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Abundance and Diversity of Woody Undergrowth Reservoir as Indicator of Suitable Vegetation Patch for Natural Regeneration

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Open Journal of Ecology 2022年第2期12卷 113-132页

作者： Saran Traoré Issiaka Keïta Sébastien Ange Habih Nombré Hassan Bismarck Nacro Brice Sinsin UFR/de la Vie et de la Terre Université Nazi Boni Bobo-Dioulasso Burkina Faso Laboratoire d’Etude et de Recherche en Fertilité de Sols IDR Université Nazi Boni Bobo-Dioulasso Burkina Faso Laboratoire de Biologie et Ecologie Végétales UFR-Sciences de la Vie et de la Terre Université Joseph Ki-Zerbo Ouagadougou Burkina Faso Laboratoire d’Ecologie Appliquée Faculté des Sciences Agronomiques Université d’Abomey-Calavi Cotonou République du Bénin

The diversity, abundance and height structure of naturally regenerated woody species were analyzed and compared for undergrowth reservoir associated with vegetation patches as bowal, shrubland and woodland for understanding the effect of vegetation conditions on spatial distribution of woody plants in sudanian ecosystem. All undergrowth individuals (height 2) laid out in each vegetation patch during rainy season. In total 52 undergrowth species and 2224 stems arranged in 38 genera and 21 families out of which 25, 36 and 38 species were found in bowal, shrubland and woodland respectively and 15 shared species. Combretaceae, Caesalpiniaceae and Mimosaceae families were the most abundant and species density was significantly higher (P < 0.05) in shrubland and woodland than bowal, and increase diversity in only shrubland (P = 0.002) comparing with bowal. Undergrowth was abundantly concentrated in small height class as canopy benefit and indicate a specific-site distribution. Results also showed that bowal had a particular vegetation which vary in function of tree community characters in place (P < 0.05) while woodland and shrubland are similar vegetation patches. As conclusion, the study vegetation patches form suitable regeneration niches for the undergrowth reservoir of limited number of species which in return can be predictor of species richness and abundance and thus the structure of tree community. Woody undergrowth community could be considered in biodiversity management and degraded land restoration. Supplementary works could be undertaken to understand the characteristics of seed bank for bowal, shrubland and woodland regarding the undergrowth and tree communities.

关键词： Biodiversity Conservation Burkina Faso Regeneration Spatial Heterogeneity sudanian ecosystems

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