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Secondary succession in abandoned fields of dry tropical Northern Cameroon
Author(s) -
Donfack P.,
Floret Ch.,
Pontanier R.
Publication year - 1995
Publication title -
journal of vegetation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 115
eISSN - 1654-1103
pISSN - 1100-9233
DOI - 10.2307/3236348
Subject(s) - ecological succession , secondary succession , vegetation (pathology) , grassland , ecology , tropical and subtropical dry broadleaf forests , grazing , arid , geography , shifting cultivation , primary succession , agroforestry , chronosequence , environmental science , biology , land use , medicine , pathology
. This study evaluates the processes of recolonization of abandoned fields by native vegetation under conditions of intensive human activity (fire, intensive grazing, firewood cutting) in a semi‐arid tropical region savanna of northern Cameroon. Secondary plant succession was studied in two series of formerly cultivated fields 1–35 yr after the beginning of the fallow period. Floristic changes and the dynamics of woody plant populations were compared between areas with vertisols (clay texture) and sandy soils, as a function of length of fallows. Vegetation changed continuously during the 35 years following field abandonment. However, a very abrupt break occurred between 6 and 10 yr, due to increasingly intense human pressure during this period. Up to that point, ecological models and mechanisms of succession presented in the literature are more or less confirmed by our results. Usually, secondary succession is blocked at a stage of wooded grassland as a result of human activities.