エクアドルアンデスにおける土地利用変化が土壌有機炭素蓄積と潜在的CO2換算排出量に与える影響
Land-use change effects on soil organic carbon stocks and potential CO2-equivalent emissions in the Ecuadorian Andes (原題)
Diego Armando Damián-Carrión, Magdy Echeverría-Guadalupe, Carla Fernanda Silva-Padilla, Freddy Armijos-Arcos, Fernanda Rivera-Castillo, Agustı́n Merino, Xosé L. Otero
🤖 gxceed AI 要約
日本語
エクアドルアンデス中央高地において、自然生態系（パラモ草原・原生林）と人為的土地利用（農地・牧草地・外来樹種植林）の土壌有機炭素（SOC）蓄積量を144試料で比較した。自然生態系のSOCは有意に高く、土地利用変化により平均88.1 Mg C/ha（323 Mg CO2-eq/ha相当）が失われた。IPCC推奨のストック差分法と多時期土地利用データを組み合わせ、地域規模の潜在的CO2換算排出量を推計した。
English
Comparing 144 soil samples across natural (paramo, native forest) and converted land uses (cropland, pasture, exotic plantations) in the Ecuadorian Andes, natural ecosystems held significantly higher soil organic carbon. Land-use change was associated with a mean SOC loss of 88.1 Mg C/ha (323 Mg CO2-eq/ha). Using the IPCC stock-difference approach with multitemporal land-use data, the authors estimated substantial potential CO2-equivalent emissions at local and regional scales.
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
日本企業のGX開示に直接関わる内容ではないが、Scope 3上流の土地利用由来排出や自然資本・生物多様性（TNFD）評価、サプライチェーン調達リスクの基礎データとして参考になる。
In the global GX context
Adds empirical evidence on land-use-driven soil carbon loss relevant to land-sector accounting, nature-related disclosure (TNFD), and supply-chain land-use emissions, though it sits outside mainstream TCFD/ISSB corporate disclosure frameworks.
👥 読者別の含意
🔬研究者:高地アンデス生態系のSOC感度とIPCCストック差分法の適用例として、土地利用由来排出推計の方法論的参照になる。
🏢実務担当者:農産物・林産物調達に関わる企業が、土地利用変化由来の上流排出・自然資本リスクを把握する基礎情報として活用できる。
🏛政策担当者:土地利用政策や気候緩和戦略において、土壌炭素保全を排出削減策として位置づける根拠を提供する。
📄 Abstract（原文）
Soil organic carbon (SOC), the second largest carbon reservoir at the Earth’s surface, plays a key role in climate regulation and ecosystem functioning by supporting biodiversity, regulating hydrological processes, and maintaining soil structure and fertility. Land-use change, however, can substantially reduce SOC stocks, contributing to soil degradation and the loss of ecosystem services. In this study, we quantified SOC stocks and estimated associated potential CO 2 -equivalent emissions across contrasting land-use types in the central highlands of the Ecuadorian Andes. A total of 144 soil samples were collected from natural ecosystems (paramo grasslands and native forests) and anthropogenically transformed land uses (croplands, pastures, and exotic forest plantations of pine and eucalyptus). SOC stocks were significantly higher in natural ecosystems than in transformed land uses. These differences were associated with a mean SOC loss of 88.1 Mg C ha −1 following land-use change, equivalent to 323 Mg CO 2 -eq ha −1 . Using the IPCC-recommended stock-difference approach combined with multitemporal land-use data, substantial potential CO 2 -equivalent emissions associated with land-use conversion were estimated at local and regional scales. These estimates represent potential emissions resulting from the loss of SOC reserves, rather than direct measurements of soil CO 2 fluxes, and are subject to uncertainty associated with spatial soil variability, land-use classification, and the conversion of soil organic matter to SOC. However, the magnitude of the estimated losses demonstrates the high sensitivity of high-Andean SOC reservoirs to land-use change and underscores their crucial importance for developing climate change mitigation strategies.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3389/sjss.2026.17377first seen 2026-10-03 04:48:05
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