Development actions such as urban, residential, commercial, industrial and mining contribute significantly to the loss of biodiversity worldwide. As development and subsequent loss and degradation of habitats continue, terrestrial biodiversity offsets, or mitigation schemes are conservation instruments that increasingly are being developed, implemented, and used throughout Australia and abroad. However, the failure of offset policies and practices to incorporate sound ecological principles into their design and implementation has led to ineffective conservation and management of biodiversity through offsetting. The aim of this research was to develop a ‘recommended best practice’ offset framework for environments experiencing development pressure, and to inform planners and decision makers on a sound ecological approach to improve biodiversity outcomes for terrestrial ecosystems through the use of offsetting/mitigation schemes. A content analysis technique was applied to evaluate 26 local, provincial, and national biodiversity offset policies, guidance/discussion papers, and planning documents from five countries. Five ecological and planning criteria were applied to evaluate the offset policies. The results from the policy evaluation found that most offset policies contained vague, ambiguous statements and difficult to apply concepts and these results were consistent with a plethora of existing literature, which had identified that the planning of offsets lacked effective consideration and implementation of landscape-ecological principles, and that the protection of biodiversity through offsetting was not occurring. It is therefore important that national, state, and regional policies provide sufficient detail, with definitive performance criteria, indicators and targets, rather than vague principles which are open to ambiguous interpretation and inconsistency in implementation. The results from this research suggested that offset policies failed to protect biodiversity in that the majority of policies evaluated did not effectively incorporate ecological principles that would result in no-net-loss of biodiversity outcomes. This included a failure to recognise and consider the impact of offsets at a landscape-ecosystem scale in relation to ecosystem functionality and the viability of biotic populations. This research also indicated that a variety of tools (e.g., remote sensing, field surveys, and expert opinion) can be used to ensure effective consideration of landscape, ecological, and planning aspects of offsetting. The results of a case study in the Coomera-Pimpama region of Gold Coast City, Australia found that Gold Coast City Council explicitly considered only two of the five recommended off-setting criteria outlined in this research and as a result the conservation of biodiversity and in particular the habitat of the koala (Phascolarctos cinereus) in this area remained threatened. Key strategies were identified to help improve biodiversity outcomes from offsetting and these included: requirements to assess both impacted and offset sites, minimisation of threats to offset sites, and collaboration with professionals in other agencies, ensure that statements are accompanied by definitions, policies provide sufficient detail with definitive performance criteria, indicators and targets, active engagement with agencies dealing with offsetting procedures, professionals, or researchers, effective commitments to facilitative integration, structural integration and collaboration, and strategic integration.
| Identifer | oai:union.ndltd.org:ADTP/279296 |
| Creators | Kelsey Dahl |
| Source Sets | Australiasian Digital Theses Program |
| Detected Language | English |
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