Logging and clear-cutting
Logging is the practice of harvesting timber from forests for various purposes, including lumber and fuelwood. Clear-cutting is a specific logging technique where all trees in a designated area are removed simultaneously. While some argue that such practices can promote forest health by keeping ecosystems young, critics highlight the potential environmental downsides, including habitat destruction, soil erosion, and increased flooding. Improper logging operations can exacerbate these issues, contributing to global warming through greenhouse gas emissions and reduced forest carbon sequestration.
The logging process involves selecting, felling, trimming, and removing trees, using equipment that ranges from simple hand tools to sophisticated machinery. Clear-cutting may be employed for plantation-grown forests or when specific tree species require full sunlight for regeneration. Conversely, selective harvesting is a more sustainable method that preserves certain trees while removing others.
Noncommercial logging occurs at a smaller scale, often for household needs, but its cumulative effect can be damaging without sustainable practices in place. Various countries have initiated programs to help small landowners adopt environmentally sound logging techniques, though the availability of resources may vary widely. As of early 2021, concerns about deforestation, particularly in tropical regions, continue to grow, emphasizing the need for responsible forest management practices.
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Logging and clear-cutting
DEFINITIONS: Logging is the harvesting of timber from forestlands with the intention of using it for specific purposes, such as lumber, fuelwood, or the production of pulp or chemicals; clear-cutting is a logging technique in which all the timber is removed from a stand at the same time
Improper logging and clear-cutting can pose a variety of threats to the environment, including the destruction of wildlife habitat and the disturbance of soil in ways that can lead to erosion and flooding. Previously, some argued that logging and clear-cutting kept forests young and healthy so that wildlife could thrive, but critics say this is not true. Environmentally sensitive logging practices, however, can minimize such negative impacts.
Although some people may think of logging and as practically synonymous, the two are not the same. Similarly, many people may have the impression that commercial logging is responsible for all losses of forestland, but, particularly in tropical areas, many hectares of forestland are cleared annually for other purposes. Rain forests in Amazonia, for example, are often bulldozed to create pastureland for cattle. The timber is not harvested; rather, it is simply pushed into piles and burned at the site.
Logging and clear-cutting, if improperly done or motivated by short-term economic goals, can pose significant threats to the environment. Logging always involves some disturbance to soil and wildlife. If performed in environmentally sensitive areas, it can destroy irreplaceable habitat, contribute to problems with and flooding, and worsen the threat of global warming. Heavy equipment can compact soil, leaving ruts that may persist for many years, while clear-cutting hillsides can lead to erosion, stream siltation, and devastating floods. In Asia, for example, clear-cutting in the mountains of Nepal and India resulted in disastrous floods in Bangladesh. Even when logging does not inflict long-term damage on the immediate environment, the simple removal of trees can contribute to global warming. The burning of slash (waste material) at logging sites pumps greenhouse gases into the atmosphere, and the loss of forest means that there are fewer trees to break those gases down into oxygen and compounds.
Regardless of whether a logger is cutting only one tree or one thousand, logging involves four basic steps: selecting the timber to be harvested, felling the trees, trimming away material, and removing the desired portion of the tree from the woods. Equipment used in logging ranges from simple hand tools, such as axes and crosscut saws, to multifunction harvesting machines costing hundreds of thousands of dollars each. A mechanized feller buncher, for example, can fell a tree, trim off the branches, cut the stem into logs of the desired length, and the logs to await removal from the forest. The choice of equipment utilized in harvesting any specific stand of timber depends on factors such as the terrain, the type of timber to be logged, and whether the logger intends to harvest only selected trees or to clear-cut the site.
Loggers are more likely to clear-cut, or remove all the standing timber from a section of land, if the timber is plantation grown and of a uniform age and size. Clear-cutting also occurs in forests where the desired species of trees need large amounts of sunlight to regenerate. Many conifers, such as Douglas fir, are shade-intolerant. Landowners will occasionally decide to change the dominant species on a tract and so will clear-cut existing timber to allow for replanting with new, more commercially desirable trees. Clear-cutting can be an acceptable practice in sustainable forestry when plantation stands are harvested in rotation.
Selective harvesting, in contrast with clear-cutting, leaves trees standing on the tract. Selective harvesting can be utilized with even-age plantation stands as a thinning technique. More commonly, it is used in mixed and uneven-age stands to harvest only trees of desired species or sizes. In cutting hardwood for use as lumber, for example, 30 centimeters (12 inches) may be considered the minimum diameter of a harvestable tree. Trees smaller than that will be left in the woods to continue growing.
An individual, noncommercial woodcutter may fell only a few trees per year on small parcels of land. Commercial loggers, in contrast, annually harvest hundreds of thousands of trees and operate on large parcels of land. Nonetheless, a significant number of hectares of forestland are cleared annually by people who rely on noncommercial logging for wood for their own individual needs, such as fuel for cooking or heating their homes. Although some woodcutters may cut more than they need for their own use and then sell the surplus, fuelwood for individual households is usually gathered by members of the households that use the wood. Other examples of noncommercial logging include farmers cutting trees for use as fencing or building materials on their own property.
From an environmental viewpoint, the biggest difference between commercial and noncommercial logging would seem to be one of scale, but even this is not always true. Improper logging on a small parcel can have more of an impact on a or than professional harvesting of a large stand. Even if no single household’s logging practices pose a problem, the gathering of fuelwood or other timber by multiple households in an area can be devastating. With no guidance from professional foresters, woodcutters tend to harvest trees based on convenience for themselves rather than on principles of sustainable forestry or watershed management. Many nations have developed programs in which professional foresters provide advice to small property owners on environmentally sound timber harvesting practices and improvement of timber stands, but the availability of such help varies widely from country to country. However, clear-cutting remained a concern in the early twenty-first century, with the New York Times reporting that deforestation in tropical forests in 2020 had accelerated by more than 10 percent compared to the year prior.
Bibliography
Bevis, William W. Borneo Log: The Struggle for Sarawak’s Forests. Seattle: University of Washington Press, 1995.
Colfer, Carol J. Pierce. The Equitable Forest: Diversity, Community, and Resource Management. Washington, D.C.: Resources for the Future, 2005.
Davis, Lawrence S., et al. Forest Management: To Sustain Ecological, Economic, and Social Values. 4th ed. Boston: McGraw-Hill, 2001.
Fountain, Henry. "Tropical Forest Destruction Accelerated in 2020." The New York Times, 31 Mar. 2021, www.nytimes.com/2021/03/31/climate/deforestation-amazon-brazil.html. Accessed 3 July 2024.
Ketcham, Christopher. “Is Clear-Cutting U.S. Forests Good for Wildlife?” National Geographic, 24 Mar. 2022, www.nationalgeographic.com/environment/article/is-clear-cutting-us-forests-good-for-wildlife. Accessed 3 July 2024.
Stenzel, George, Thomas A. Walbridge, Jr., and J. Kenneth Pearce. Logging and Pulpwood Production. 2d ed. New York: John Wiley & Sons, 1985.
Tacconi, Luca, ed. Illegal Logging: Law Enforcement, Livelihoods, and the Timber Trade. Sterling, Va.: Earthscan, 2007.
Walker, Laurence C., and Brian P. Oswald. The Southern Forest: Geography, Ecology, and Silviculture. Boca Raton, Fla.: CRC Press, 2000.