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Biodiversity and Conservation

, Volume 21, Issue 12, pp 3079–3094 | Cite as

Critical evaluation of a long-term, locally-based wildlife monitoring program in West Africa

  • A. Cole BurtonEmail author
Original Paper

Abstract

Effective monitoring programs are required to understand and mitigate biodiversity declines, particularly in tropical ecosystems where conservation conflicts are severe yet ecological data are scarce. “Locally-based” monitoring has been advanced as an approach to improve biodiversity monitoring in developing countries, but the accuracy of data from many such programs has not been adequately assessed. I evaluated a long-term, patrol-based wildlife monitoring system in Mole National Park, Ghana, through comparison with camera trapping and an assessment of sampling error. I found that patrol observations underrepresented the park’s mammal community, recording only two-thirds as many species as camera traps over a common sampling period (2006–2008). Agreement between methods was reasonable for larger, diurnal and social species (e.g., larger ungulates and primates), but camera traps were more effective at detecting smaller, solitary and nocturnal species (particularly carnivores). Data from patrols and cameras corresponded for some spatial patterns of management interest (e.g., community turnover, edge effect on abundance) but differed for others (e.g., richness, edge effect on diversity). Long-term patrol observations were influenced by uneven sampling effort and considerable variation in replicate counts. Despite potential benefits of locally-based monitoring, these results suggest that data from this and similar programs may be subject to biases that complicate interpretation of wildlife population and community dynamics. Careful attention to monitoring objectives, methodological design and robust analysis is required if locally-based approaches are to satisfy an aim of reliable biodiversity monitoring, and there is a need for greater international support in the creation and maintenance of local monitoring capacity.

Keywords

West Africa Camera trap Detection bias Locally-based monitoring Law enforcement patrols Mammal monitoring Protected area management Sampling error Survey methods Wildlife conservation 

Notes

Acknowledgments

I thank the Wildlife Division of the Forestry Commission of Ghana for permission and logistical support, particularly N. Adu-Nsiah, U. Farouk Dubiere, M. Sam, and C. Balangtaa. I am also indebted to the many dedicated staff from Mole National Park who contributed to the patrol monitoring program. I gratefully acknowledge the assistance of J. Brashares (and lab), E. Buedi, E. Bani, D. Bosu, D. Kpelle, J. Tahiru, R. Zieche, E. Ashie, R. Dave, P. Elsen, I. Abbeyquaye, S. Hateka, E. Rubidge, and T. Ayiku (A Rocha Ghana). C. Kremen, J. Brashares, S. Beissinger, W. Lidicker, and B. Jamieson made helpful comments on previous versions of the manuscript. Funding was received from the Panthera Kaplan Awards Program, U.S. National Science Foundation, Natural Sciences and Engineering Research Council of Canada, Monitoring Matters (Danida), and College of Natural Resources of the University of California, Berkeley.

Supplementary material

10531_2012_355_MOESM1_ESM.pdf (255 kb)
Supplementary material 1 (PDF 255 kb)

