The endemic and near-endemic angiosperms of the Drakensberg Alpine Centre

Carbutt, Clinton; Edwards, T. J.

doi:10.1016/j.sajb.2005.06.001

Cited by 85 publications

(67 citation statements)

References 18 publications

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“…It includes several elements: the "Cape flora" which radiated on the Cape mountains and intermontane valleys (Marloth, 1908;Goldblatt, 1978;Linder, 2003); the Drakensberg Alpine Center in the Drakensberg (Hilliard and Burtt, 1987;Carbutt and Edwards, 2006); the Namaqualand semidesert flora (Cowling et al, 1999;Snijman, 2013); and outliers further to the north in the Zimbabwean Chimanimani (Phipps and Goodier, 1962). Typical elements are Restionaceae (e.g., Elegia), Proteaceae (e.g., Protea, Mimetes), as well as taxa typical of the Drakensberg grasslands (e.g., Brownleea, Kniphofia).…”

Section: Austro-temperate Floramentioning

confidence: 99%

The evolution of African plant diversity

Linder¹

2014

Front. Ecol. Evol.

164

162

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Section: Austro-temperate Floramentioning

confidence: 99%

The evolution of African plant diversity

Linder¹

2014

Front. Ecol. Evol.

164

162

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“…The topography of the province is diverse, with altitudes of <1200 m in the south and 3000 m in the eastern parts [20]. The eastern Free State shares a border with the northern part of the Kingdom of Lesotho where the highest region of the Drakensberg escarpment is located.…”

Section: Study Areamentioning

confidence: 99%

“…In this study a frost day is considered as any day in which daily minimum temperature is equal to or less than 0 ∘ C. Organization of the data was done on a dekadal (10-day) basis. The first 10 days of the month are grouped as the first dekad of the month, the second 10 days (11)(12)(13)(14)(15)(16)(17)(18)(19)(20) as the second dekad, and the final days (21 to 28, 29, 30, or 31 depending on the month and year) as the last dekad of the month. The study investigated frost occurrence on three different length growing periods: 100 days, 120 days, and 140 days.…”

Section: Determination Of Frost Within Growingmentioning

confidence: 99%

Spatiotemporal Variation of Frost within Growing Periods

Moeletsi

Tongwane

2017

Advances in Meteorology

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Frost is one of the devastating agroclimatological hazards affecting crop production in the Free State Province of South Africa. In this study, frost (0°C threshold) probabilities within different growing periods starting from the first dekad of October to the third dekad of February for a 100-day, 120-day, and 140-day crop were determined. The data used in the investigation was daily minimum temperature obtained from 55 weather stations located in and around the Free State Province with data from 1950 to 2010. The results show high spatial and temporal variability of frost within the different growing periods. The western, central, northern, and northwestern parts of the province have the longest planting window for all the growing lengths from mid-October to mid-January. The eastern, northeastern, southern, and southeastern parts of Free State have the highest frost risk with shortened planting window mostly from the first dekad of November to the second dekad of December. Thus, careful consideration of frost incidences is important for successful crop production in this area.

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“…The potential information inferred from elevation data separate from climate data is particularly important in mountainous regions such as the Eastern Mountain Region (EMR) of South Africa (which includes the DAC) where plant diversity is high and plant morphology varies tremendously as a result of the range of ecological habitats available (Körner 2003;Linder 2005;Carbutt and Edwards 2006). Therefore, we tested if elevation differed significantly among these species that occur in the Drakensberg and surrounding mountain regions, as we could thus investigate if elevation reflected potential differences in microhabitat temperature as altitude increases (Grab 2013) that climate variables at this scale could not identify.…”

Section: Climatic Data Compilationmentioning

confidence: 99%

Climate and leaf shape relationships in four Helichrysum species from the Eastern Mountain Region of South Africa

Glennon

Cron

2015

Evol Ecol

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Morphological variation in plants can be affected by climate, which influences how species are identified as well as hypotheses of species divergence. We tested whether climatic niches were correlated with the observed morphological (leaf) variation of four geographically overlapping and reproductively similar Helichrysum species (Hilliard's Group 4 in the southern African flora). We found that two species, H. gymnocomum and H. odoratissimum, showed clear evidence for climatic niche conservatism and that across all species leaf shape was not significantly correlated with climatic niche. Interestingly, there did appear to be a pattern, albeit statistically non-significant, that linked cold, dry climates to leaf shape, particularly for the variable and widespread H. odoratissimum. For example, smaller, narrower leaf shapes were generally found in cooler, drier regions, while large, broad leaves (particularly those of H. odoratissimum) are found in warmer, more humid regions. In addition, the data also showed that two species, H. odoratissimum and H. gymnocomum, comprised a single variable group. The climate-leaf shape patterns could potentially reflect the morphological variation between these two species. Collectively, these findings suggest further work is necessary to determine the role of climate and leaf shape variation in species divergence in the Eastern Mountain Region.

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The endemic and near-endemic angiosperms of the Drakensberg Alpine Centre

Cited by 85 publications

References 18 publications

The evolution of African plant diversity

The evolution of African plant diversity

Spatiotemporal Variation of Frost within Growing Periods

Climate and leaf shape relationships in four Helichrysum species from the Eastern Mountain Region of South Africa

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