气候变化领域集成服务门户(CCPortal): Inexorable land degradation due to agriculture expansion in South American Pampa

CCPortal

DOI	10.1038/s41893-023-01074-z
	Inexorable land degradation due to agriculture expansion in South American Pampa
	Foucher, Anthony; Tassano, Marcos; Chaboche, Pierre-Alexis; Chalar, Guillermo; Cabrera, Mirel; Gonzalez, Joan; Cabral, Pablo; Simon, Anne-Catherine; Agelou, Mathieu; Ramon, Rafael; Tiecher, Tales; Evrard, Olivier
发表日期	2022
ISSN	2398-9629
页码	12
英文摘要	From 1985 onwards, South America has undergone a major expansion in agriculture at the expense of native vegetation (for example, native Pampa grassland). As an emblematic crop, the surface area cultivated with soybeans has increased by 1,000% between 1990 and 2020 in Uruguay. The environmental consequences of this massive land-use conversion on soil degradation remain poorly documented, although agriculture expansion is projected to continue to increase in the coming years in South America. In this study, sediment cores were collected in reservoirs located downstream of two contrasted agricultural catchments draining the Rio Negro River (Uruguay) to reconstruct the sediment dynamics and the sources of erosion associated with this expansion. Results demonstrated the occurrence of two periods of acceleration of sediment delivery since the 1980s. The first period of acceleration was recorded in the mid-1990s and was related to afforestation programs. The second and larger acceleration phase was recorded after 2000 during the soybean crop expansion. This period was marked by a greater supply of sediment from the native grassland source, highlighting the impact of agriculture expansion at the expense of native vegetation. Conservation measures should therefore be urgently taken to preserve biodiversity and soil functions in this region. The impacts on soil degradation of the massive land-use conversion of South American Pampa grasslands to agriculture are not well documented. This study estimates, over the period 1982-2019, the impacts of such conversion on the sediment cascade and how soil and water resources are affected as a result.
学科领域	Green & Sustainable Science & Technology; Environmental Sciences; Environmental Studies
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
WOS记录号	WOS:000934369100001
来源期刊	NATURE SUSTAINABILITY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272862
作者单位	Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute for Earth Sciences & Astronomy (INSU); UDICE-French Research Universities; Universite Paris Saclay; CEA; Universidad de la Republica, Uruguay; Universidad de la Republica, Uruguay; CEA; UDICE-French Research Universities; Universite Paris Saclay; BASF; Universidade Federal do Rio Grande do Sul
推荐引用方式 GB/T 7714	Foucher, Anthony,Tassano, Marcos,Chaboche, Pierre-Alexis,et al. Inexorable land degradation due to agriculture expansion in South American Pampa[J],2022:12.
APA	Foucher, Anthony.,Tassano, Marcos.,Chaboche, Pierre-Alexis.,Chalar, Guillermo.,Cabrera, Mirel.,...&Evrard, Olivier.(2022).Inexorable land degradation due to agriculture expansion in South American Pampa.NATURE SUSTAINABILITY,12.
MLA	Foucher, Anthony,et al."Inexorable land degradation due to agriculture expansion in South American Pampa".NATURE SUSTAINABILITY (2022):12.