The spatial variability of temporal changes in soil organic carbon and its drivers in a mountainous agricultural region of China

CATENA, Journal Year: 2024, Volume and Issue: 246, P. 108402 - 108402

Published: Sept. 19, 2024

Language: Английский

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How Land Use Transitions Contribute to the Soil Organic Carbon Accumulation from 1990 to 2020

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(7), P. 1308 - 1308

Published: April 8, 2024

Soil organic carbon stock (SOCS) changes caused by land use are still unclear, and understanding this response is essential for many environmental policies management practices. In study, we investigated the temporal–spatial vertical distribution characteristics of SOCS in Western Sichuan Plateau (WSP) using sparrow search algorithm–random forest regression (SSA-RFR) models with excellent model applicability accuracy. The variations were modeled 1080 soil samples a set nine covariates. We analyzed effect on WSP. total increased 18.03 Tg C from 1990 to 2020. results study confirmed significant increase area since 2010. There was 27.88 2020 compared found that spatial southeast northwest, decreased increasing depth. Forests grasslands main sources grassland accounted 37.53 59.39% (SOC) pool 2020, respectively. expansion wetlands, forest, areas could area. A timely accurate dynamics SOC crucial developing effective strategies enhance sequestration mitigate degradation.

Language: Английский

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Spatial distribution pattern and influence path of soil carbon and nitrogen in the Heihe River source region, northeast Qinghai-Tibet Plateau

Ecological Indicators, Journal Year: 2024, Volume and Issue: 165, P. 112181 - 112181

Published: May 30, 2024

The Qinghai-Tibet Plateau (QTP) is critical for global carbon and nitrogen cycling sequestration because of its sensitive positive response to warming. Although the factors affecting soil in sophisticated mountainous terrain QTP have been extensively investigated, specific "direct" or "indirect" roles their influence path remain unclear. In this study, patterns total contents (STC) (STN) were examined based on 445 samples collected from 89 plots Heihe River source region, northeastern QTP. objective elucidate interactions driving mechanisms among climate, vegetation, geographical environmental factors, properties STC/STN. We found; (1) notable differences STC/STN between altitudinal gradients LULC types, exhibiting an overall increasing trend, followed by a decreasing trend with increase altitude; (2) 0–50 cm layer declined as depth increased, such that distinctive "surface aggregation" characteristics confirmed. general, regions higher densities (STCD) (STND) concentrated southeast watershed, whereas lower identified northwest. (3) Soil water content (SWC) bulk density (BD) are distributing Among significant influencing STC, SWC had maximum direct coefficient (0.42), suggesting effect. Other land-use land-cover change (LULC), BD, pH, normalized difference vegetation index (NDVI) affected STC via wide variety pathways. For STN, (0.46), pH (−0.2) showed coefficients magnitudes greater than indirect coefficients, effects. Moreover, NDVI, precipitation STN through other factors. These findings provide insights into dynamics alpine under terrain. They valuable support studying cycling, evaluating stocks cold regions.

Language: Английский

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The construction of international wetland urban ecological security pattern coupled with MSPA and ESF

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(51), P. 61162 - 61180

Published: Oct. 15, 2024

Language: Английский

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Multidimensional effects of arable soil organic carbon distribution: a comparison among terrains

Journal of Soils and Sediments, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Language: Английский

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