Advertisement

Biodiversity Conservation and Carbon Sequestration in Cocoa Agroforest in Southern Cameroon

  • Louisa Zapfack
  • Jean Kotto-Same
  • Amougou Akoa
  • Gaston Achoundong
Chapter

Abstract

The study is conducted in semi deciduous rain forest zone of southern Cameroon to appreciate the impact of cocoa agroforest on plant biodiversity conservation and carbon sequestration. Twenty-four transects of 1.5 km long and 10 m wide were established in eight villages to evaluate the cover percentage of cocoa compare to other land use system (LUS). Forty five plots of 625 m2 (25 m x 25 m) each were surveyed in these villages. In these plots, all the individuals with DBH (Diameter at the Breast Height) greater or equal to 4 cm were recorded. The destructive method was used to evaluate carbon sequestration in different LUS for herbaceous plants, small woody plants, litter and roots, while the allometric equation of Brown was used for all individuals with DBH ≥ 4 cm. Seven LUS were identified in the Yaounde region: 23 % of these were cultivated land, 36 % were fallows, 16 % were cocoa field and 5 % represented the secondary forest derived from the slash and burn practices. In the regions of Mbalmayo and Ebolowa, eight LUS were identified, of which six shared with the region of Yaounde and two different, the degraded forest and swampy forest. Species encountered in cocoa agroforest represent 33.78 % of the total flora of the area. Fruit trees were abundant in those villages which have access to market (Persea americana, Dacryodes edulis, Citrus spp), while in Ambam region, original forest species mostly timber species were encountered (Baillonella toxisperma, Guibourtia tessmannii, Terminalia superba, Milicia excels). This agroforest can accumulate about 251.14 t C/ha. Theobroma cacao hosted about 21.51 t C/ha. The root system of cover species stocks an important quantity of carbon.

Keywords

Cocoa agroforest Land use system Biodiversity Carbon sequestration Cameroon 

References

  1. Aldhous P (1993) Tropical deforestation: not just a problem in the Amazon. Science 259:1350CrossRefGoogle Scholar
  2. Anderson JM, Ingram JSI (1993) Tropical soil biology and fertility: A Handbook methods. CAB International, Wallingford, p 221Google Scholar
  3. Bartholomew WV, Meyer J, Laudelout H (1953) Mineral nutrient immobilisation under forest and grass fallow in the Yangambi region. Serie Scientifique No 27 Brussels. Institut National pour l’Etude Agronomique du CongoGoogle Scholar
  4. Brown S, Hall CAS, Knabe W, Raich J, Trexler MC, Woomer PL (1993) Tropical forest: their past, present and potential future roles in the world’s carbon budget. Water Air Soil Pollut 70:71–94CrossRefGoogle Scholar
  5. Cenadefor (1989) Carte de synthèse forestière. Echelle: 1/500000. The National Center For Forestry Development, YaoundeGoogle Scholar
  6. Daget J (1976) Les méthodes mathématiques en écologie. Masson, Paris, Collection d’EcologieGoogle Scholar
  7. Dajoz R (1982) Précis d’écologie. 4e édition. Paris, BordasGoogle Scholar
  8. Frontier S, Pichod-Viale D (1993) Ecosystèmes: structure, fonctionnement, évolution. Collection d’écologie 21. Masson ParisGoogle Scholar
  9. Kotto SJ, Woomer PL, Moukam A, Zapfack L (1997) Carbon dynamics in slash-and-burn agriculture and land use alternatives of the humid forest zone of Cameroon. Agriculture, Ecosys Environ 65:245–256CrossRefGoogle Scholar
  10. Letouzey R (1985) Notice de la carte phytogéographique du Cameroun au 1/50000. Domaine de la forêt dense semi-décidue. IRA-Yaoundé et ICIV Toulouse, pp 76–85Google Scholar
  11. Manga T (1994) Alternatives to slash-and-burn project: Cameroon benchmark site annual report. IRA, YaoundeGoogle Scholar
  12. Piélou EC (1966) Species diversity and patten diversity in study of ecological succession. J Theor Biol 10:370–383CrossRefGoogle Scholar
  13. Sanchez PA (1976) Properties and management of soil in the tropics. Wiley, New YorkGoogle Scholar
  14. Thenkabail PS (1995) Benchmark research area in the forest margin, Cameroon. Normalised difference vegetation Index (NDVI). Poster, Resource and Crop Management Division. International Institute of Tropical Agriculture, IbadanGoogle Scholar
  15. White F (1983) The vegetation of Africa, a descriptive memoir to accompany the UNESCO/AETFAT/UNSO vegetation map of Africa. UNESCO Natural Resour Res 20:1–356Google Scholar
  16. Woomer PL, Palm CA (1998) An approach to estimating system carbon stocks in tropical forests and associated land uses. Commonwealth Forestry Rev 77(3):181–190Google Scholar
  17. Zapfack L, Englad S, Sonké B, Achoundong G, Birang à Mandong (2002) The impact of land conversion on plant biodiversity in the forest zone of Cameroon. Biodiversity and Conservation 11:2047–2061CrossRefGoogle Scholar
  18. Szott LT, Palm CA, Davey CB (1994) Biomass and litter accumulation under managed and natural tropical fallows. Forest Ecol Manag 67:177–190CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Louisa Zapfack
    • 1
  • Jean Kotto-Same
    • 1
  • Amougou Akoa
    • 2
  • Gaston Achoundong
    • 2
  1. 1.Faculty of Science, Department of Plant BiologyUniversity of Yaoundé 1YaoundéCameroun
  2. 2.Institute of Agronomic Research for DevelopmentYaoundéCameroun

Personalised recommendations