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進化論が自然基盤インフラ設計に与える影響を分析(Q&A: How evolution influences nature-based infrastructure)

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2026-05-14 ワシントン大学(UW)

米国のUniversity of Washington の研究チームは、都市計画分野における「自然を活用した解決策(Nature-based Solutions: NbS)」とグリーンインフラの発展過程を整理し、気候変動適応や都市環境改善における役割を分析した。研究では、都市緑地、雨水管理、生態回廊、都市森林などの取り組みが、従来のインフラ中心型都市設計から、生態系機能を活用する統合型都市計画へ進化してきた経緯を示した。また、NbSは洪水緩和、ヒートアイランド抑制、生物多様性保全、住民健康向上など複数効果を同時に生み出す一方、導入には土地利用調整、維持管理費用、地域公平性確保などの課題も伴うことが指摘された。研究チームは、気候変動リスク増大に対応するためには、都市インフラと自然生態系を統合的に設計する長期的視点が不可欠であり、政策・工学・生態学を横断した協調的都市計画が求められると提言している。

進化論が自然基盤インフラ設計に与える影響を分析(Q&A: How evolution influences nature-based infrastructure)

Volunteers with the Billion Oyster Project restore oyster habitat along the New York Harbor shoreline. In new research from the University of Washington, researchers explore how evolution can alter nature-based infrastructure projects like this one. Photo: Steven DeWitt/Witness Tree Media

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都市のレジリエンスを高めるための、進化し続ける自然ベースのソリューション Evolving nature-based solutions for urban resilience

Marina Alberti, Nancy B. Grimm, Eric P. Palkovacs, Mark C. Urban, […] , and Yuyu Zhou

Science  Published:14 May 2026

DOI:https://doi.org/10.1126/science.aea9563

Editor’s summary

Cities are hotspots for implementing nature-based solutions such as street trees, rain gardens, green roofs, and restored wetlands to mitigate urban heat, flooding, and pollution. The same stressors that necessitate these nature-based solutions also act as selection agents, yet evolution is rarely considered when designing interventions involving living organisms. In a Review, Alberti et al. synthesized research on eco-evolutionary dynamics in cities and their implications for nature-based solutions. The authors propose design principles based on their findings and suggest future research avenues to test their efficacy. —Bianca Lopez

Abstract

Despite growing investments in nature-based solutions for urban resilience, their design often overlooks a fundamental biological process: evolution. Populations of organisms that sustain nature-based solutions are dynamic and can evolve over time. Rapid evolutionary changes, driven by urban environmental stressors, such as pollution, climate extremes, and habitat fragmentation, can reshape species’ traits, alter interactions, and shift ecosystem functions. We synthesize evidence of evolutionary change across systems that serve as nature-based solutions in urban contexts and show how evolutionary processes can enhance or undermine their performance. We propose four testable hypotheses linking evolutionary dynamics to nature-based solutions and outline design strategies to maintain adaptive potential. Integrating evolution into nature-based solutions is essential to ensure long-term and efficient functionality under accelerating environmental change.

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