Understanding Long-Term Variations in an Elephant Piosphere Effect to Manage Impacts

PLoS ONE

Volumn 7, Issue 9, 2012, Pages

  Landman, Marietjie ^a   Schoeman, David S ^a,b   Hall Martin, Anthony J ^c   Kerley, Graham I H ^a  

^a NELSON MANDELA METROPOLITAN UNIVERSITY   (South Africa)

^b UNIVERSITY OF THE SUNSHINE COAST   (Australia)

^c Hall Martin Consulting CC   (South Africa)

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE; BIODIVERSITY; CONFOUNDING VARIABLE; ELEPHANT; GRASS; HABITAT; NONHUMAN; POPULATION DENSITY; PREDICTION; QUANTITATIVE STUDY; SCRUB; SEA SURFACE WATERS; VEGETATION; WATER AVAILABILITY; WATER MANAGEMENT; WATER SUPPLY;

ANIMALS; BIODIVERSITY; DRINKING WATER; ECOSYSTEM; ELEPHANTS; POPULATION DENSITY; WATER SUPPLY;

EID: 84866464944     PISSN: None     EISSN: 19326203     Source Type: Journal    
DOI: 10.1371/journal.pone.0045334     Document Type: Article

References (51)

1. Senft RL, Coughenour MB, Bailey DW, Rittenhouse LR, Sala OE, et al. (1987) Large herbivore foraging and ecological hierarchies. BioScience 37: 789-799.
2. Chamaillé-Jammes S, Valeix M, Fritz H, (2007) Managing heterogeneity in elephant distribution: interactions between elephant population density and surface-water availability. Journal of Applied Ecology 44: 625-633.
3. Smit IPJ, Grant CC, Devereaux BJ, (2007) Do artificial waterholes influence the way herbivores use the landscape? Herbivore distribution patterns around rivers and artificial surface water sources in a large African savanna park. Biological Conservation 136: 85-99.
4. Loarie SR, van Aarde RJ, Pimm SL, (2009) Fences and artificial water affect African savannah elephant movement patterns. Biological Conservation 142: 3086-3098.
5. Owen-Smith N, Kerley GIH, Page B, Slotow R, van Aarde RJ, (2006) A scientific perspective on the management of elephants in the Kruger National Park and elsewhere. South African Journal of Science 102: 389-394.
6. Van Aarde RJ, Jackson TP, Ferreira SM, (2006) Conservation science and elephant management in southern Africa. South African Journal of Science 102: 385-388.
7. Owen-Smith RN, (1996) Ecological guidelines for waterpoints in extensive protected areas. South African Journal of Wildlife Research 26: 107-112.
8. Pickup G, Bastin GN, Chewings VH, (1998) Identifying trends in land degradation in non-equilibrium rangelands. Journal of Applied Ecology 35: 365-377.
9. Gaylard A, Owen-Smith N, Redfern J (2003) Surface water availability: implications for heterogeneity and ecosystem processes. In The Kruger Experience - Ecology and management of savanna heterogeneity du Toit JT, Rogers KH, Biggs HC, eds. Washington: Island Press. 171-188.
10. Walker BH, Emslie RH, Owen-Smith RN, Scholes RJ, (1987) To cull or not to cull: lessons from a southern African drought. Journal of Applied Ecology 24: 381-401.
11. Grant CC, Davidson T, Funston PJ, Pienaar DJ, (2002) Challenges faced in the conservation of rare antelope: a case study on the northern basalt plains of the Kruger National Park. Koedoe 45: 45-62.
12. Pienaar D, Biggs H, Deacon A, Gertenbach W, Joubert S, et al. (1997) A revised water-distribution policy for biodiversity maintenance in the Kruger National Park. Kruger Park Management Plan Vol 8. Skukuza: South African National Parks.
13. James CD, Landsberg J, Morton SR, (1999) Provision of watering points in the Australian arid zone: a review of effects on biota. Journal of Arid Environments 41: 87-121.
14. Graetz RD, Ludwig JA, (1978) A method for the analysis of piosphere data applicable to range assessment. Australian Rangeland Journal 1: 126-136.
15. Thrash I, Derry JF, (1999) The nature and modeling of piospheres: a review. Koedoe 42: 73-94.
16. Parker AH, Witkowski ETF, (1999) Long-term impacts of abundant perennial water provision for game on herbaceous vegetation in a semi-arid African savanna woodland. Journal of Arid Environments 41: 309-321.
17. Thrash I, (2000) Determinants of the extent of indigenous large herbivore impact on herbaceous vegetation at watering points in the north-eastern lowveld, South Africa. Journal of Arid Environments 44: 61-72.
18. Adler PB, Hall SA, (2005) The development of forage production and utilization gradients around livestock watering points. Landscape Ecology 20: 319-333.
19. Chamaille-Jammes S, Fritz H, Madzikanda H, (2009) Piosphere contribution to landscape heterogeneity: a case study of remote-sensed woody cover in a high elephant density landscape. Ecography 32: 871-880.
20. Kerley GIH, Landman M, Kruger L, Owen-Smith N, Balfour D, et al. (2008) Effects of elephant on ecosystems and biodiversity. In Elephant management: a scientific assessment for South Africa Scholes RJ, Mennell KG, eds. Johannesburg: Wits University Press. 146-204.
21. Mosugelo DK, Moe SR, Ringrose S, Nellemann C, (2002) Vegetation changes during a 36-year period in northern Chobe National Park, Botswana. African Journal of Ecology 40: 232-240.
