman et al, 1997). The reason why canopy openness was higher in the logged dry forests of this study is not clear.…”

Section: Discussionmentioning

confidence: 57%

“…Selective logging causes soil compaction (Whitman et al, 1997;Frederiksen and Pariona, 2002) and soil disturbance (Frederiksen and Mostacedo, 2000;Fredericksen and Pariona, 2002). It damages trees and saplings in logged stands (Webb, 1997;Jackson et al, 2002) and also increases canopy openness (Uhl and Vieira, 1989;Veríssimo et al, 1992;Webb, 1997).…”

Section: Introductionmentioning

confidence: 99%

Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging

Vieira

Scariot

2008

Braz. arch. biol. technol.

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Forest damage caused by selection logging of mahogany (Swietenia macrophylla) in northern Belize

Cited by 80 publications

References 10 publications

A comparison of five indirect methods for characterizing the light environment in a tropical forest

A comparison of five indirect methods for characterizing the light environment in a tropical forest

Damages to soil and tree species by cable-skidding in Caspian forests of Iran

Environmental variables and tree population structures in deciduous forests of central Brazil with different levels of logging

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