Forest Ecology and Management - Prof. James, Study notes of Forestry

This document provides an overview of forest ecology and management, covering key concepts and principles related to applying ecological principles to managing forest resources. It discusses forest management objectives, definitions, and categories, including silviculture, conservation, and restoration. The document explores spatial scales, global and local forest uses, deforestation, and management objectives like timber production, non-timber products, and ecosystem services. It examines forest stand metrics, silviculture systems, regeneration methods, stand structure and development, and intermediate treatments. Finally, it covers harvesting considerations, such as road construction, techniques, transportation, and market for products.

Typology: Study notes

2023/2024

Uploaded on 05/15/2024

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Forest Ecology & Management
Objectives
Application of basic ecological principles
to the management of forest resources
It should be apparent…that almost all human evolution,
from primeval, primate stock to ground ape and then
through agricultural, technical, and cultural revolutions
to the present time, has been intimately associated with,
and conditioned by, forests.” (J.P. Kimmins 1987)
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  • Objectives
    • Application of basic ecological principles to the management of forest resources

It should be apparent…that almost all human evolution, from primeval, primate stock to ground ape and then through agricultural, technical, and cultural revolutions to the present time, has been intimately associated with, and conditioned by, forests .” (J.P. Kimmins 1987)

  • Definitions
    • Forest
    • Forestry
    • Forest resources
      • Timber vs. non-timber vs. ecosystem services
  • ~60% of the Earth’s pre-human land surface was forested
  • ~30% of current land surface is forested
    • 0.62 ha (~1.5 acres) per person
  • ~22% of original forest classified as “Frontier Forests”

Current Forest Extent

(30% of land surface; ~50% of original forest)

Original Forest Extent

(60% of land surface)

Frontier Forest Extent

(22% of original forest)

  • Forest Management - Categories

Silviculture (^) Restoration Conservation

  • Forest Management - Global Uses
  • Forest Management - Hawai‘i Uses

1920 2000

Ewel and Putz 2004

  • Forest Management - Deforestation
  • Forest Management - Objectives
  • Forest Stand Metrics - Mensuration
    • Density
    • DBH
    • Height
    • Basal Area
      • Volume
      • Biomass
      • Species Composition
      • Age structure
  • Forest Stand Metrics - Density
    • How many trees/ha?

20 m

20 m

  • Forest Stand Metrics - DBH

1.37 m Diameter

  • Forest Stand Metrics - Basal Area (BA)
    • Cross sectional area of a tree at 1.37 m
    • BA = (π*dbh 2 ) / 4
      • For BA of a single tree (cm^2 ) when dbh is cm
    • BA = (π*dbh^2 ) / (4 * 10,000)
      • For BA of a single tree (m^2 ) when dbh is cm
    • What is the BA of this tree in cm 2 and m^2?

DBH = 20 cm

  • Forest Stand Metrics - BA with a

“wedge prism”

  • Forest Stand Metrics - BA with a

Nomogram