title: Academic spotlight: Reuben Steff talks big power politics

authors: Steff, Reuben

abstract: Dr Reuben Steff bemoans the absence of robust debate in New Zealand on foreign policy issues and the lack of investment in local research and strategic supply chains. He talks exclusively to Line of Defence.

text: Academic spotlight: Reuben Steff talks big power politics Dr Reuben Steff bemoans the absence of robust debate in New Zealand on foreign policy issues and the lack of investment in local research and strategic supply chains. He talks exclusively to Line of Defence.

year: 2020

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: Ngā waka o tawhiti

authors: Tuaupiki, Jackie Whetumarama

abstract: Mai anō ngā terenga waka a te Māori, ko ōna kōrero tuku iho i whakatauira tuatahingia e ngā atua tonu, taka mai ki te iwi tāngata o Te Moana-nui-a-Kiwa. Tā tēnei tuhinga, he wānanga i te mana o te kōrero tuku iho e haupū nei ngā pūrākau terenga waka onamata i takoto ai te tūāpapa mātauranga whakatere mō ngā waka tūpuna i heke iho i Hawaiki ki Aotearoa. Nō reira, ka riariakina ngā pūtoi whakatauiratanga waka a te Māori i ōna atua me ōna tūpuna me te ahunga mai o ana terenga mātāmua, ka aromātai hoki i te takiwā o ngā tau i tauria ai e ōna takere Te Ika-a-Māui e takoto nei.

text: Ngā waka o tawhiti Mai anō ngā terenga waka a te Māori, ko ōna kōrero tuku iho i whakatauira tuatahingia e ngā atua tonu, taka mai ki te iwi tāngata o Te Moana-nui-a-Kiwa. Tā tēnei tuhinga, he wānanga i te mana o te kōrero tuku iho e haupū nei ngā pūrākau terenga waka onamata i takoto ai te tūāpapa mātauranga whakatere mō ngā waka tūpuna i heke iho i Hawaiki ki Aotearoa. Nō reira, ka riariakina ngā pūtoi whakatauiratanga waka a te Māori i ōna atua me ōna tūpuna me te ahunga mai o ana terenga mātāmua, ka aromātai hoki i te takiwā o ngā tau i tauria ai e ōna takere Te Ika-a-Māui e takoto nei.

year: 2017