Overlap and seasonal shifts in use of woody plant species amongst a guild of savanna browsers

1.81 MB 17 downloads

Abstract: To clarify the potential influence of different browsers in the same guild on woody vegetation, dietary overlap and separation between elephant, giraffe, kudu, nyala and impala was assessed in Hluhluwe-iMfolozi...

Author(s): Christopher A. J. O'Kane, Kevin J. Duffy, Bruce R. Page and David W. Macdonald
Year: 2011
Journal: Journal of Tropical Ecology
Page Numbers: 249-258

Thorns as induced defenses: experimental evidence

777.67 KB 13 downloads

Abstract: We report evidence from controlled experiments that long straight thorns deter herbivory by browsers. Cut branches of three woody species that had their thorns removed suffered significantly greater herbivory...

Author(s): A.V. Milewski, Truman P. Young and Derek Madden
Year: 1991
Journal: Oecologia
Page Numbers: 70-75

Seasonal utilization of leaves by giraffes Giraffa camelopardalis, and the relationship of the seasonal utilization to the chemical composition of the leaves

1.14 MB 30 downloads

Abstract: Food preferences of giraffe have been extensively investigated but few data concerning the chemical composition of the preferred species are available. The present study was aimed at ascertaining whether...

Author(s): J. J. C. Sauer, J. D. Skinner and A. W. H. Neitz
Year: 1982
Journal: South African Journal of Zoology
Page Numbers: 210-219

A comparison between Acacia and Combretum leaves utilized by giraffe

309.45 KB 32 downloads

Abstract: Various studies on the food preferences of giraffe indicate that the leaves of the Acacia and Combretum species are the most important food items selected. The present study was aimed at comparing the...

Author(s): J. J. C. Sauer
Year: 1983
Journal: South African Journal of Animal Science
Page Numbers: 43 - 44

Giraffes and the pollination ecology of knobthorns (Acacia nigrescens)

1.07 MB 21 downloads

Abstract: Giraffes (Giraffa camelopardalis) consume large quantities of knobthorn (Acacia nigrescens) flowers every year, and may be acting as pollinators. Because knobthorns flower in the late dry season, nutritionally...

Author(s): Sally D. Hofmeyr
Year: 2003
Journal: Master’s Thesis, University of Pretoria
Page Numbers: 1 - 56

Effects of simulated shoot and leaf herbivory on vegetative growth and plant defense in Acacia drepanolobium

116.06 KB 18 downloads

Abstract: Plants have considerable ability to respond to herbivory, both with (above-ground) regrowth and with increased defense. We simulated both leaf and shoot herbivory in controlled, replicated experiments...

Author(s): Michelle E. Gadd, Truman P. Young and Todd M. Palmer
Year: 2001
Journal: OIKOS
Page Numbers: 515–521

Effects of natural and simulated herbivory on spine lengths of Acacia drepanolobium in Kenya

170.78 KB 102 downloads

Abstract: We present experimental evidence supporting the hypothesis that increased spine length in acacia species is a defense induced by herbivory. Acacia drepanolobium is the dominant tree over large areas of...

Author(s): Truman P. Young, Maureen L. Stanton and Caroline E. Christian
Year: 2003
Journal: OIKOS
Page Numbers: 171–179,

Shoot characteristics of Acacia tortilis (Forsk.) in wildlife and rangeland habitats of Botswana

128.88 KB 24 downloads

Abstract: Length, branch production, orientation, spinescence and biomass were measured for current shoots of Acacia tortilis shrubs in a range of habitats in Botswana. All shoot characteristics varied between individuals...

Author(s): J. M. Dangerfield, J. S. Perkins and S. K. Kaunda
Year: 1996
Journal: African Journal of Ecology
Page Numbers: 167–176