干旱区生态环境知识资源中心(Arid): When archives are missing, deciphering the effects of public policies and climate variability on the Brazilian semi-arid region using sediment core studies

Arid

DOI	10.1016/j.scitotenv.2020.137989
	When archives are missing, deciphering the effects of public policies and climate variability on the Brazilian semi-arid region using sediment core studies
	Ledru, Marie-Pierre 1; Jeske-Pieruschka, Vivian 2; Bremond, Laurent 1; Develle, Anne-Lise 3; Sabatier, Pierre 3; Passos Rodrigues Martins, Eduardo Savio 4; de Freitas Filho, Manuel Rodrigues 4; Fontenele, Diogenes Passos 4; Arnaud, Fabien 3; Favier, Charly 1; Gomes Barroso, Francisco Rony 2; Araujo, Francisca Soares 2
通讯作者	Ledru, Marie-Pierre
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2020
卷号	723
英文摘要	The northeastern region of Brazil is the most densely populated and biodiverse semi-arid regions of the planet. Effects of the natural climate variability and colonization on the landscape have been described since the beginning of the 16th century but little is known about their effects on natural resources. Climate projections predict temperatures above 40 degrees C and an increase in the number and duration of droughts at the end of the 21st century with strong societal impacts. Here, we analyze the influence of public policies, human activities and natural climate variability on the environment over the last 60 years. Our study is based on sedimentological and environmental reconstructions from two sediment cores collected in two dam lakes on the river Acarau in the State of Ceara. Multiproxy analyses of both cores (inorganic geochemistry, pollen, charcoal, remote sensing) at an annual resolution showed that 1) at interannual scale composition and distribution of the dry forest (known as Caatinga) were not affected by the alternance of drought and high moisture episodes; 2) at decadal scale human activities such as agriculture were reflected by changes in vegetation cover and fishery by progressive changes in lake trophic status; 3) public policies were able to promote changes in the landscape e.g., land colonization with the regression of the dry forest and irrigation plan able to amplify the deforestation and change the floristic composition. Thanks to paleo-science approach, our environmental diagnosis should help future decision-making and provide guidelines for preservation of resources and wellbeing of the inhabitants. (C) 2020 Elsevier B.V. All rights reserved.
英文关键词	Caatinga Lake reservoir Sediment Drought Land degradation Human impact
类型	Article
语种	英语
国家	France ; Brazil
收录类别	SCI-E
WOS记录号	WOS:000535466300018
WOS关键词	NORTHEAST BRAZIL ; DYNAMICS ; DISTURBANCE ; CAATINGA ; CHARCOAL ; FRANCE ; RECORD ; MO ; MN
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319349
作者单位	1.ISEM Univ Montpellier, CNRS, EPHE, IRD, Pl Eugene Bataillon, F-34095 Montpellier, France; 2.Fed Univ Ceara UFC, Dept Biol, BR-60440900 Fortaleza, Ceara, Brazil; 3.Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, EDYTEM, F-73000 Chambery, France; 4.FUNCEME, Av Rui Barbosa 1244, BR-60115221 Fortaleza, Ceara, Brazil
推荐引用方式 GB/T 7714	Ledru, Marie-Pierre,Jeske-Pieruschka, Vivian,Bremond, Laurent,et al. When archives are missing, deciphering the effects of public policies and climate variability on the Brazilian semi-arid region using sediment core studies[J]. French National Research Institute for Sustainable Development,2020,723.
APA	Ledru, Marie-Pierre.,Jeske-Pieruschka, Vivian.,Bremond, Laurent.,Develle, Anne-Lise.,Sabatier, Pierre.,...&Araujo, Francisca Soares.(2020).When archives are missing, deciphering the effects of public policies and climate variability on the Brazilian semi-arid region using sediment core studies.SCIENCE OF THE TOTAL ENVIRONMENT,723.
MLA	Ledru, Marie-Pierre,et al."When archives are missing, deciphering the effects of public policies and climate variability on the Brazilian semi-arid region using sediment core studies".SCIENCE OF THE TOTAL ENVIRONMENT 723(2020).