Results 51 to 60 of about 17,563 (212)

Heterogeneous impact of crop diversification on farm net returns and risk exposure: Empirical evidence from Ghana

Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, Volume 72, Issue 4, Page 469-487, December 2024.
Abstract Increasing frequency of extreme weather events threatens the livelihoods of low‐income farm households due to the heavy dependence on rain‐fed agriculture coupled with the under‐developed formal markets for risk management products. Thus, crop diversification is one of the widely used ex ante adaptation strategies to hedge against weather risk
Baba Adam, Awudu Abdulai
wiley   +1 more source

Etude photo-aérienne des pâturages des hauts plateaux de l'Adamawa occidental

Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 1973
L'auteur a étudié, dans le cadre d'une thèse, les problèmes posés par la relation agriculture-élevage. Dans son ouvrage "La transformation du milieu physique sous l'effet du surpâturage sur les hauts plateaux de l'Adamawa", l'évolution des savanes est ...
Jean Hurault
doaj   +1 more source

Spatial carbon, nitrogen and phosphorus budget of a village territory in the West African savanna : II. Element flows and functioning of a mixed-farming system [PDF]

, 2004
La disponibilité de la matière organique dans le système plante-sol, et les usages multiples des ressources organiques, sont d'importants déterminants de la viabilité des systèmes agropastoraux d'Afrique de l'Ouest.
Feller, Christian, Ickowicz, Alexandre, Manlay, Raphaël, Masse, Dominique, Richard, Didier   +4 more
core  

Anthropogenic linear features exhibit greater mammal activity relative to surrounding game trails in a woody savannah

African Journal of Ecology, Volume 62, Issue 3, September 2024.
Abstract Anthropogenic development throughout African savannahs results in changes to landscapes and wildlife habitat. Linear features (e.g. roads and powerlines) have become more prevalent and can reshape how many mammal species navigate the landscape.
Ryan S. Fitzpatrick, Miranda C. Kissel, Matthew A. Wuensch, Taylor C. Michael, David Ward   +4 more
wiley   +1 more source

Rocky outcrops form islands of high and unique tree biodiversity within an ocean of grass in Serengeti National Park

African Journal of Ecology, Volume 62, Issue 3, September 2024.
Abstract African savannahs are characterised by a high plant diversity, partly resulting from a high turnover in community compositions across space. However, it is poorly understood what is driving this spatial turnover in plant communities. Here, we investigate to which extent the presence of rocky outcrops (also called kopjes) explains the community
Fons van der Plas, Han Olff
wiley   +1 more source

Le rôle de l'élevage extensif dans la modification de la végétation à Madagascar

Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux, 1965
L'auteur se propose de démontrer le rôle dominant joué par l'élevage extensif dans le maintien de l'évolution de l'équilibre forêt-savane à Madagascar. Le rôle important, décisif, joué par le feu est analysé.
P. Granier
doaj   +1 more source

Spatial and temporal variation of malaria entomological parameters at the onset of a hydro-agricultural development in central Côte d'Ivoire [PDF]

, 2015
A deeper understanding of the ecology and small-scale heterogeneity of malaria transmission is essential for the design of effective prevention, control and elimination interventions.
Adja, Akré M., Coulibaly, Jean T., Diakité, Nana R., Guindo-Coulibaly, Négnorogo, N'Goran, Eliézer K., Ouattara, Mamadou, Utzinger, Jürg   +6 more
core   +2 more sources

Trait‐based mechanistic approach highlights global patterns and losses of herbivore biomass functional diversity

Functional Ecology, Volume 38, Issue 4, Page 808-819, April 2024.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Mammalian herbivores play a pivotal role in Earth System processes by affecting biogeochemical cycles and ecosystem functioning, potentially leading to significant repercussions on atmosphere–biosphere feedbacks.
Fabio Berzaghi, Dan Zhu, John Alroy, Philippe Ciais   +3 more
wiley   +1 more source

Impacts de l’évolution de la biomasse susceptible de brûler sur la dynamique des régimes des feux de brousse et des émissions de CO et de CO2 dans la région du Poro au nord de la Côte d’Ivoire [PDF]

Revue de Géographie Tropicale et d’Environnement
L’évolution récente de la biomasse susceptible de brûler dans la savane soudanaise, notamment au cours des deux dernières décennies et leurs impacts sur le changement des régimes des feux de brousse et des quantités des gaz émis sont mal connus dans la ...
Moussa KONE; Saly Ramata MAIGA; Koffi Michael TOSSOU
doaj   +1 more source

Finders' eaters: Increasing bush encroachment may shift carcass detection from diurnal avian to nocturnal mammalian scavengers

African Journal of Ecology, Volume 62, Issue 2, February 2024.
Abstract Bush encroachment is increasingly becoming a problem for biodiversity conservation in African savannas. While this invasion by woody vegetation may hamper avian scavengers such as vultures, which primarily search by sight, it may benefit mammalian scavengers that search by smell.
Gerard Malan, Kyle S. Walker, Ara Monadjem   +2 more
wiley   +1 more source