title: Maintained generalization of delay-specific remembering

authors: White, K. Geoffrey

subjects: memory

abstract: According to the discrimination hypothesis (White, 2002), remembering is a delay-specific discrimination made at the time of retrieval. In the present experiment the delay-specific nature of the discrimination was made explicit by making correct choices in a delayed matching-to-sample task performed by pigeons conditional on whether the retention interval was short or long. Retention interval was varied over several durations in a maintained generalization test without reinforcement for correct matching responses. Opposing gradients demonstrated generalization of delay-specific remembering, consistent with the view that the temporal dimension of the retention interval can be treated in the same way as non-temporal dimensions of the sample stimulus.

text: Maintained generalization of delay-specific remembering According to the discrimination hypothesis (White, 2002), remembering is a delay-specific discrimination made at the time of retrieval. In the present experiment the delay-specific nature of the discrimination was made explicit by making correct choices in a delayed matching-to-sample task performed by pigeons conditional on whether the retention interval was short or long. Retention interval was varied over several durations in a maintained generalization test without reinforcement for correct matching responses. Opposing gradients demonstrated generalization of delay-specific remembering, consistent with the view that the temporal dimension of the retention interval can be treated in the same way as non-temporal dimensions of the sample stimulus.

year: 2011

title: Phosphorus and arsenic distributions in a seasonally-stratified, iron- and manganese-rich lake: microbiological and geochemical controls

authors: Hartland, Adam

abstract: Seasonal stratification in temperate lakes greater than a few metres deep provides conditions amenable to pronounced vertical zonation of redox chemistry. Such changes are particularly evident in eutrophic systems where high phytoplankton biomass often leads to seasonally-established anoxic hypolimnia and profound changes in geochemical conditions. In this study, we investigated the behaviour of trace elements in the water column of a seasonally-stratified, eutrophic lake. Two consecutive years of data from Lake Ngapouri, North Island, New Zealand, demonstrate the occurrence of highly correlated profiles of phosphorus (P), arsenic (As), iron (Fe) and manganese (Mn), all of which increased in concentration by 1-2 orders of magnitude within the anoxic hypolimnion. Stoichiometric and mass-balance considerations demonstrate that increases in alkalinity in hypolimnetic waters were consistent with observed changes in sulfate, Fe and Mn concentrations with depth, corresponding to dissimilatory reduction of sulfate, Fe(III) and Mn(IV) hydroxides. Thermodynamic constraints on Fe, Mn and Al solubility indicate that amorphous Fe(III), Mn(IV) hydroxides most probably controlled Fe and Mn in the surface mixed layer (~0 to 8 m) while Al(III) hydroxides were supersaturated throughout the entire system. Surface complexation modelling indicated that iron hydroxides (HFO) potentially dominated As speciation in the lake. It is likely that other colloidal phases such as allophanic clays also limited HPO42- activity, reducing competition for HAsO42- adsorption to iron hydroxides. This research highlights the coupling of P, As, Fe and Mn in Lake Ngapouri, and the apparent role of multiple colloidal phases in affecting P and As activity within overarching microbiological and geochemical processes.

text: Phosphorus and arsenic distributions in a seasonally-stratified, iron- and manganese-rich lake: microbiological and geochemical controls Seasonal stratification in temperate lakes greater than a few metres deep provides conditions amenable to pronounced vertical zonation of redox chemistry. Such changes are particularly evident in eutrophic systems where high phytoplankton biomass often leads to seasonally-established anoxic hypolimnia and profound changes in geochemical conditions. In this study, we investigated the behaviour of trace elements in the water column of a seasonally-stratified, eutrophic lake. Two consecutive years of data from Lake Ngapouri, North Island, New Zealand, demonstrate the occurrence of highly correlated profiles of phosphorus (P), arsenic (As), iron (Fe) and manganese (Mn), all of which increased in concentration by 1-2 orders of magnitude within the anoxic hypolimnion. Stoichiometric and mass-balance considerations demonstrate that increases in alkalinity in hypolimnetic waters were consistent with observed changes in sulfate, Fe and Mn concentrations with depth, corresponding to dissimilatory reduction of sulfate, Fe(III) and Mn(IV) hydroxides. Thermodynamic constraints on Fe, Mn and Al solubility indicate that amorphous Fe(III), Mn(IV) hydroxides most probably controlled Fe and Mn in the surface mixed layer (~0 to 8 m) while Al(III) hydroxides were supersaturated throughout the entire system. Surface complexation modelling indicated that iron hydroxides (HFO) potentially dominated As speciation in the lake. It is likely that other colloidal phases such as allophanic clays also limited HPO42- activity, reducing competition for HAsO42- adsorption to iron hydroxides. This research highlights the coupling of P, As, Fe and Mn in Lake Ngapouri, and the apparent role of multiple colloidal phases in affecting P and As activity within overarching microbiological and geochemical processes.

