ResearchSpace
→
Browsing by Author

Browsing by Author "Van Deventer, Heidi"

Now showing items 1-20 of 21

Next Page

Assessing leaf spectral properties of Phragmites australis impacted by acid mine drainage

Author: Van Deventer, Heidi ; Cho, Moses A Date: Jul 2014 The decanting of acid mine drainage (AMD) from the Western Basin on the Witwatersrand in late 2010 raised concerns about AMD risks in other gold, coal and copper mining areas of South Africa. Field spectroscopy and the use of vegetation indices ... Read more
Assessing the effects of subtropical forest fragmentation on leaf nitrogen distribution using remote sensing data

Author: Cho, Moses A ; Ramoelo, Abel ; Debba, Pravesh ; Mutanga, O ; Mathieu, Renaud SA ; Van Deventer, Heidi ; Ndlovu, N Date: Oct 2013 Subtropical forest loss resulting from conversion of forest to other land-cover types such as grassland, secondary forest, subsistence crop farms and small forest patches affects leaf nitrogen (N) stocks in the landscape. This study explores ... Read more
Collating data for freshwater biodiversity planning in South Africa

Author: Petersen, C ; Nel, JL ; Smith-Adao, Lindie B ; Maherry, A ; Van Deventer, Heidi ; Van Niekerk, Lara ; Amis, M ; Bhengu, S ; Hardwick, D ; Mack, S ; Mbona, N ; Swartz, E ; Wistebaar, N Date: Mar 2010 The National Freshwater Ecosystem Priority Areas (NFEPA) project builds on the river component of the National Spatial Biodiversity Assessment (NSBA) 2004, and will feed directly into the National Biodiversity Assessment (NBA) 2010. This ... Read more
Determining the wetland-dryland boundary of depressions using littoral gradient analysis of soil edaphic factors

Author: Nondlazi, Basanda X ; Cho, Moses A ; Van Deventer, Heidi ; Sieben, EJ Date: Aug 2021 Depressional wetlands are highly vulnerable to changes in land surface temperature and rainfall but little is known about their responses to future climate change. This study assessed the variation in edaphic factors between wetlands and along ... Read more
Do seasonal profiles of foliar pigments improve species discrimination of evergreen coastal tree species in KwaZulu- Natal, South Africa?

Author: Van Deventer, Heidi ; Cho, Moses A ; Mutanga, O Date: Apr 2013 Studies in the Northern hemisphere have shown the potential of foliar pigment seasonal profiles as a means of improving species discrimination. Remote sensing vegetation indices have been used to optimise absorption features presented by ... Read more
Earth Observation for Biodiversity Assessment (EO-BA)

Author: Cho, Moses A ; Debba, Pravesh ; Mathieu, Renaud SA ; Ramoelo, Abel ; Naidoo, Laven ; Van Deventer, Heidi ; Malahlela, O ; Mathieu, Renaud SA Date: Oct 2012 The Earth Observation for Biodiversity Assessment (EO-BA) programme is designed to enhance biodiversity assessment and conservation through the application of earth observation data, with particular focus on the African continent. Read more
Estimating above ground biomass as an indicator of carbon storage in vegetated wetlands of the grassland biome of South Africa

Author: Naidoo, Laven ; Van Deventer, Heidi ; Ramoelo, Abel ; Mathieu, Renaud ; Nondlazi, Basanda ; Gangat, R Date: Jun 2019 Wetlands store higher carbon content relative to other terrestrial ecosystems, despite the small extent they occupy. The increase in temperature and changes in rainfall pattern may negatively affect their extent and condition, and thus the ... Read more
Forty years of remote sensing mapping and monitoring of freshwater ecosystems in South Africa

Author: Van Deventer, Heidi Date: Oct 2021 The first space-borne satellite was launched nearly fifty years ago in 1972, initiating global monitoring of freshwater ecosystems. Space-borne images have contributed to forty years of mapping and monitoring of wetlands in South Africa, and ... Read more
Generating alternative alignments in terrain suitability studies for environmental impact assessments of linear developments

Author: Van Deventer, Heidi Date: Aug 2010 The construction of linear developments, such as roads, railways, pipelines and power lines, in South Africa requires a number of alternatives to be considered prior to the submission of a proposed development for an Environmental Impact ... Read more
Identifying the best season for mapping evergreen swamp and mangrove species using leaf-level spectra in an estuarine system in KwaZulu-Natal, South Africa

Author: Van Deventer, Heidi ; Cho, Moses A ; Mutanga, O ; Naidoo, Laven ; Dudeni-Tlhone, N Date: Oct 2014 Swamp and mangrove forests are some of the most threatened forest types in the world. In Africa, these forests are essential in providing food, construction material and medicine to people. These forest types have not sufficiently been mapped ... Read more
Incorporating free-flowing rivers into global biodiversity targets: Prioritization and targeted interventions to maintain ecological integrity

