title: Quantified vegetation change over 42 years at Cape Hallett, East Antarctica

authors: Brabyn, Lars

subjects: algae

abstract: This paper reports on the remapping of a carefully documented vegetation plot at Cape Hallett (72°19′S 170°16′E) to provide an assessment of the rates of vegetation change over decadal time scales. E.D. Rudolph, in 1962, mapped in detail the vegetation of a site approximately 28 m by 120 m at Cape Hallett, Victoria Land, Antarctica. This site was relocated and remapped in January 2004 and changes were assessed using GIS techniques. This appears to be the longest available time period for assessing vegetation change in Antarctica. The analysis indicated that considerable change had occurred in moss and algae distribution patterns and this seems to have been caused by increased water supply, particularly in wetter areas. There was also evidence of some change in lichen distribution. The extent of the change indicates that vegetation cover can be used for monitoring change in areas as extreme as the Ross Sea region. For this analysis to be successful it was important that the mapping techniques used were totally explicit and could easily be replicated. Fortunately, Rudolph had defined his cover classes and the site was also clearly marked. The application of GIS mapping techniques allows the mapping to be more explicitly defined and easily replicated.

text: Quantified vegetation change over 42 years at Cape Hallett, East Antarctica This paper reports on the remapping of a carefully documented vegetation plot at Cape Hallett (72°19′S 170°16′E) to provide an assessment of the rates of vegetation change over decadal time scales. E.D. Rudolph, in 1962, mapped in detail the vegetation of a site approximately 28 m by 120 m at Cape Hallett, Victoria Land, Antarctica. This site was relocated and remapped in January 2004 and changes were assessed using GIS techniques. This appears to be the longest available time period for assessing vegetation change in Antarctica. The analysis indicated that considerable change had occurred in moss and algae distribution patterns and this seems to have been caused by increased water supply, particularly in wetter areas. There was also evidence of some change in lichen distribution. The extent of the change indicates that vegetation cover can be used for monitoring change in areas as extreme as the Ross Sea region. For this analysis to be successful it was important that the mapping techniques used were totally explicit and could easily be replicated. Fortunately, Rudolph had defined his cover classes and the site was also clearly marked. The application of GIS mapping techniques allows the mapping to be more explicitly defined and easily replicated.

year: 2006

title: Assessing the food preference of the brushtail possum (Trichosurus vulpecular) using fixed-ratio schedules

authors: Jenkins, Ayla Nicky Te Rau O Riwa

subjects: Food preference

abstract: The quality of different foods has been found in previous studies to effect an animal’s performance on fixed-ratio schedules. Foods that are of a higher quality should maintain behaviour to larger fixed-ratio values than foods of a lower quality. The present study examined the performance maintained by increasing fixed-ratio schedules by four different foods (Rolled Oats, Cocoa Puffs™ and flaked barley, All Bran™ and Soy Protein) with six brushtail possum (Trischosurus vulpecula). Overall response rates and running response rates both generally showed a bitonic function, and post-reinforcement pauses showed a modest increase with increases in the fixed-ratio. The equations of two quantitative models; Behavioural economics and mathematical principles of reinforcement (MPR) were fitted to the data to see how different food types affected the two models ability to predict behaviour. This was measured through two parameter estimates, alpha (α) and specific activation (αs). Both demand equations and the MPR equation described the data fairly well. The parameter estimates for specific activation (αs) showed a significant difference in value across the foods, but there was no significant difference across foods for parameter estimates of alpha (α). There was a weak correlation between parameter estimates of α and αs (r =-0.245, p =0.0926) . The four foods used in this study were also tested in a paired-stimulus preference assessment. The foods that were assessed as being of more value in the behavioural economic equations and the MPR model, for some possums were identified as being more preferred, but this was not consistent for all possums.

