ORCID Profile
0000-0002-9065-1936
Current Organisations
Concordia University
,
University of Johannesburg
,
Universidade Estadual de Campinas
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Elsevier BV
Date: 05-2021
Publisher: Springer Science and Business Media LLC
Date: 26-10-2015
Publisher: Elsevier BV
Date: 07-2015
Publisher: AOSIS
Date: 18-06-2019
Abstract: Orientation: Over the past two decades, since the advent of democracy in South Africa, the country has undergone transformation in virtually all sectors of society. Education is no exception, with higher education institutions (HEIs) also experiencing change. The transformation of HEIs has brought about many new challenges, demands and stresses that may hinder the work performance of academics.Research purpose: This study seeks to determine the ‘hindrance demands’ unique to the South African context by developing and validating the Higher Education Hindrance Demands Scale (HEHDS). This scale includes a set of demands placed on academics’ experiences in this context.Research approach, design and method: Data were collected from 184 academic staff members from HEIs based on a quantitative research design using a cross-sectional survey. Data were analysed through exploratory factor analysis (EFA), while the reliability of the scale was obtained through Cronbach’s coefficient alpha.Main findings: The results produced, as anticipated, a six-factor model consisting of: (1) workload, (2) higher education unrest, (3) change management, (4) decolonisation, (5) online teaching and learning and (6) psychological safety. The findings indicated excellent reliability, ranging between 0.74 and 0.90.Practical and managerial implications: Taking into consideration the context in which HEIs operate in South Africa, it is noteworthy that the recommendations in this article will assist in identifying the hindrance demands placed on academic staff. Researchers in the field are therefore called to validate the instrument developed through the use of confirmatory factor analysis.Contributions or value-add: This study adds to the limited research on hindrance demands placed on staff in HEIs.
Publisher: Wiley
Date: 26-07-2017
Abstract: Niche conservatism, i.e. the retention of a species' fundamental niche through evolutionary time, is cornerstone for biological invasion assessments. The fact that species tend to maintain their original climate niche allows predictive maps of invasion risk to anticipate potential invadable areas. Unravelling the mechanisms driving niche shifts can shed light on the management of invasive species. Here, we assessed niche shifts in one of the world's worst invasive species: the wild boar Sus scrofa. We also predicted potential invadable areas based on an ensemble of three ecological niche modelling methods, and evaluated the performance of models calibrated with native vs. pooled (native plus invaded) species records. By disentangling the drivers of change on the exotic wild boar population's niches, we found strong evidence for niche conservatism during biological invasion. Ecological niche models calibrated with both native and pooled range records predicted convergent areas. Also, observed niche shifts are mostly explained by niche unfilling, i.e. there are unoccupied areas in the exotic range where climate is analogous to the native range. Niche unfilling is expected as result of recent colonization and ongoing dispersal, and was potentially stronger for the Neotropics, where a recent wave of introductions for pig-farming and game-hunting has led to high wild boar population growth rates. The invasive potential of wild boar in the Neotropics is probably higher than in other regions, which has profound management implications if we are to prevent their invasion into species-rich areas, such as Amazonia, coupled with expansion of African swine fever and possibly great economic losses. Although the originally Eurasian-wide distribution suggests a pre-adaptation to a wide array of climates, the wild boar world-wide invasion does not exhibit evidence of niche evolution. The invasive potential of the wild boar therefore probably lies on the reproductive, dietary and morphological characteristics of this species, coupled with behavioural thermoregulation.
No related grants have been discovered for Professor Nelesh Dhanpat.