5.15 Sustainable Forestry

Forestry practices: harvest methods

Clear-cutting removes all trees in an area — cheap and efficient but causes erosion, habitat loss, and reduced biodiversity. Selective cutting removes only mature/marketable trees, preserving forest structure. Shelterwood cutting removes trees in stages, leaving some to reseed and shelter new growth. Strip cutting clears narrow strips along the contour, allowing regrowth from adjacent uncut areas while limiting erosion.

Costs and benefits of forestry

Forests provide timber, paper, fuelwood, and jobs, but unsustainable logging causes deforestation, soil erosion, loss of biodiversity, and disrupted water cycles. Sustainable forestry balances economic use with ecological health through practices like selective cutting, replanting, reduced-impact logging, and protecting old-growth stands, ensuring forests regenerate and continue providing ecosystem services long-term.

Sustainable forest management strategies

Strategies include reforestation/afforestation (replanting trees), agroforestry (combining trees with crops/livestock), certification programs (e.g., FSC) that verify sustainable sourcing, and controlled/prescribed burns to reduce fuel loads and wildfire risk. These approaches maintain biodiversity, soil stability, and carbon storage while still allowing timber harvest and forest-based economic activity.

Key terms

Clear-cutting

Removing all trees in an area at once; efficient but causes erosion, habitat loss, and reduced biodiversity.

Selective cutting

Removing only specific mature or valuable trees, preserving overall forest structure.

Shelterwood cutting

Removing trees in stages, leaving some to reseed and shelter new growth.

Strip cutting

Clearing narrow strips of trees along the contour, allowing regrowth from adjacent uncut forest and limiting erosion.

Agroforestry

Combining tree cultivation with crops or livestock on the same land to increase productivity and sustainability.

Try an AP-style question

Which practice is part of sustainable forestry?

1. Clearcutting entire forests
2. Planting only one species
3. Burning all dead trees
4. Selective cutting and replanting