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 Printable version |
Oti-Keran National Park open forests in the north of Togo: structure, dynamics and impacts of recent climate change |
Science et changements planétaires / Sécheresse. Volume 20, Number 4, 394-6, octobre-novembre-décembre 2009, Sécheresse en ligne, 20 (1e)
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 Résumé
Article gratuit
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Author(s) : Kossi Adjonou, Ronald Bellefontaine, Kouami Kokou |
Summary : The Anogeissus leiocarpus open forests are currently threatened and disappearing due to human activities and climate change. Having a relic aspect in the Oti-Keran National Parc, they are important for the rural populations and the wild fauna. This study has been conducted to better identify plant diversity, the dynamics and the current state of preservation. Some plant inventories have made it possible to register 326 species. The average density of the ligneous plants is 788 trees/ha. The distribution per diameter classes of the ligneous plants reveals a predominance of small diameter plants. The natural regeneration study reveals that, in our working conditions, the main ligneous species regenerate essentially by seeding (~89%) and very little by stump shoot (10.8%) and more rarely by sucker (0.4%). The temperature increase and rainfall decrease resulting from climate change have a negative impact on the ligneous plant dynamic of these forests. The effects of these phenomena are shown through an acute abnormal mortality of trees (mortality rate of 21.2%), especially at the level of the small diameter plants. |
Keywords : climate change, forest dynamics, natural regeneration, open forest, Togo |
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