Archive for the ‘Ecosystem services’ Category

Ecosystem services: Between proof-of-concept and early adoption

Friday, January 29th, 2010

Bob Searle and Serita Cox of the Bridgespan group recently published a report on “the state of ecosystem services” (pdf available here). The report analyses the current use of the ecosystem service concept in practice, i.e. in public policies and private sector initiatives. Many of the report’s conclusions are well know to people in the field of ecosystem service science, but several points deserve to be mentioned.

For a start, the report concludes that ecosystem services conservation is between proof-of-concept and early adoption. Never more. Often less.

It also looks into the challenges facing the concept for it to gain policy-relevance and thus go beyond early adoption. The missing requirements are often the following:

  • Scientific evidence that is on a comparable scale to the policy’s authority
  • Scientific evidence that is geographically applicable
  • Scientific evidence that is sufficiently validated and appropriately standardized to avoid legal challenges
  • Strong leadership and advocacy to create the drive to change
  • The issue of standardization is often overlooked by ecosystem scientists yet one of the most difficult aims to achieve without reaching outside academia to other actors such as EIA consulting companies, government agencies, businesses or NGOs. Such reaching out requires common goals, which are themselves dependent on strong leadership and advocacy. Who are the individuals and institutions who are taking up this role? Pages 18 to 23 list interesting examples of ecosystem service-based initiatives, both in the public and private sector.

    The report lists a set of barriers to the development and implementation of ecosystem service conservation (page 24) as well as risks associated with the spread of the ecosystem service concept:

  • Shifting of negative impact: The small scale of most ecosystem services efforts can lead to shifting of negative impact behavior to other regions.
  • Social inequity: Placing a dollar value on something that has been free creates equity concerns and can negatively affect people living in poverty.
  • Decreased cost-effectiveness: Ecosystem services programs may not be the most cost-effective approaches to conservation.
  • Diversion of scarce resources: Focusing on the conservation of an ecosystem service could divert resources from known, tested solutions to unknown, experimental approaches (e.g., restoring mangrove forests instead of building storm walls).
  • Abandonment of established practices: Ecosystem services programs could lead environmental groups to abandon other forms of environmental conservation that have worked in the past.
  • Lack of biodiversity conservation: Ecosystem services programs do not necessarily lead to biodiversity conservation and may negatively affect full, native biodiversity.
  • Unknown, unintended consequences: On a large scale, the risk of unintended consequences becomes a significant concern. Ecosystem services projects could lead to unpredicted, unknown, and irreversible outcomes.
  • This list of potential risks does not mention more general concerns about the “parcelisation” or “commodification” of nature commonly associated with ecosystem service based approaches. The report does however mention that most ecosystem service projects focus on only one or a short selection of ecosystem services rather than on the full suite of services that a given ecosystem provides. Pushing this concern further would show that maintaining fully-functional and/or resilient ecosystems might be a more useful goal than maintaining or enhancing their capacity to provide one or a few services. One or a few services that are deemed important here and now but perhaps not there and then…

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    Biodiversity indicators: 10 common mistakes

    Wednesday, October 28th, 2009

    In a paper published in 2003 in the Journal of Environmental Management, Lee Failing and Robin Gregory list 10 common mistakes made in designing biodiversity indicators for forest management. The paper is a worthy read for anyone dealing with issues of monitoring or decisions concerning land-use or ecosystem management.

    According to the authors, indicators can have three uses: tracking performance (for results-based management), discriminating alternative hypotheses (for scientific exploration), discriminating alternative policies or management options.

    In their paper, they focus on the latter. They list ten common mistakes made in developing and using biodiversity indicators aimed at providing guidance to policy makers or forest managers who must decide on landscape or forest management policies and plans. Deciding whether or not to allow a specific project to go forward requires a different suite of indicators than assessing whether or not the project was a success.

    They provide a nice example to illustrate their point:

    When we go to the doctors and ask “what is my risk of hear disease”, we do not expect the answer to be framed as a percentage of the target daily donut intake”. (…) Eating fewer donuts may be part of a sensible management strategy but it does not answer the question “am I healthy?” A report of two dozen indicators may be an important part of the the analysis process, but it is also not an acceptable answer to the question (…). Doctors it seems understand the need to take a complex thing, break it down into a relatively small number of indicators, and provide a summary judgement about the status of our health or the probability of recovery associated with alternative treatments.

    The 10 mistakes:

  • 1. Failing to define end-points – Is the aim to preserve ecosystem services or scenic value, to prevent the loss of a particular set of species or the intrinsic values and rights of all species.
  • 2. Mixing means and ends – Appropriate performance indicators should focus on the desired goals, not on whether “actions” were taken. Guideline are no substitute to goals.
  • 3. Ignoring the management context – Outside a specific context, “biodiversity” has no meaning – The context must thus be specified.
  • 4. Making lists instead of indicators
  • 5. Avoiding importance weights for individual indicators – Unfortunately, stating that “everything is important” doesn’t work in practice.
  • 6. Avoiding summary indicators or indices because they are considered overly simple
  • 7. Failing to link indicators to decisions
  • 8. Confusing value judgements with technical judgements
  • 9. Substituting data collection for critical thinking – If no data is available, then the authors suggest using established methods for gathering and synthesizing qualitative expert judgements.
  • 10. Oversimplifying: Ignoring spatial and temporal trade-offs – In giving examples for mistake 10, Failing and Gregory mention the importance of taking into account spatial and temporal trade-offs in designing policies aimed at no-net-loss of biodiversity. Temporary and /or local losses could provide – or be made to – provide gains at a broader scale or on the longer term. The same point is made by Kerry ten Kate in an EM podcast on making biodiversity offsets work (mp3).
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    What is an ecosystem service?

    Wednesday, October 21st, 2009

    It’s never too late to ask!

    A list of definitions of ecosystem services had been compiled by the DiverSus project a while ago. It’s a nice starting point into the question of defining which properties (composition / structure / function) of ecosystems are relevant to the benefits / goods / services people obtain from them. Check it out on their wiki.

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