Chapter 11 Forestry and Resource Management Section 1

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Chapter 11 Forestry and Resource Management

Chapter 11 Forestry and Resource Management

Section 1: Resource Management • Renewable resources can run out if not used sustainably

Section 1: Resource Management • Renewable resources can run out if not used sustainably • only used as rapidly as they can be replaced • Resource managers must balance people’s needs for a resource and an ecosystem’s need for that resource

Section 1: Resource Management • Resource management – the managing of resource harvesting so

Section 1: Resource Management • Resource management – the managing of resource harvesting so that resources are not depleted • Guided mainly by scientific research but may also be influenced by politics, economics, and social issues

Section 1: Resource Management • Renewable resources that must be managed wisely: • Soil

Section 1: Resource Management • Renewable resources that must be managed wisely: • Soil • Freshwater • Wild animals • timber

Section 1: Resource Management • 3 resource management approaches: • Maximum sustainable yield •

Section 1: Resource Management • 3 resource management approaches: • Maximum sustainable yield • Ecosystem-based management • Adaptive management

Section 1: Resource Management • Maximum sustainable yield (MSY) – aim is to harvest

Section 1: Resource Management • Maximum sustainable yield (MSY) – aim is to harvest the max amount of a resource without reducing amount of future harvests • Goal is to keep population below carrying capacity, at an intermediate size – grows fastest • Management for 1 population could mean changes for other populations

Section 1: Resource Management • Ecosystem-Based Management – goal is to harvest resources in

Section 1: Resource Management • Ecosystem-Based Management – goal is to harvest resources in ways that minimize impact on the ecosystems and ecological processes that provide the resources • Ecosystems are complex, and all interactions are not understood

Section 1: Resource Management • Adaptive Management – involves scientifically testing different management approaches

Section 1: Resource Management • Adaptive Management – involves scientifically testing different management approaches in an area, and then customizing an approach based on the results • Can be time consuming and complicated • Any given management approach will succeed in some places and fail in others

Section 2: Forests and Their Resources • Ecological value of forests: • • •

Section 2: Forests and Their Resources • Ecological value of forests: • • • Conservation of biodiversity Prevention of soil erosion Purification of air and water Reduce flooding Regulate climate through uptake of CO 2

Section 2: Forests and Their Resources • 4 methods of timber harvesting: • •

Section 2: Forests and Their Resources • 4 methods of timber harvesting: • • Clear-cutting Seed-tree approach Shelterwood approach Selection systems

Section 2: Forests and Their Resources • Clear-cutting – all trees in an area

Section 2: Forests and Their Resources • Clear-cutting – all trees in an area are cut at once • Most cost-efficient, but has greatest impact on ecosystem • Causes soil erosion, displacement of entire communities, and may lead to a different climax community, permanently altering ecosystem

Section 2: Forests and Their Resources • Seed-tree approach – small numbers of mature

Section 2: Forests and Their Resources • Seed-tree approach – small numbers of mature and healthy seed-producing trees are left standing so they can reseed the logged area

Section 2: Forests and Their Resources • Shelterwood approach – small numbers of mature

Section 2: Forests and Their Resources • Shelterwood approach – small numbers of mature trees left in place to provide shelter for seedlings as they grow • Less-harmful than clear-cutting

Section 2: Forests and Their Resources • Selection systems – only some of the

Section 2: Forests and Their Resources • Selection systems – only some of the trees are cut at once • More expensive than clear-cutting and more dangerous • Less harmful to ecosystems

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