title: Environmental context determines pollution impacts on ecosystem functioning

authors: Burdon, Francis J.

abstract: Global change assessments have typically ignored synthetic chemical pollution, despite the rapid increase of pharmaceuticals, pesticides and industrial chemicals in the environment. Part of the problem reflects the multifarious origins of these micropollutants, which can derive from urban and agricultural sources. Understanding how micropollutants harm ecosystems is a major scientific challenge due to asymmetries of stress across trophic levels and ecological surprises generated by multiple drivers interacting in human-impacted landscapes. We used field assays above and below municipal wastewater treatment plants (WWTPs) in 60 sampling locations across 20 Swiss streams to test how micropollutants and nutrients originating from WWTPs affect two trophic levels (microbes and detritivores) and their role in leaf litter processing. Wastewater impacts were asymmetric across trophic levels, with the detritivore contribution declining relative to microbial-driven decomposition. The strength of negative impacts were context dependent, peaking at sites with the highest upstream abundances of detritivorous invertebrates. Diffuse pollution from intensive agriculture and wastewater-born micropollutants contributed to reduced litter processing rates, including indirect effects apparently mediated through negative influences of insecticides on detritivores. Asymmetries in stress responses across trophic levels can introduce quantitative changes in consumer–resource dynamics and leaf litter processing. This means functional redundancies at different trophic levels are insufficient to compensate for biodiversity losses, causing environmental stressors such as chemical pollutants to have pervasive ecosystem-level impacts.

text: Environmental context determines pollution impacts on ecosystem functioning Global change assessments have typically ignored synthetic chemical pollution, despite the rapid increase of pharmaceuticals, pesticides and industrial chemicals in the environment. Part of the problem reflects the multifarious origins of these micropollutants, which can derive from urban and agricultural sources. Understanding how micropollutants harm ecosystems is a major scientific challenge due to asymmetries of stress across trophic levels and ecological surprises generated by multiple drivers interacting in human-impacted landscapes. We used field assays above and below municipal wastewater treatment plants (WWTPs) in 60 sampling locations across 20 Swiss streams to test how micropollutants and nutrients originating from WWTPs affect two trophic levels (microbes and detritivores) and their role in leaf litter processing. Wastewater impacts were asymmetric across trophic levels, with the detritivore contribution declining relative to microbial-driven decomposition. The strength of negative impacts were context dependent, peaking at sites with the highest upstream abundances of detritivorous invertebrates. Diffuse pollution from intensive agriculture and wastewater-born micropollutants contributed to reduced litter processing rates, including indirect effects apparently mediated through negative influences of insecticides on detritivores. Asymmetries in stress responses across trophic levels can introduce quantitative changes in consumer–resource dynamics and leaf litter processing. This means functional redundancies at different trophic levels are insufficient to compensate for biodiversity losses, causing environmental stressors such as chemical pollutants to have pervasive ecosystem-level impacts.

year: 2022

title: Cheese Machines and Cellos:  Technical Craftsmen and Craft Technicians

authors: Wanigasekera, Gwenda Dorothy

subjects: Ethnography

abstract: The study is based on a period of ethnographic research among approximately thirty tradesmen, apprentices, supervisors and related personnel at a medium-sized precision engineering company in Hamilton, New Zealand. The company specialises in high quality niche products and machinery for the dairy, aviation and medical technology industries. Its work involves a wide variety of engineering crafts and practices. 

My aim was to better understand the work that was done there, the elements of skilled and expert practice involved in it; how these skills were learned and from whom, and what they meant to those who held them. I wanted to find out which people and what conditions and environments best enabled the acquisition of skills and a good learning experience. By way of comparison to this main group, I interviewed a smaller number of craftspeople in the wider community: a fine furniture maker, a printmaker, a ceramicist and two luthiers, all of whom worked independently. 

