title: Natural and Experimental Admixture of Invasive Blowflies in New Zealand and Australia

authors: Croft, Lillian

abstract: Across the globe, native species are being outcompeted and often reach extinction due to introduced species becoming invasive. Previously confined to their native areas due to geographical, ecological, or environmental barriers that have prevented them from expanding, human impacts have resulted in a significant increase in the number of introduced species. Such species become invasive when they begin to expand their range demographically and typically cause negative impacts in the new environment. There is no current model that allows us to predict and prevent future biological invasions, though next generation sequencing, population genomics analysis, and experimental laboratory manipulations are helping to fill critical gaps in our understanding of the invasion process. 
My first analysis (Chapter 2) explored the ability of population genetics analyses of single nucleotide polymorphism (SNP) data to identify hybridisation levels and the rate of admixture occurring in wild populations of Calliphora hilli and Calliphora stygia – two invasive blowflies found in New Zealand and originally from Australia. I analysed samples from various locations and found patterns of population genetic connectivity and structure that supported Australia as the source of the New Zealand invasion for both species. This research provided highly valuable new insights into the population structure of these two species, with hybridisation and gene flow playing a key role in their respective biological invasions. 
My second analysis (Chapter 3) first explored the population structure of the highly invasive blowfly species, Callipohra vicina, using SNP data to analyse population genomic patterns, such as genetic diversity and admixture. Following this, low genetic diversity colonies were generated from isofemale lines to simulate an invasive population that had undergone a genetic bottleneck. These low diversity lines were compared to relatively high diversity lines for a number of traits, including fecundity, body size, developmental rate, and lifespan to determine the effects of genetic diversity on population fitness. We found genetic differentiation between North and South Island New Zealand populations in the wild, while high diversity lines outcompeted low diversity lines for all measured traits in the laboratory. These results demonstrated the importance of genetic bottlenecks on invasion scenarios and suggested interesting new ideas for follow-up research.
Predicting and preventing future invasions is a significant current gap in invasion biology. Population genomic and ecological assays can together help to fill this gap to help us identify the mechanisms underlying invasive success.

text: Natural and Experimental Admixture of Invasive Blowflies in New Zealand and Australia Across the globe, native species are being outcompeted and often reach extinction due to introduced species becoming invasive. Previously confined to their native areas due to geographical, ecological, or environmental barriers that have prevented them from expanding, human impacts have resulted in a significant increase in the number of introduced species. Such species become invasive when they begin to expand their range demographically and typically cause negative impacts in the new environment. There is no current model that allows us to predict and prevent future biological invasions, though next generation sequencing, population genomics analysis, and experimental laboratory manipulations are helping to fill critical gaps in our understanding of the invasion process. 
My first analysis (Chapter 2) explored the ability of population genetics analyses of single nucleotide polymorphism (SNP) data to identify hybridisation levels and the rate of admixture occurring in wild populations of Calliphora hilli and Calliphora stygia – two invasive blowflies found in New Zealand and originally from Australia. I analysed samples from various locations and found patterns of population genetic connectivity and structure that supported Australia as the source of the New Zealand invasion for both species. This research provided highly valuable new insights into the population structure of these two species, with hybridisation and gene flow playing a key role in their respective biological invasions. 
My second analysis (Chapter 3) first explored the population structure of the highly invasive blowfly species, Callipohra vicina, using SNP data to analyse population genomic patterns, such as genetic diversity and admixture. Following this, low genetic diversity colonies were generated from isofemale lines to simulate an invasive population that had undergone a genetic bottleneck. These low diversity lines were compared to relatively high diversity lines for a number of traits, including fecundity, body size, developmental rate, and lifespan to determine the effects of genetic diversity on population fitness. We found genetic differentiation between North and South Island New Zealand populations in the wild, while high diversity lines outcompeted low diversity lines for all measured traits in the laboratory. These results demonstrated the importance of genetic bottlenecks on invasion scenarios and suggested interesting new ideas for follow-up research.
Predicting and preventing future invasions is a significant current gap in invasion biology. Population genomic and ecological assays can together help to fill this gap to help us identify the mechanisms underlying invasive success.

year: 2024

title: The 'Jackson effect': The late 1990s to 2005

authors: Lealand, Geoff

abstract: This chapter describes Jackson's journey from New Zealand cult director to global film maker and examines what might be called the 'Jackson Effect': his singular influence on the state of New Zealand film making in the wake of the LOTR trilogy. While his global success has not been insignificant in terms of his own career, it has also directly affected several elements of the New Zealand film industry. These include the development of New Zealand as an investment focus for global film making; the development of a New Zealand-based production infrastructure to service both offshore and local film; and a measure of job creation and work stability in the industry. Jackson's success has also helped stimulate the growth of destination tourism and has revised our understanding of what a 'New Zealand film' might be in the early twenty-first century.

text: The 'Jackson effect': The late 1990s to 2005 This chapter describes Jackson's journey from New Zealand cult director to global film maker and examines what might be called the 'Jackson Effect': his singular influence on the state of New Zealand film making in the wake of the LOTR trilogy. While his global success has not been insignificant in terms of his own career, it has also directly affected several elements of the New Zealand film industry. These include the development of New Zealand as an investment focus for global film making; the development of a New Zealand-based production infrastructure to service both offshore and local film; and a measure of job creation and work stability in the industry. Jackson's success has also helped stimulate the growth of destination tourism and has revised our understanding of what a 'New Zealand film' might be in the early twenty-first century.

year: 2011

title: Personality and Representation in Environmental Law

authors: Daya-Winterbottom, Trevor

abstract: Jorge Vinuales from the University of Cambridge observed in his working paper on “Law and the Anthropocene” that law is founded on a series of core concepts, such as, “legal personality, representation, obligation, debt, causality or damage” (CEENRG Working Papers 2016- 4, page 49). This led him to note that a “significant problem” faced by environmental law is how to flesh out these core concepts in relation to the protection of the environment (page 53). For example, should we regard natural resources (e.g. rivers or mountains) as “subjects” of environmental law with their “own interests and capacity to act (through representation)”, or merely as the “objects” of environmental law – to be protected either “directly” as specific natural resources, or “indirectly” via the protection of the environment generally (page 53). This article interrogates these perspectives by reference to recent New Zealand developments.

text: Personality and Representation in Environmental Law Jorge Vinuales from the University of Cambridge observed in his working paper on “Law and the Anthropocene” that law is founded on a series of core concepts, such as, “legal personality, representation, obligation, debt, causality or damage” (CEENRG Working Papers 2016- 4, page 49). This led him to note that a “significant problem” faced by environmental law is how to flesh out these core concepts in relation to the protection of the environment (page 53). For example, should we regard natural resources (e.g. rivers or mountains) as “subjects” of environmental law with their “own interests and capacity to act (through representation)”, or merely as the “objects” of environmental law – to be protected either “directly” as specific natural resources, or “indirectly” via the protection of the environment generally (page 53). This article interrogates these perspectives by reference to recent New Zealand developments.

year: 2018-02-06