Predicting time-specific changes in demographic processes using remote-sensing data

Journal of Applied Ecology

Volumn 43, Issue 2, 2006, Pages 366-376

  Rasmussen, Henrik B ^a,b   Wittemyer, George ^b,c   Douglas Hamilton, Iain ^b  

^a UNIVERSITY OF OXFORD   (United Kingdom)

^b SAVE THE ELEPHANTS   (Kenya)

^c UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

Demographic modelling; Elephants; NDVI; Rainfall; Reproductive rates; Ungulates

Indexed keywords

AKAIKE INFORMATION CRITERION; NDVI; POPULATION DYNAMICS; RAINFALL; REMOTE SENSING; SEASONAL VARIATION; UNGULATE; WILDLIFE MANAGEMENT;

AFRICA; EAST AFRICA; KENYA; SUB-SAHARAN AFRICA;

ELEPHANTIDAE; UNGULATA;

EID: 33744957407     PISSN: 00218901     EISSN: 13652664     Source Type: Journal    
DOI: 10.1111/j.1365-2664.2006.01139.x     Document Type: Article

References (42)

1. Anderson D.R. Burnham K.P. Thompson W.L. 2000 Null hypothesis testing: problems, prevalence, and an alternative. Journal of Wildlife Management, 64, 912 923.
2. Barkham J.P. Rainy M.E. 1976 Vegetation of Samburu-Isiolo Game Reserve. East African Wildlife Journal, 14, 297 329.
3. Beissinger S.R. Westphal M.I. 1998 On the use of demographic models of population viability in endangered species management. Journal of Wildlife Management, 62, 821 841.
4. Brashares J.S. Arcese P. 2002 Role of forage, habitat and predation in the behavioural plasticity of a small African antelope. Journal of Animal Ecology, 71, 626 638.
5. Burnham K.P. Andersen D.R. 1998 Model Selection and Inference: A Practical Theoretic Approach. Springer, New York, NY.
6. Calvert A.M. Gauthier G. 2005 Effects of exceptional conservation measures on survival and seasonal hunting mortality in greater snow geese. Journal of Applied Ecology, 42, 442 452.
7. Douglas-Hamilton I. 1972 On the Ecology and Behaviour of the African Elephant: Elephants of Lake Manyara. DPhil Thesis. Oxford University, Oxford, UK.
8. Emlen S.T. Oring L.W. 1977 Ecology, sexual selection, and evolution of mating systems. Science, 197, 215 223.
9. Freckleton R.P. Watkinson A.R. 1998 How does temporal variability affect predictions of weed population numbers? Journal of Applied Ecology, 35, 340 344.
10. Gaillard J.M. Festa-Bianchet M. Yoccoz N.G. Loison A. Toigo C. 2000 Temporal variation in fitness components and population dynamics of large herbivores. Annual Review of Ecology and Systematics, 31, 367 393.
11. Garrott R.A. Eberhardt L.L. White P.J. Rotella J. 2003 Climate-induced variation in vital rates of an unharvested large-herbivore population. Canadian Journal of Zoology, 81, 33 45.
12. Gasaway W.C. Gasaway T.K. Berry H.H. 1996 Persistent low densities of plains ungulates in Etosha National Park, Namibia: testing the food-regulating hypothesis. Canadian Journal of Zoology, 74, 1556 1572.
13. Georgiadis N. Hack M. Turpin K. 2003 The influence of rainfall on zebra population dynamics: implications for management. Journal of Applied Ecology, 40, 125 136.
14. Gordon I.J. Hester A.J. Festa-Bianchet M. 2004 The management of wild large herbivores to meet economic, conservation and environmental objectives. Journal of Applied Ecology, 41, 1021 1031.
15. Goward S.N. Prince S.D. 1995 Transient effects of climate on vegetation dynamics: satellite observations. Journal of Biogeography, 22, 549 564.
16. Huntely B. 1982 Southern African savannas. Ecology of Tropical Savannas (eds B. Huntley B. Walker, pp. 101 119. Springer Verlag, Berlin, Germany.
17. McCarthy M.A. 1996 Red kangaroo (Macropus rufus) dynamics: effects of rainfall, density dependence, harvesting and environmental stochasticity. Journal of Applied Ecology, 33, 45 53.
18. Madsen T. Shine R. 1999 The adjustment of reproductive threshold to prey abundance in a capital breeder. Journal of Animal Ecology, 68, 571 580.
