title: A discontinuous ca. 80 ka record of Late Quaternary environmental change from Lake Omapere, Northland, New Zealand

authors: Newnham, Rewi M.

subjects: Last Glacial

abstract: We present an integrated record of environmental change from Lake Omapere, Northland, New Zealand, based on palaeolimnological analysis of a 7-m-long core and eight adjunct cores spanning part of the last 80 calendar (cal.) ka. The chronology was developed using tephrochronology, palaeomagnetism and radiocarbon dating together with climato- and palyno-stratigraphy. Two of 14 tephra layers in the cores provide markers for correlating the record with other New Zealand climato-stratigraphic sequences, deep-sea cores and the global marine isotope record. Pollen, diatom, palaeomagnetic, sedimentologic and pigment analyses show that Lake Omapere, currently 2 m deep, has had a discontinuous history. Occupying a shallow basin perched partly within old basalt lavas, the initial (alkaline) lake formed towards the end of MIS 5a at ca. 80 cal. ka, presumably because of blockage of local drainage of a swampy alluvial floodplain, inundating peat deposits and forest trees, including kauri (Agathis australis). The lake filled rapidly to a level 1–2 m above that at present. Such filling was probably unrelated to climate but a subsequent phase of variable but generally falling lake levels and increasing dystrophy may have been climatically controlled, commencing during MIS 4 and culminating in periods early in MIS 3 when the lake became swampy or dry. Conditions of non-deposition (or non-preservation) obtained for most of the period after ca. 55 cal. ka (Rotoehu Ash) until formation of the modern lake approximately 600–700 cal. years ago or soon after, as indicated by the presence of Tephra-1, identified in part as Kaharoa Tephra (AD 1314), near the top of the core. The modern lake originated possibly through damming of the western outlet as a consequence of accelerated erosion accompanying earliest Polynesian deforestation, an interpretation supported by Maori oral tradition.
The pollen record indicates that beech Nothofagus (presumably N. truncata) was much more common in Northland during the Last Glacial, and that for this region the relative abundance of Nothofagus vs. Agathis pollen serves as a better indicator of cooler versus warmer intervals during the Quaternary than the ratio of tree to non-tree pollen. However, it seems likely that moisture balance was a more critical factor than temperature in vegetation composition and distribution, particularly during the LGM, and the long periods of hiatus may also be linked to a drier climate than present. Correlation coefficients between the pollen curves confirm that several tree species (Halocarpus bidwillii, H. biformis and Phyllocladus alpinus), previously palynologically concealed within generic taxonomic groups, occurred about two degrees latitude further north and at a much lower altitude than their current limits during cooler or drier phases of the Last Glacial. A temperature depression in Northland of 4 °C at various times during the Last Glacial is inferred from these range expansions. Nevertheless, the persistence of widespread forest cover suggests that the late Pleistocene climate of Northland was less severe than for most of the rest of New Zealand and strengthens the argument for a heightened temperature gradient across northern New Zealand during the Last Glacial.

