Life form and species diversity on abandoned croplands, Roggeveld, South Africa

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dc.contributor.author Van der Merwe, Helga
dc.contributor.author Van Rooyen, M.W. (Margaretha W.), 1950-
dc.date.accessioned 2012-05-02T08:38:52Z
dc.date.available 2012-05-02T08:38:52Z
dc.date.issued 2012-03
dc.description.abstract The Roggeveld consists of an island of Mountain Renosterveld (Fynbos biome) surrounded by Succulent Karoo biome vegetation. Since management of abandoned croplands depends on a better understanding of their succession sequences, vegetation recovery on abandoned croplands in the Roggeveld was studied using species and life form diversity parameters. Abandoned croplands of different ages were compared with each other and to the natural vegetation. Therophytes and chamaephytes were the most abundant life forms. Chamaephytes made an overwhelming contribution to the relative cover. Species-area curves (exponential function) differed significantly between the abandoned croplands and natural vegetation. Species richness increased with time since abandonment but no similar increase in species evenness, Shannon or Simpson indices were found. A regression of species richness against age of abandoned cropland predicted that an abandoned cropland of approximately 33 years should be as species rich as the natural vegetation, but a principal cooordinate analysis of floristic data indicated that all the plots were floristically still extremely different from the natural vegetation. Across all nine survey plots only 15 species contributed to a high cover on the plots. Vegetation recovery on abandoned croplands in the Roggeveld occurs naturally, yet the rate of recovery varies among the life forms. en
dc.description.librarian nf2012 en
dc.description.sponsorship The National Research Foundation under grant number 61277. en_US
dc.description.uri http://www.tandfonline.com/loi/tarf20 en_US
dc.identifier.citation Van der Merwe, H & Van Rooyen, MC 2012, 'Life form and species diversity on abandoned croplands, Roggeveld, South Africa', African Journal of Range and Forage Science, vol. 28, no. 3, pp. 99-110. en
dc.identifier.issn 1727–9380 (online)
dc.identifier.issn 1022–0119 (print)
dc.identifier.other 10.2989/10220119.2011.642097
dc.identifier.uri http://hdl.handle.net/2263/18638
dc.language.iso en en_US
dc.publisher Taylor & Francis en_US
dc.rights © NISC (Pty) Ltd en_US
dc.subject Vegetation recovery en
dc.subject Abandoned croplands en
dc.subject.lcsh Plant diversity conservation -- South Africa -- Little Karoo en
dc.subject.lcsh Fynbos ecology -- South Africa -- Little Karoo en
dc.subject.lcsh Succulent plants -- South Africa -- Little Karoo en
dc.subject.lcsh Species diversity -- South Africa -- Little Karoo en
dc.title Life form and species diversity on abandoned croplands, Roggeveld, South Africa en
dc.type Postprint Article en


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