In West African forestry, indigenous tree species such as Iroko, Mahogany, and Obeche are widely harvested for commercial timber. Which of the following correctly classifies these tree species and identifies the major operational difficulty associated with transporting them along rivers?
- They are dense tropical hardwoods, many of which tend to sink in water and require lighter feeder logs or motorized barges for river transport.Cevap
- BThey are commercial softwoods that float easily, creating severe river blockages and navigation hazards along transport channels.
- CThey are temperate softwoods whose cellular structure decays rapidly when rafted down tropical river systems.
- DThey are tropical softwoods that absorb excessive river water, making them impossible to load onto log transport trucks at coastal sawmills.
Cevap
West African timber species such as Iroko, Mahogany, and Obeche are tropical hardwoods. Because many of these hardwood species have high wood density, they sink in water (known as 'sinkers') and require support from buoyant softwood species, bamboo rafts, or specialized barges for river transport.
The correct option accurately identifies Iroko, Mahogany, and Obeche as tropical hardwoods and notes that high wood density causes many logs to sink in water, necessitating the use of barges or lighter floaters during river rafting.
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Classification and Log Transport Dynamics of African Tropical Hardwoods
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