12-Resource Managemen tpost

12-Resource Managemen tpost - Ecology Environmental...

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Resource Management Ecology & Environmental Problems Biology 1305
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Resources are vital to us Resource management = the practice of harvesting potentially renewable resources in ways that do not deplete them Resource managers are influenced by political, economic, and social factors A key question is whether to focus on the resource of interest or to look more broadly at the entire environmental system
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Maximum sustainable yield Maximum sustainable yield = aims to achieve the maximum amount of resource extraction Without depleting the resource from one harvest to the next Populations grow most rapidly at an intermediate size Population size is about half its carrying capacity Managed populations are well below what they would naturally be Reducing populations so drastically affects other species and can change the entire ecosystem
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Ecosystem-based management Ecosystem-based management = managing the harvesting of resources to minimize impact on the ecosystems and ecological processes Carefully managing ecologically important areas Considering patterns at the landscape level Protecting some forested areas It is challenging for managers to determine how to implement this type of management Ecosystems are complex, and our understanding of how they operate is limited
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Adaptive management evolves and improves Adaptive management = systematically testing different management approaches and aiming to improve methods Monitoring results and adjusting methods as needed A fusion of science and management Time-consuming and complicated
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Forest Management Forests cover over 30% of Earth’s land surface Provide habitat, maintain soil, air, and water quality, and play key roles in biogeochemical cycles Provide wood for fuel, construction, paper production Foresters , professionals who manage forests through the practice of forestry, must balance ecosystem services with demand for wood products
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Ecological value of forests One of the richest ecosystems for biodiversity Structural complexity houses great biodiversity A forest provides many ecosystem services Stabilizes soil and prevents erosion Slows runoff, lessens flooding, purifies water Stores carbon, releases oxygen, moderates climate
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Economic value of forests Benefits: fuel, shelter, transportation (boats), paper Helped society achieve a high standard of living Logging Locations: Boreal Forests: Canada, Russia Rainforests: Brazil, Indonesia Conifer Forests/Pine Plantations: U.S. In 2005, over 1/3 all forests were designated for timber production
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Demand for wood leads to deforestation Deforestation = the clearing and loss of forests Alters landscapes and ecosystems Degrades soil Causes species decline and extinction Adds carbon dioxide to the air Developing countries boost their economies and get land for their growing populations by logging forests
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Loggers moved westward, searching for large trees
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