The destructive feeding ecology of elephants versus giraffes in South Africa
The giraffe (Giraffa camelopardalis), tallest of the land mammals and heaviest of all ruminants, is one of the world’s best-known animals because of its highly distinctive appearance. The African elephant (Loxodonta africana), is the largest land mammal on Earth and one of the most interesting species because of its unique feeding strategies. How destructive is […]
Collared!
North-western Namibia is a spectacular land of desert mountains, gorges, plains, and ephemeral rivers, and a land of stark beauty and seemingly inhospitable wilderness. It was here that the wildlife vet and capture expert Michael D. Kock came to help attach satellite collars to desert-dwelling elephants and giraffes so that their movements in their vast […]
Did the elephant and giraffe mediate change in the prevalence of palatable species in an East African Acacia woodland?
We report on a 2009 survey of Acacia woodlands in the Seronera area of central Serengeti, Tanzania, and compare the results to previous surveys from the 1970s–1980s. We document a substantial change in woodland structure and composition. From 1978 to 2009, woody plant density (mean ± SD) declined from 255 ± 35 trees ha−1 to 147 ± 14 […]
Resource partitioning within a browsing guild in a key habitat, the Chobe Riverfront, Botswana
Resource partitioning between elephant, giraffe, kudu and impala was assessed. This was to address concerns that elephant population increase adversely affects other species through depleting their food in key areas close to permanent water. Resources considered were woody species browsed, height browsed and plant parts browsed. Animals were observed as they browsed and the plant […]
Seed dispersal of Acacia erioloba by African bush elephants in Hwange National Park, Zimbabwe
Approximately two-thirds (64%) of all dry season samples of elephant dung analysed during a 3-year study in the Main Camp subregion of Hwange National Park, Zimbabwe, contained seed and/or pod materials from Acacia erioloba. Most seeds were recovered intact and actively germinating seeds were not uncommon. Very little pod mass relative to seed mass was […]
Effect of low rainfall and browsing by large herbivores on an enclosed savannah habitat in Kenya
Savannah ecosystems in East Africa are rarely stable and can experience rapid local changes from dense woodlands to open plains. In this 3-year study there was a reduction of 16.3% in a height-stratified sample of nearly 1000 individually marked Acacia drepanolobium trees. The study was carried out in an enclosed fire-free wooded grassland habitat in […]
Effects of resource limitation on habitat usage by the browser guild in Hluhluwe-iMfolozi Park, South Africa
Resource depletion and association increases in interspecific competition are likely to influence differential habitat usage amongst a guild. We tested some prominent theoretical concepts using observed differenced in seasonal habitat use amongst the savannah browser guild (elephant, giraffe, impala, kudu and nyala) in Hluhluwe-iMfolozi Park, South Africa. Herbivore locations (n= 3108) were recorded over 2 […]