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The development of a toxicity database using freshwater macroinvertebrates, and its application to the protection of South African water resources
- Palmer, Carolyn G, Muller, Wilhelmine J, Gordon, Andrew K, Scherman, P-A, Davies-Coleman, H D, Pakhomova, L, De Kock, E
- Authors: Palmer, Carolyn G , Muller, Wilhelmine J , Gordon, Andrew K , Scherman, P-A , Davies-Coleman, H D , Pakhomova, L , De Kock, E
- Date: 2004
- Language: English
- Type: text , Article
- Identifier: vital:7073 , http://hdl.handle.net/10962/d1009528
- Description: There is a growing international trend towards the protection of freshwater resources from pollution by imposing instream guidelines and specified waste-discharge conditions. Current methods for devising freshwater quality guidelines are based on species sensitivity distributions (SSDs) that are used to identify pollutant concentrations, ensuring the protection of a modelled percentage of species (95% protection is a common goal). SSDs are derived from the toxicity test results of as many taxa as possible for each polluting substance. Waste-discharge licences can be for single substances, specified in terms of chemical concentrations, and derived in conjunction with instream guidelines; or for complex mixtures, specified in terms of toxic units. In both cases toxicity test results are the core data used. The emphasis on SSDs calls into question the species constituting the test populations. It is likely that SSDs based in part on the responses of local organisms will achieve superior site-specific ecological protection. Until the early 1990s, there were very few data on the tolerances of South African freshwater organisms. In the intervening decade, the Unilever Centre for Environmental Water Quality at Rhodes University has developed a toxicity database that, to date, records the responses of 21 South African freshwater taxa to 26 single-substance pollutants or mixtures. This is the most comprehensive database of South African toxicity responses available and has been used in the drawing up of methods and guidelines to protect water resources. This paper aims to make these data available and to describe applications of the data using selected case studies.
- Full Text:
- Date Issued: 2004
- Authors: Palmer, Carolyn G , Muller, Wilhelmine J , Gordon, Andrew K , Scherman, P-A , Davies-Coleman, H D , Pakhomova, L , De Kock, E
- Date: 2004
- Language: English
- Type: text , Article
- Identifier: vital:7073 , http://hdl.handle.net/10962/d1009528
- Description: There is a growing international trend towards the protection of freshwater resources from pollution by imposing instream guidelines and specified waste-discharge conditions. Current methods for devising freshwater quality guidelines are based on species sensitivity distributions (SSDs) that are used to identify pollutant concentrations, ensuring the protection of a modelled percentage of species (95% protection is a common goal). SSDs are derived from the toxicity test results of as many taxa as possible for each polluting substance. Waste-discharge licences can be for single substances, specified in terms of chemical concentrations, and derived in conjunction with instream guidelines; or for complex mixtures, specified in terms of toxic units. In both cases toxicity test results are the core data used. The emphasis on SSDs calls into question the species constituting the test populations. It is likely that SSDs based in part on the responses of local organisms will achieve superior site-specific ecological protection. Until the early 1990s, there were very few data on the tolerances of South African freshwater organisms. In the intervening decade, the Unilever Centre for Environmental Water Quality at Rhodes University has developed a toxicity database that, to date, records the responses of 21 South African freshwater taxa to 26 single-substance pollutants or mixtures. This is the most comprehensive database of South African toxicity responses available and has been used in the drawing up of methods and guidelines to protect water resources. This paper aims to make these data available and to describe applications of the data using selected case studies.
- Full Text:
- Date Issued: 2004
Water and transformation in South Africa
- Authors: Palmer, Carolyn G
- Date: 2012
- Language: English
- Type: Text
- Identifier: vital:578 , http://hdl.handle.net/10962/d1009525
- Description: Water and transformation in South Africa: in special memory of Kader Asmal and Francois Junod.
- Full Text:
- Date Issued: 2012
- Authors: Palmer, Carolyn G
- Date: 2012
- Language: English
- Type: Text
- Identifier: vital:578 , http://hdl.handle.net/10962/d1009525
- Description: Water and transformation in South Africa: in special memory of Kader Asmal and Francois Junod.