References

  1. Asibey EOA (1971) Ghana’s progress. Oryx 11:470–475CrossRefGoogle Scholar
  2. Asibey EOA (1974) Wildlife as a source of protein in Africa South of the Sahara. Biol Conserv 6(1):32CrossRefGoogle Scholar
  3. Balmford A, Bond W (2005) Trends in the state of nature and their implications for human well-being. Ecol Lett 8(11):1218–1234PubMedCrossRefGoogle Scholar
  4. Balmford A, Moore JL et al (2001) Conservation conflicts across Africa. Science 291(5513):2616–2619PubMedCrossRefGoogle Scholar
  5. Barea-Azcón J, Virgós E et al (2007) Surveying carnivores at large spatial scales: a comparison of four broad-applied methods. Biodivers Conserv 16(4):1213–1230CrossRefGoogle Scholar
  6. Barrett CB, Brandon K et al (2001) Conserving tropical biodiversity amid weak institutions. Bioscience 51(6):497–502CrossRefGoogle Scholar
  7. Bawa KS, Menon S (1997) Biodiversity monitoring: the missing ingredients. Trends Ecol Evol 12(1):42PubMedCrossRefGoogle Scholar
  8. Boutin S, Haughland DL et al (2009) A new approach to forest biodiversity monitoring in Canada. For Ecol Manage 258:S168–S175CrossRefGoogle Scholar
  9. Brashares JS (2003) Ecological, behavioral, and life-history correlates of mammal extinctions in West Africa. Conserv Biol 17(3):733–743CrossRefGoogle Scholar
  10. Brashares JS, Sam MK (2005) How much is enough? Estimating the minimum sampling required for effective monitoring of African reserves. Biodivers Conserv 14(11):2709–2722CrossRefGoogle Scholar
  11. Brashares JS, Arcese P et al (2001) Human demography and reserve size predict wildlife extinction in West Africa. Proc R Soc Lond Ser B 268(1484):2473–2478CrossRefGoogle Scholar
  12. Brashares JS, Arcese P et al (2004) Bushmeat hunting, wildlife declines, and fish supply in West Africa. Science 306(5699):1180–1183PubMedCrossRefGoogle Scholar
  13. Brashares JS, Prugh LR et al (2010) Ecological and conservation implications of mesopredator release. In: Terborgh J, Estes JA (eds) Trophic cascades: predators, prey, and the changing dynamics of nature. Island Press, Washington, pp 221–240Google Scholar
  14. Buckland ST, Anderson DR, et al (2001) Introduction to distance sampling: estimating abundance of biological populations. Oxford University Press, OxfordGoogle Scholar
  15. Burton AC, Sam MK, Kpelle DG, Balangtaa C, Buedi EB, Brashares JS (2011) Evaluating persistence and its predictors in a West African carnivore community. Biol Conserv 144(9):2344–2353CrossRefGoogle Scholar
  16. Butchart SHM, Walpole M et al (2010) Global biodiversity: indicators of recent declines. Science 328(5982):1164–1168PubMedCrossRefGoogle Scholar
  17. Can OE, Togan I (2009) Camera trapping of large mammals in Yenice Forest, Turkey: local information versus camera traps. Oryx 43:427–430CrossRefGoogle Scholar
  18. Chape S, Harrison J et al (2005) Measuring the extent and effectiveness of protected areas as an indicator for meeting global biodiversity targets. Philos Trans R Soc B 360(1454):443–455CrossRefGoogle Scholar
  19. Clark JS, Bjørnstad CN (2004) Population time series: process variability, observation errors, missing values, lags, and hidden states. Ecology 85(11):3140–3150CrossRefGoogle Scholar
  20. Collen B, Ram M et al (2008) The tropical biodiversity data gap: addressing disparity in global monitoring. Trop Conserv Sci 1(2):75–88Google Scholar
  21. Craigie ID, Baillie JEM et al (2010) Large mammal population declines in Africa’s protected areas. Biol Conserv 143(9):2221–2228CrossRefGoogle Scholar
  22. Crall AW, Newman GJ, Stohlgren TJ, Holfelder KA, Graham J, Waller DM (2011) Assessing citizen science data quality: an invasive species case study. Conserv Lett 4(6):433–442CrossRefGoogle Scholar
  23. Danielsen F, Mendoza MM et al (2003) Biodiversity monitoring in developing countries: what are we trying to achieve? Oryx 37(4):407–409Google Scholar
