EVALUATION OF SNAG DENSITY AND UTILIZATION BY WILDLIFE IN MAYOSELBE RANGE OF GASHAKA GUMTI NATIONAL PARK, NIGERIA

Abstract

Snags (standing dead trees) have numerous ecological functions and contribute to structural
complexity and biodiversity in terrestrial habitats. A wide variety of wildlife depends on snags
for survival and reproduction. A study conducted to evaluate snag density and utilization by
wildlife species at Mayo-Selbe Range of Gashaka Gumti National Park. A total of 30 sample
plots measuring 50 by 50 feet were obtained randomly using stratified random sampling
technique. The density of snags was determined by counting from each of the plots, while
organisms visible on or within the snags were recorded. Data was analysed using descriptive
statistics. A total of 161 snags were recorded from the 30 sample plots, that is an average of 5
snags per 50 by 50 feet plot, while 26 species/categories of living organisms were found
inhabiting the snags. Species of insects (ants and termites), green alga such as spirogyra and
mushrooms were the most occurring organisms found inhabiting the snags, while small
mammals such as bats, reptiles such as snakes and arthropods (centipedes and millipedes) were
rarely found. The organisms identified on the snags have successfully carved niches for their
sustenance. They depended on the snags for shelter (habitat), reproductive activities,
roosting/resting, feeding and hiding/refuge. Though, the snag density was adequate, minimal use
of the snags by birds such as woodpeckers was observed. This may be attributed to hunting
pressure or other environmental factors. It is recommended that the management of the Park
should intensify effort to ensure that the snags are allowed to thrive and not exploited for
fuelwood (firewood) or other purposes. In addition, efforts need to be made in ensuring the
protection of biological resources of the Gashaka Gumti National Park.