Soil Organic Carbon Stocks and Vertical Distribution in Upland and Floodplain Forests of Thorn Creek, Northeastern Illinois

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

🔬研究者:Provides comparative data on SOC stocks in different forest types, useful for carbon cycle modeling.

🏢実務担当者:Offers insights for land managers on carbon sequestration potential of floodplain vs. upland forests.

🏛政策担当者:Supports evidence-based policy for forest conservation and restoration as climate mitigation strategies.

土壌有機炭素（SOC）は、土壌の健康度、肥沃度、および生態系生産性の主要な指標である。それは栄養循環、保水性、土壌構造の形成、および微生物活動において中心的な役割を果たす一方、炭素隔離を通じた気候調整にも貢献している。SOCの増加は、侵食や干ばつに対する土壌の回復力を高め、持続可能な土地管理に不可欠である。森林生態系において、SOCの動態を理解することは、気候変動の緩和と持続可能な資源利用を目的とした科学的根拠に基づく政策と管理戦略の策定にとって極めて重要である。しかし、高地林と氾濫原林の間のSOC貯留量に関する比較情報は依然として限られている。本研究では、イリノイ州北東部のソーンクリーク沿いの高地林と氾濫原林において、SOC貯留量とその垂直分布を調査した。土壌試料は3つの深度（0-15、15-30、30-45 cm）で採取された。土壌有機炭素濃度はWalkley-Black重クロム酸湿式酸化法を用いて測定され、土壌かさ密度は金属製コアサンプリング缶を用いて測定され、SOC貯留量の算出に供された。結果は、総SOC貯留量が高地林（80.1 Mg ha⁻¹）よりも氾濫原林（100.7 Mg ha⁻¹）で有意に高いことを示した。しかし、土壌プロファイルに沿ったSOCの垂直分布パターンには、2つの森林タイプ間で有意な差は観察されなかった。土壌水分含量は、統計的に有意な差ではなかったものの、一般的に高地林よりも氾濫原林で高かった。これらの知見は、対照的な森林タイプ間でのSOC貯留の理解を深め、森林生態系管理と気候変動緩和戦略のための科学的根拠を提供する。

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Soil organic carbon (SOC) is a key indicator of soil health, fertility, and ecosystem productivity. It plays a central role in nutrient cycling, water retention, soil structure formation, and microbial activity, while also contributing to climate regulation through carbon sequestration. Increasing SOC enhances soil resilience to erosion and drought, making it essential for sustainable land management. In forest ecosystems, understanding SOC dynamics is critical for developing science-based policies and management strategies aimed at climate change mitigation and sustainable resource use. However, comparative information on SOC stocks between upland and floodplain forests remains limited. In this study, SOC stocks and their vertical distribution were investigated in upland and floodplain forests along Thorn Creek in northeastern Illinois. Soil samples were collected at three depths (0-15, 15-30, and 30-45 cm). Soil organic carbon concentrations were determined using the Walkley-Black chromic acid wet oxidation method, and soil bulk density was measured using metal core sampling cans to calculate SOC stocks. Results showed that total SOC stocks were significantly higher in floodplain forests (100.7 Mg ha⁻¹) than in upland forests (80.1 Mg ha⁻¹). However, no significant differences were observed in the vertical distribution pattern of SOC along the soil profile between the two forest types. Soil water content was generally higher in floodplain forests than in upland forests, although the difference was not statistically significant. These findings improve our understanding of SOC storage across contrasting forest types and provide a scientific basis for forest ecosystem management and climate change mitigation strategies.

• openalex https://opus.govst.edu/research_day/2026/fri/23first seen 2026-05-05 19:10:49