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[Comparison analysis on physical and value assessment methods for ecosystems services].

J Zhao1, H Xiao, G Wu

  • 1Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085. jzhao@mail.rcees.ac.cn

Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|January 5, 2002
PubMed
Summary

Comparing ecosystem service assessment methods reveals that the Physical Assessment Method (PAM) and Value Assessment Method (VAM) can yield different results. These methods offer complementary insights for diverse assessment needs and scales.

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Area of Science:

  • Ecology
  • Environmental Science
  • Ecosystem Services Assessment

Background:

  • Ecosystem services assessment is crucial for understanding human-environment interactions.
  • Various methodologies exist, each with inherent strengths and limitations.
  • The Physical Assessment Method (PAM) and Value Assessment Method (VAM) are two prominent approaches.

Purpose of the Study:

  • To compare the Physical Assessment Method (PAM) and Value Assessment Method (VAM) for ecosystem services assessment.
  • To analyze the strengths and weaknesses of both PAM and VAM.
  • To understand their applicability across different assessment purposes and spatial scales.

Main Methods:

  • Comparative analysis of ecosystem services assessment methodologies.
  • Evaluation of the Physical Assessment Method (PAM).

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  • Evaluation of the Value Assessment Method (VAM).

    • Main Results:

    • PAM and VAM can produce divergent, even contradictory, results for the same ecosystem.
    • The functional outcomes of PAM and VAM vary based on assessment objectives.
    • The effectiveness of PAM and VAM is scale-dependent.

    Conclusions:

    • PAM and VAM are not interchangeable and may offer distinct perspectives.
    • The choice of method depends on the specific goals and spatial context of the assessment.
    • PAM and VAM can be utilized synergistically to provide a more comprehensive understanding of ecosystem services.