2026-07-17 スウォンジー大学
＜関連情報＞
- https://www.swansea.ac.uk/press-office/news-events/news/2026/07/new-study-defines-conditions-for-successful-long-term-biodiversity-net-gain.php
- https://conbio.onlinelibrary.wiley.com/doi/10.1111/cobi.70362
生息地の遷移と定着の動態における生物多様性オフセットの最適化 Optimizing biodiversity offsetting for habitat succession and colonization dynamics
Konstans Wells, Luca Börger, Miguel Lurgi, Kevin Watts, James M. Bullock
Conservation Biology Published: 17 July 2026
DOI:https://doi.org/10.1111/cobi.70362
Abstract
Biodiversity offsetting aims to compensate for ecological losses from development through conservation and restoration. However, its long-term outcomes under repeated impact–offset cycles remain uncertain. Using a conceptual forest succession model, we evaluated how offset outcomes are affected by interactions among compensation scale, duration of protection, habitat conversion rate, and land availability constraints. Additionally, we considered that these outcomes may differ across biodiversity components, including habitat maturity associated with successional habitat-forming species and metapopulation dynamics of persistent colonizers and successional specialists. We showed that effective offsetting requires restoring areas larger than those impacted and maintaining protection over timescales aligned with ecological recovery, particularly where ongoing habitat conversion reshapes landscape structure. High rates of habitat conversion consistently reduced offsetting success, particularly for colonizing species reliant on habitat quality and long-term protection. Our results further showed that delayed ecological responses and cumulative impacts can undermine offsetting efforts that appear effective in the short term. Robust offset design must therefore explicitly account for temporal lags, dynamic landscape trajectories, adequate spatial compensation, and multiple biodiversity indicators to avoid the ecological fallacy that short-term restoration success equates to long-term biodiversity and ecosystem integrity.