text: A discontinuous ca. 80 ka record of Late Quaternary environmental change from Lake Omapere, Northland, New Zealand We present an integrated record of environmental change from Lake Omapere, Northland, New Zealand, based on palaeolimnological analysis of a 7-m-long core and eight adjunct cores spanning part of the last 80 calendar (cal.) ka. The chronology was developed using tephrochronology, palaeomagnetism and radiocarbon dating together with climato- and palyno-stratigraphy. Two of 14 tephra layers in the cores provide markers for correlating the record with other New Zealand climato-stratigraphic sequences, deep-sea cores and the global marine isotope record. Pollen, diatom, palaeomagnetic, sedimentologic and pigment analyses show that Lake Omapere, currently 2 m deep, has had a discontinuous history. Occupying a shallow basin perched partly within old basalt lavas, the initial (alkaline) lake formed towards the end of MIS 5a at ca. 80 cal. ka, presumably because of blockage of local drainage of a swampy alluvial floodplain, inundating peat deposits and forest trees, including kauri (Agathis australis). The lake filled rapidly to a level 1–2 m above that at present. Such filling was probably unrelated to climate but a subsequent phase of variable but generally falling lake levels and increasing dystrophy may have been climatically controlled, commencing during MIS 4 and culminating in periods early in MIS 3 when the lake became swampy or dry. Conditions of non-deposition (or non-preservation) obtained for most of the period after ca. 55 cal. ka (Rotoehu Ash) until formation of the modern lake approximately 600–700 cal. years ago or soon after, as indicated by the presence of Tephra-1, identified in part as Kaharoa Tephra (AD 1314), near the top of the core. The modern lake originated possibly through damming of the western outlet as a consequence of accelerated erosion accompanying earliest Polynesian deforestation, an interpretation supported by Maori oral tradition.
The pollen record indicates that beech Nothofagus (presumably N. truncata) was much more common in Northland during the Last Glacial, and that for this region the relative abundance of Nothofagus vs. Agathis pollen serves as a better indicator of cooler versus warmer intervals during the Quaternary than the ratio of tree to non-tree pollen. However, it seems likely that moisture balance was a more critical factor than temperature in vegetation composition and distribution, particularly during the LGM, and the long periods of hiatus may also be linked to a drier climate than present. Correlation coefficients between the pollen curves confirm that several tree species (Halocarpus bidwillii, H. biformis and Phyllocladus alpinus), previously palynologically concealed within generic taxonomic groups, occurred about two degrees latitude further north and at a much lower altitude than their current limits during cooler or drier phases of the Last Glacial. A temperature depression in Northland of 4 °C at various times during the Last Glacial is inferred from these range expansions. Nevertheless, the persistence of widespread forest cover suggests that the late Pleistocene climate of Northland was less severe than for most of the rest of New Zealand and strengthens the argument for a heightened temperature gradient across northern New Zealand during the Last Glacial.

year: 2004

title: 'Thinking-through-Complicity' with Te Iwi o Ngāti Hauiti: Towards a Critical Use of Participatory Video for Research

authors: Kindon, Sara Louise

subjects: human geography

abstract: This thesis explores some of the seductions and dangers of participatory video for research (PVR) involving Indigenous Māori and Pākehā research partners. The project within which PVR was used focused on exploring relationships between place, identity and social cohesion within ‘remote’ rural communities. It involved about 15 members of the Potaka whānau of Te Iwi o Ngāti Hauiti in the central Rangitīkei district of the North Island, Aotearoa New Zealand. A small group of iwi members, myself and an audiovisual specialist and trainer negotiated the project’s focus, process and ethics during 1998. A different group of iwi members were then trained in video production and community research methods later that year and supported to produce their own productions, and carry out video research interviews with other iwi members. The entire process of negotiation, training and collaborative research was filmed for archival and research purposes with everyone’s consent, and several collaborative publications and presentations have been produced since 1999.

The discursive space opened up by Ngāti Hauiti’s engagement with, and use of, video provides an opportunity to attend to the ‘cultural mediations’ that occurred throughout the research partnership and to inquire into the possible ‘empire building effects’ of visual technologies within participatory research more generally. The focus on PVR within a Māori context also prompts questions about the visual’s transformative potential within geographic research, and the implications of working through the use of a visual medium for rethinking disciplinary practices and knowledges, particularly when working cross-culturally. 

In the thesis, I first review the evolution and attendant challenges associated with both the use of participation and video within research contexts. I trace their similar origins in modernist attempts to ‘know’ and ‘empower’ marginalised others, and highlight the ongoing marginalisation of Indigenous perspectives within mainstream debates. I then engage with conceptualisations of complicity and develop an analytical framework that expands on current discursive and ideological discussions to also attend to its material, embodied and spatial dimensions.

Using this framework and a complementary autoethnographic and ‘hyper-self-reflexive’ approach, I track aspects of my own power, complicity and desire within my research practice in the PVR project during the period 1998-2001. This approach involves the development of a particular reading position to focus on critical incidents of my research practice and a means of grappling productively with the polyvalent nature of my audiovisual and other information sources. I discuss these critical incidents within three processes associated with the research: facilitation, production and reception, attending to the complex and multifaceted interplay of audiovisual texts, their producers and their audiences throughout. 