This ethnography is located within a wider literature on apprenticeship, skill and education, and about what it means to be a “maker of things” (e.g. Beeby 1992; Biesta 2006; De Munck, Kaplan and Soly 2007; Dormer 1994, 1997; Keep 2007, 2009; Sennett 2008). I also draw on ethnographic discussions by other scholars who have described skilled practices and ways of learning in diverse social and cultural contexts (e.g. Coy 1989; Crawford 2009; Eraut 2001, 2002; Keller and Keller 1996; Lave 1988, 2011; Marchand 2003, 2010).

My ethnographic data provides a rich description of a contemporary industrial workplace where learning involves both practical and theoretical knowledge and creative ability. The findings demonstrate that successful learning on the shop floor (and in the other examples given) is the result of a complex amalgam of disparate elements. The learning and teaching in these workplaces are sometimes structured and sometimes serendipitous. They are embedded in and arise from the processes of creativity, analysis, manufacture and reflection. They involve not only what takes place at the worksites but also the qualities and dispositions and histories of learning, both formal and informal, that the participants bring to their work. 

The development of skill and the acquisition of knowledge are shown to be complex and deeply personal and individual phenomena that are best nurtured in environments rich in materials, opportunity and experience, and in cooperation with interested, capable and expert “others”. This complexity is not easily represented in or catered for by current forms of educational assessment in New Zealand. 

A further and largely unexpected dimension of the study was my growing awareness of my own apprenticeship as a practitioner of ethnography, including my location as a participant observer in the actual field of study. This experience invariably led me to reflect further on the processes of apprenticeship, education and learning.

text: Cheese Machines and Cellos:  Technical Craftsmen and Craft Technicians The study is based on a period of ethnographic research among approximately thirty tradesmen, apprentices, supervisors and related personnel at a medium-sized precision engineering company in Hamilton, New Zealand. The company specialises in high quality niche products and machinery for the dairy, aviation and medical technology industries. Its work involves a wide variety of engineering crafts and practices. 

My aim was to better understand the work that was done there, the elements of skilled and expert practice involved in it; how these skills were learned and from whom, and what they meant to those who held them. I wanted to find out which people and what conditions and environments best enabled the acquisition of skills and a good learning experience. By way of comparison to this main group, I interviewed a smaller number of craftspeople in the wider community: a fine furniture maker, a printmaker, a ceramicist and two luthiers, all of whom worked independently. 

This ethnography is located within a wider literature on apprenticeship, skill and education, and about what it means to be a “maker of things” (e.g. Beeby 1992; Biesta 2006; De Munck, Kaplan and Soly 2007; Dormer 1994, 1997; Keep 2007, 2009; Sennett 2008). I also draw on ethnographic discussions by other scholars who have described skilled practices and ways of learning in diverse social and cultural contexts (e.g. Coy 1989; Crawford 2009; Eraut 2001, 2002; Keller and Keller 1996; Lave 1988, 2011; Marchand 2003, 2010).

My ethnographic data provides a rich description of a contemporary industrial workplace where learning involves both practical and theoretical knowledge and creative ability. The findings demonstrate that successful learning on the shop floor (and in the other examples given) is the result of a complex amalgam of disparate elements. The learning and teaching in these workplaces are sometimes structured and sometimes serendipitous. They are embedded in and arise from the processes of creativity, analysis, manufacture and reflection. They involve not only what takes place at the worksites but also the qualities and dispositions and histories of learning, both formal and informal, that the participants bring to their work. 

The development of skill and the acquisition of knowledge are shown to be complex and deeply personal and individual phenomena that are best nurtured in environments rich in materials, opportunity and experience, and in cooperation with interested, capable and expert “others”. This complexity is not easily represented in or catered for by current forms of educational assessment in New Zealand. 

