北海およびバルト海における炭素の保持構造
Retentive structures of carbon in the North and Baltic Seas (原題)
Marcus Schulz, Tobias Dolch, Stephanie Helber, Thomas Raabe, Eva B. Reiter, Nico Stelljes
🤖 gxceed AI 要約
日本語
北海・バルト海の4つの底生ハビタット（海草藻場、潮下帯堆積物、生物起源礁、大型藻類林）を炭素保持構造として評価した研究。炭素の大部分は潮下帯堆積物に埋没するが、恒久的なシンクはノルウェー海溝などごく一部の深場に限られる。海草藻場は堆積物捕捉に優れるものの面積が小さく地域収支への寄与は限定的で、ムール貝礁の純ソース／シンク性は未解明のままである。富栄養化や気候変動の役割解明には調和のとれたモニタリングが必要と結論づける。
English
This study assesses four benthic habitats—seagrass meadows, subtidal sediments, biogenic reefs, and macroalgal forests—as carbon-retentive structures in the North and Baltic Seas. Most retained carbon is buried in subtidal sediments, yet only a few deep areas act as permanent sinks; seagrass contributes little to regional budgets due to small extent, and whether mussel reefs are net sources or sinks remains unresolved. The authors call for harmonized monitoring to close knowledge gaps on eutrophication, climate change, and retention processes.
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
ブルーカーボンは日本の気候変動対策・生物多様性国家戦略や自治体のカーボンオフセット制度で注目されるが、本論文は地域炭素収支の不確実性を強調し、日本でのブルーカーボン算定・認証の慎重な設計に示唆を与える。
In the global GX context
Blue carbon is increasingly folded into voluntary carbon markets and nature-related disclosure (TNFD), so this paper's caution about uncertain retention rates and net source/sink ambiguity is directly relevant to how marine credits and nature targets are validated globally.
👥 読者別の含意
🔬研究者:底生ハビタット別の炭素保持メカニズムと未解明点を整理する基礎文献として有用。
🏢実務担当者:ブルーカーボンクレジットやTNFD開示で海洋生態系を扱う際、シンクの恒久性・算定不確実性の留意点を提供する。
🏛政策担当者:海洋炭素隔離を気候政策に組み込む際、調和モニタリング体制整備の必要性を示す。
📄 Abstract（原文）
In marine systems, carbon is sequestered through both, biological and physical, processes. This study focused on four benthic habitats acting as retentive structures, namely seagrass meadows, subtidal sediments, biogenic reefs and macroalgal forest, in the North and Baltic Seas. In both seas, large-scale losses of seagrass meadows, mussel reefs, and algal forests occurred in the 20th century. Multiple stressors, such as eutrophication, bottom trawling, pollution, overexploitation, and plant disease, led to declines in extensions of the four retentive habitats and thus in carbon sequestration. Major part of the overall retained carbon is buried in subtidal sediments, although only few deep areas, such as the Norwegian Trough, act as effective permanent sinks. Seagrass meadows are efficient in sediment trapping and thus in carbon retention, but due to their small extensions compared to subtidal sediments, their contributions to the overall regional carbon budgets are small. Algal forests are discussed as transient carbon sinks, but contribute to permanent sinks in deep areas by the excretion of fucoidan. Mussel reefs retain organic carbon in forms of faeces and pseudofaeces. Discussion on shell calcification as potential carbon source is ongoing, where it remains unclear whether mussel reefs act as net source or sink of carbon. Knowledge gaps and pronounced variability in carbon retention rates impede the calculation of regional carbon budgets. Bridging knowledge gaps on the role of eutrophication and climate change, and the functioning of carbon retention processes requires harmonized monitoring, as it is under development in Germany.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1139/er-2026-0043first seen 2026-11-07 05:02:28
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