温帯砂地における砂漠化防止と炭素隔離：シナジーとトレードオフ

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:乾燥地における砂漠化防止と炭素隔離の空間的ミスマッチと時間遅延を定量化する手法（ESAI×SOCクロス分類）が参考になる。

🏢実務担当者:植林・NbSベースのカーボンオフセット調達時に、土壌水分制約や炭素隔離の遅延をデューデリジェンス項目として考慮すべき根拠となる。

🏛政策担当者:乾燥地の空間計画では植生被覆率だけでなく土壌水分制約と干ばつ早期警報を組み込んだ差別化型NbSが不可欠という政策的示唆。

While land desertification control (SDG 15.3) and climate change mitigation (SDG 13) are generally considered synergistic, their trade-offs in heavily human-modified temperate monsoon sandy ecosystems remain unclear. Focusing on the southern margin of China's Horqin Sandy Land, this study quantified the spatiotemporal synergies and trade-offs between desertification control and carbon sequestration (2000−2020) using a cross-classification matrix coupling an improved Mediterranean Desertification and Land Use (MEDALUS)-Environmentally Sensitive Area Index (ESAI) with soil organic carbon (SOC) dynamics. Results indicate: (1) A spatially divergent pattern emerged. The central-western sandy lands successfully established an extensive resilient baseline (“Stable”), interspersed with localized carbon accumulation patches (“Synergy”). Conversely, the southeastern agro-pastoral ecotone suffered a contiguous “Double loss” (heightened environmental sensitivity and carbon depletion), spatially corresponding to agricultural intensification and potential groundwater overdraft. (2) In some marginal ecotones, patches with reduced desertification sensitivity exhibited constrained soil carbon accumulation. This spatial mismatch suggests that early high-density afforestation might have exceeded local soil moisture carrying capacities, posing a hidden “green desert” risk that overdraws long-term ecological resilience. (3) Zones subject to severe composite wind-water erosion frequently overlapped with delayed SOC responses despite observed surface ecological improvements (a potential “time-lag” effect). This alignment indicates that erosion likely compromises the physical soil carbon protection, delaying the translation of ecological recovery into long-term carbon sinks. Consequently, dryland spatial planning should move beyond focusing solely on apparent vegetation coverage. Adopting differentiated Nature-based Solutions (NbS) governed by strict soil moisture constraints and drought early-warning systems is essential to achieve SDG synergies in global drylands.

• openalex https://doi.org/10.1016/j.ecolind.2026.115792first seen 2026-11-05 05:05:26 · last seen 2026-11-06 04:46:34