Edapho-floristic characterization of different types of dune environment located near the oasis basins in Gouré (South-East Niger)
| Autor: | MAHAMANE GALADIMA, Moustapha, Tidjani, Adamou Didier, SEYNI BODO, Bachirou, ABDOU BAGNA, Amadou, Ambouta, Jean Marie Karimou |
|---|---|
| Jazyk: | francouzština |
| Rok vydání: | 2020 |
| Předmět: | |
| DOI: | 10.48421/imist.prsm/ewash-ti-v4i3.22029 |
| Popis: | The vegetation degradation in the dune environments of the southeastern zone of Niger is the leading factor of sand particles mobility, burying the cultivated land base on which populations derive most of their means of subsistence. The present study concerned three states of degradation (Mobile dunes: MD, Partially-fixed dunes: PFD and Fixed dunes: FD) of the dune environment commonly observed in the Manga dunes positioned in the immediate vicinity of the basins of Woro, Kilakina and Iskour following the North-South rainfall gradient. This study aims to characterize the vegetation and soils of dune environment subjected to humans and animals pressure due to their proximity to the basins in order to contribute to the elaboration of development plans for dune restoration and fixation. The results showed that the MD are devoid of vegetation, while PFD, and FD are covered by an herbaceous vegetation composed of 10 species, divided into 5 families with dominance of poaceae and woody species slightly diversified, consisting of 3 species distributed in 3 families and dominated by Leptadenia pyrotecnica. In term of decreasing order from FD to PFD, and from South to North, biomass production is most significant. Its values around 624.4 kg/ha of Iskour's (South) fixed. FD of Kilakina (middle), has a biomass production of 383.2 kg/ha. This proportion is relatively low on FD of Woro, which is located further north of Kilakina, with 276 kg/ha. On the PFD values are ranged around 502,4 Kg/ha, 119,6 Kg/ha and 108,8 Kg/ha respectively for Iskour, Kilakina and Woro. The cover rate and the woody vegetation are decreasing from South to North and from FD to PFD. Therefore, these results indicate the level of environmental degradation of these areas which should be taken into consideration in combating desertification (silting-up) projects in order to improve its ecosystems resilience. Environmental and Water Sciences, public Health and Territorial Intelligence Journal, Vol. 4, No 3 (2020) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|