text: Assessing the food preference of the brushtail possum (Trichosurus vulpecular) using fixed-ratio schedules The quality of different foods has been found in previous studies to effect an animal’s performance on fixed-ratio schedules. Foods that are of a higher quality should maintain behaviour to larger fixed-ratio values than foods of a lower quality. The present study examined the performance maintained by increasing fixed-ratio schedules by four different foods (Rolled Oats, Cocoa Puffs™ and flaked barley, All Bran™ and Soy Protein) with six brushtail possum (Trischosurus vulpecula). Overall response rates and running response rates both generally showed a bitonic function, and post-reinforcement pauses showed a modest increase with increases in the fixed-ratio. The equations of two quantitative models; Behavioural economics and mathematical principles of reinforcement (MPR) were fitted to the data to see how different food types affected the two models ability to predict behaviour. This was measured through two parameter estimates, alpha (α) and specific activation (αs). Both demand equations and the MPR equation described the data fairly well. The parameter estimates for specific activation (αs) showed a significant difference in value across the foods, but there was no significant difference across foods for parameter estimates of alpha (α). There was a weak correlation between parameter estimates of α and αs (r =-0.245, p =0.0926) . The four foods used in this study were also tested in a paired-stimulus preference assessment. The foods that were assessed as being of more value in the behavioural economic equations and the MPR model, for some possums were identified as being more preferred, but this was not consistent for all possums.

year: 2014

title: Are You Listening? The Voice of Waitaha, A Forgotten People.

authors: Reese, Alistair William

subjects: maori

abstract: This thesis is a study of Waitaha, a Bay of Plenty iwi that has been marginalized through
the loss of most of its land, much of its language, tikanga, and mana. The purpose of the
work is to communicate, through the 'voice' and the history of the people, a chronicle, of
their alienation to a Pākehā audience that remains in large part ignorant and distant from
their plight.
The thesis is motivated by an academic responsibility to the Treaty of Waitangi and the
lack of understanding to the present needs of Māori as evidenced for example, by the
support for the January 2004 Orewa speech, by the leader of the National Party, Don
Brash. It is predicated upon the understanding that this response, which minimalises the
impact of colonization upon Māori, is constructed by many, through a convenience of
distance. It is motivated also on the understanding that most Pākehā who now inhabit the rohe of Waitaha, are completely ignorant of the identity of tangata whenua. It is hoped
that the presentation of the Waitaha story, will provoke a greater empathy from Pākehā,
and thereby facilitate an environment, whereby grievances can be addressed in an
environment of greater understanding.
The thesis is a qualitative based research exercise, carried out in consultation with
kaumātua and other Waitaha members, and attempts to acknowledge and integrate current kaupapa Māori epistemologies with traditional Western academic methodology.
The study uses interviews, Waitangi Tribunal evidence, and other historical references to
construct a narrative that conveys something of the 'voice' of Waitaha. Specifically, it
outlines a chronology of Waitaha settlement, followed by a description of their encounter
with Pākehā, the consequent alienation of the majority of their lands by the Crown, and
concludes, with a glimpse into the current circumstance of Manoeka, the papakainga of
Waitaha.

text: Are You Listening? The Voice of Waitaha, A Forgotten People. This thesis is a study of Waitaha, a Bay of Plenty iwi that has been marginalized through
the loss of most of its land, much of its language, tikanga, and mana. The purpose of the
work is to communicate, through the 'voice' and the history of the people, a chronicle, of
their alienation to a Pākehā audience that remains in large part ignorant and distant from
their plight.
The thesis is motivated by an academic responsibility to the Treaty of Waitangi and the
lack of understanding to the present needs of Māori as evidenced for example, by the
support for the January 2004 Orewa speech, by the leader of the National Party, Don
Brash. It is predicated upon the understanding that this response, which minimalises the
impact of colonization upon Māori, is constructed by many, through a convenience of
distance. It is motivated also on the understanding that most Pākehā who now inhabit the rohe of Waitaha, are completely ignorant of the identity of tangata whenua. It is hoped
that the presentation of the Waitaha story, will provoke a greater empathy from Pākehā,
and thereby facilitate an environment, whereby grievances can be addressed in an
environment of greater understanding.
The thesis is a qualitative based research exercise, carried out in consultation with
kaumātua and other Waitaha members, and attempts to acknowledge and integrate current kaupapa Māori epistemologies with traditional Western academic methodology.
The study uses interviews, Waitangi Tribunal evidence, and other historical references to
construct a narrative that conveys something of the 'voice' of Waitaha. Specifically, it
outlines a chronology of Waitaha settlement, followed by a description of their encounter
with Pākehā, the consequent alienation of the majority of their lands by the Crown, and
concludes, with a glimpse into the current circumstance of Manoeka, the papakainga of
Waitaha.

year: 2006