Implementation gap between the theory and practice of biodiversity offset multipliers
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- Implementation Gap between the Theory and Practice of Biodiversity Offset Multipliers
Final published version, 498 KB, PDF document
Emerging policies worldwide require biodiversity gains as compensation for losses associated with economic development, seeking to achieve “no net loss” (NNL). Multipliers – factors by which gains are larger than associated losses – can be crucial for true NNL. Here, we review the theoretical literature on multipliers. Then, we collate data on multipliers implemented in practice, rep- resenting the most complete such assessment to date. Finally, we explore remaining design gaps relating to social, ethical, and governance considerations. Multiplier values should theoretically be tens or hundreds when considering, for example, ecological uncertainties. We propose even larger multipliers required to satisfy previously ignored considerations – including prospect theory, taboo trades, and power relationships. Conversely, our data analyses show that multipliers are smaller in practice, regularly <10.0, and have not changed significantly in magnitude over time.We recommend that NNL policymakers provide explicit multiplier guidelines, require larger multipliers where appropriate, and ensure transparent reporting of multipliers used. Further research is necessary to determine reasons for the implementation gap we have identified. At the same time, there is a need to explore when and where the social, ethical, and governance requirements for NNL reviewed here can be met through approaches other than multipliers.
Original language | English |
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Journal | Conservation Letters |
Volume | 10 |
Issue number | 6 |
Pages (from-to) | 656–669 |
Number of pages | 14 |
ISSN | 1755-263X |
DOIs | |
Publication status | Published - 2017 |
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