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Excessive pruning and limited regeneration: are Faidherbia albida parklands heading for extinction in the Central Rift Valley of Ethiopia?

Author: Sida, T.S.
Author: Baudron, F.
Author: Dejene Adugna Deme
Author: Motuma Tolera
Author: Giller, K.E.
Year: 2018
URI: https://hdl.handle.net/10883/19529
Abstract: Scattered Faidherbia albida trees provide multiple ecological and production benefits across the Sahel. The intensive management and use of this important tree may impede its regeneration. Regeneration bottlenecks were explored and population dynamics modelled. On experimental plots in which seed of F. albida was sown, exposure to the first 2 months of dry season resulted in a quarter of seedling mortality. Exposure to season-long free grazing and browsing caused significantly greater seedling mortality. Results from monitoring 100 permanent plots scattered over the landscape showed that adult population density was 4.2 ± 0.3 (mean ± SE) trees ha?1 and dominated by old age classes. Sixty percent of the total population were older than 30 years. The mean density for juveniles was 1.4 ± 0.2 (mean ± SE) individuals ha?1. The annual rates of decline were 1.2%, 51.3%, and 63.2% for adults, seedlings, and saplings, respectively. Our model predicted that the F. albida population will start to decline within 1?2 decades to eventually fall below 1 tree ha?1 within 60 years under current management. The model highlighted that the limited seed source, caused by excessive pruning, was the main constraint for recruitment. Appropriate land management policy to ensure adequate seed production would avert current trends in decline of F. albida population.
Format: PDF
Language: English
Publisher: John Wiley and Sons
Copyright: CIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose.
Type: Article
Place of Publication: United Kingdom
Pages: 1623-1633
Issue: 6
Volume: 29
DOI: 10.1002/ldr.2959
Agrovoc: AGROBIODIVERSITY
Agrovoc: CLIMATE CHANGE
Agrovoc: FAIDHERBIA ALBIDA
Related Datasets: https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fldr.2959&file=ldr2959-sup-0001-Sida+et.+al.+F.+albida+Degradation+LDD+Suppleme.docx
Journal: Land Degradation and Development


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  • Genetic Resources
    Genetic Resources including germplasm collections, wild relatives, genotyping, genomics, and IP

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