Biosecure citizenship: politicising symbiotic associations and the construction of biological threat

Biosecurity politics in New Zealand is implicated in the constitution of a new dimension of citizenship, a biosecure citizenship. This form is distinct in that the political determinants of citizenship do not fully rest on the individual body, but on the body’s connections to other entities, the inter- and intra-active symbiotic condition of human-non-human ‘living together’. Through its constitutive role in enabling the ‘dangerous’ mobility of pathogens, viruses and invasive species, symbiotic individuality has become politicised as a matter for state determination and control. Contemporary articulations of biosecure citizenship emphasise a variety of contractual and non-contractual responsibilities, which augment the national coordinates of citizenship, reconstitute symbiotic individuality, and justify the state penetration of the private sphere. Drawing on biosecurity legislation, public education campaigns and research with community weed removal projects, I chart the reinforcement and practice of this biosecure citizenship. I argue that there is an urgent need to democratise decisionmaking about the construction of biological threat, about where and how to make cuts in our symbiotic associations with different species, and between species and spaces. By articulating biosecure citizenship not only as a discourse of ecological responsibility but of rights, biosecurity could be reinvigorated as ‘bios-security’, the inclusive politics of continually questioning the ecological good life

Catchment land use and trophic state impacts on phytoplankton composition: a case study from the Rotorua lakes’ district, New Zealand

Trophic state of lakes has been related to catchment land use, but direct links between phytoplankton taxa and land use are limited. Phytoplankton composition, represented by relative cell abundance of phyla, was measured over a period of 4 years in 11 lakes in the Rotorua region, New Zealand. The lakes differed in morphometry, trophic state and land use (as percentage catchment area). We tested whether relative proportion of land uses, indirectly representing relative nutrient loading, was the overarching driver of phytoplankton composition. Trophic state was correlated negatively with native forest and positively with pasture and urban area. Cyanoprokaryota were correlated negatively with native forest and positively with pasture and trophic state, Chlorophyta were correlated positively with native forest and urban land use and negatively with pasture and trophic state, and Bacillariophyta were positively correlated with dissolved reactive silica to dissolved inorganic nitrogen (Si:DIN) and Si to dissolved reactive phosphorus (Si:DRP) ratios. Lakes with higher nutrient loads had higher trophic state and Cyanoprokaryota dominance. Chlorophyta were negatively correlated with Cyanoprokaryota and Bacillariophyta, suggesting competition amongst these groups. Our results apply to lakes potentially subject to changes in catchment land use, which may have implications for trophic state, phytoplankton composition and Cyanoprokaryota blooms