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Accounting for Uncertainty and Time Lags in Equivalency Calculations for Offsetting in Aquatic Resources Management Programs

机译:在水产资源管理计划抵消性的当量计算中考虑不确定性和时滞

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Biodiversity offset programs attempt to minimize unavoidable environmental impacts of anthropogenic activities by requiring offsetting measures in sufficient quantity to counterbalance losses due to the activity. Multipliers, or offsetting ratios, have been used to increase the amount of offsets to account for uncertainty but those ratios have generally been derived from theoretical or ad-hoc considerations. I analyzed uncertainty in the offsetting process in the context of offsetting for impacts to freshwater fisheries productivity. For aquatic habitats I demonstrate that an empirical risk-based approach for evaluating prediction uncertainty is feasible, and if data are available appropriate adjustments to offset requirements can be estimated. For two data-rich examples I estimate multipliers in the range of 1.5:1 - 2.5:1 are sufficient to account for the uncertainty in the prediction of gains and losses. For aquatic habitats adjustments for time delays in the delivery of offset benefits can also be calculated and are likely smaller than those for prediction uncertainty. However, the success of a biodiversity offsetting program will also depend on the management of the other components of risk not addressed by these adjustments.
机译:生物多样性抵消方案试图通过要求采取足够数量的抵消措施来抵消人为活动不可避免的环境影响,以抵消由于该活动造成的损失。乘数或偏移率已用于增加偏移量以解决不确定性,但这些比率通常是从理论或临时考虑中得出的。我在抵消对淡水渔业生产力的影响的背景下,分析了抵消过程中的不确定性。对于水生生境,我证明了基于经验风险的评估预测不确定性的方法是可行的,并且如果有数据可用,则可以估算出抵消要求的适当调整。对于两个数据丰富的示例,我估计乘数在1.5:1-2.5:1的范围内,足以解决损益预测中的不确定性。对于水生生物栖息地,还可以计算出抵消收益交付中的时延调整,其调整幅度可能小于预测不确定性的调整幅度。但是,生物多样性补偿计划的成功还取决于对这些调整未解决的其他风险部分的管理。

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