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264 results on '"Quine, Timothy A."'

12. Soil functions and ecosystem services research in the Chinese karst Critical Zone

Author

Green, Sophie M., Dungait, Jennifer A.J., Tu, Chenglong, Buss, Heather L., Sanderson, Nicole, Hawkes, Simon J., Xing, Kaixiong, Yue, Fujun, Hussey, Victoria L., Peng, Jian, Johnes, Penny, Barrows, Tim, Hartley, Iain P., Song, Xianwei, Jiang, Zihan, Meersmans, Jeroen, Zhang, Xinyu, Tian, Jing, Wu, Xiuchen, Liu, Hongyan, Song, Zhaoliang, Evershed, Richard, Gao, Yang, and Quine, Timothy A.

Published
2019
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22. Soil Organic Carbon Lateral Movement Processes Integrated Into a Terrestrial Ecosystem Model.

Author

Lu, Haibo, Wang, Xiaoyuan, Zhang, Haicheng, Xie, Xianhong, Nakhavali, Mahdi, Quine, Timothy A., Xu, Wenfang, Xia, Jiangzhou, He, Bin, Hao, Zhixin, Geng, Xiu, and Yuan, Wenping

Subjects
CARBON cycle, DISSOLVED organic matter, CARBON in soils, ECOSYSTEMS, SOIL erosion, COLLOIDAL carbon, WATERSHEDS
Abstract

Lateral movement of soil organic carbon (SOC) induced by soil erosion and runoff changes spatial distributions of SOC, and further changes the land‐atmosphere CO2 exchange and terrestrial carbon budget. However, current ecosystem models do not or only poorly integrate the process of SOC lateral movement and cannot simulate the impacts of soil erosion on the carbon cycle. This study integrated SOC erosion and deposition processes into a process‐based ecosystem model (i.e., Integrated BIosphere Simulator (IBIS)), and separately simulated the lateral movements of dissolved organic carbon (DOC) and particulate organic carbon (POC). The model was evaluated in three river basins in Northeast China that are dominated by cropland, forest, and grassland. The results showed that the model reproduced well the production, erosion, and deposition of DOC and POC. The annual SOC lateral movement (1.34–7.22 g C m−2 yr−1) induced by erosion in the three tested basins was 0.27%–1.45% of the annual net primary production. The model developed in this study has great implications for simulating the lateral movements of SOC in terrestrial ecosystems, which can improve model performance in projecting the terrestrial carbon budget. Plain Language Summary: Lateral movement of soil organic carbon (SOC) with soil erosion and runoff is an important process in estimating land carbon budget. However, the current ecosystem models are not or poorly integrated this process, and cannot simulate the impacts of lateral movement of SOC on carbon cycle. This study integrates SOC erosion and deposition processes into a process‐based ecosystem model (Integrated BIosphere Simulator (IBIS)), and separately simulates the lateral movements of dissolved organic carbon (DOC) and particulate organic carbon (POC). The model was evaluated at three river basins in Northeast China dominated by cropland, forest and grassland, respectively. The results showed the model can reproduce well the production, erosion, deposition of DOC and POC. The model developed in this study has great implications for simulating the lateral movements of SOC in terrestrial ecosystem, which can improve model performance on projecting terrestrial carbon budget. Key Points: Current ecosystem models inadequately depict the lateral movement of SOC, causing uncertainties in terrestrial carbon cycle modelingWe integrated SOC erosion and deposition into a process‐based ecosystem model and evaluated it in three Chinese river basinsModel simulations well represented observed data for the production, erosion, and deposition of organic carbon [ABSTRACT FROM AUTHOR]

Published
2024
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26. Temperature effect on erosion-induced disturbances to soil organic carbon cycling

Author

National Natural Science Foundation of China, Ministerio de Ciencia e Innovación (España), Navas Izquierdo, Ana [0000-0002-4724-7532], Wang, Zhengang, Zhang,Yizhe, Govers, Gerard, Tang, Guoping, Quine, Timothy A., Qiu, Jianxiu, Navas Izquierdo, Ana, Fang, Haiyan, Tan, Qian, Van Oost, Kristof, National Natural Science Foundation of China, Ministerio de Ciencia e Innovación (España), Navas Izquierdo, Ana [0000-0002-4724-7532], Wang, Zhengang, Zhang,Yizhe, Govers, Gerard, Tang, Guoping, Quine, Timothy A., Qiu, Jianxiu, Navas Izquierdo, Ana, Fang, Haiyan, Tan, Qian, and Van Oost, Kristof

Abstract

Erosion exerts control on soil organic carbon (SOC) and both erosion and SOC are affected by climate. To what extent temperature controls the coupling between these erosion–C interactions remains unclear. Using 137Cs and SOC inventories from catchments spanning different climates, we find that increasing decomposition rates with temperature result in the efficient replacement of SOC laterally lost by erosion in eroding areas but lower preservation of deposited SOC in depositional areas. When combined at the landscape level, the erosion-induced C sink strength per unit lateral SOC flux increases with temperature from 0.19 g C (g C)−1 at 0 °C to 0.24 g C (g C)−1 at 25 °C. We estimated that the global C sink of 0.050 Pg C yr−1 induced by water erosion on croplands increases by 7% because of climate change. Our results reveal a negative feedback loop between climate change and erosion-induced disturbance to SOC cycling.

