トナカイの長期排除は北方林土壌の炭素貯留を増加させ、難分解性炭素化合物を減少させる
Long-Term Reindeer Exclusion Leads to Higher Carbon Storage and Less Recalcitrant Carbon Compounds in Boreal Forest Soils (原題)
Femke Pijcke, Josua Seitz, Sari Stark, Agnes Alriksson, Daniel B. Metcalfe, Pasi Rautio, Tobias Sparrman, Risto Virtanen, Johan Olofsson
🤖 gxceed AI 要約
日本語
フィンランド北部の乾燥した松林で50年以上トナカイを排除した試験区では、地衣類バイオマスが4.5倍に増加し、土壌有機炭素量が28%増加しました。また、炭素組成がより分解されやすい若い炭素プールにシフトしました。この結果は、放牧管理が土壌炭素貯留と安定性に影響を与えることを示しています。
English
In dry pine forests of northern Finland, over 50 years of reindeer exclusion increased lichen biomass 4.5-fold and soil organic carbon stock by 28%, shifting carbon composition toward more labile compounds. This shows grazing management affects soil carbon storage and stability.
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
日本では北方林の生態系は限定的ですが、土壌炭素貯留のメカニズムは森林管理や土地利用変化の炭素評価に示唆を与えます。特に、生物多様性と炭素貯留のトレードオフを考慮した政策立案に参考になります。
In the global GX context
This study provides empirical evidence on how herbivore management affects soil carbon dynamics, relevant to global climate mitigation strategies and carbon accounting in boreal ecosystems. It highlights the importance of considering land-use and grazing in carbon cycle models.
👥 読者別の含意
🔬研究者:Provides insights into long-term effects of herbivore exclusion on soil carbon quantity and quality, useful for carbon cycle modeling.
🏢実務担当者:May inform land management practices for carbon sequestration in boreal forests, though direct business application is limited.
🏛政策担当者:Relevant for designing land-use policies that balance biodiversity and carbon storage goals.
📄 Abstract（原文）
Abstract Dry and unproductive Scots pine forests in the northern boreal forest zone provide conditions where ground-dwelling lichens can thrive. These lichens are a crucial winter forage for reindeer. Reindeer reduce lichen biomass both by consumption and trampling, leading to cascading effects on microclimate, litter inputs, and soil carbon dynamics. To investigate long-term impacts of reindeer exclusion, we assessed the plant biomass, soil nutrients, and soil organic carbon (SOC) quantity and quality in three dry pine forest sites in northern Finland, where reindeer have been excluded for over 50 years. Within exclosures, lichen biomass was 4.5 times higher and dwarf shrub biomass nearly doubled compared to grazed controls. These vegetation changes were associated with a 33% higher soil moisture and 0.8 °C lower summer soil temperatures at 10 cm depth beneath the thicker lichen mats. The organic layer SOC stock was 28% higher in exclosures. Spectroscopic analysis using 13 C NMR spectroscopy revealed 9.5% higher O-alkyl carbon (carbohydrates) content and lower methoxy (−5.1%), alkyl (−6.9%), and carbonyl (−8.7%) content, reflecting a younger, more labile carbon pool in the exclosures. Despite these changes, soil nutrient concentrations and C:N ratios remained unchanged between treatments, suggesting that altered SOC storage and composition result primarily from increased litter inputs and microclimatic changes. We conclude that in lichen-rich boreal forests, long-term reindeer exclusion enhances SOC stocks and promotes a shift toward more decomposable soil organic matter, with potential implications for carbon stability under changing grazing regimes.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1007/s10021-026-01100-zfirst seen 2026-08-20 04:46:30
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