Forests

Objective: Explain forest regeneration and selective harvesting, distinguish their meanings, and apply them to a described case.

Forest regeneration: Regeneration replaces or renews tree populations through natural establishment or planting. Selective harvesting: Selective harvesting removes chosen trees and has outcomes depending on intensity, methods, and context. Forest management changes several connected services and can shift them over time. Harvest intensity, road construction, regeneration, and disturbances influence outcomes. Carbon accounting must include relevant pools and the timing of releases and regrowth. Some ecosystems depend on particular disturbance patterns, while inappropriate disturbance can degrade them. A management label alone does not establish sustainability; monitoring habitat, soil, water, and regeneration provides evidence about actual performance. Application: A managed area is monitored for new tree growth after harvest. This most directly illustrates forest regeneration. A harvest retains some trees and evaluates disturbance effects. This most directly illustrates selective harvesting.

Objective: Explain clear-cutting and disturbance regime, distinguish their meanings, and apply them to a described case.

Clear-cutting: Clear-cutting removes most trees from an area and creates effects that vary with site and subsequent management. Disturbance regime: A disturbance regime describes the pattern of events such as fire, storms, or pests over time. Forest management changes several connected services and can shift them over time. Harvest intensity, road construction, regeneration, and disturbances influence outcomes. Carbon accounting must include relevant pools and the timing of releases and regrowth. Some ecosystems depend on particular disturbance patterns, while inappropriate disturbance can degrade them. A management label alone does not establish sustainability; monitoring habitat, soil, water, and regeneration provides evidence about actual performance. Application: A harvest produces an open area with changed runoff and habitat. This most directly illustrates clear-cutting. A landscape historically experiences periodic low-intensity fires. This most directly illustrates disturbance regime.

Objective: Explain carbon storage and multiple-use management, distinguish their meanings, and apply them to a described case.

Carbon storage: Forest carbon is stored in vegetation, dead material, and soils and changes with growth and disturbance. Multiple-use management: Multiple-use management considers several forest benefits and the conflicts among them. Forest management changes several connected services and can shift them over time. Harvest intensity, road construction, regeneration, and disturbances influence outcomes. Carbon accounting must include relevant pools and the timing of releases and regrowth. Some ecosystems depend on particular disturbance patterns, while inappropriate disturbance can degrade them. A management label alone does not establish sustainability; monitoring habitat, soil, water, and regeneration provides evidence about actual performance. Application: An assessment includes soil carbon as well as standing trees. This most directly illustrates carbon storage. A plan balances habitat, recreation, timber, and water protection. This most directly illustrates multiple-use management.