Author: Petersen, CR ; Van Deventer, Heidi ; Smith-Adao, Lindie B ; Nel, JL Date: Dec 2022 Free-flowing rivers (FFRs) are important surrogates for freshwater biodiversity as there are increasingly fewer rivers that reflect intact habitat and species diversity from source to sea. The status and changes in the ecological condition ... Read more
Institutionalising a GSDI at the CSIR

Author: Van Deventer, Heidi Date: Apr 2011 Institutionalising a Geospatial Data Infrastructure (GSDI) was a major watershed for research data management at the Council for Scientific and Industrial Research (CSIR). For the first time in the CSIR's history, the Information and ... Read more
Ixhaphozi eMaputaland coastal plain

Author: Van Deventer, Heidi ; Apleni, Philani Date: Jun 2021 This poster is related to the WRC 427 project and consists of two A0 posters. The first page shows the knowledge of wetlands we currently have, recognising that there are different wetland types. We are concerned about the degradation and ... Read more
National Biodiversity Assessment – Testing the integrity of our freshwater ecosystems

Author: Van Deventer, Heidi ; Van Niekerk, Lara ; Smith-Adao, Lindie B ; Poole, CJ ; Nel, J ; Petersen, C ; Collins, N Date: Aug 2016 The current, nationwide drought has not only underlined the importance of water to South Africans, it has also emphasised the need to protect our freshwater ecosystems. The Third National Biodiversity Assessment – to be completed in 2018 – ... Read more
National Wetland Map 5: An improved spatial extent and representation of inland aquatic and estuarine ecosystems in South Africa

Author: Van Deventer, Heidi ; Van Niekerk, Lara ; Adams, J ; Dinala, MK ; Gangat, R ; Lamberth, SJ ; Lotter, M ; Mbona, N ; MacKay, F ; Nel, JL ; Ramjukadh, CL ; Skowno, A ; Weerts, Steven P Date: Jan 2020 The improved representation of freshwater and estuarine ecosystems and associated data was a key component of the 2018 National Biodiversity Assessment, and is an essential step in enhancing defensible land use planning and decision making. ... Read more
Potential to monitor plant stress using remote sensing tools

Author: Ramoelo, Abel ; Dzikiti, Sebinasi ; Van Deventer, Heidi ; Maherry, A ; Cho, Moses A ; Gush, Mark B Date: Jan 2014 The growing energy crisis has necessitated the expansion of thermal power stations to meet South Africa's electricity needs. Possessing vast amounts of coal deposits, the Waterberg region of the Limpopo Province is set to undergo rapid ... Read more
Relevance of new multispectral imagery for assessing tropical forest disturbance: RapidEye and WorldView-2

Author: Cho, Moses A ; Ramoelo, Abel ; Mutanga, O ; Van Deventer, Heidi ; Debba, Pravesh ; Mathieu, Renaud SA Date: Nov 2012 The aims of this study were to assess utility of RapidEye imagery for predicting leaf nitrogen concentration and evaluate the effects of forest fragmentation on leaf nitrogen distribution in the Dukuduku forest, KwaZulu Natal, South Africa. ... Read more
Using multi-spectral sensors for vegetation mapping

Author: Van Deventer, Heidi ; Cho, Moses A ; Lück-Vogel, Melanie ; Van Niekerk, Lara Date: Jul 2016 Wetland and estuarine vegetation is often difficult to detect and separate from adjacent land covers with multispectral sensors for a number of reasons. The spatial resolution of space-borne sensors is often insufficient for these features ... Read more
Using remote sensing for tree species discrimination in the narrow coastal forests of KwaZulu-Natal, South Africa

Author: Van Deventer, Heidi ; Cho, Moses A ; Mutanga, O Date: Sep 2015 Indigenous forests of South Africa occur in one of the smallest biomes covering less than 0.5% of the total surface area of the country. Regardless of the small and narrow extent of these forests, they offer a range of ecosystem services, ... Read more
Using the landform tool to calculate landforms for hydrogeomorphic wetland classification at a country-wide scale

Author: Van Deventer, Heidi ; Nel, J ; Maherry, A ; Mbona, N Date: Nov 2014 Hydrogeomorphic approaches to wetland classification use landform classes to distinguish wetland functionality at a regional scale. Space-borne radar technology enabled faster regional surveying of surface elevations to digital elevation ... Read more

Now showing items 1-20 of 21

Next Page

Browse

All of ResearchSpace

Quick Links

Legislation and compliance

General Enquiries

Tel: + 27 12 841 2911
Email: callcentre@csir.co.za

Physical Address
Meiring Naudé Road
Brummeria
Pretoria
South Africa

Postal Address
PO Box 395
Pretoria 0001
South Africa

Social Connect

Copyright © CSIR 2017. All Rights Reserved

Resources on this site are free to download and reuse according to associated licensing provision. Please read the terms and conditions of usage of each resource.