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Environmental change in time series : An interdisciplinary study in the Sahel of Mali and Senegal

Title data

Brandt, Martin ; Romankiewicz, Clemens ; Spiekermann, Raphael ; Samimi, Cyrus:
Environmental change in time series : An interdisciplinary study in the Sahel of Mali and Senegal.
In: Journal of Arid Environments. Vol. 105 (June 2014) . - pp. 52-63.
ISSN 0140-1963
DOI: https://doi.org/10.1016/j.jaridenv.2014.02.019

Official URL: Volltext

Project information

Project financing: Bundesministerium für Bildung und Forschung

Abstract in another language

Climatic changes and human activities have caused major environmental change in the Sahel. Remote sensing studies detect various vegetation trends; however, explanations are rarely studied in detail. We present a methodology using time series, high-resolution imagery and fieldwork to validate trend analyses for two regions in the Sahel of Mali and Senegal. Both study areas show significant greening trends from 1982 to 2010. Reasons can be very site-specific, but several factors are valid for both research areas: (1) farmer-managed agro-forestry, (2) planting programs and protection laws, (3) widespread dispersion of robust species, which replace the former diverse woody vegetation and simulate a greening which conceals a shift in biodiversity and (4) an increase of annual rainfall. However, the situation is still far from the pre-drought conditions, which are reconstructed by Corona imagery (1965) and interviews with the local population. Rather a transformation is observed: a decrease in natural vegetation, tree density and diversity. Reasons are climatic and anthropogenic: (1) drought events, less rain and higher temperatures, (2) increased demand for cropping areas and wood, especially in times of droughts. Our example validates that climatic factors are important drivers of change, but much of today's environment and vegetation composition is controlled by humans.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Africa; Sahel; Mali; Senegal; Remote sensing; Environmental change; Climate Change; Land use; CORONA; RapidEye
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professur Politische Geographie
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professur Politische Geographie > Professur Politische Geographie - Univ.-Prof. Dr. Martin Doevenspeck
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Climatology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Climatology > Professorship Climatology - Univ.-Prof. Dr. Cyrus Samimi
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Ecology and the Environmental Sciences
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: Yes
DDC Subjects: 300 Social sciences
500 Science
500 Science > 550 Earth sciences, geology
900 History and geography > 910 Geography, travel
Date Deposited: 02 Dec 2014 13:02
Last Modified: 05 Apr 2017 10:24
URI: https://eref.uni-bayreuth.de/id/eprint/4412