  24. Danielsen F, Burgess N et al (2005) Monitoring matters: examining the potential of locally-based approaches. Biodivers Conserv 14(11):2507–2542CrossRefGoogle Scholar
  25. Danielsen F, Burgess ND et al (2009) Local participation in natural resource monitoring: a characterization of approaches. Conserv Biol 23(1):31–42PubMedCrossRefGoogle Scholar
  26. GWD (Ghana Wildlife Division) (2005) Mole National Park Management Plan. Forestry Commission, Government of Ghana, WDSP Report No 54, September 2005, p 141Google Scholar
  27. Gaston KJ, Jackson SE et al (2008) The ecological performance of protected areas. Annu Rev Ecol Evol Syst 39:93–113CrossRefGoogle Scholar
  28. Gavin MC, Solomon JN et al (2010) Measuring and monitoring illegal use of natural resources. Conserv Biol 24(1):89–100PubMedCrossRefGoogle Scholar
  29. Gray M, Kalpers J (2005) Ranger based monitoring in the Virunga–Bwindi region of East-Central Africa: a simple data collection tool for park management. Biodivers Conserv 14(11):2723–2741CrossRefGoogle Scholar
  30. Haughland DL, Hero JM et al (2010) Planning forwards: biodiversity research and monitoring systems for better management. Trends Ecol Evol 25(4):199–200PubMedCrossRefGoogle Scholar
  31. Hoppe-Dominik B, Kuehl HS, Radl G, Fischer F (2011) Long-term monitoring of large rainforest mammals in the Biosphere Reserve of Tai National Park, Cote d’Ivoire. Afr J Ecol 49(4):450–458CrossRefGoogle Scholar
  32. Jachmann H (2002) Comparison of aerial counts with ground counts for large African herbivores. J Appl Ecol 39(5):841–852CrossRefGoogle Scholar
  33. Jachmann H (2008a) Illegal wildlife use and protected area management in Ghana. Biol Conserv 141(7):1906–1918CrossRefGoogle Scholar
  34. Jachmann H (2008b) Monitoring law-enforcement performance in nine protected areas in Ghana. Biol Conserv 141(1):89–99CrossRefGoogle Scholar
  35. Jones KE, Bielby J et al (2009) PanTHERIA: a species-level database of life history, ecology, and geography of extant and recently extinct mammals. Ecology 90(9):2648CrossRefGoogle Scholar
  36. Keane A, Jones JPG, Milner-Gulland EJ (2011) Encounter data in resource management and ecology: pitfalls and possibilities. J Appl Ecol 48(5):1164–1173CrossRefGoogle Scholar
  37. Kéry M, Dorazio RM, Soldaat L, van Strien A, Zuiderwijk A, Royle JA (2009) Trend estimation in populations with imperfect detection. J Appl Ecol 46(6):1163–1172Google Scholar
  38. Kindberg J, Ericsson G et al (2009) Monitoring rare or elusive large mammals using effort-corrected voluntary observers. Biol Conserv 142(1):159–165CrossRefGoogle Scholar
  39. Krebs CJ (1999) Ecological methodology, 2nd edn. Addison Wesley Longman, Menlo ParkGoogle Scholar
  40. Kremen C, Merenlender AM et al (1994) Ecological monitoring—a vital need for integrated conservation and development programs in the tropics. Conserv Biol 8(2):388–397CrossRefGoogle Scholar
  41. Kremen C, Ullmann KS, Thorp RW (2011) Evaluating the quality of citizen-scientist data on pollinator communities. Conserv Biol 25(3):607–617PubMedCrossRefGoogle Scholar
  42. Larrucea ES, Brussard PF et al (2007) Cameras, coyotes, and the assumption of equal detectability. J Wildl Manag 71(5):1682–1689CrossRefGoogle Scholar
  43. Lindenmayer DB, Likens GE (2009) Adaptive monitoring: a new paradigm for long-term research and monitoring. Trends Ecol Evol 24(9):482–486PubMedCrossRefGoogle Scholar
  44. Long RA, MacKay P et al (eds) (2008) Noninvasive survey methods for carnivores. Island Press, WashingtonGoogle Scholar
  45. Morris WF, Doak DF (2002) Quantitative conservation biology: theory and practice of population viability analysis. Sinauer Associates, Inc., SunderlandGoogle Scholar
