国境を越えるアル＝フウェザ湿原の政策決定を導くための炭素・生態系サービスの評価
Valuing Carbon and Ecosystem Services to Guide Policy Decisions for the Transboundary Al-Hwezeh Marsh (原題)
Haider S. Abid, Nadheer A. Fazaa, M. Whittingham, Mahdian Ahmad, Ibrahim Bahr Alolom
🤖 gxceed AI 要約
日本語
イラク南東部・イラン国境の国境横断湿地アル＝フウェザ湿原を対象に、生態系サービスと炭素ストックの経済価値を推計した研究。Costanzaらの枠組みで生態系サービスを約31,462 USD/ha/年と評価し、IPCC Tier1/2で炭素蓄積を算定、EU・UK ETS価格で金銭換算した。1970年代・2008年ラムサール・2025年の3シナリオを比較し、年間サービス価値は約12.6億〜71.5億USD、炭素資産は約2.77〜15.7億USDと推計。長期修復は短期的な資源採掘より累積経済価値が高いと結論する。
English
This study values ecosystem services and carbon stocks for the transboundary Al-Hwezeh Marsh on the Iraq–Iran border. Using the Costanza framework, ecosystem services are estimated at ~31,462 USD/ha/yr, while carbon stocks are assessed via IPCC Tier 1/2 and monetized with EU and UK ETS prices. Across historical, Ramsar (2008), and current (2025) scenarios, annual service values range ~1.26–7.15 bn USD and carbon assets ~2.77–15.7 bn USD. Long-term restoration yields higher cumulative value than short-term extraction.
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
日本企業には直接の接点は薄いが、自然資本・生物多様性の経済評価と炭素価格を用いた資産換算は、TNFD対応やネイチャーポジティブ経営、SSBJの自然関連開示検討に示唆を与える。
In the global GX context
Offers a replicable template for integrating ecosystem-service valuation with IPCC-based carbon stock accounting priced against ETS markets — relevant to TNFD/ISSB nature-related disclosure and to transition finance for restoration projects in emerging markets.
👥 読者別の含意
🔬研究者:湿地・自然資本の経済評価とIPCC炭素会計を統合する手法の実証例として参照できる。
🏢実務担当者:TNFDや自然関連リスク評価で、生態系サービスと炭素資産を金銭換算する際の考え方の参考になる。
🏛政策担当者:越境生態系の修復を炭素価格で正当化する政策評価の枠組みとして注目に値する。
📄 Abstract（原文）
Al-Hwezeh Marsh, a transboundary freshwater wetland in southeastern Iraq at the Iran border, is one of 40 UNESCO World Heritage sites globally designated for both cultural and natural value. Despite this status, the marsh has undergone severe degradation since the 1970s due to upstream regulation of the Tigris and Karkheh Rivers and local economic pressures from oil extraction and agriculture. Cross-border management efforts, coordinated by Bahr Al-Uloom Foundation, aim to promote sustainable restoration. This study supports these efforts by estimating the economic value of ecosystem services and carbon stock under different marsh area scenarios, integrating cultural, natural, and economic dimensions. Using the valuation framework of Costanza et al., ecosystem services were estimated at 31,462 USD ha-1 yr-1. Carbon stocks were assessed using IPCC Tier 1 and Tier 2 approaches and monetized through EU and UK Emissions Trading System (ETS) prices. Three marsh area scenarios were analyzed: historical (1970s), Ramsar site (2008), and current (2025). Total annual ecosystem service values ranged from ∼1.26 billion USD (current) to ∼7.15 billion USD (historical). Carbon storage (Tier 1) ranged between 10.8–61.2 million Mg, valued at ∼2.77–15.7 billion USD (EU ETS) and ∼2.26–12.8 billion USD (UK ETS). Tier 2 estimates were slightly lower. Initial integrated values reached ∼6.42 billion USD, combining annual services with stock assets, with subsequent years expected to transition to lower sequestration-driven rates. Our analysis indicates that long-term restoration yields higher cumulative economic value than short-term natural resource extractive activities. To the best of our knowledge, this study represents the first integrated macroeconomic valuation and IPCC-based multi-tier carbon asset assessment conducted for any ecosystem within Iraq.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.21123/2411-7986.5430first seen 2026-10-21 05:08:30 · last seen 2026-11-06 05:20:41
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