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No Net Loss of Fish Habitat: A Review and Analysis of Habitat Compensation in Canada

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Abstract

The achievement of No Net Loss (NNL) through habitat compensation has rarely been assessed in Canada. Files relating to 124 Fisheries Act Section 35(2) authorizations issued by Fisheries and Oceans Canada for the harmful alteration, disruption, and destruction of fish habitat (HADD) were collected and reviewed. Data extracted from these files were pooled and analyzed to provide an indication of the types of HADDs that have been authorized in Canada, what habitats have been affected, and what habitat management approaches have been used when compensating for HADDs and monitoring and ensuring the success of the compensation. Determinations regarding the effectiveness of habitat compensation in achieving NNL were made. Impacts to 419,562 m2 of fish habitat from the 124 authorized HADDs were offset by 1,020,388 m2 of compensatory habitat. Eighty percent of the authorizations had compensation ratios (compensation area:HADD area) of 2:1 or less, and 25% of the authorizations had a compensation ratio that was less than 1:1. In-channel and riparian habitat were the most frequently impacted habitats. Urban development and roads and highways resulted in the greatest areal loss of habitat. The compensation option that was most often selected was the creation of in-kind habitat. The mean duration of post-construction monitoring programs was 3.7 years. Determinations of NNL could only be made for 17 authorizations as a result of poor proponent compliance with monitoring requirements and the qualitative assessment procedures used by the monitoring programs. Adequate resources, proper training, and standardized approaches to data management and monitoring programs are required to ensure that the conservation goal of NNL can be achieved in Canada.

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Acknowledgments

The authors would like to thank the staff in the DFO Regional and Area Offices for their support and access to files. We also thank Joan Bateman, James Wilkinson, and Angela d’Eon for their support, and Otto Langer, Scott Hinch, Patrice LeBlanc, Pierre Lemieux, Christine Stoneman, and two anonymous reviewers for their technical review. Special thanks are also due to Marcia Vanwelly and Louise Archibald of the DFO Pacific Region Library for their continued support and the excellent service they provide. Funding for this initiative was provided by the Environmental Science Strategic Research Fund.

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Harper, D.J., Quigley, J.T. No Net Loss of Fish Habitat: A Review and Analysis of Habitat Compensation in Canada. Environmental Management 36, 343–355 (2005). https://doi.org/10.1007/s00267-004-0114-x

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