- Full Text:
- Date Issued: 2012
Using System Dynamics to Explore the Water Supply and Demand Dilemmas of a Small South African Municipality
- Clifford-Holmes, Jai K, Slinger, Jill H, Musango, J K, Brent, A C, Palmer, Carolyn G
- Authors: Clifford-Holmes, Jai K , Slinger, Jill H , Musango, J K , Brent, A C , Palmer, Carolyn G
- Date: 2014-08-15
- Language: English
- Type: Conference paper
- Identifier: vital:7070 , http://hdl.handle.net/10962/d1014840
- Description: This paper explores the challenges faced by small municipalities in providing water services in a developing world context of increasing urban demand. The paper uses a case study of the Sundays River Valley Municipality (SRVM) in South Africa. The municipality faces multiple dilemmas in reconciling its available water supply with growing demand for potable water in the primary urban settlement in the area, in a struggle that is typical of the broad category of South African municipalities to which the SRVM belongs. These dilemmas are explored using a system dynamics model, referred to as the ‘Kirkwood water demand system dynamics model’ (K-DEM). This paper specifically introduces the K-DEM structure,which is aimed at investigating the impacts of households progressively receiving full water and sanitation services; the use of rainwater harvesting as an alternative form of water supply; and the possible effect of a household-level water conservation / water demand management programme. Baseline results are discussed, and areas for future research identified. Paper presented at the 32nd International Conference of the System Dynamics Society, 21-24 July 2014, in Delft, the Netherlands. , Word , Mac OS X 10.8.5 Quartz PDFContext
- Full Text:
- Authors: Clifford-Holmes, Jai K , Slinger, Jill H , Musango, J K , Brent, A C , Palmer, Carolyn G
- Date: 2014-08-15
- Language: English
- Type: Conference paper
- Identifier: vital:7070 , http://hdl.handle.net/10962/d1014840
- Description: This paper explores the challenges faced by small municipalities in providing water services in a developing world context of increasing urban demand. The paper uses a case study of the Sundays River Valley Municipality (SRVM) in South Africa. The municipality faces multiple dilemmas in reconciling its available water supply with growing demand for potable water in the primary urban settlement in the area, in a struggle that is typical of the broad category of South African municipalities to which the SRVM belongs. These dilemmas are explored using a system dynamics model, referred to as the ‘Kirkwood water demand system dynamics model’ (K-DEM). This paper specifically introduces the K-DEM structure,which is aimed at investigating the impacts of households progressively receiving full water and sanitation services; the use of rainwater harvesting as an alternative form of water supply; and the possible effect of a household-level water conservation / water demand management programme. Baseline results are discussed, and areas for future research identified. Paper presented at the 32nd International Conference of the System Dynamics Society, 21-24 July 2014, in Delft, the Netherlands. , Word , Mac OS X 10.8.5 Quartz PDFContext
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The relationship between concurrently measured SASS (South African Scoring System) and turbidity data archived in the South African River Health Programme’s Rivers Database
- Gordon, Andrew K, Griffin, Neil J, Palmer, Carolyn G
- Authors: Gordon, Andrew K , Griffin, Neil J , Palmer, Carolyn G
- Date: 2015
- Language: English
- Type: text , Article
- Identifier: vital:7098 , http://hdl.handle.net/10962/d1015956
- Description: The need for monitoring the biological impacts of instream sediments has long been recognised, yet robust and scientifically defensible tools for doing so are still in the early stages of development because of the difficulties experienced by researchers in characterising the complicated mechanisms of biological effect elicited by sediment particles. Biological monitoring is one such tool, and this paper reports on the initial stages of a study to determine the most applicable approach for measuring the effects of instream sediments on aquatic macroinvertebrates in the South African context. In this first instance, the suitability of the rapid macroinvertebrate biomonitoring tool (the South African Scoring System) was investigated by determining the extent of the correlation between concurrently measured SASS metrics and turbidity data collected for the South African River Health Programme. All three SASS metrics – SASS score, number of taxa (NOT), and average score per taxon (ASPT) – were found to be significantly negatively correlated with turbidity, although variation in the data was high. Turbidity was found to be the major driver of change in ASPT. In contrast, electrical conductivity was the major driver of SASS scores and NOT, with turbidity a close second. When combined, electrical conductivity and turbidity accounted for 80 percent (SASS score) and 75 percent (NOT) of the variation in the regression model. Consequently, SASS metrics are a crude, but reliable, indicator of the negative biological implications of excessive instream sedimentation as measured by turbidity. A number of other potential biomonitoring approaches for detecting the impacts of fine sediment exposure are identified for further investigation: spatial analyses of macroinvertebrate assemblages; and the use of structural and functional metrics.