A further and largely unexpected dimension of the study was my growing awareness of my own apprenticeship as a practitioner of ethnography, including my location as a participant observer in the actual field of study. This experience invariably led me to reflect further on the processes of apprenticeship, education and learning.

year: 2013

title: Ethnic disparities in breast cancer survival in New Zealand: which factors contribute?

authors: Tin Tin, Sandar

subjects: Breast cancer

abstract: Background: New Zealand has major ethnic disparities in breast cancer survival with Maori (indigenous people) and Pacific women (immigrants or descended from immigrants from Pacific Islands) faring much worse than other ethnic groups. This paper identified underlying factors and assessed their relative contribution to this risk differential. 
Methods: This study involved all women who were diagnosed with primary invasive breast cancer in two health regions, covering about 40% of the national population, between January 2000 and June 2014. Maori and Pacific patients were compared with other ethnic groups in terms of demographics, mode of diagnosis, disease factors and treatment factors. Cox regression modelling was performed with stepwise adjustments, and hazards of excess mortality from breast cancer for Maori and Pacific patients were assessed. 
Results: Of the 13,657 patients who were included in this analysis, 1281 (9.4%) were Maori, and 897 (6.6%) were Pacific women. Compared to other ethnic groups, they were younger, more likely to reside in deprived neighbourhoods and to have co-morbidities, and less likely to be diagnosed through screening and with early stage cancer, to be treated in a private care facility, to receive timely cancer treatment, and to receive breast conserving surgery. They had a higher risk of excess mortality from breast cancer (age and year of diagnosis adjusted hazard ratio: 1.76; 95% CI: 1.51-2.04 for Maori and 1.97; 95% CI: 1.67-2.32 for Pacific women), of which 75% and 99% respectively were explained by baseline differences. The most important contributor was late stage at diagnosis. Other contributors included neighbourhood deprivation, mode of diagnosis, type of health care facility where primary cancer treatment was undertaken and type of loco-regional therapy. 
Conclusions: Late diagnosis, deprivation and differential access to and quality of cancer care services were the key contributors to ethnic disparities in breast cancer survival in New Zealand. Our findings underscore the need for a greater equity focus along the breast cancer care pathway, with an emphasis on improving access to early diagnosis for Maori and Pacific women.

text: Ethnic disparities in breast cancer survival in New Zealand: which factors contribute? Background: New Zealand has major ethnic disparities in breast cancer survival with Maori (indigenous people) and Pacific women (immigrants or descended from immigrants from Pacific Islands) faring much worse than other ethnic groups. This paper identified underlying factors and assessed their relative contribution to this risk differential. 
Methods: This study involved all women who were diagnosed with primary invasive breast cancer in two health regions, covering about 40% of the national population, between January 2000 and June 2014. Maori and Pacific patients were compared with other ethnic groups in terms of demographics, mode of diagnosis, disease factors and treatment factors. Cox regression modelling was performed with stepwise adjustments, and hazards of excess mortality from breast cancer for Maori and Pacific patients were assessed. 
Results: Of the 13,657 patients who were included in this analysis, 1281 (9.4%) were Maori, and 897 (6.6%) were Pacific women. Compared to other ethnic groups, they were younger, more likely to reside in deprived neighbourhoods and to have co-morbidities, and less likely to be diagnosed through screening and with early stage cancer, to be treated in a private care facility, to receive timely cancer treatment, and to receive breast conserving surgery. They had a higher risk of excess mortality from breast cancer (age and year of diagnosis adjusted hazard ratio: 1.76; 95% CI: 1.51-2.04 for Maori and 1.97; 95% CI: 1.67-2.32 for Pacific women), of which 75% and 99% respectively were explained by baseline differences. The most important contributor was late stage at diagnosis. Other contributors included neighbourhood deprivation, mode of diagnosis, type of health care facility where primary cancer treatment was undertaken and type of loco-regional therapy. 
Conclusions: Late diagnosis, deprivation and differential access to and quality of cancer care services were the key contributors to ethnic disparities in breast cancer survival in New Zealand. Our findings underscore the need for a greater equity focus along the breast cancer care pathway, with an emphasis on improving access to early diagnosis for Maori and Pacific women.

year: 2018