Download e-book for iPad: The Cutting Edge by Robert Fimbel, Alejandro Grajal, John Robinson

By Robert Fimbel, Alejandro Grajal, John Robinson

ISBN-10: 0231114540

ISBN-13: 9780231114547

ISBN-10: 0231504799

ISBN-13: 9780231504799

Contemporary many years have obvious unheard of development within the scale and depth of business forestry. without delay and ultimately, it has degraded the flora and fauna and ecological integrity of those tropical forests, prompting a necessity to judge the influence of present wooded area administration practices and reassess how most sensible to maintain the integrity of the biosphere.

Synthesizing the physique of information of prime scientists and pros in tropical woodland ecology and administration, this book's thirty chapters learn intimately the interaction among bushes harvesting and natural world, from hunted and guarded habitats to invertebrates and big mammal species.

Collectively, the individuals recommend that larger administration is pivotal to the upkeep of the tropics' useful biodiversity, arguing that we needs to discover that tropical forests harbor the bulk (perhaps 70 to eighty percentage) of the world's animal species. extra, they recommend transformations to present practices which may confirm a greater destiny for our priceless assets.

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Where pioneer species flourish after logging, total fleshy fruit production may be enhanced because pioneer trees typically begin reproduction early and produce large numbers of fruits at frequent intervals (Levey 1988b). Increased fruit production on a mass per area basis, however, does not necessarily herald good conditions for all frugivore species. Fruits of many pioneer species are small, sugary, nutrient poor, and may not be used by many primary forest frugivores (Grieser Johns 1997). Furthermore, if logging interrupts fruiting for even a single season (while the 32 TROPICAL FOREST MANAGEMENT AND WILDLIFE trees are recovering from damage and adjusting to more open conditions), the period of scarcity might result in fauna population crashes— from which it takes decades to recover.

Eighty percent of the gaps are small (40–70 m2) and very few are relatively large (300–500 m2). The road network used for the harvest is minimal (covering <4 percent of the area), and principal roads and skid trails average 5 and 3 m wide, respectively (Camacho 1996). Corridors of vegetation with continuous canopy remain intact along streams. , controlled burns of logging debris or mechanical scarification) to foster tree seedling establishment. Changes in plant species composition following implementation of the recommended silvicultural treatments are likely to include at least a temporary increase in the area dominated by early successional species.

If, in addition to logging, site preparation, weed control, or other stand improvement treatments are applied, it is also critical to know their combined effects on forest structure and composition for predicting the local fates of different animal species. Answers to some of these questions are available, yet they represent only a few animal species in even fewer forests (Grieser Johns 1997). Obviously more research is needed, but enough is already known to strongly recommend that all timber-harvesting operations should include reduced-impact logging measures within their design and implementation (see part V).

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The Cutting Edge by Robert Fimbel, Alejandro Grajal, John Robinson

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