title: Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica

authors: Pannewitz, Stefan

subjects: chlorophyll a fluorescence

abstract: Xanthoria mawsonii C. W. Dodge was found to perform well physiologically in a variety of habitats at high latitudes in continental Antarctica. The net photosynthetic rate of 7•5 μ mol CO2 kg−1 s−1 is exceptionally high for Antarctic lichens. Field and laboratory measurements proved the photosynthetic apparatus to be highly adapted to strong irradiance. The cold resistance of the photosystem II reaction centres is higher than the photosynthetic CO2 fixation process. Optimum temperature for net photosynthesis was c. 10°C. The lichen grows along water channels where it is frequently inundated and hydrated to maximum water content, although net photosynthesis is strongly depressed by super saturation. In these habitats the lichen is photosynthetically active for long periods of time. Xanthoria mawsonii also grows at sites where it depends entirely on the early spring snow melt and occasional snow fall for moisture. It has an exceptionally short reactivation phase and is able to utilize snow immediately. Recovery of activity by absorbing water vapour from air, though practically possible, seems to be of ecological importance only under snow at subzero temperatures.

text: Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica Xanthoria mawsonii C. W. Dodge was found to perform well physiologically in a variety of habitats at high latitudes in continental Antarctica. The net photosynthetic rate of 7•5 μ mol CO2 kg−1 s−1 is exceptionally high for Antarctic lichens. Field and laboratory measurements proved the photosynthetic apparatus to be highly adapted to strong irradiance. The cold resistance of the photosystem II reaction centres is higher than the photosynthetic CO2 fixation process. Optimum temperature for net photosynthesis was c. 10°C. The lichen grows along water channels where it is frequently inundated and hydrated to maximum water content, although net photosynthesis is strongly depressed by super saturation. In these habitats the lichen is photosynthetically active for long periods of time. Xanthoria mawsonii also grows at sites where it depends entirely on the early spring snow melt and occasional snow fall for moisture. It has an exceptionally short reactivation phase and is able to utilize snow immediately. Recovery of activity by absorbing water vapour from air, though practically possible, seems to be of ecological importance only under snow at subzero temperatures.

year: 2006

title: Paternalism and racism in pacific labour migration: A critical discourse analysis of the Recognised Seasonal Employer scheme

authors: Roy, Rituparna

abstract: Neoliberalism and ‘race’ have become fundamental in the operation of migration regimes internationally. This is particularly the case in circular labour mobility schemes that involve the seasonal movement of migrants from the Global South into labour markets in the Global North in deeply racialized ways that are underpinned by neoliberal market rule. This paper explores the institutionalisation of racism in the Recognised Seasonal Employer (RSE) scheme in Aotearoa New Zealand (hereafter, New Zealand), a circular migration programme that has been promoted as a ‘best practice’ ‘global model.’ Using discourse analysis, we identify a strong emphasis on paternalism, managerialism, and racialisation, which shape the character of Pacific-focused labour programmes. Paternalism is expressed in the positioning of New Zealand as leading Pacific countries’ development and governance, and an emphasis on ‘co-development’ underpinned by claims of mutual beneficence. The RSE scheme is then managed through discourses and operational mechanisms that are informed by technocratic managerialism, rendering Pacific migrants able to be controlled through restricted rights and an emphasis on the maintenance of permanent circulation. Lastly, paternalism and managerialism take shape around the racialisation and stratification of RSE migrant labour as ideal workers for seasonal manual labour characterised by low wages, conditions and rights. This critical analysis reveals the deeply embedded coloniality of circular labour mobility schemes like the RSE and suggests the importance of wholesale transformation rather than a refinement of an unjust system.

text: Paternalism and racism in pacific labour migration: A critical discourse analysis of the Recognised Seasonal Employer scheme Neoliberalism and ‘race’ have become fundamental in the operation of migration regimes internationally. This is particularly the case in circular labour mobility schemes that involve the seasonal movement of migrants from the Global South into labour markets in the Global North in deeply racialized ways that are underpinned by neoliberal market rule. This paper explores the institutionalisation of racism in the Recognised Seasonal Employer (RSE) scheme in Aotearoa New Zealand (hereafter, New Zealand), a circular migration programme that has been promoted as a ‘best practice’ ‘global model.’ Using discourse analysis, we identify a strong emphasis on paternalism, managerialism, and racialisation, which shape the character of Pacific-focused labour programmes. Paternalism is expressed in the positioning of New Zealand as leading Pacific countries’ development and governance, and an emphasis on ‘co-development’ underpinned by claims of mutual beneficence. The RSE scheme is then managed through discourses and operational mechanisms that are informed by technocratic managerialism, rendering Pacific migrants able to be controlled through restricted rights and an emphasis on the maintenance of permanent circulation. Lastly, paternalism and managerialism take shape around the racialisation and stratification of RSE migrant labour as ideal workers for seasonal manual labour characterised by low wages, conditions and rights. This critical analysis reveals the deeply embedded coloniality of circular labour mobility schemes like the RSE and suggests the importance of wholesale transformation rather than a refinement of an unjust system.

year: 2025

title: Review of Mareikura-Messengers of Io

authors: Crawford, Terri Ripeka

subjects: Mareikura-Messengers of Io

abstract: Review of Tru Paraha's "Mareikura - Messages of Io", Soundings Theatre, Te Papa Tongarewa, Wellington, 6 June 2008.

text: Review of Mareikura-Messengers of Io Review of Tru Paraha's "Mareikura - Messages of Io", Soundings Theatre, Te Papa Tongarewa, Wellington, 6 June 2008.

year: 2009