Abstract
Counting mycorrhizal infective propagules (spores, fruitbodies, colonized roots) in forest soils was used to assess impacts of shifting cultivation and selective logging on habitat partitioning and abundance of inoculum of arbuscular mycorrhizal and ectomycorrhizal fungi in south Cameroon. Intact soil cores, disturbed soil samples and fruitbodies were collected from late successional forest stands inside and outside the crown projection of ectomycorrhizal clumps, early successional forest stands, fallows of Chromolaena odorata with and without Gnetum lianas, fields of food crops, forestry practices including skid trails and bare soil landings. Fractional mycorrhizal colonisation was assessed by the gridline intersect method. Spores of arbuscular mycorrhizal fungi were extracted by the wet-sieving and decanting method followed by sugar centrifugation and counted under microscope. Fruitbodies of ectomycorrhizal fungi were collected, described in fresh state, dried before microscopic examination and identification.
Due to creation of skid trails, landings and forest roads, selective logging had a very large negative impact on both ectomycorrhizae and arbuscular mycorrhizae (AM) whereas shifting cultivation had only a slight positive effect on arbuscular mycorrhizas and a negative effect on ectomycorrhizae. Both types of mycorrhizal inocula were differently partitioned: AM inoculum was continuous throughout the landscape while ectomycorrhizal inoculum was patchy, suggesting the need for different management approaches for both arbuscular mycorrhizal and ectomycorrhizal forest patches. Ectomycorrhizal forest clumps indicated least disturbed forest stands. Owing to their specific biodiversity, they should be included as indicators of sustainable forest management; Carpophores of ectomycorrhizal fungi classify as sub-indicators in the principles, criteria and indicators of African Timber Organizatio/International Tropical Timber Organization (ATO/IITO)
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References
Alexander I.J. 1987. Ectomycorrhizas in indigenous lowland tropical forest and woodland.7th NACOM, Sylvia D.M., Hung L.L., Graham J.H. (eds). IFAS, Univ. Florida, Gainesville, Fl, May 3–8, 1987, pp. 15–1.
Alexander I., Ahma N. and See L.S. 1992. The role of mycorrhizas in the regeneration of some Malaysian forest trees. Phil. Trans. R. Soc. Lond., ser. B 335: 379–388.
Anonymous, 2003: ATO/IITO Principles, criteria and indicators for the sustainable management of natural tropical forests. IITO Policy Development Series nˆ14, Yokohama, Japon.
Béreau M., Gazel M. and Garbaye J. 1997. Les symbioses mycorhiziennes des arbres de la forêt tropicale humide de Guyane française. Can. J. Bot. 75: 711–716.
Connell J.H. and Lowman M. 1989. Low-diversity tropical rain forests: some possible mechanisms for their existence. Am. Nat. 134: 88–119.
Fassi B. and Moser M. 1991. Mycorrhizae in the natural forest of tropical Africa and the Neotropics. In: Fontana A. (ed.), Funghi, Piante e Suolo, Centro di studio Micologia del Consiglio nazionalle delle Ricerche, Torino, Italy, pp. 183–202.
Franqueville A. 1973. Atlas régional sud-ouest. République Unie du Cameroun. ORSTOM, Yaoundé, Cameroun
Habte M. 1989. Impact of simulated erosion on the abundance and activity of indigenous vesicular-arbuscular mycorrhizal endophytes in an oxisol. Biol.Fertil. Soils. 7: 164–167.
Hart T.B., Hart J.A. and Murphy P.H. 1989. Mono-dominant and species-rich forests of the humid tropics: causes for their occurrence. Am. Nat. 133: 613–633.
Letouzey R. 1968. Etude phytogéographique du Cameroun. Ed. P. Le Chevalier, Paris.
Newbery D.M., Alezander I.J., Thomas D.W. and Gartlan J.S. 1988. Ectomycorrhizal rain forest legumes and soil phosphorus in Korup National Park, Cameroon, New Phytol. 109: 367–409.
Newbery D.M., Alezander I.J. and Gartlan J.S. 1997. Phosphorus dynamics in lowland African rain forest: the influence of ectomycorrhizal trees. Ecological Monographs 67(3): 367–409.
Newsham K.K., Fitter A.H. and Watkinson A.R. 1995. Multifunctionality and biodiversity in arbuscular mycorrhizas. Trends Ecol. Evol. 10: 407–411.
Onguene N.A. 2000. Mycorrhizal diversity and dynamics in south Cameroon.
Onguene N.A. and Kuyper T.H.W. 2001. Mycorrhizal associations in rain forest of south Cameroon. For. Ecol.Manag. 140: 277–287.
Plenchette C., Fortin J.A. and Furlan V. 1983. Growth response of several plant species to mycorrhizae in a soil of moderate P- fertility. II. Soil fumigation induced stunting of plants corrected by reintroduction of the wild endomycorrhizal flora. Plant and Soil 70: 211–217.
Sieverding E. 1991. Vesicular-arbuscular mycorrhiza management in tropical agrosystems. Eschborn, Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ) GmbH.
SPSS Inc. 1993. SPSS – X users’Guide. 4th ed. Gorinchem, the Netherlands.
Torti S.D. and Coley P.D. 1999. Tropical monodominance: a preliminary test of the ectomycorrhizal hypothesis. Biotropica 31: 220–228.
Torti S.D., Coley P.D. and Kursar T.A. 2001. Causes and consequences of monodominance in tropical lowland forest. Am. Nat. 157:141–153.
Voorhoeve A.G. 1964. Some notes on the tropical rainforest of the Yoma-Gola national forest near Bomi Hills, Liberia. Commonw. For. Rev. 43: 17–24.
Van Gemerden B.S. and Hazeu G.W. 1999. Landscape ecological survey (1:100 000) of the Bipindi-AkomII-Lolodorf region, Southwest Cameroon. Tropenbos Documents 1: 1–164.
Waterloo M.J., Ntonga J.C., Dolman A.J. and Ayangma A.B. 2000. Impact of land use change on the hydrology and erosion of rain forest land in South Cameroon. DLO Winand Staring Centre Report 134: 1–89.
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Onguene, N.A. (2007). Mycorrhizal associations as indicators of forest quality after land use practices. In: Bationo, A., Waswa, B., Kihara, J., Kimetu, J. (eds) Advances in Integrated Soil Fertility Management in sub-Saharan Africa: Challenges and Opportunities. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-5760-1_80
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DOI: https://doi.org/10.1007/978-1-4020-5760-1_80
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