- Full Text:
- Date Issued: 2015
- Authors: Gordon, Andrew K , Griffin, Neil J , Palmer, Carolyn G
- Date: 2015
- Language: English
- Type: text , Article
- Identifier: vital:7098 , http://hdl.handle.net/10962/d1015956
- Description: The need for monitoring the biological impacts of instream sediments has long been recognised, yet robust and scientifically defensible tools for doing so are still in the early stages of development because of the difficulties experienced by researchers in characterising the complicated mechanisms of biological effect elicited by sediment particles. Biological monitoring is one such tool, and this paper reports on the initial stages of a study to determine the most applicable approach for measuring the effects of instream sediments on aquatic macroinvertebrates in the South African context. In this first instance, the suitability of the rapid macroinvertebrate biomonitoring tool (the South African Scoring System) was investigated by determining the extent of the correlation between concurrently measured SASS metrics and turbidity data collected for the South African River Health Programme. All three SASS metrics – SASS score, number of taxa (NOT), and average score per taxon (ASPT) – were found to be significantly negatively correlated with turbidity, although variation in the data was high. Turbidity was found to be the major driver of change in ASPT. In contrast, electrical conductivity was the major driver of SASS scores and NOT, with turbidity a close second. When combined, electrical conductivity and turbidity accounted for 80 percent (SASS score) and 75 percent (NOT) of the variation in the regression model. Consequently, SASS metrics are a crude, but reliable, indicator of the negative biological implications of excessive instream sedimentation as measured by turbidity. A number of other potential biomonitoring approaches for detecting the impacts of fine sediment exposure are identified for further investigation: spatial analyses of macroinvertebrate assemblages; and the use of structural and functional metrics.
- Full Text:
- Date Issued: 2015
Cultural adaptations of Dance Movement Psychotherapy experiences: from a UK higher education context to working with communities in southern Africa facing water related inequality
- Copteros, Athina, Karkou, Vicky, Palmer, Carolyn G
- Authors: Copteros, Athina , Karkou, Vicky , Palmer, Carolyn G
- Date: 2017
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/141995 , vital:38022 , ISBN 9780199949298 , https://doi.org/10.1093/oxfordhb/9780199949298.001.0001
- Description: Water plays a key role in all our lives and in South Africa epitomizes a space in which political inequalities have played themselves out with devastating consequences. The current ecological crisis demands new ways of engaging with ourselves, each other and nature. This research is an initial exploration on the use of a body-based creative movement approach within a transdisciplinary complex social-ecological systems researcher group. The research objective discussed in this chapter is to develop culturally relevant themes from professional Dance Movement Psychotherapy (DMP) training in the UK for application in a South African water resource management context. Interpretative Phenomenological Analysis was used to identify culturally relevant themes based on the recorded perceptions of the phenomenon of the training while it was taking place. The themes of: Awareness of Power and Difference; Therapeutic Adaptability; Sharing Leadership and Connecting with the Environment were identified. Artistic Inquiry was used to creatively reflect on the themes and add an embodied response to the discussion. The cultural adaptations of DMP can contribute to a more engaged and non-hierarchical collaboration between practitioners and the people and communities they serve, which would facilitate a therapeutic practice that works with both internal, external (and even transcendental) factors.
