Does a change in land use affect woody vegetation in sub-humid sudanian savanna in Senegal?

Žáčková, M.; Hejcmanová, P.; Hejcman, Michal

doi:10.7160/sab.2013.440403

Cited by 3 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The climate has a seasonal character with a dry season from November to May and a rainy season from June to October, with annual mean precipitation of 1022 mm and the mean annual temperature 26 °C. The area belongs to the Sudanese/ Sudano-Guinean savannah and contains three vegetation types: wooded grassland, woodland and the transitional woodland with dominants of Acacia macrostachya , several species of the Combretum genus , Piliostigma thonningii, Prosopis africana , Pterocarpus erinaceus, Terminalia avicennoides , and T. macroptera 31 . The study was performed in the 70 ha enclosure within the FR maintained for purposes of WDE conservation breeding on a herd of six animals (one male and five females), the only herd for reproduction held in the reserve in 2008.…”

Section: Methodsmentioning

confidence: 99%

Drivers of diet selection of critically endangered Western Derby eland during the food shortage period within conservation breeding in Senegal

Hejcmanová

Miřejovská

Homolka

et al. 2019

Sci Rep

View full text Add to dashboard Cite

Browsers represent a challenge for breeding facilities because of their sensitivity to nutritional management. Western Derby eland ( Tautrotragus derbianus derbianus , WDE) is a large browsing antelope with a very diverse diet. Because of its critically endangered status, a small WDE population is kept for conservation purposes in the fenced Fathala reserve (Senegal) and during the critical, hot dry season, the animals are offered supplementary Acacia albida pods. We aimed to identify which woody plant species were preferentially selected/avoided by WDE during the period of food shortage, which plant nutritional properties were drivers of animals’ diet selection, and how this selectivity was affected by supplemental feed. The animals were selective for certain plant species, most for Piliostigma thonningi pods. Preferences decreased with a feed supplement, while avoidances remained intact. Diet selection was connected with chemical traits, mostly by negative correlations to N, Mg, Ca and hemicellulose, which disappeared or were weaker when supplemental feed was offered. Our findings indicate that large browsers during periods of food shortage must cope with inappropriate chemical composition in regard to nutrition and seek to alleviate them not only by diversification of plant species in the diet, but also by adjusting chemical diet quality as a whole.

show abstract

Section: Methodsmentioning

confidence: 99%

Drivers of diet selection of critically endangered Western Derby eland during the food shortage period within conservation breeding in Senegal

Hejcmanová

Miřejovská

Homolka

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…for Derby eland, but also for common eland, was found in the content of lignin and its proportion as indigestible component in the diet. The sub-humid savanna offers broad-leaved tree species, for instance Terminalia spp., Combretum spp., Saba senegalensis [36], these species thus provide more biomass, while they also contain more lignin, tannins, and/or other secondary metabolites which simultaneously increase nitrogen content irrelevant as nutritive element due to its nonprotein origin. On the other hand, the semi-arid savanna vegetation is composed dominantly by Acacia spp.…”

Section: Discussionmentioning

confidence: 99%

Resilience in Diet-quality Strategies of Mixed Native and Non-native Herbivore Communities in Semi-arid and Sub-humid Savanna Ecosystem

Lucie¹,

Hejcmanová²

2021

Preprint

View full text Add to dashboard Cite

The global climate change processes are expected to impact African savanna ecosystems in their ecological functionality and availability of food resources for herbivores. To understand the feeding responses of large savanna herbivores placed to space-constrained and two environmentally distinct (semi-arid versus sub-humid savanna) conditions, we investigated the diet quality of five species living in a mixed community of species native and non-native for the West African savanna and compared them between the two sites as a proxy for a potential ecosystem shift due to climate change. Grazers and mixed feeders maintained diet quality in most nutrients at similar levels, while browser’s diet had lower nitrogen and fibres, specifically lignin, and more calcium in semi-arid savanna. Our findings suggest that adaptation to different ecosystems with no possibility to leave the area required changes in feeding behaviour across feeding types to maintain diet quality, especially mixed feeders escaped the competition with zebras for grasses in sub-humid savanna by switching to browse. Pure browser experienced reduced diet quality in drier environment and may potentially become susceptible to ecosystem changes. Conservation strategies should facilitate both, animals’ adequate behavioural responses together with nutritional resilience in changing savanna landscapes.

show abstract

Responses of Tree Diversity, Community Composition, and Carbon Stocks to Forest Management in the Sudanian Domain of West Africa

Niang,

Philippe,

Bienvenu

et al. 2023

Preprint

View full text Add to dashboard Cite

Does a change in land use affect woody vegetation in sub-humid sudanian savanna in Senegal?

Cited by 3 publications

References 0 publications

Drivers of diet selection of critically endangered Western Derby eland during the food shortage period within conservation breeding in Senegal

Drivers of diet selection of critically endangered Western Derby eland during the food shortage period within conservation breeding in Senegal

Resilience in Diet-quality Strategies of Mixed Native and Non-native Herbivore Communities in Semi-arid and Sub-humid Savanna Ecosystem

Responses of Tree Diversity, Community Composition, and Carbon Stocks to Forest Management in the Sudanian Domain of West Africa

Contact Info

Product

Resources

About