  46. Mueller JG, Assanou IHB, Guimbo ID, Almedom AM (2010) Evaluating rapid participatory rural appraisal as an assessment of ethnoecological knowledge and local biodiversity patterns. Conserv Biol 24(1):140–150PubMedCrossRefGoogle Scholar
  47. Nichols JD, Williams BK (2006) Monitoring for conservation. Trends Ecol Evol 21(12):668–673PubMedCrossRefGoogle Scholar
  48. Noss AJ, Cuellar E, Cuellar RL (2004) An evaluation of hunter self-monitoring in the Bolivian Chaco. Hum Ecol 32(6):685–702CrossRefGoogle Scholar
  49. Ntiamoa-Baidu Y (1987) West African wildlife: a resource in jeopardy. Unasylva 39:27–35Google Scholar
  50. Oates JF (2002) West Africa: tropical forest parks on the brink. In: Terborgh J, von Schaik C, Davenport L, Madhu R (eds) Making parks work: strategies for preserving tropical nature. Island Press, Washington, pp 57–75Google Scholar
  51. O’Brien TG, Baillie JEM et al (2010) The Wildlife Picture Index: monitoring top trophic levels. Anim Conserv 13(4):335–343CrossRefGoogle Scholar
  52. O’Connell AF, Nichols JD, et al (eds) (2010) Camera traps in animal ecology: methods and analyses. Springer, TokyoGoogle Scholar
  53. Oksanen J, Blanchet FG, et al (2011) vegan: community ecology package. R package version 1.17-12. http://CRAN.R-project.org/package=vegan
  54. Pegg PJ (1969) Report to the government of Ghana on wildlife management in the Mole Game Reserve. UNDP and FAO, RomeGoogle Scholar
  55. Pollock KH, Nichols JD et al (2002) Large scale wildlife monitoring studies: statistical methods for design and analysis. Environmetrics 13(2):105–119CrossRefGoogle Scholar
  56. R Core Development Team (2011) R: a language and environment for statistical computing. R Foundation for Statistical Computing, ViennaGoogle Scholar
  57. Schmeller DS et al (2009) Advantages of volunteer-based biodiversity monitoring in Europe. Conserv Biol 23:307–316PubMedCrossRefGoogle Scholar
  58. Sheil D (2001) Conservation and biodiversity monitoring in the tropics: realities, priorities, and distractions. Conserv Biol 15(4):1179–1182CrossRefGoogle Scholar
  59. Sheil D, Lawrence A (2004) Tropical biologists, local people and conservation: new opportunities for collaboration. Trends Ecol Evol 19(12):634–638PubMedCrossRefGoogle Scholar
  60. Sheppard DJ, Moehrenschlager A et al (2010) Ten years of adaptive community-governed conservation: evaluating biodiversity protection and poverty alleviation in a West African hippopotamus reserve. Environ Conserv 37(3):270–282CrossRefGoogle Scholar
  61. Silveira L, Jacomo ATA, Diniz JAF (2003) Camera trap, line transect census and track surveys: a comparative evaluation. Biol Conserv 114(3):351–355CrossRefGoogle Scholar
  62. Sinclair ARE, Byrom AE (2006) Understanding ecosystem dynamics for conservation of biota. J Anim Ecol 75(1):64–79PubMedCrossRefGoogle Scholar
  63. Stoner C, Caro T et al (2007) Changes in large herbivore populations across large areas of Tanzania. Afr J Ecol 45(2):202–215CrossRefGoogle Scholar
  64. Swann DE, Hass CC et al (2004) Infrared-triggered cameras for detecting wildlife: an evaluation and review. Wildl Soc Bull 32(2):357–365CrossRefGoogle Scholar
  65. Wells M, McShane TO (2004) Integrating protected area management with local needs and aspirations. Ambio 33(8):513–519PubMedGoogle Scholar
  66. Yoccoz NG, Nichols JD et al (2001) Monitoring of biological diversity in space and time. Trends Ecol Evol 16(8):446–453CrossRefGoogle Scholar
  67. Yoccoz NG, Nichols JD et al (2003) Monitoring of biological diversity—a response to Danielsen et al. Oryx 37(4):410CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.Department of Environmental Science, Policy and ManagementUniversity of California, BerkeleyBerkeleyUSA
  2. 2.Alberta Biodiversity Monitoring Institute, CW 405 Biological Sciences CentreUniversity of AlbertaEdmontonCanada

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