Impacts of Landscape Evolution on Heterotrophic Carbon Loss in Intensively Managed Landscapes

Soil respiration that releases CO2 into the atmosphere roughly balances the net primary productivity and varies widely in space and time. However, predicting its spatial variability, particularly in intensively managed landscapes, is challenging due to a lack of understanding of the roles of soil or...

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Autores principales:	Qina Yan, Praveen Kumar
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	heterotrophic carbon loss soil organic carbon landscape evolution soil erosion soil deposition soil respiration Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/50723a3a7f07455d876cc8c3d3ad1b7d
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spelling	oai:doaj.org-article:50723a3a7f07455d876cc8c3d3ad1b7d2021-11-16T07:46:00ZImpacts of Landscape Evolution on Heterotrophic Carbon Loss in Intensively Managed Landscapes2624-937510.3389/frwa.2021.666278https://doaj.org/article/50723a3a7f07455d876cc8c3d3ad1b7d2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/frwa.2021.666278/fullhttps://doaj.org/toc/2624-9375Soil respiration that releases CO2 into the atmosphere roughly balances the net primary productivity and varies widely in space and time. However, predicting its spatial variability, particularly in intensively managed landscapes, is challenging due to a lack of understanding of the roles of soil organic carbon (SOC) redistribution resulting from accelerated soil erosion. Here we simulate the heterotrophic carbon loss (HCL)—defined as microbial decomposition of SOC—with soil transport, SOC surface redistribution, and biogeochemical transformation in an agricultural field. The results show that accelerated soil erosion extends the spatial variation of the HCL, and the mechanical-mixing due to tillage further accentuates the contrast. The peak values of HCL occur in areas where soil transport rates are relatively small. Moreover, HCL has a strong correlation with the SOC redistribution rate rather than the soil transport rate. This work characterizes the roles of soil and SOC transport in restructuring the spatial variability of HCL at high spatio-temporal resolution.Qina YanPraveen KumarPraveen KumarFrontiers Media S.A.articleheterotrophic carbon losssoil organic carbonlandscape evolutionsoil erosionsoil depositionsoil respirationEnvironmental technology. Sanitary engineeringTD1-1066ENFrontiers in Water, Vol 3 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	heterotrophic carbon loss soil organic carbon landscape evolution soil erosion soil deposition soil respiration Environmental technology. Sanitary engineering TD1-1066
spellingShingle	heterotrophic carbon loss soil organic carbon landscape evolution soil erosion soil deposition soil respiration Environmental technology. Sanitary engineering TD1-1066 Qina Yan Praveen Kumar Praveen Kumar Impacts of Landscape Evolution on Heterotrophic Carbon Loss in Intensively Managed Landscapes
description	Soil respiration that releases CO2 into the atmosphere roughly balances the net primary productivity and varies widely in space and time. However, predicting its spatial variability, particularly in intensively managed landscapes, is challenging due to a lack of understanding of the roles of soil organic carbon (SOC) redistribution resulting from accelerated soil erosion. Here we simulate the heterotrophic carbon loss (HCL)—defined as microbial decomposition of SOC—with soil transport, SOC surface redistribution, and biogeochemical transformation in an agricultural field. The results show that accelerated soil erosion extends the spatial variation of the HCL, and the mechanical-mixing due to tillage further accentuates the contrast. The peak values of HCL occur in areas where soil transport rates are relatively small. Moreover, HCL has a strong correlation with the SOC redistribution rate rather than the soil transport rate. This work characterizes the roles of soil and SOC transport in restructuring the spatial variability of HCL at high spatio-temporal resolution.
format	article
author	Qina Yan Praveen Kumar Praveen Kumar
author_facet	Qina Yan Praveen Kumar Praveen Kumar
author_sort	Qina Yan
title	Impacts of Landscape Evolution on Heterotrophic Carbon Loss in Intensively Managed Landscapes
title_short	Impacts of Landscape Evolution on Heterotrophic Carbon Loss in Intensively Managed Landscapes
title_full	Impacts of Landscape Evolution on Heterotrophic Carbon Loss in Intensively Managed Landscapes
title_fullStr	Impacts of Landscape Evolution on Heterotrophic Carbon Loss in Intensively Managed Landscapes
title_full_unstemmed	Impacts of Landscape Evolution on Heterotrophic Carbon Loss in Intensively Managed Landscapes
title_sort	impacts of landscape evolution on heterotrophic carbon loss in intensively managed landscapes
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/50723a3a7f07455d876cc8c3d3ad1b7d
work_keys_str_mv	AT qinayan impactsoflandscapeevolutiononheterotrophiccarbonlossinintensivelymanagedlandscapes AT praveenkumar impactsoflandscapeevolutiononheterotrophiccarbonlossinintensivelymanagedlandscapes AT praveenkumar impactsoflandscapeevolutiononheterotrophiccarbonlossinintensivelymanagedlandscapes
_version_	1718426601771761664

Impacts of Landscape Evolution on Heterotrophic Carbon Loss in Intensively Managed Landscapes

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