Browsing POST-DOCTORAL RESEARCH OUTPUTS by Title
Now showing items 38-57 of 221
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DNA barcoding of South African Ants
(2014-03-14)The files contain sequences and collection information from a project on barcoding South African ants. Parts of the collections were done for this purpose while other samples were derived from different ant projects in ... -
Do insect distributions fit our biomes?
(Academy of Science of South Africa, 2007)An assessment of biome-specificity in southern African insect assemblages was undertaken using sweep collections in fynbos, grassland, subtropical thicket and Nama-karoo. Insect samples from the same biome generally cluster ... -
Do long-distance migratory birds track their niche through seasons?
(John Wiley & Sons Ltd, 2018)Aim: Seasonal migration by animals is an extensively studied, global phenomenon.Yet, we still lack a general understanding whether migrants track their niche between summer and winter ranges (following fixed environmental ... -
Does public awareness increase support for invasive species management? Promising evidence across taxa and landscape types
(Springer, 2017)Management of invasive species often raises substantial conflicts of interest. Since such conflicts can hamper proposed management actions, managers, decision makers and researchers increasingly recognize the need to ... -
Does the spatial sorting of dispersal traits affect the phenotype of the non-dispersing stages of the invasive frog Xenopus laevis through coupling?
In amphibians, spatial sorting progressively enhances the dispersal capacities of dispersing stages in expanding populations but may enhance or limit the performance of the earlier non-dispersing stages. Phenotypic traits ... -
Dominance–diversity relationships in ant communities differ with invasion
(John Wiley & Sons Ltd, 2018)The relationship between levels of dominance and species richness is highly contentious, especially in ant communities. The dominance-impoverishment rule states that high levels of dominance only occur in species-poor ... -
Down, but not out: Recent decline of Berg-Breede River whitefish (Barbus andrewi) in the upper Hex River, South Africa
(AOSIS, 2017)The Berg–Breede River whitefish, Barbus andrewi, an endangered Cape Floristic Region endemic, was once widespread in both the Berg and Breede River catchments. However, its distribution has been strongly reduced, apparently ... -
Dynamics of the functional groups in the weed flora of dryland and irrigated agroecosystems in the Gangetic plains of India
(Weed Science Society of Japan, 2008)The relative abundance of the weed functional types in dryland and irrigated rice in the Kharif (summer) crop field and dryland lentil and wheat in the irrigated Rabi (winter) crop field was studied at the agricultural ... -
Ecological impacts of alien species: Quantification, scope, caveats, and recommendations
(Oxford University Press, 2015)Despite intensive research during the past decade on the effects of alien species, invasion science still lacks the capacity to accurately predict the impacts of those species and, therefore, to provide timely advice to ... -
Ecological impacts of invasive alien species along temperature gradients: testing the role of environmental matching
(Ecological Society of America, 2015)Invasive alien species (IAS) can cause substantive ecological impacts, and the role of temperature in mediating these impacts may become increasingly significant in a changing climate. Habitat conditions and physiological ... -
The ecological integrity of the lower Olifants River, Limpopo province, South Africa: 2009-2015-Part B: Tributaries of the Olifants River
(Taylor & Francis, 2017)Monitoring on the Lowveld reaches of the Olifants River, Limpopo River System, and its Steelpoort, Blyde, Klaserie and Selati tributaries was initiated in 2009. Analysis of the 2009–2015 data from four Olifants River sites ... -
The ecological integrity of the Lower Olifants River, Limpopo province, South Africa: 2009-2015-Part A: Olifants River main stem
(Taylor & Francis, 2017)The major rivers of the South African ‘Lowveld’ (low-latitude savanna) suffer numerous impacts from upstream economic activities. Whereas monitoring these rivers is required to detect biodiversity losses, record ... -
Ecological niche differentiation of polyploidization is not supported by environmental differences among species in a cosmopolitan grass genus
(Botanical Society of America, 2015)• Premise of the study: Polyploidization frequently results in the creation of new plant species, the establishment of which is thought to often be facilitated by ecological niche differentiation from the diploid species. ... -
The ecology of Bactrocera tryoni (Diptera: Tephritidae): what do we know to assist pest management?
(Association of Applied Biologists, 2011)The distribution, systematics and ecology of Bactrocera tryoni, the Queensland fruit fly, are reviewed. Bactrocera tryoni is a member of the B. tryoni complex of species, which currently includes four named species, viz. ... -
The effects of intransitive competition on coexistence
(John Wiley & Sons Ltd/CNRS, 2017)Coexistence theory has been developed with an almost exclusive focus on interactions between two species, often ignoring more complex and indirect interactions, such as intransitive loops, that can emerge in competition ... -
The effects of temperature, body mass and feeding on metabolic rate in the tsetse fly, Glossina morsitans centralis
(2007)Metabolic rate variation with temperature, body mass, gender and feeding status is documented for Glossina morsitans centralis . Metabolic rate [mean ± SE; VCO2 = 19.78 ± 3.11 uL CO 2 h −1 in males (mean mass = 22.72 ± ... -
Emergence of weak-intransitive competition through adaptive diversification and eco-evolutionary feedbacks
(British Ecological Society, 2018)1. Indirect biotic interactions—such as intransitive competition—are increasingly recognized as being important in shaping ecological patterns in natural systems. Over long time-scales, such indirect interactions may ... -
Evaluation of the soil degradation state along fence-line contrasts
(Klaus Hess Publishers, 2010)Five pairs of Observatories with contrasting landuse types and/ or landuse intensities, located in the Woodland Savanna, Thornbush Savanna, Nama Karoo, and Succulent Karoo biomes were investigated to examine the infl ...