エコエンジニアリング沿岸構造物における海藻由来ブルーカーボンのポテンシャル
Seaweed-based blue carbon potential of eco-engineered coastal structures (原題)
Franz Bauer, Louise B. Firth, Antony M. Knights, John N. Griffin, Andy Foggo, Austin Brown, Mick E. Hanley
🤖 gxceed AI 要約
日本語
生態工学的手法で地形複雑性を高めた護岸パネルは、平坦面に比べ海藻バイオマス由来のブルーカーボン貯留が最大19倍に増加した。しかし2年時点ではパネルのCO2排出が吸収を3〜64倍上回り、20年の設計寿命内でカーボンニュートラル達成は非現実的だった。低炭素コンクリートと建設時一体施工、最適地形を組み合わせれば15〜32年で中立到達し得ると予測する。
English
Eco-engineered seawall panels with topographic complexity supported up to 19-fold greater seaweed blue carbon storage than flat surfaces. Yet panel CO2 emissions exceeded captures 3- to 64-fold after two years, and no retrofit reached carbon neutrality within a 20-year design life. Predictive modeling suggests low-carbon concrete, integrated construction, and optimal topography could achieve neutrality in 15-32 years.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
国内でも港湾・護岸のグリーンインフラ整備が進む中、インフラ自体の炭素収支を定量化する視点は、建設業のScope 3や自治体の気候対策計画に示唆を与える。ブルーカーボンはJ-クレジット制度でも注目されており、生態系サービスと炭素会計を結びつける実証として参考になる。
In the global GX context
As nature-based solutions enter ISSB/CSRD disclosure and biodiversity frameworks (TNFD), this paper offers rare quantified evidence that green infrastructure's carbon benefits must be weighed against embodied emissions. It cautions against overclaiming blue carbon credits from eco-engineered structures without lifecycle accounting.
👥 読者別の含意
🔬研究者:生態工学インフラの炭素収支をライフサイクルで定量化する手法と限界を示す実証研究として有用。
🏢実務担当者:沿岸・港湾インフラの脱炭素設計で、ブルーカーボン便益を過大評価せず低炭素コンクリート採用を検討する根拠になる。
🏛政策担当者:グリーンインフラやブルーカーボンクレジット制度設計で、吸収量と内包排出の純収支評価を要件化する必要性を示す。
📄 Abstract（原文）
Natural coastal ecosystems hold substantial capacity for blue carbon storage, but habitat replacement with harbour and shoreline infrastructure has severely diminished their potential to mitigate climate change. Enhancement of topographic complexity on coastal infrastructure through eco-engineering can increase biota abundance, such as the standing stock of long-lived seaweeds, thus positively impacting carbon capture and mitigating the carbon footprint of concrete-based infrastructure. However, ecosystem services of eco-engineered structures remain largely unquantified. Here, we assessed the seaweed biomass on a large-scale, eco-engineered seawall and show that topographically complex panels supported up to 19-fold greater blue carbon storage than flat surfaces. However, estimated panel CO 2 emissions exceeded CO 2 captures by 3- to 64-fold, after two years of seaweed growth. No retrofitted panel was realistically expected to achieve carbon neutrality within its 20-year design life, despite seaweed turnover and sequestration supporting long-term blue carbon potential. Predictive calculations, using six topographic designs, four concrete mixtures, two installation scenarios, and two detritus sequestration rates, suggested that the most efficient topography for seaweed growth, produced from low-carbon concrete and integrated during the construction phase, may achieve carbon neutrality within 15-32 years. Less effective or less sustainable scenarios were expected to require 52-277 years until carbon neutrality. An active transition towards low-carbon, integrated designs is necessary to align biodiversity-focused thinking in green infrastructure design with broader principles of sustainability and climate change mitigation.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.jenvman.2026.131240first seen 2026-10-26 04:49:25 · last seen 2026-11-06 04:55:16
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