A phytosociological classification of the Nylsvley Nature Reserve

Coetzee, Ben; Meulen, Frank van der; Zwanziger, S.; Gonsalves, P.; Weißer, Peter

doi:10.4102/abc.v12i1.1388

Cited by 66 publications

(36 citation statements)

References 7 publications

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“…This community is related to the Setaria lindenbergiana -Ehretia rigida Bush clumps (Coetzee et al 1995), the Setaria lindenbergiana -Acacia caffra Woodland described by Coetzee (1975) In parts of the plant community stands of Protea caffra (Species Group F) and the scarcer Protea roupelliae (Species Group F) are prominent, indicating an affinity with the Drakensberg Highveld Sourveld (Sourveld) vegetation.…”

Section: Vegetationmentioning

confidence: 99%

Natural woodland vegetation and plant species richness of the urban open spaces in Gauteng, South Africa

Grobler

Bredenkamp

Brown

2002

Koedoe

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It is estimated that approximately 60 % of the world's population will be living in urban areas by 2025. In Gauteng, the most densely populated province in South Africa, the natural open spaces are continually under threat from development. Vegetation is the most physical representation of the environment on which all animals are ultimately dependent. In order to evaluate an areas potential for development or conservation it is necessary to make a thorough inventory of the plant communities and their associated habitats. A survey of the natural woodlands was undertaken as part of a project describing the vegetation of the natural open spaces within the Gauteng region. Relevés were compiled in 73 stratified random sample plots in selected open spaces within the study area. A TWINSPAN classification, refined by Braun-Blanquet procedures, indicated six woodland communities that can be grouped into two major woodland communities. A classification and description of these communities as well as their species richness are presented. The results indicate that there are still patches of well-preserved natural vegetation within the study area and contribute to the limited knowledge that presently exists for the vegetation of the area.

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Section: Vegetationmentioning

confidence: 99%

Natural woodland vegetation and plant species richness of the urban open spaces in Gauteng, South Africa

Grobler

Bredenkamp

Brown

2002

Koedoe

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“…NNR is a semi-arid, mixed bushveld region, containing a natural vegetation structure and a high degree of endemic plant diversity (Coetzee et al 1977). With a small number of unpaved roads and daytime tourists visiting the park, NNR has remained relatively untouched by anthropogenic disturbance.…”

Section: Study Sitesmentioning

confidence: 99%

The hustle and bustle of city life: monitoring the effects of urbanisation in the African lesser bushbaby

Scheun

Bennett

Ganswindt

et al. 2015

Sci Nat

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Urbanisation has become a severe threat to pristine natural areas, causing habitat loss and affecting indigenous animals. Species occurring within an urban fragmented landscape must cope with changes in vegetation type as well as high degrees of anthropogenic disturbance, both of which are possible key mechanisms contributing to behavioural changes and perceived stressors. We attempted to elucidate the effects of urbanisation on the African lesser bushbaby, Galago moholi, by (1) recording activity budgets and body condition (body mass index, BMI) of individuals of urban and rural populations and (2) further determining adrenocortical activity in both populations as a measure of stress via faecal glucocorticoid metabolite (fGCM) levels, following successful validation of an appropriate enzyme immunoassay test system (ACTH challenge test). We found that both sexes of the urban population had significantly higher BMIs than their rural counterparts, while urban females had significantly higher fGCM concentrations than rural females. While individuals in the urban population fed mainly on provisioned anthropogenic food sources and spent comparatively more time resting and engaging in aggressive interactions, rural individuals fed almost exclusively on tree exudates and spent more time moving between food sources. Although interactions with humans are likely to be lower in 2 nocturnal than in diurnal species, our findings show that the impact of urbanisation on nocturnal species is still considerable, affecting a range of ecological and physiological aspects.

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“…The main characteristics of the six supersites are presented in Table 2 [Werger and Coetzee, 1978]. The savanna vegetation is composed of a mosaic of broad-leafed and ffme-leafed savannas with Burkea africana and Acacia tortJills dominating the woody component in the former and latter ecosystems, respectively [Coetzee et al, 1976]. In addition, measurements were also taken on a seasonally wetted grassland.…”

mentioning

confidence: 99%

Comparison of nitrogen monoxide emissions from several African tropical ecosystems and influence of season and fire

Serça¹,

Delmas²,

Roux³

et al. 1998

Global Biogeochemical Cycles

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Abstract. NO emission rates from soils were measured for twelve major African ecosystems in four countries (Congo, Niger, Ivory Coast, and South Africa) and within four major phytogeographic domains: the Guineo-Congolese, Guinean, Sahelian, and Zambezian domains. Measurements were performed during wet and/or dry seasons. All the measurements were made with the same dynamic chamber device, which allowed true comparisons to be made. This study showed that emission rates strongly differed between ecosystems and exhibited a marked temporal variability. Ecosystem effect was highly significant during both the dry and wet seasons. Emission rates were low (<0.6 ng NO-N m s ) m Hyparrhema and Loudetta savannas of the Guinean or Guineo-Congolese domains. Intermediate NO fluxes were obtained in rain forest and gallery forest ecosystems, in a broad-leafed savanna and in a seasonally wetted grassland (sandy soil) of the Zambezian domain, and in a dry fallow savanna of the Sahelian domain. Emission rates were maximum (>7 ng NO-N rn -2 s 4) in a seasonally wetted grassland (site 2) and in particular sites subjected to various disturbances, for example soil fauna activity (termite mounds) or past human disturbance (Acacia patches-settlement site). Microbial activity potentials (i.e., carbon mineralization, nitrification, denitfification, and total net N mineralization) were determined for most of the soils where NO fluxes were measured. In some sites, these potential activities were useful to identify the major processes controlling NO emission rates. Denitrificafion potential was very low and could not explain substantial NO fluxes from broadand fine-leafed savannas and Hyperthelia savannas of the Zambezian domain. Very low potentials of both nitrification and denitrification could be related to the low NO fluxes for the three Guinean savanna sites studied. NO fluxes were significantly higher during the wet season than the dry season in both savanna and forest ecosystems. Emission rates in savanna ecosystems were significantly increased within a few hours after fire. The measurements presented here provide a unique, consistent database which can be used to fixabet analyze the processes involved in the spatial and temporal variations of NO emissions.

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A phytosociological classification of the Nylsvley Nature Reserve

Cited by 66 publications

References 7 publications

Natural woodland vegetation and plant species richness of the urban open spaces in Gauteng, South Africa

Natural woodland vegetation and plant species richness of the urban open spaces in Gauteng, South Africa

The hustle and bustle of city life: monitoring the effects of urbanisation in the African lesser bushbaby

Comparison of nitrogen monoxide emissions from several African tropical ecosystems and influence of season and fire

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