Stresses Classification Scheme (Version 1.0)

This is the list of stresses available for recording against the threats. The stresses coded are not currently shown on the Red List web site, but it is important that they are considered in any anlyses of the threats.

Stresses are those attributes of a taxon that are impaired directly or indirectly by human activities or processes (e.g., reduced population size or fragmentation of forest habitat). A stress is not a threat in and of itself, but rather a degraded condition or "symptom" of the taxon that results from a direct threat.

The attached working document (Dec 2012) provides a list of the stresses with definitions, examples and guidance notes on using the scheme. Comments on the Stresses Classification Scheme are welcome - click feedback.

  • 1 Ecosystem/community stresses
    • 1.1 Ecosystem conversion
    • 1.2 Ecosystem degradation
    • 1.3 Indirect ecosystem effects
  • 2 Species stresses
    • 2.1 Species mortality
    • 2.2 Species disturbance
    • 2.3 Indirect species effects
      • 2.3.1 Hybridization
      • 2.3.2 Competition
      • 2.3.3 Loss of mutualism
      • 2.3.4 Loss of pollinator
      • 2.3.5 Inbreeding
      • 2.3.6 Skewed sex ratios
      • 2.3.7 Reduced reproductive success
      • 2.3.8 Other