19. Milner-Gulland E.J. Lhagvasuren B. 1998 Population dynamics of the Mongolian gazelle (Procapra gutturosa): an historical analysis. Journal of Applied Ecology, 35, 240 251.
20. Moss C.J. 1983 Estrous behavior and female choice in the African elephant. Behaviour, 86, 167 196.
21. Moss C.J. 1988 Elephant Memories: Thirteen Years in the Life of an Elephant Family. William Morrow, New York, NY.
22. Moss C.J. 1996 Getting to know a population. Studying Elephants (ed. K. Kangwana, pp. 58 74. African Wildlife Foundation, Nairobi, Kenya.
23. Moss C.J. 2001 The demography of an African elephant (Loxodonta africana) population in Amboseli, Kenya. Journal of Zoology, 255, 145 156.
24. Oftedal O.T. 1984 Pregnancy and lactation. Bioenergetics of Wild Herbivores (eds R.J. Hudson R.G. White, pp. 215 238. CRC Press Inc., Boca Raton, FL.
25. Ogutu J.O. Owen-Smith N. 2003 ENSO, rainfall and temperature influences on extreme population declines among African savanna ungulates. Ecology Letters, 6, 412 419.
26. Owen-Smith N. Mason D.R. Ogutu J.O. 2005 Correlates of survival rates for 10 African ungulate populations: density, rainfall and predation. Journal of Animal Ecology, 74, 774 788.
27. Pascual M.A. Hilborn R. 1995 Conservation of harvested populations in fluctuating environments: the case of the Serengeti wildebeest. Journal of Applied Ecology, 32, 468 480.
28. du Plessis W.P. 2001 Effective rainfall defined using measurements of grass growth in the Etosha National Park, Namibia. Journal of Arid Environments, 48, 397 417.
29. Portier C. Festa-Bianchet M. Gaillard J.M. Jorgenson J.T. Yoccoz N.G. 1998 Effects of density and weather on survival of bighorn sheep lambs (Ovis canadensis). Journal of Zoology, 245, 271 278.
30. Scanlon T.M. Albertson J.D. Caylor K.K. Williams C.A. 2002 Determining land surface fractional cover from NDVI and rainfall time series for a savanna ecosystem. Remote Sensing of Environment, 82, 376 388.
31. Sinclair A.R.E. Dublin H. Borner M. 1985 Population regulation of Serengeti wildebeest: a test of the food hypothesis. Oecologia, 65, 266 268.
32. Sinclair A.R.E. Mduma S.A.R. Arcese P. 2000 What determines phenology and synchrony of ungulate breeding in Serengeti? Ecology, 81, 2100 2111.
33. Stearns S.C. 1992 The Evolution of Life Histories. Oxford University Press, Oxford, UK.
34. Todd M.C. Washington R. Cheke R.A. Kniveton D. 2002 Brown locust outbreaks and climate variability in southern Africa. Journal of Applied Ecology, 39, 31 42.
35. Trivers R.L. 1972 Parental investment and sexual selection. Sexual Selection and the Descent of Man (ed. B. Campbell, pp. 136 179. Aldine, Chicago, IL.
36. Tuljapurkar S. 1990 Population Dynamics in Variable Environments. Springer-Verlag, New York, NY.
37. Wessels K.J. Prince S.D. Frost P.E. van Zyl D. 2004 Assessing the effects of human-induced land degradation in the former homelands of northern South Africa with a 1 km AVHRR NDVI time series. Remote Sensing of Environment, 91, 47 67.
38. Wittemyer G. 2001 The elephant population of Samburu and Buffalo Springs national reserves, Kenya. African Journal of Ecology, 39, 357 365.
39. Wittemyer G. Daballen D.K. Rasmussen H.B. Kahindi O. Douglas-Hamilton I. 2005 Demographic status of elephants in the Samburu and Buffalo Springs national reserves, Kenya. African Journal of Ecology, 43, 44 47.
40. Wittemyer G. Douglas-Hamilton I. Getz W.M. 2005 The socio-ecology of elephants: analysis of the processes creating multi-tiered social structures. Animal Behaviour, 69, 1357 1371.
41. Xie J.L. Hill H.R. Winterstein S.R. Campa H. Doepker R.V. Van Deelen T.R. Liu J.G. 1999 White-tailed deer management options model (DeerMOM): design, quantification, and application. Ecological Modelling, 124, 121 130.
42. Zar J.H. 1999 Biostatistical Analysis. 4th edn. Simon & Schuster, Upper Saddle River, NJ.