Divergent Blue Carbon Trajectories in the Yellow River Delta Post‐1976 Diversion: Hydrological Stability and Human Disturbance Contrasts Revealed by Multi‐Source Remote Sensing (1984–2023)
1976年河道変更後の黄河デルタにおけるブルーカーボン軌跡の分岐：多源リモートセンシング（1984-2023）による水文安定性と人為的撹乱の対比 (AI 翻訳)
Mengqian Jiang, Jianchun Li, Zhenfang He, Zhaosheng Wang, Xuanjie Gai, Qingchun Guo, Shaowei Su
🤖 gxceed AI 要約
日本語
黄河デルタを対象に、1984年から2023年までの多源リモートセンシングデータを用いて、1976年の河道変更後のブルーカーボン貯留量の動態を分析。放棄河道域（ゾーンA）と活動的河口域（ゾーンB）で植生・炭素動態が分岐し、水文条件が塩性湿地のブルーカーボン動態を規定することを実証。外来種Spartina alternifloraの侵入が炭素貯留を増加させる一方、人為的撹乱が炭素変動を引き起こすことを示した。
English
Using multi-source remote sensing (1984-2023), this study analyzes blue carbon dynamics in the Yellow River Delta after the 1976 river diversion. It reveals divergent vegetation and carbon trajectories between an abandoned channel zone and an active estuary zone, demonstrating that hydrological conditions regulate blue carbon by governing vegetation cover and succession. The invasive species Spartina alterniflora increased carbon storage in the active zone, while land reclamation and altered hydrology drove fluctuations in the abandoned zone.
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（藻場・干潟・塩性湿地）の保全がカーボンニュートラル戦略の一部として注目されており、Jブルークレジット制度も始まっている。本研究成果は、水文条件と人為的撹乱が炭素貯留に与える影響を示すことで、日本の沿岸生態系管理やブルーカーボンクレジットの算定・検証に示唆を与える。
In the global GX context
Globally, blue carbon ecosystems are increasingly recognized for their climate mitigation potential, with growing interest in blue carbon credits and nature-based solutions. This study provides empirical evidence on how hydrological stability and human disturbance shape blue carbon stocks, informing coastal wetland management and carbon accounting methodologies. The findings on invasive species impacts and spatial reorganization are relevant for global blue carbon assessments and restoration strategies.
👥 読者別の含意
🔬研究者:Provides empirical evidence on hydrological controls of blue carbon dynamics, useful for refining carbon stock models and remote sensing methodologies.
🏢実務担当者:Offers insights for coastal wetland managers and carbon project developers on how hydrological conditions and invasive species affect carbon storage, aiding in project design and monitoring.
🏛政策担当者:Highlights the importance of hydrological management and invasive species control in maintaining blue carbon sinks, relevant for coastal zone policies and climate mitigation strategies.
📄 Abstract（原文）
ABSTRACT Coastal wetlands are critical blue carbon sinks, yet their spatiotemporal dynamics under environmental change remain insufficiently quantified. Taking the Yellow River Delta (YRD) as a natural laboratory, this study synthesizes multi‐source remote sensing data, including optical and radar imagery spanning from 1984 to 2023, to explore the evolution of blue carbon stocks following the 1976 river diversion. Two distinct zones were identified: Zone A, characterized by an abandoned channel and sediment starvation, and Zone B, representing an active estuary with hydrological stability. Results show that: (1) Divergent vegetation trajectories: From 1984 to 2023, distinct vegetation dynamics were observed between the two zones. (2) Divergent carbon trajectories: Between 1984 and 2023, Zone A experienced fluctuations in carbon stocks, ranging from 9.90 × 10 4 t to 407.35 × 10 4 t, primarily due to land reclamation and altered hydrological conditions. In contrast, Zone B maintained a dynamic vegetation equilibrium under stable hydrological inputs, with carbon stocks rising from 33.80 × 10 4 t to 547.01 × 10 4 t. (3) Differential invasion impacts: The invasion of Spartina alterniflora after 2010 significantly increased carbon storage in Zone B by 46.60 × 10 4 t. Conversely, the primary driver in Zone A was the hydrologic alteration following the river diversion, leading to heightened salinization. This condition limited the invasion of Spartina alterniflora . (4) Spatial reorganization: High‐carbon zones transitioned from being concentrated in Phragmites australis ‐dominated riverbanks during 1984–2010 to encompassing Spartina alterniflora ‐invaded areas within Zone B during 2010–2020. In salt marsh wetlands, hydrological conditions act as a critical regulator of blue carbon dynamics, primarily by governing vegetation cover and succession trajectories.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1002/ldr.70842first seen 2026-08-04 04:59:54
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