2016年-世界发展银行全球_Biodiversity_Offsets___A_User_Guide_70页_3mb

Biodiversity Offsets: A User Guide Summary

Core Content

This document, Biodiversity Offsets: A User Guide, provides an introductory overview of biodiversity offsets as a conservation tool for large-scale development projects. It outlines the rationale, definition, principles, implementation, and limitations of biodiversity offsets, with a focus on their role in achieving No Net Loss or Net Gain in biodiversity.

Main Purpose

The guide aims to help project planners, conservationists, and stakeholders understand when and how to use biodiversity offsets effectively. It also explores opportunities for developing national biodiversity offset systems, emphasizing the need for a structured and consistent approach to biodiversity conservation.

Key Concepts

Definition of Biodiversity Offsets

Biodiversity offsets are measurable conservation outcomes resulting from actions designed to compensate for significant residual adverse biodiversity impacts from a development project, after avoidance, minimization, and restoration measures have been applied. These offsets are typically implemented in areas separate from the original project site.

Intended Conservation Outcomes

The primary goal is to achieve No Net Loss or Net Gain in biodiversity. This is evaluated based on the area conserved, species composition, habitat types, ecosystem functions, and cultural values. Some offsets may only achieve reduced net loss, depending on the project's design and implementation.

What Makes Offsets Distinctive

Biodiversity offsets are unique in two main ways:

1. They are explicitly linked to a development project causing biodiversity loss.
2. They focus on achieving No Net Loss or Net Gain through measurable, long-term, and additional conservation actions.

Biodiversity Offsets and Ecosystem Services

Biodiversity offsets are closely tied to the conservation of ecosystem services, which are the benefits people derive from ecosystems. These services are categorized into:

• Provisioning services: Products like food, water, and medicinal plants.
• Regulating services: Functions such as water purification, flood protection, and climate regulation.
• Cultural services: Aesthetic and recreational values.
• Supporting services: Natural processes that sustain other services (e.g., pollination, soil formation).

However, offsets may not be suitable for compensating local ecosystem service losses, as they often target species and ecosystems in different locations, and the physical distance or resource use restrictions may hinder the replacement of specific services.

When to Consider Using Biodiversity Offsets

Biodiversity offsets are considered as a last resort in the mitigation hierarchy, which prioritizes:

1. Avoiding biodiversity impacts.
2. Minimizing them.
3. Restoring damaged sites or species.
4. Compensating for residual impacts through offsets.

They are most commonly used in:

• Public infrastructure projects (e.g., hydroelectric dams).
• Private sector extractive industries (e.g., mining, oil, gas).

Examples of projects that could benefit from offsets include:

• Electric power (generation and transmission).
• Transport (roads, ports, airports).
• Water supply (dams, canals).
• Extractive industries (mining, oil and gas).
• Forestry and agriculture (plantations, large-scale farming).
• Urban expansion (housing, commercial facilities).

Core Principles

Three core principles guide the design and implementation of biodiversity offsets:

1. Additionality: Offsets must deliver additional conservation gains beyond what would be achieved by other activities.
2. Equivalence: Offsets should conserve similar biodiversity values to those lost by the original project, following the like-for-like principle. In some cases, trading-up may be used, where the offset area has higher conservation priority.
3. Permanence: Offsets should be long-lasting, ideally in perpetuity, to ensure that conservation outcomes are maintained over time.

Limitations and Concerns

Biodiversity offsets are not a panacea and have certain limitations:

• Inadequate offsets may be too small, legally uncertain, or financially unsustainable.
• They may be misused to justify destructive projects by providing a "license to destroy".
• Some damages cannot be offset, especially if the affected area is unique or irreplaceable.
• Project acceptability depends on government and public opinion, and should not be used to offset non-existent or inevitable biodiversity loss.

Financial and Institutional Considerations

The financial sustainability of biodiversity offsets is crucial, requiring both initial and recurring costs to be addressed. Institutional capacity building and stakeholder engagement are also essential to ensure effective implementation and long-term success.

Scaling-Up Through Aggregation

The guide also discusses the potential for scaling-up biodiversity offset efforts through aggregation, where multiple small projects are combined to achieve larger conservation outcomes. It highlights the need for national systems that can support such aggregated approaches.

Case Studies

The document includes case studies from:

• Liberia Ninja Western Range Iron Ore
• Madagascar Ambatovy Minerals
• Cameroon Lom Pangar Hydropower

These case studies provide real-world examples of how biodiversity offsets have been applied and their outcomes.

Conclusion

Biodiversity offsets are a valuable tool in conservation, but they require careful design, implementation, and monitoring. They should be used only when avoidance and minimization are not sufficient, and they must be additional, equivalent, and permanent to be effective. The guide emphasizes the importance of scientific rigor, stakeholder engagement, and legal and financial sustainability in ensuring that biodiversity offsets contribute positively to conservation goals.