Long-term remote sensing of salt marsh dynamics and blue carbon burial changes under reclamation and invasion
埋立と侵略下における塩性湿地の動態とブルーカーボン埋蔵量変化の長期リモートセンシング (AI 翻訳)
Wenting Cao, Zhaoyuan Zhang, Yi-Xiang Wang, Shasha Luo, Yining Chen, Niu Li, Xingna Lin, Mengjiao Qin, Qin Liu, HR Zhang
🤖 gxceed AI 要約
日本語
本研究は、1986～2023年のランドサットデータを用いて杭州湾の塩性湿地の長期的な動態と炭素埋蔵量の変化を定量化した。埋立により湿地総面積は60%減少し、侵略的外来種の拡大により年間ブルーカーボン埋蔵量は49%減少した。開発したリモートセンシングフレームワークは、種レベルの継続的なモニタリングを可能にする。
English
This study uses Landsat imagery (1986–2023) to quantify salt marsh dynamics and blue carbon burial in Hangzhou Bay, China. Reclamation reduced wetland area by 60%, and invasive Spartina expansion contributed to a 49% decline in annual blue carbon burial. The remote sensing framework enables continuous species-level monitoring.
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
日本の沿岸域でも埋立や外来種（シナダレスズメガヤ等）による塩性湿地の減少が問題となっており、ブルーカーボン生態系の保全・再生に向けた長期的モニタリング手法として参考になる。特に、SSBJやTCFDに対応した自然関連情報開示（TNFD）において、生態系サービスの定量的評価に活用できる可能性がある。
In the global GX context
Coastal blue carbon ecosystems are increasingly recognized in global climate mitigation strategies (IPCC, UNFCCC). This study provides a scalable framework for monitoring salt marsh dynamics and carbon burial, relevant for countries facing reclamation and invasive species pressures. The methodology can inform national GHG inventories and nature-based solutions (NbS) reporting.
👥 読者別の含意
🔬研究者:A scalable remote sensing framework for long-term monitoring of salt marsh dynamics and blue carbon burial, applicable to other coastal regions.
🏢実務担当者:Methodology for tracking wetland restoration and carbon benefits under reclamation and invasion, useful for corporate natural capital accounting.
🏛政策担当者:Quantifies blue carbon losses from reclamation and invasion, supporting coastal management policies and climate mitigation targets.
📄 Abstract（原文）
Coastal salt marshes are critical blue carbon sinks but are threatened by coastal reclamation and biological invasion. Conventional discrete mapping lacks temporal continuity, limiting assessments of long-term successional pathways and carbon dynamics. We developed an integrated long-term remote sensing framework using the Landsat archive (1986–2023) to quantify salt marsh dynamics and carbon burial in Hangzhou Bay, China. The framework integrates optimal phenological window selection, continuous change detection, and Random Forest classification to generate accurate annual species-level maps. From 1986 to 2023, salt marshes underwent multi-phase transitions, progressing through natural succession to reclamation-driven coastal squeeze and subsequent invasion-led reorganization. Total wetland area declined by 60%, reflecting the net effect of massive reclamation (893.6 km²) against vegetation expansion. Bare mudflats decreased by 73%, native Scirpus mariqueter by 27%, and invasive Spartina alterniflora expanded by 174%. These transitions led to 49% reduction in annual blue carbon burial (from 71.1 to 36.4 Gg C yr−1). Despite recent invasive expansion and stricter reclamation controls, carbon burial recovery remained limited, reflecting the reclamation’s dominant influence on long-term losses. This study provides a scalable framework for continuous monitoring of salt marsh dynamics and quantifies carbon burial responses to anthropogenic and biological pressures in highly modified estuarine ecosystems.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.6084/m9.figshare.32560124first seen 2026-06-17 06:05:18 · last seen 2026-06-17 09:17:09
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