Resilience to stress of woody species in Faidherbia albida (Del) A. Chev. and Prosopis africana (Guill., Perrot and Rich.) Taub. parklands in the Sahelian Niger
By: Moussa Massaoudou, Larwanou Mahamane, Karim Saley, Saadou Mahamane
Key Words: Agroforestry parklands, Importance Value Index, Regeneration, Resilience, Sahel- Niger.
J. Bio. Env. Sci. 8(3), 107-124, March 2016.
A quantitative analysis of resilience to disturbances of woody stands of Prosopis africana and Faidherbia albida parklands in south-central Niger was investigated. Surveys were conducted through individual questionnaires, focus groups and village assemblies and the inventory of vegetation in the two parklands. Twenty-two (22) species belonging to 21 genera and 16 families have disappeared in the F. albida parkland against 34 species belonging to 28 genera and 18 families in P. africana parkland. In F. albida parkland, 21 woody species of which 16 are adult and 5 are sprout while in P. africana parkland, 29 woody species of which 20 are adult and 9 regeneration are inventoried. The results also indicated four types of resilience of woody species. 1) Species with high IVI and regeneration (P. africana, Piliostigma reticulatum, F. albida and Combretum glutinosum); 2) species with low IVI and high regeneration (Guiera senegalensis, Ziziphus mauritiana, Bauhinia rufescens, Maerua crassifolia, Balanites aegyptiaca, Acacia senegal, Albizia chevalieri, Hyphaene thebaica); 3) species with very low IVI and without regeneration (Tamarindus indica, Acacia nilotica Adansonia digitata, Boscia salicifolia, Sterculia setigera and Dyospiros mespiliformis) and 4) species with regeneration but without adult trees (Securidaca longepedunculata, Entada africana, Cassia singueana, Terminalia avicennioides, Feretia apodanthera, Combretum micranthum, Commiphora africana, Ficus platyphylla and Calotropis procera). This information can provide guidance on species selection for rehabilitation of disappeared or threatened species and in developing sound agroforest management plans in this part of Niger.