22. Thrash I, (1998) Impact of large herbivores at artificial watering points compared to that at natural watering points in Kruger National Park, South Africa. Journal of Arid Environments 38: 315-324.
23. Landman M, Kerley GIH, Schoeman DS, (2008) Relevance of elephant herbivory as a threat to Important Plants in the Addo Elephant National Park, South Africa. Journal of Zoology, London 274: 51-58.
24. Thrash I, Nel PJ, Theron GK, Bothma JduP, (1991) The impact of the provision of water for game on the woody vegetation around a dam in the Kruger National Park. Koedoe 34: 131-148.
25. Brits J, van Rooyen MW, van Rooyen N, (2002) Ecological impact of large herbivores on the woody vegetation at selected watering points on the eastern basaltic soils in the Kruger National Park. African Journal of Ecology 40: 53-60.
26. Smith J (2012) A spatial and temporal analysis of elephant induced thicket degradation in Addo Elephant National Park. MSc Thesis, University of Port Elizabeth, South Africa.
27. Ludwig JA, Tongway D, Freudenberger D, Noble J, Hodgkinson K (1997) Landscape ecology: function and analysis. Collingwood: CSIRO Publishing.
28. Kerley GIH, Tongway D, Ludwig JA, (1999) Effects of elephant browsing on soil resources in Succulent Thicket, Eastern Cape, South Africa. VIth International Rangeland Congress 1: 116-117.
29. Lechmere-Oertel RG, Cowling RM, Kerley GIH, (2005) Landscape dysfunction and reduced spatial heterogeneity in soil resources and fertility in semi-arid succulent thicket, South Africa. Austral Ecology 30: 615-624.
30. Hayward MW, Kerley GIH, (2009) Fencing for conservation: restriction of evolutionary potential or a riposte to threatening processes? Biological Conservation 142: 1-13.
31. Kerley GIH, Landman M, (2006) The impacts of elephants on biodiversity in the Eastern Cape Subtropical Thickets. South African Journal of Science 102: 395-402.
32. Stuart-Hill GC, (1992) Effects of elephants and goats on the Kaffrarian Succulent Thicket of the Eastern Cape, South Africa. Journal of Applied Ecology 29: 699-710.
33. Mucina L, Rutherford MC, (2006) The vegetation of South Africa, Lesotho and Swaziland. Strelitzia 19: 1-807.
34. Kerley GIH, Knight MH, de Kock M, (1995) Desertification of Subtropical Thicket in the Eastern Cape, South Africa: are there alternatives? Environmental Monitoring and Assessment 37: 211-230.
35. Stuart-Hill GC, Aucamp AJ, (1993) Carrying capacity of the succulent valley bushveld of the Eastern Cape. African Journal of Range and Forage Science 10: 1-10.
36. Putman RJ, (1984) Facts from faeces. Mammalian Review 14: 79-97.
37. Barnes RFW, (2001) How reliable are dung counts for estimating elephant numbers? African Journal of Ecology 39: 1-9.
38. Young TP, Palmer TM, Gadd ME, (2005) Competition and compensation among cattle, zebras, and elephants in a semi-arid savanna in Laikipia, Kenya. Biological Conservation 122: 351-359.
39. Barratt DG, Hall-Martin AJ (1991) The effects of indigenous herbivores on Valley Bushveld in the Addo Elephant National Park. In Proceedings of the First Valley Bushveld/Subtropical Thicket Symposium Zacharias PJK, Stuart-Hill GC, eds. Howick: Grassland Society of Southern Africa. 14-16.
40. Clarke KR, (1993) Non-parametric multivariate analyses of changes in community structure. Australian Journal of Ecology 18: 117-143.
41. Clarke KR, Gorley RN (2006) Primer V6: User Manual/Tutorial. Plymouth, United Kingdom: PRIMER-E Ltd.
42. SANBI (2012) Plants of southern Africa: an online checklist 3.0. www.posa.sanbi.org.
43. Crawley MJ (2007) The R Book. John Wiley & Sons, Ltd.
44. R Development Core Team (2010) R: A language and environment for statistical computing. Austria: R Foundation for Statistical Computing.
45. Pinheiro JC, Bates DM (2000) Mixed-effects models in S and S-Plus. New York: Springer-Verlag.
46. Burnham KP, Anderson DR (2002) Model selection and multimodel inference - a practical Information-Theoretic approach. New York: Springer.
47. O'Connor TG, Goodman PS, Clegg B, (2007) A functional hypothesis of the threat of local extirpation of woody plant species by elephant in Africa. Biological Conservation 136: 329-345.
48. Lechmere-Oertel RG, Cowling RM, Kerley GIH, (2005) Patterns and implications of transformation in semi-arid succulent thicket, South Africa. Journal of Arid Environments 62: 459-474.
49. Westoby M, Walker B, Noy-Meir I, (1989) Opportunistic management for rangelands not at equilibrium. Journal of Range Management 42: 266-274.
50. Pickett STA, Kolasa J, Jones CG (1994) Ecological understanding: the nature of theory and the theory of nature. California: Academic Press.
51. Hayward MW, Zawadzka B, (2010) Increasing elephant Loxodonta africana density is a more important driver of change in vegetation condition than rainfall. Acta Theriologica 55: 289-299.