Effects of Dichrostachys cinerea (l.) Wight & Arn (Fabaceae) on herbaceous species in a semi-arid rangeland in Zimbabwe
| Autor: | Clarice Mudzengi, Shakkie Kativu, Everson Dahwa, Xavier Poshiwa, Chrispen Murungweni |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Nature Conservation, Vol 7, Iss 0, Pp 51-60 (2014) |
| Druh dokumentu: | article |
| ISSN: | 1314-6947 1314-3301 |
| DOI: | 10.3897/natureconservation.7.5264 |
| Popis: | Anthropogenic alteration of an environment and other disturbance regimes may enable the expansion of some native species into new geographical areas, a phenomenon observed with Dichrostachys cinerea. Five D. cinerea invaded sites, each approximately one hectare in size were assessed for the effects of D. cinerea on native herbaceous species diversity, richness, basal cover, litter cover, top hamper and plant vigour. The same attributes were studied in five uninvaded sites adjacent to, and equal in size to each invaded site. Forty herbaceous species were identified in the area. There were significant differences (P < 0.05) noted in species richness, basal cover, litter cover, top hamper, plant vigour, and species diversities between invaded and uninvaded sites, with uninvaded sites recording higher values than invaded sites. Altitude, erosion and the edaphic variables pH, N, P and K, which were included as explanatory variables, also differed significantly (P |
| Databáze: | Directory of Open Access Journals |
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