Browsing Research Output by Author "21074968 - Siebert, Frances"
Now showing items 1-14 of 14
-
A bimodal pollination system enhances reproductive potential of translocated populations of an endangered grassland succulent
Jansen, Peter G.; Siebert, Stefan J.; Siebert, Frances; Van den Berg, Johnnie; Jordaan, Anine (AOSIS, 2019)A major concern during the translocation of higher plant species is related to habitat suitability and the availability of pollination services. Should these not meet the requirements of the plant, then successful reproduction ... -
Browsing intensity of herbaceous forbs across a semi-arid savanna catenal sequence
Siebert, F.; Scogings, P. (Elsevier, 2015)Ecological models to explain savanna heterogeneity and functioning weakly represent herbaceous forbs, which inevitably created knowledge gaps regarding the diversity and ecology of forbs. Forbs constitute over 70% of ... -
Change in dominance determines herbivore effects on plant biodiversity
Koerner, Sally E.; Siebert, Frances; Smith, Melinda D.; Burkepile, Deron E.; Hanan, Niall P. (Nature, 2018)Herbivores alter plant biodiversity (species richness) in many of the world’s ecosystems, but the magnitude and the direction of herbivore effects on biodiversity vary widely within and among ecosystems. One current theory ... -
Characterisation of the Woody assemblages of Zululand coastal thronveld along the Nseleni River
Van der Linden, Jannie P.; Siebert, Frances; Siebert, Stefan J.; Ferreirai, Daan P.; Bredenkamp, George J. (South African National Parks, 2008) -
The extended occurrence of Maputaland Woody Grassland further south in KwaZulu-Natal, South Africa
Siebert, Frances; Siebert, Stefan John; Du Toit, Marié Joey (South African National Biodiversity Institute, 2011) -
Forb community responses to an extensive drought in two contrasting land-use types of a semi-arid Lowveld savanna
Siebert, F.; Klem, J.; Van Coller, H. (Taylor & Francis, 2019)Projected increases in the frequency and severity of drought events are expected to impose changes in the ecology of native forb communities in semi-arid ecosystems. We examined the state of forb communities during, ... -
Forb ecology research in dry African savannas: knowledge, gaps, and future perspectives
Siebert, Frances; Dreber, Niels (Wiley, 2019)Savannas are commonly described as a vegetation type with a grass layer interspersed with a discontinuous tree or shrub layer. On the contrary, forbs, a plant life form that can include any nongraminoid herbaceous vascular ... -
Herbaceous biomass species diversity relationships in nutrient hotspots of a semi-arid African riparian ecosystem
Van Coller, Helga; Siebert, Frances (Taylor & Francis + NISC, 2015)The hump-back relationship between species diversity and productivity predicts highest species richness at intermediate levels of biomass, and low species numbers in least and most productive habitats. Sodic patches ... -
Herbaceous species diversity patterns across various treatments of herbivory and fire along the sodic zone of the Nkuhlu exclosures, Kruger National Park
Van Coller, Helga; Siebert, Frances; Siebert, Stefan J. (OASIS, 2013)Understanding relationships between large herbivores and plant species diversity in dynamic riparian zones is critical to biodiversity conservation. The Nkuhlu exclosures in the Kruger National Park (KNP) provided ... -
The impact of herbivore exclusion on forb diversity: comparing species and functional responses during a drought
Van Coller, Helga; Siebert, Frances (Wiley, 2020)Rainfall and herbivory shape savannah herbaceous communities, but these disturbances are being altered globally. To assess potential consequences of such alterations, we evaluated herbivore effects on species and functional ... -
Manganese tolerance of Aloe greatheadii Schönland var. davyana (Schönland) Glen & D.S.Hardy (Asphodelaceae: Alooideae) on Ultramafic-Peralkaline Outcrops, South Africa
Siebert, Stefan J.; Steytler, Janine; Boneschans, Ricart B.; Siebert, Frances; Coetzee, Marthie S. (Cactus and Succulent Society of America, 2018)Very little is known about the relations between aloes and soil metals, despite evidence that aloes often form dense populations on metalliferous soils. This study targeted eight rock outcrops where aloes dominated the ... -
Myth-busting tropical grassy biome restoration
Silveira, Fernando A. O.; Siebert, Frances; Siebert, Stefan J.; Arruda, André J.; Bond, William (Wiley, 2020)The historical focus in research and policy on forest restoration and temperate ecosystems has created misunderstandings for the restoration of tropical and subtropical old‐growth grassy biomes (TGB). Such misconceptions ... -
The vegetation and floristics of the Letaba exclosures, Kruger National Park, South Africa
Siebert, Frances; Siebert, Stefan John (AOSIS OpenJournals, 2010) -
The Vegetation and Floristics of the Nkhuhlu Exclosures, Kruger National Park.
Siebert, Frances; Eckhardt, Holger C (OpenJournals Publishing, 2008)The need to conduct research on the impact of elephant on the environment prompted the construction of exclosures along two of the most important rivers in the Kruger National Park. Scientific research on these exclosures ...