Monitoring land-cover changes in semi-arid regions: Remote sensing data and field observations in the Ferlo, Senegal
dc.contributor.author | Diouf, A. | en |
dc.contributor.author | Lambin, E. F. | en |
dc.contributor.department | Sustainable Agriculture and Natural Resource Management (SANREM) Knowledgebase | en |
dc.coverage.spatial | Ferlo | en |
dc.coverage.spatial | Sahel | en |
dc.date.accessioned | 2016-04-19T18:55:45Z | en |
dc.date.available | 2016-04-19T18:55:45Z | en |
dc.date.issued | 2001 | en |
dc.description | Metadata only record | en |
dc.description.abstract | Dryland degradation rarely translates into linear, declining trends in vegetation cover due to interannual climatic variability. Appropriate indicators of land-cover modifications need to be defined for semi-arid regions. Our hypothesis is that degradation can be measured by: (1) a decrease in the resilience of vegetation to droughts; (2) a decrease in rain-use efficiency; and (3) a modification of floristic composition. The objective of this paper is to test the relationships between a remotely sensed indicator of vegetation, rainfall data and field measurements of biomass and floristic composition. The study was based on field measurements of vegetation conditions covering a period of 10 years, in the semi-arid region of the Ferlo in Senegal. Our results indicate that land-cover modifications in the Ferlo are best measured by changes in rain-use efficiency. No consistent trend in the relative abundance of grass species was visible at the scale of the decade, even on the two sites affected by degradation. Just after a drought, a given increase in rainfall results in less biomass production than is the case for normal years. ---Academic Press | en |
dc.format.mimetype | text/plain | en |
dc.identifier | 1124 | en |
dc.identifier.citation | Journal of Arid Environments 48(2): 129-148 | en |
dc.identifier.issn | 0140-1963 | en |
dc.identifier.uri | http://hdl.handle.net/10919/65960 | en |
dc.language.iso | en_US | en |
dc.publisher | Academic Press | en |
dc.rights | In Copyright | en |
dc.rights.holder | Copyright 2001 Academic Press | en |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
dc.subject | Desertification | en |
dc.subject | Drought | en |
dc.subject | Semiarid zones | en |
dc.subject | Soil degradation | en |
dc.subject | Soil | en |
dc.subject | Remote sensing | en |
dc.subject | Land cover changes | en |
dc.subject | Land degradation | en |
dc.subject | Sahel | en |
dc.subject | Land use | en |
dc.subject | Rain | en |
dc.subject | Botanical composition | en |
dc.subject | Monitoring | en |
dc.subject | Temporal variation | en |
dc.subject | Rain-use efficiency | en |
dc.subject | Ecosystem | en |
dc.title | Monitoring land-cover changes in semi-arid regions: Remote sensing data and field observations in the Ferlo, Senegal | en |
dc.type | Abstract | en |
dc.type.dcmitype | Text | en |