Review Article

Vulnerability of vulture populations to elephant impacts in KwaZulu-Natal

Ian A. Rushworth, Dave Druce, John Craigie, Brent Coverdale
Bothalia | Vol 48, No 2 | a2327 | DOI: https://doi.org/10.4102/abc.v48i2.2327 | © 2018 Ian A. Rushworth, Dave Druce, John Craigie, Brent Coverdale | This work is licensed under CC Attribution 4.0
Submitted: 03 November 2017 | Published: 19 July 2018

About the author(s)

Ian A. Rushworth, Scientific Services, Ezemvelo KwaZulu-Natal Wildlife, South Africa
Dave Druce, Scientific Services, Ezemvelo KwaZulu-Natal Wildlife, South Africa; School of Life Sciences, University of KwaZulu-Natal, South Africa
John Craigie, Scientific Services, Ezemvelo KwaZulu-Natal Wildlife, South Africa
Brent Coverdale, Scientific Services, Ezemvelo KwaZulu-Natal Wildlife, South Africa


See Updates


Share this article

Bookmark and Share

Abstract

Elephant were previously widespread in savanna and coastal systems of KwaZulu-Natal (KZN), but were virtually extirpated by 1870. Over time, elephant have been reintroduced into their former range in KZN, but always onto small fenced systems (mean size 191.3 km2 ± 87.8 km2, median size 107.0 km2, range 14 km2 – 900 km2). These populations have increased rapidly (8.4% per annum), and although a number of populations are now being managed using contraception, the majority of the populations (66.7%, 14 out of 21) are stocked above the ‘preferred density’ as defined in their approved management plans, while others will soon exceed the preferred density. Vulture populations in KZN are small, declining and already at risk of extinction. In KZN, 94.2% of tree-nesting vulture nests occur in areas with elephant; this could increase to 99.5% in the near future if proposed land-use change takes place. Anthropogenic impacts in the broader landscape mean that there are limited opportunities for vultures to nest elsewhere, and we hypothesise that loss of suitable nesting habitat in existing areas, including through impact of elephant on large trees, could result in declines and even extirpation of these species as breeding residents. Given the demonstrated and potential impacts of elephants on large trees necessary for vulture nesting, it is essential that the role of protected areas and extensive wildlife systems for vultures be adequately taken into account when managing elephant populations. It is important that a precautionary and adaptive management approach is taken regarding management of elephant in areas important for vultures, at least until the ecological interactions between vultures, vegetation, elephant and other drivers are better understood, and until the willingness and ability to manage elephant numbers and impact according to the elephant management plans are demonstrated.

Keywords

Vulture; elephant; impact

Metrics

Total abstract views: 231
Total article views: 176

 

Crossref Citations

1. Management of African elephant populations in small fenced areas: Current practices, constraints and recommendations
S.A. Jeanetta Selier, Rob Slotow, Dave Balfour
Bothalia  vol: 48  issue: 2  year: 2018  
doi: 10.4102/abc.v48i2.2414