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欧州の野生海藻生態系に関する現在の証拠がブルーカーボン会計に適しているかの評価

An assessment of the suitability of current evidence on European wild seaweed ecosystems for blue carbon accounting (原題)

Ana Julieth Calderón Márquez, Beatrice Smyth, Dan A Smale, Michele Stanley, Pamela Walsh

Annals of Botany📚 査読済 / ジャーナル2026-07-23#炭素会計Origin: EU対象セクター: cross_sector
DOI: 10.1093/aob/mcag230
原典: https://doi.org/10.1093/aob/mcag230

🤖 gxceed AI 要約

日本語

本レビューは、欧州の野生海藻生態系に関する16の実証研究を、永続性・MRV可能性・正味気候便益の3つの基準で評価した。その結果、政策グレードの会計に適合する証拠はなく、保全優先の予防的アプローチを支持する。将来の研究は、炭素貯留の永続性とモニタリング手法の拡張性に焦点を当てるべきである。

English

This review evaluates 16 empirical studies on European wild seaweed ecosystems against three criteria: permanence, MRV feasibility, and net climate benefit. It finds no evidence meets policy-grade accounting standards, supporting a precautionary, conservation-led approach. Future research should focus on carbon storage permanence and scalable monitoring methods.

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

日本ではブルーカーボン生態系として海藻場が注目され、Jブルークレジット制度が始まっている。本論文は、海藻の炭素貯留の永続性やMRVの課題を整理しており、日本の制度設計や企業のクレジット活用に慎重な検討を促す示唆を与える。

In the global GX context

Globally, blue carbon accounting frameworks are expanding, but seaweed remains contentious. This paper provides a rigorous evidence-based assessment that informs international policy debates, cautioning against premature inclusion of wild seaweed in carbon accounting until permanence and MRV challenges are resolved.

👥 読者別の含意

🔬研究者:Provides a structured framework for evaluating blue carbon evidence and identifies research gaps in permanence and MRV.

🏢実務担当者:Highlights the limitations of current seaweed carbon credits, guiding corporate decisions on blue carbon investments.

🏛政策担当者:Supports a precautionary approach to including seaweed in carbon accounting frameworks, emphasizing conservation.

📄 Abstract（原文）

BACKGROUND: Blue carbon has become an important component of climate mitigation policy, integrating selected coastal ecosystems into greenhouse gas accounting frameworks. With their high productivity and large spatial extent, seaweed ecosystems have recently entered this debate, particularly in Europe where interest in seaweed-based climate strategies is expanding. However, it remains uncertain whether the evidence currently available for wild seaweed ecosystems meets the standards required for inclusion in formal blue carbon accounting. SCOPE: This review systematically assesses empirical evidence from European wild seaweed ecosystems. Sixteen empirical studies were evaluated using a structured classification framework based on three accounting-relevant pillars: permanence, defined as carbon storage exceeding 100 years; the feasibility of monitoring, reporting, and verification; and demonstrable net climate benefit after accounting for losses and variability. Review and policy literature were examined to contextualise these findings. CONCLUSIONS: No current wild seaweed ecosystem evidence consistently satisfied all three pillars for policy-grade accounting. Evidence for durable carbon storage was limited and highly context-specific. Monitoring approaches were generally site-based and not readily scalable to inventory-level reporting, while net climate benefit was frequently reduced or offset by greenhouse gas emissions and temporal variability. These findings highlight a mismatch between seaweed carbon dynamics, the current evidence base, and accounting requirements. The findings support a precautionary policy approach that prioritises conservation-led management of wild seaweed ecosystems. Current evidence does not yet support their inclusion in blue carbon accounting frameworks and indicates that future research should address permanence, monitoring, reporting and verification feasibility, and net climate benefit.

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