year: 2015

title: River Co-management and Planning in the Waikato: An Analysis of Regional and District Plans and Regional Policy Statement Compliance, and a New Approach to Plan Preparation

authors: den Ouden, Hester

subjects: co-management

abstract: The Waikato River is one of New Zealand most significant rivers.  It is an ancestor to one Iwi, significant to four other Iwi generates most of the country’s hydroelectricity and provides large amount of potable water to municipalities.
In 2010 and 2012 three Acts of parliament established the framework for the restoration and protection of the Waikato River Catchment.  It did so in three ways.  The River Co-Management Legislation (RCML) has significantly added to the policy framework under the Resource Management Act 1991 for the Waikato Regional and six Districts.  It introduced the requirement for co-management of decision-making at policy and regulatory approvals, and established the Waikato River Authority which manages a $270 million Clean-Up fund.
This research outlines the provisions of the three statutes that comprise the RCML, how legislation changed the hierarchy of the planning framework, and identifies areas where improvements could be made.  
The RCML introduces a ‘Vision and Strategy’ as a National Policy Statement for the area of the region within the Waikato River Catchment.  The ‘Vision and Strategy’ comprises 13 statements that are the Vision and 12 statements that are the strategy, collectively referred to as stratagems.  The research assesses each plan and policy statement within the Waikato River catchment to determine the nature and level of incorporation of the 25 stratagems of ‘Vision and Strategy’.
A new approach in planning is the requirement for the use of Maatauranga Maaori along with western science, the Māori and western science worldviews.  These worldviews are discussed.  Three Models that use Maatauranga Maaori principles are described.  The purpose of this has been to begin a discussion on the basis of another perspective in future plan and policy making that included better provisions based on the Maatauranga Maaori worldview.
The Planning Under a Co-operative Mandate (PUCM) project assisted in identify criteria against which to assess the regional and district plans and regional policy statement, their quality, comprehensiveness of inclusion of the ‘Vision and Strategy’ stratagems, and the required cascading nature of Objective policies and methods that are contain in the plans and regional policy statement.   
Key findings were that the provisions or inclusion of the ‘Vision and Strategy’ Stratagems was mixed, high in the case of scientifically quantifiable matters and poor and non-existent where matters to be included were less able to be quantified and qualified in a western science worldview.  The strengths and weakness of including the ‘Vision and Strategy’ Stratagems varied and the strength of that inclusion was identified.
A consequential finding was the overall quality of the plans themselves.  The first PUCM report to government in 2001 on plan quality, scored all six districts and regional plans below 50%.  Using PUCM project criteria to assess the degree to which the Stratagems were included in the plans in 2016 showed a similar result.  The consequential findings also found confusion over the nature of good objective, policy and method drafting.  It also found significant lack of cascading from objectives through policies to methods.

text: River Co-management and Planning in the Waikato: An Analysis of Regional and District Plans and Regional Policy Statement Compliance, and a New Approach to Plan Preparation The Waikato River is one of New Zealand most significant rivers.  It is an ancestor to one Iwi, significant to four other Iwi generates most of the country’s hydroelectricity and provides large amount of potable water to municipalities.
In 2010 and 2012 three Acts of parliament established the framework for the restoration and protection of the Waikato River Catchment.  It did so in three ways.  The River Co-Management Legislation (RCML) has significantly added to the policy framework under the Resource Management Act 1991 for the Waikato Regional and six Districts.  It introduced the requirement for co-management of decision-making at policy and regulatory approvals, and established the Waikato River Authority which manages a $270 million Clean-Up fund.
This research outlines the provisions of the three statutes that comprise the RCML, how legislation changed the hierarchy of the planning framework, and identifies areas where improvements could be made.  
The RCML introduces a ‘Vision and Strategy’ as a National Policy Statement for the area of the region within the Waikato River Catchment.  The ‘Vision and Strategy’ comprises 13 statements that are the Vision and 12 statements that are the strategy, collectively referred to as stratagems.  The research assesses each plan and policy statement within the Waikato River catchment to determine the nature and level of incorporation of the 25 stratagems of ‘Vision and Strategy’.
A new approach in planning is the requirement for the use of Maatauranga Maaori along with western science, the Māori and western science worldviews.  These worldviews are discussed.  Three Models that use Maatauranga Maaori principles are described.  The purpose of this has been to begin a discussion on the basis of another perspective in future plan and policy making that included better provisions based on the Maatauranga Maaori worldview.
The Planning Under a Co-operative Mandate (PUCM) project assisted in identify criteria against which to assess the regional and district plans and regional policy statement, their quality, comprehensiveness of inclusion of the ‘Vision and Strategy’ stratagems, and the required cascading nature of Objective policies and methods that are contain in the plans and regional policy statement.   
Key findings were that the provisions or inclusion of the ‘Vision and Strategy’ Stratagems was mixed, high in the case of scientifically quantifiable matters and poor and non-existent where matters to be included were less able to be quantified and qualified in a western science worldview.  The strengths and weakness of including the ‘Vision and Strategy’ Stratagems varied and the strength of that inclusion was identified.
A consequential finding was the overall quality of the plans themselves.  The first PUCM report to government in 2001 on plan quality, scored all six districts and regional plans below 50%.  Using PUCM project criteria to assess the degree to which the Stratagems were included in the plans in 2016 showed a similar result.  The consequential findings also found confusion over the nature of good objective, policy and method drafting.  It also found significant lack of cascading from objectives through policies to methods.

year: 2017