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Methods Maasai Mara, Kenya, 2005.

Use of solitary trees by African herbivores and vultures Per Eriksson (perer729@student.liu.se), International Master Programme Applied Biology, 2006, Linköpings Universitet. Supervisor: Jens Jung, SLU. Background The solitary trees in Maasai Mara are diminishing. Focal species:

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Methods Maasai Mara, Kenya, 2005.

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  1. Use of solitary trees by African herbivores and vultures Per Eriksson (perer729@student.liu.se), International Master Programme Applied Biology, 2006, Linköpings Universitet. Supervisor: Jens Jung, SLU. • Background • The solitary trees in Maasai Mara are diminishing. • Focal species: • blue wildebeest (Connochaetes taurinus) • plains zebra (Equus burchelli) • Thomson´s gazelle (Gazella thomsonii) • griffon vultures (Gyps spp.) Aim: to investigate the influence of solitary trees on focal species. • Methods • Maasai Mara, Kenya, 2005. • Number of individuals per species and their behaviour were recorded. • Transect study: 16 areas of 0.3 km2 with zero to 40 trees driven 12 times each. • Photo study: Tree and treeless control areas (radius 20 m) on the 16 transects were investigated. Totally 167 trees and 167 controls were photographed four times each. Conclusion Solitary tree are not necessarily important for Thomson´s gazelles, but are important for the other focal species. The present study strengthen the importance of solitary trees for the eco-system. Transect and photo study Results Transect study Photo study Correlation (rs) between no. of trees and no. of ind. Species 6:30 - 18:30 12:30 - 16:30 blue wildebeest NS NS plains zebra 0.237** 0.265* Thomson´s gazelle 0.244** 0.344** griffon vulture 0.260** - *P < 0.05, **P < 0.01, ***P < 0.001, NS P > 0.05.

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