Land degradation and vegetation distribution in Chott El Beida wetland,Algeria |
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| Authors: | M Khaznadar IN Vogiatzakis GH Griffiths |
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| Institution: | 1. Department of Environmental Management, Mediterranean Agronomic Institute of Chania, P.O. Box 85, 73100 Chania, Greece;2. Centre for Agri-Environmental Research (CAER), School of Agriculture, Policy and Development, The University of Reading, Earley Gate, Reading, Berks RG6 6AR, UK;3. The Landscape and Climate Research Group, Department of Geography, The University of Reading, Whiteknights, Reading, Berks RG6 6AB, UK;1. Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China;2. Beijing Key Laboratory of Wetland Services and Restoration, Beijing 100091, China;1. University of Bonn, Steinmann Institute of Geology, Mineralogy and Paleontology, Nussallee 8, 53115 Bonn, Germany;2. University of Bonn, Institute of Crop Science and Resource Conservation, Department of Plant Nutrition, Karlrobert-Kreiten-Str. 13, 53115 Bonn, Germany;3. University of Bonn, Institute of Geography, Meckenheimer Allee 166, 53115 Bonn, Germany;4. University of KwaZulu-Natal, Centre for Water Resources Research, Pietermaritzburg, South Africa;5. Juelich Research Center, Institute of Bio- and Geosciences, Agrosphere IBG-3, 52425 Jülich, Germany;6. University of Bonn, Institute of Food and Resource Economics, Nussallee 21, 53115 Bonn, Germany;7. University of Bonn, Institute of Organic Agriculture, Katzenburgweg 3, 53115 Bonn, Germany;1. Fenner School of Environment and Society, The Australian National University, Canberra, ACT 0200, Australia;2. CSIRO Land and Water, Canberra, ACT 2601, Australia;1. Nanotechnology and Water Sustainability Research Unit, Florida Science Campus, 1710, Johannesburg, South Africa;2. Department of Chemistry, Mzuzu University, Private Bag 201, Luwinga, Mzuzu II, Malawi;3. Department of Geography, Mzuzu University, Private Bag 201, Luwinga, Mzuzu II, Malawi;1. Dept. Life Sciences, University of Siena, Via Mattioli, 4, 53100 Siena, Italy;2. Dept. Sciences, University of Roma TRE, V.le Marconi 446, 00146 Roma, Italy |
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| Abstract: | The aim of this study is to explore the environmental factors that determine plant community distribution in northeast Algeria. This paper provides a quantitative analysis of the vegetation–environment relationships for a study site in the Chott El Beida wetland, a RAMSAR site in Setif, Algeria. Sixty vegetation plots were sampled and analysed using TWINSPAN and Detrended Correspondence Analysis (DCA) in order to identify the principal vegetation communities and determine the environmental gradients associated with these. 127 species belonging to 41 families and 114 genera were recorded. Six of the recorded species were endemic representing 4.7% of the total species. The richest families were Compositae, Gramineae, Cruciferae and Chenopodiaceae. Therophytes and hemicryptophytes were the most frequent life forms. The Mediterranean floristic element is dominant and is represented by 39 species. The samples were classified into four main community types. The principal DCA axes represent gradients of soil salinity, moisture and anthropogenic pressure. The use of classification in combination with ordination techniques resulted in a good discrimination between plant communities and a greater understanding of controlling environmental factors. The methodology adopted can be employed for improving baseline information on plant community ecology and distribution in often critically endangered Mediterranean wetland areas. |
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