Chapter 12Resource Management

Chapter 12Resource Management - Chapter 12 Resource...

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Chapter 12 Resource Management, Forestry, Land Use and Protected Areas clear-cutting - logging that removes all trees from an area destroys forests and ecosystems, contributes to erosion of soil, on steep hillsides, can cause landslides Case in Clayquot Sound, Vancouver, BC - large timber industry -1993 opposition to claer cutting of old growth forests -boycotts of Canadian lumber by British companies -led to 1995 end of clear cutting at Clayquot -forest management plan with limited logging in old growth areas has led to increased ecotourism -boom in ecotourism -benefit to economy replaced loss from reduced logging Resource Management Harvesting renewable resources in a responsible way not to deplete them soils- plans to prevent erosion feshwater -plans to reduce pollution rangeland-manage grazing to preserve rangeland minerals - not renewable. Mining is not managed. Companies remove as much as they can and then move on to new areas. Mining can have environmental impacts: removing vegetation, causing erosion and acid runoff that pollutes waterways Goal of resource management - maximum sustainable yield Achieve maximum extraction of resources without depletion between harvests Keeps resources from being depleted, but still is disruptive to ecosystems because populations are kept at intermediate levels, enough to repopulate before next harvest, but still at lower than natural levels. Examples : Fish kept at levels that are half of carrying capacity has an effect on other species Forests - trees are cut after they have gone through a rapid growth phase so trees never fully mature. This keeps timber supply going, but changes the ecosystem that is meant to have trees of a certain mature size Ecosystem based management becoming more popular today - harvesting to minimize ecosystem impact example: Clayquot Sound plan that protects some areas and carefully manages the ecologically important areas. Adaptive management testing different approaches to find out what works best. Constantly monitor results and adjust methods example: Northwest Forest plan - one of first large adaptive managment plans - Westen
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Washington, Oregon and NW California. See p 348-349 Forestry Management Forest ecologically valuable and valuable for its products demand for wood products has led to deforestation - clearing and loss of forests. Deforestation In tropical forests - led to loss of biodiversity In arid climates - led to desertification Also contributes to climate change - vegetation soaks of excess CO2 that is emitted when plants decompose or are burned. Fastest rates of deforestation - tropical forests in Latin America and Africa
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This note was uploaded on 05/04/2008 for the course GEOSCIENCE 008 taught by Professor Dorale during the Spring '08 term at University of Iowa.

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Chapter 12Resource Management - Chapter 12 Resource...

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