Guidelines & Brochures — Global

Stresses Classification Scheme (Version 1.0)

The list of stresses for recording how each threat impacts a taxon is shown below. It is important to consider stresses in any analysis of the threats affecting a taxon.

Stresses are those attributes of a taxon that are impaired directly or indirectly by threatening processes (e.g., reduced population size, fragmentation of habitat, impaired ability to reproduce, etc.). A stress is not a threat in and of itself; rather it is 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.

  • 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

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