Biodiversity and Conservation

, Volume 23, Issue 3, pp 573–596

Large herbivore responses to surface water and land use in an East African savanna: implications for conservation and human-wildlife conflicts

  • Joseph O. Ogutu
  • Robin S. Reid
  • Hans-Peter Piepho
  • Nicholas T. Hobbs
  • Michael E. Rainy
  • Russell L. Kruska
  • Jeffrey S. Worden
  • Meshack Nyabenge
Original Paper

Abstract

Water, forage and predation constrain ungulate distributions in savannas. To understand these constraints, we characterized distributions of 15 herbivore species from water, locations of peak density and degree of clustering around the peaks using zero-inflated count data models and mapping census data collected in the Mara reserve and the adjoining pastoral ranches in Kenya during a wet and dry year. Herbivores followed a humped pattern (n = 46), suggesting constrained foraging in which they balance the benefits of proximity to water with the costs of foraging where food is depleted near water and travelling to more abundant food distant from water; an exponentially decreasing pattern (n = 11), indicating strong attraction to water or vegetation near water; or a uniform (n = 3) pattern. The details rather than the types of these patterns varied between years. Herbivores concentrated farther from water and more tightly around locations of their peak densities in the ranches than the reserve. Herbivores were more abundant and widely distributed from water in the wet than the dry year, and segregated along the distance-to-water gradient, presumably to minimize interspecific competition for food. Pastoralism compressed herbivore distributions and partially excluded some species (warthog, hartebeest, topi, wildebeest, zebra, eland, buffalo and elephant) from, while attracting others (Grant’s and Thomson’s gazelles, impala, giraffe) to the ranches, relative to the reserve. Regulating cultivation, fencing, settlements and livestock stocking levels in the ranches would allow continued wildlife access to water, reduce competition with, displacement or harassment of wildlife by people, livestock and dogs near water.

Keywords

Ungulates Water Piosphere Rainfall variability Mara-Serengeti ecosystem Pastoralism Zero-inflated models 

Supplementary material

10531_2013_617_MOESM1_ESM.pdf (219 kb)
Supplementary material 1 (PDF 219 kb)
10531_2013_617_MOESM2_ESM.pdf (194 kb)
Supplementary material 2 (PDF 195 kb)
10531_2013_617_MOESM3_ESM.pdf (283 kb)
Supplementary material 3 (PDF 283 kb)
10531_2013_617_MOESM4_ESM.pdf (359 kb)
Supplementary material 4 (PDF 359 kb)
10531_2013_617_MOESM5_ESM.pdf (342 kb)
Supplementary material 5 (PDF 343 kb)

Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Joseph O. Ogutu
    • 1
    • 2
  • Robin S. Reid
    • 1
    • 3
  • Hans-Peter Piepho
    • 2
  • Nicholas T. Hobbs
    • 3
  • Michael E. Rainy
    • 4
  • Russell L. Kruska
    • 1
  • Jeffrey S. Worden
    • 1
    • 3
  • Meshack Nyabenge
    • 1
  1. 1.International Livestock Research InstituteNairobiKenya
  2. 2.Institute of Crop ScienceUniversity of HohenheimStuttgartGermany
  3. 3.Natural Resource Ecology LaboratoryColorado State UniversityFort CollinsUSA
  4. 4.Explore Mara LtdNairobiKenya

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