From land productivity trends to land degradation assessment in Mozambique: Effects of climate, human activities and stakeholder definitions

Autor: Valéry Gond, A.H. Cambule, Lilian Blanc, Ivan A. D. Remane, Louise Leroux, Clovis Grinand, Agnès Bégué, Frédérique Montfort
Přispěvatelé: Nitidæ, Territoires, Environnement, Télédétection et Information Spatiale (UMR TETIS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Environnements et Sociétés (Cirad-ES), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Agroécologie et Intensification Durables des cultures annuelles (UPR AIDA), Département Performances des systèmes de production et de transformation tropicaux (Cirad-PERSYST), Forêts et Sociétés (UPR Forêts et Sociétés), Université Eduardo Mondlane
Rok vydání: 2020
Předmět:
Évaluation des terres
factor analysis
Soil Science
010501 environmental sciences
Development
01 natural sciences
Normalized Difference Vegetation Index
Ecosystem services
United Nations Convention to Combat Desertification
Deforestation
Environmental Chemistry
NDVI time series
partie intéressée
Productivity
Dégradation des terres
productivité agricole
vocabulaire
Mozambique
0105 earth and related environmental sciences
General Environmental Science
P36 - Érosion
conservation et récupération des sols
2. Zero hunger
business.industry
Productivité des terres
land degradation
Environmental resource management
Impact sur l'environnement
1. No poverty
Stakeholder
04 agricultural and veterinary sciences
Vegetation
15. Life on land
RESTREND analysis
Geography
[SDE]Environmental Sciences
040103 agronomy & agriculture
Land degradation
0401 agriculture
forestry
and fisheries
business
land productivity change
Zdroj: Land Degradation and Development
Land Degradation and Development, Wiley, 2021, 32 (1), pp.49-65. ⟨10.1002/ldr.3704⟩
ISSN: 1099-145X
1085-3278
DOI: 10.1002/ldr.3704
Popis: International audience; Remote sensing observations such as normalized difference vegetation index (NDVI) trends can provide important insights into past and present land condition. However, they do not directly provide comprehensive information about our representation of land degradation and the processes at work. This study aimed to analyze vegetation productivity underlying factors in order to assess land degradation and to highlight the impact of definitions on its quantitative assessment, using Mozambique as case-study. Land productivity change were first analyzed using NDVI time-series (2000-2016), and a two-step framework was then used to understand the main factors of these productivity changes. The impact of land degradation's definition was assessed based on four types of stakeholder, with different priorities in terms of ecosystem services. The results show that 25% of the country display a significant land productivity decrease, while only 3% display a land productivity increase. A large part of these land productivity changes (>61% of the decrease, and >98% of the increase) is directly assigned to human activities, such as native forest growth or tree plantations (for the increase), or forest degradation, deforestation and loss of grassland productivity (for the decrease). We showed that the fraction of degraded land varies according to stakeholders' definitions, ranging from 12% to 20% of the Country, much less than the 39% estimated by Tier 1 United Nations Convention to Combat Desertification. This study provides a sound methodological framework for assessing land degradation status that could help stakeholders to design national and locally relevant land degradation mitigation policies or programmes.
Databáze: OpenAIRE
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