- Full Text:
- Date Issued: 2017
- Authors: Copteros, Athina , Karkou, Vicky , Palmer, Carolyn G
- Date: 2017
- Language: English
- Type: text , book
- Identifier: http://hdl.handle.net/10962/141995 , vital:38022 , ISBN 9780199949298 , https://doi.org/10.1093/oxfordhb/9780199949298.001.0001
- Description: Water plays a key role in all our lives and in South Africa epitomizes a space in which political inequalities have played themselves out with devastating consequences. The current ecological crisis demands new ways of engaging with ourselves, each other and nature. This research is an initial exploration on the use of a body-based creative movement approach within a transdisciplinary complex social-ecological systems researcher group. The research objective discussed in this chapter is to develop culturally relevant themes from professional Dance Movement Psychotherapy (DMP) training in the UK for application in a South African water resource management context. Interpretative Phenomenological Analysis was used to identify culturally relevant themes based on the recorded perceptions of the phenomenon of the training while it was taking place. The themes of: Awareness of Power and Difference; Therapeutic Adaptability; Sharing Leadership and Connecting with the Environment were identified. Artistic Inquiry was used to creatively reflect on the themes and add an embodied response to the discussion. The cultural adaptations of DMP can contribute to a more engaged and non-hierarchical collaboration between practitioners and the people and communities they serve, which would facilitate a therapeutic practice that works with both internal, external (and even transcendental) factors.
- Full Text:
- Date Issued: 2017
Navigating Multiple Tensions for Engaged Praxis in a Complex Social-Ecological System
- Cockburn, Jessica, Palmer, Carolyn G, Biggs, Harry, Rosenberg, Eureta
- Authors: Cockburn, Jessica , Palmer, Carolyn G , Biggs, Harry , Rosenberg, Eureta
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127886 , vital:36052 , https://doi.org/10.3390/land7040129
- Description: Recently, the 33-year journey of the Southern African Journal of Environmental Education (SAJEE) was the subject of reflection during an Open Access Publishing week convened by Rhodes University Library Services. Two former and current editors-in-chief shared the SAJEE’s story of publishing ‘from the margins into the centre’. In the early 1990s, the Journal was mailed to the Environmental Education Association of Southern Africa (EEASA) membership from the foyer of the Rhodes Education Department (which had the floor space for stuffing and stacking A4 envelopes). In the first decade of this century, the Journal arrived at a symbolic ‘centre’ with digital distribution, first on the EEASA website and then from the Open Access platform provided by African Journals Online (AJOL). The digital move was vital for sustained and increased distribution in a time of shrinking budgets and growing costs. The results, shared with the EEASA Council earlier this year, were nothing short of spectacular: In March 2017, the SAJEE received more than 1 250 article downloads (www.ajol.info/index.php/sajee), and the number of downloads have stayed above 500 each month subsequently (Figure 1). Views and downloads are recorded around the world including,
- Full Text:
- Date Issued: 2018
- Authors: Cockburn, Jessica , Palmer, Carolyn G , Biggs, Harry , Rosenberg, Eureta
- Date: 2018
- Language: English
- Type: text , article
- Identifier: http://hdl.handle.net/10962/127886 , vital:36052 , https://doi.org/10.3390/land7040129
- Description: Recently, the 33-year journey of the Southern African Journal of Environmental Education (SAJEE) was the subject of reflection during an Open Access Publishing week convened by Rhodes University Library Services. Two former and current editors-in-chief shared the SAJEE’s story of publishing ‘from the margins into the centre’. In the early 1990s, the Journal was mailed to the Environmental Education Association of Southern Africa (EEASA) membership from the foyer of the Rhodes Education Department (which had the floor space for stuffing and stacking A4 envelopes). In the first decade of this century, the Journal arrived at a symbolic ‘centre’ with digital distribution, first on the EEASA website and then from the Open Access platform provided by African Journals Online (AJOL). The digital move was vital for sustained and increased distribution in a time of shrinking budgets and growing costs. The results, shared with the EEASA Council earlier this year, were nothing short of spectacular: In March 2017, the SAJEE received more than 1 250 article downloads (www.ajol.info/index.php/sajee), and the number of downloads have stayed above 500 each month subsequently (Figure 1). Views and downloads are recorded around the world including,
- Full Text:
- Date Issued: 2018
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