Such a thesis is expedient given that powerful and often uncritical rhetoric that besets participatory research and development is fast taking hold within geography. It is also timely given the proliferation of affordable and accessible audiovisual technology and its increasing use within geography and other social sciences. As geographers respond to calls to embrace more visual, tactile and other methods, this thesis offers possibilities for the repoliticisation of participatory discourse within social geography, through a more considered engagement with participatory action research, Indigenous research practices and audiovisual media such as video. I offer cautionary insights into the ‘power-full’ effects of these ways of working.

text: 'Thinking-through-Complicity' with Te Iwi o Ngāti Hauiti: Towards a Critical Use of Participatory Video for Research This thesis explores some of the seductions and dangers of participatory video for research (PVR) involving Indigenous Māori and Pākehā research partners. The project within which PVR was used focused on exploring relationships between place, identity and social cohesion within ‘remote’ rural communities. It involved about 15 members of the Potaka whānau of Te Iwi o Ngāti Hauiti in the central Rangitīkei district of the North Island, Aotearoa New Zealand. A small group of iwi members, myself and an audiovisual specialist and trainer negotiated the project’s focus, process and ethics during 1998. A different group of iwi members were then trained in video production and community research methods later that year and supported to produce their own productions, and carry out video research interviews with other iwi members. The entire process of negotiation, training and collaborative research was filmed for archival and research purposes with everyone’s consent, and several collaborative publications and presentations have been produced since 1999.

The discursive space opened up by Ngāti Hauiti’s engagement with, and use of, video provides an opportunity to attend to the ‘cultural mediations’ that occurred throughout the research partnership and to inquire into the possible ‘empire building effects’ of visual technologies within participatory research more generally. The focus on PVR within a Māori context also prompts questions about the visual’s transformative potential within geographic research, and the implications of working through the use of a visual medium for rethinking disciplinary practices and knowledges, particularly when working cross-culturally. 

In the thesis, I first review the evolution and attendant challenges associated with both the use of participation and video within research contexts. I trace their similar origins in modernist attempts to ‘know’ and ‘empower’ marginalised others, and highlight the ongoing marginalisation of Indigenous perspectives within mainstream debates. I then engage with conceptualisations of complicity and develop an analytical framework that expands on current discursive and ideological discussions to also attend to its material, embodied and spatial dimensions.

Using this framework and a complementary autoethnographic and ‘hyper-self-reflexive’ approach, I track aspects of my own power, complicity and desire within my research practice in the PVR project during the period 1998-2001. This approach involves the development of a particular reading position to focus on critical incidents of my research practice and a means of grappling productively with the polyvalent nature of my audiovisual and other information sources. I discuss these critical incidents within three processes associated with the research: facilitation, production and reception, attending to the complex and multifaceted interplay of audiovisual texts, their producers and their audiences throughout. 

Such a thesis is expedient given that powerful and often uncritical rhetoric that besets participatory research and development is fast taking hold within geography. It is also timely given the proliferation of affordable and accessible audiovisual technology and its increasing use within geography and other social sciences. As geographers respond to calls to embrace more visual, tactile and other methods, this thesis offers possibilities for the repoliticisation of participatory discourse within social geography, through a more considered engagement with participatory action research, Indigenous research practices and audiovisual media such as video. I offer cautionary insights into the ‘power-full’ effects of these ways of working.

year: 2012

title: The riots in Ferguson, Missouri as a sequel of the movie ‘The Purge’ - Freedom of Speech in the Age of New Media

authors: Goltz, Nachshon (Sean)

abstract: In the wake of the Supreme Court decisions in Stevenes v. US and Brown v. Entertainment, shielding animals cruelty depictions and violent video games under the freedom of speech, an invisible and dangerous line has been crossed. This paper will argue that these decisions and the violent message they carry with them, seeps under the surface of the American society fabric - conscious and unconscious - causing unprecedented consequences. These consequences can be seen in the movie the Purge, the riots in Ferguson and the events that caused them and even in the academic discourse as it unfolds in the media ecology association list serve.

text: The riots in Ferguson, Missouri as a sequel of the movie ‘The Purge’ - Freedom of Speech in the Age of New Media In the wake of the Supreme Court decisions in Stevenes v. US and Brown v. Entertainment, shielding animals cruelty depictions and violent video games under the freedom of speech, an invisible and dangerous line has been crossed. This paper will argue that these decisions and the violent message they carry with them, seeps under the surface of the American society fabric - conscious and unconscious - causing unprecedented consequences. These consequences can be seen in the movie the Purge, the riots in Ferguson and the events that caused them and even in the academic discourse as it unfolds in the media ecology association list serve.

year: 2017