Published
2023

34. Testing the utility of structure‐from‐motion photogrammetry reconstructions using small unmanned aerial vehicles and ground photography to estimate the extent of upland soil erosion

Author

Glendell, Miriam, McShane, Gareth, Farrow, Luke, James, Mike R., Quinton, John, Anderson, Karen, Evans, Martin, Benaud, Pia, Rawlins, Barry, Morgan, David, Jones, Lee, Kirkham, Matthew, DeBell, Leon, Quine, Timothy A., Lark, Murray, Rickson, Jane, and Brazier, Richard E.

Published
2017
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39. Effects of Afforestation on Soil Carbon and Nitrogen Accumulation Depend on Initial Soil Nitrogen Status.

Author

Songbai Hong, Nan Cong, Jinzhi Ding, Shilong Piao, Lingli Liu, Peñuelas, Josep, Anping Chen, Quine, Timothy A., Hui Zeng, and Houlton, Benjamin Z.

Subjects
AFFORESTATION, NITROGEN in soils, CARBON in soils, VESICULAR-arbuscular mycorrhizas, CLIMATE change, SOIL sampling, SOIL dynamics
Abstract

Long-term carbon (C) sequestration in terrestrial vegetation and soil is mediated by soil nitrogen (N) supply. Afforestation is regarded as a global-scale solution to climate change; thus, resolving the role of N in either facilitating or reducing the long-term C benefits of this practice has essential implications to maximize its C sink potential. The impacts of afforestation on soil C, N, and their stoichiometric ratio have been widely explored but what regulates these impacts remains unclear at regional and global scales. In this study, we conducted an intensive field sampling investigation including 610 pairs of afforested and control plots in northern China and extensively compiled a global data set containing 211 afforested-control pairs worldwide to evaluate responses of soil N concentrations and C:N ratios to afforestation and further explored their major regulator. We identified a soil N threshold, the inflection point where afforestation changes from increasing to decreasing soil C and N, which was 0.86 (95% CI: 0.81–0.91) kg N m−2 in 0–1 m depth. Changes in soil C:N ratios with afforestation were mediated by initial relative abundance of soil C and N and types of mycorrhiza associated with planted trees. Increases in soil C:N were mostly driven by trees with ectomycorrhizal associations but did not change for those associated with arbuscular mycorrhizal fungi. These results provide a data-based understanding on soil C and N dynamics following afforestation and its underlying mechanisms and further highlight the importance of site selection based on initial soil properties in future afforestation. [ABSTRACT FROM AUTHOR]

Published
2023
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44. Comparing machine learning-derived global estimates of soil respiration and its components with those from terrestrial ecosystem models

Author

Lu, Haibo, primary, Li, Shihua, additional, Ma, Minna, additional, Bastrikov, Vladislav, additional, Chen, Xiuzhi, additional, Ciais, Philippe, additional, Dai, Yongjiu, additional, Ito, Akihiko, additional, Ju, Weimin, additional, Lienert, Sebastian, additional, Lombardozzi, Danica, additional, Lu, Xingjie, additional, Maignan, Fabienne, additional, Nakhavali, Mahdi, additional, Quine, Timothy, additional, Schindlbacher, Andreas, additional, Wang, Jun, additional, Wang, Yingping, additional, Wårlind, David, additional, Zhang, Shupeng, additional, and Yuan, Wenping, additional

Published
2021
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45. Supplemental Material, Additional_Information_PPG-20-017-new_ersion - Understanding the relationships between ecosystem services and associated social-ecological drivers in a karst region: A case study of Guizhou Province, China

Author

Hongyan Liu, Peng, Jian, Sijing Qiu, Jianquan Dong, Xiaoyu Wang, Zihan Ding, Hanbing Zhang, Mao, Qi, Quine, Timothy A, and Meersmans, Jeroen

Subjects
FOS: Social and economic geography, Geography, 120599 Urban and Regional Planning not elsewhere classified
Abstract

Supplemental Material, Additional_Information_PPG-20-017-new_ersion for Understanding the relationships between ecosystem services and associated social-ecological drivers in a karst region: A case study of Guizhou Province, China by Sijing Qiu, Jian Peng, Jianquan Dong, Xiaoyu Wang, Zihan Ding, Hanbing Zhang, Qi Mao, Hongyan Liu, Timothy A Quine and Jeroen Meersmans in Progress in Physical Geography: Earth and Environment

Published
2021
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