title: The use of chronosequences in studies of ecological succession and soil development

authors: Walker, Lawrence R.

subjects: chronosequences

abstract: 1. Chronosequences and associated space-for-time substitutions are an important and often necessary tool for studying temporal dynamics of plant communities and soil development across multiple time-scales. However, they are often used inappropriately, leading to false conclusions about ecological patterns and processes, which has prompted recent strong criticism of the approach. Here, we evaluate when chronosequences may or may not be appropriate for studying community and ecosystem development.
2. Chronosequences are appropriate to study plant succession at decadal to millennial time-scales when there is evidence that sites of different ages are following the same trajectory. They can also be reliably used to study aspects of soil development that occur between temporally linked sites over time-scales of centuries to millennia, sometimes independently of their application to shorter-term plant and soil biological communities.
3. Some characteristics of changing plant and soil biological communities (e.g. species richness, plant cover, vegetation structure, soil organic matter accumulation) are more likely to be related in a predictable and temporally linear manner than are other characteristics (e.g. species composition and abundance) and are therefore more reliably studied using a chronosequence approach.
4. Chronosequences are most appropriate for studying communities that are following convergent successional trajectories and have low biodiversity, rapid species turnover and low frequency and severity of disturbance. Chronosequences are least suitable for studying successional trajectories that are divergent, species-rich, highly disturbed or arrested in time because then there are often major difficulties in determining temporal linkages between stages.
5. Synthesis. We conclude that, when successional trajectories exceed the life span of investigators and the experimental and observational studies that they perform, temporal change can be successfully explored through the judicious use of chronosequences.

text: The use of chronosequences in studies of ecological succession and soil development 1. Chronosequences and associated space-for-time substitutions are an important and often necessary tool for studying temporal dynamics of plant communities and soil development across multiple time-scales. However, they are often used inappropriately, leading to false conclusions about ecological patterns and processes, which has prompted recent strong criticism of the approach. Here, we evaluate when chronosequences may or may not be appropriate for studying community and ecosystem development.
2. Chronosequences are appropriate to study plant succession at decadal to millennial time-scales when there is evidence that sites of different ages are following the same trajectory. They can also be reliably used to study aspects of soil development that occur between temporally linked sites over time-scales of centuries to millennia, sometimes independently of their application to shorter-term plant and soil biological communities.
3. Some characteristics of changing plant and soil biological communities (e.g. species richness, plant cover, vegetation structure, soil organic matter accumulation) are more likely to be related in a predictable and temporally linear manner than are other characteristics (e.g. species composition and abundance) and are therefore more reliably studied using a chronosequence approach.
4. Chronosequences are most appropriate for studying communities that are following convergent successional trajectories and have low biodiversity, rapid species turnover and low frequency and severity of disturbance. Chronosequences are least suitable for studying successional trajectories that are divergent, species-rich, highly disturbed or arrested in time because then there are often major difficulties in determining temporal linkages between stages.
5. Synthesis. We conclude that, when successional trajectories exceed the life span of investigators and the experimental and observational studies that they perform, temporal change can be successfully explored through the judicious use of chronosequences.

year: 2010

title: Introduction to the landscapes and soils of the Hamilton Basin

authors: Lowe, David J.

subjects: Hamilton Basin

abstract: The Hamilton Basin area is characterised by four main landscape units or landforms as depicted in the block diagrams below (McCraw, 1967, 2002; Bruce, 1979; Selby and Lowe, 1992), and these provide a soil-landscape model to predict the soil pattern.

text: Introduction to the landscapes and soils of the Hamilton Basin The Hamilton Basin area is characterised by four main landscape units or landforms as depicted in the block diagrams below (McCraw, 1967, 2002; Bruce, 1979; Selby and Lowe, 1992), and these provide a soil-landscape model to predict the soil pattern.

year: 2010

title: Demystifying a relationship between voluntary work and Māori

authors: Te Momo, Oliver Helena Fiona

abstract: The purpose of this thesis is to provide evidence that critically reviews the relationship between Māori and voluntary work in social service organisations. Since colonisation very little research has been initiated that investigated the involvement of Māori in voluntary activity yet recent statistics show that Māori are the highest participants in this type of work. This thesis provides an analysis of the relationship of Māori to voluntary work and its evolution in a Colonial State, Liberal State, Welfare State, and Neo-Liberal State in New Zealand. Three perspectives of Māori voluntary work provide the foundation for the analysis of this relationship. The first perspective describes voluntary work from a personal experience as an insider. The second perspective explores literature that records Māori involvement in voluntary activity. The third perspective documents life experiences from Māori voluntary workers in New Zealand communities. The three perspectives provide an empirical foundation for the type of relationship that has developed between Māori and voluntary work; Māori and the State; Māori and their place in New Zealand society. My interest in Te Ao Māori (the Māori world) as a valid and thriving ontological position and my academic interest in critical theory provide the theoretical lens for my analysis. 

Personal experience as a Māori volunteer opened doors to the communities I entered and added strength to the research, the first perspective. Western research in Māori communities often by non-Māori researchers, was conducted to gather knowledge for Western policy makers. Māori knowledge was not recognised as valid and the people were treated as objects. Knowing this, I searched for an approach that valued Māori participants, valued Māori people, and contained cultural aspects that separated the procedure from Western research. A review of literature, the second perspective, introduced a cultural approach to research termed kaupapa Māori research, generated out of and for Te Ao Māori detailed further in Chapter Three.

Participants’ life experiences coupled with literature provide a wealth of knowledge and a testimony to the type of relationship that exists between Māori and voluntary work. Criticism from Māori communities as to the exploitation of Māori volunteers has swelled in recent years so that the environment volunteers work in is no longer attractive to Māori people. Therefore, documenting the life experiences of Māori who participate in voluntary work as the primary source of information was imperative and produced evidence to describe the relationship between Māori and voluntary work in the thesis. A triangular study: case study, community study, and cross-section study (Chapters Six, Seven, and Eight), provide the ‘grass roots voices’ and represent the third perspective. 

My observation of Māori organisations’ involvement in voluntary work generated in me a deep concern in what appeared to be an involvement in activity that improved neither the lives of the volunteers nor the wider problems to which they attributed their aroha. This involvement activity is a product of historical developments whereby the Western ideology of voluntary work became confused with a Māori ideology of collective participation. This confusion has created an environment where Māori voluntary organisations are working unpaid with insufficient resources in oppressive conditions in the attempt to provide social solutions. I argue that the Māori ideology of collective participation has been co-opted in the emerging conflict of neo-liberalism to provide social services in communities which government agencies exploit. In conclusion, the thesis is a journey through the world of voluntary work for Māori in communal organisations.

text: Demystifying a relationship between voluntary work and Māori The purpose of this thesis is to provide evidence that critically reviews the relationship between Māori and voluntary work in social service organisations. Since colonisation very little research has been initiated that investigated the involvement of Māori in voluntary activity yet recent statistics show that Māori are the highest participants in this type of work. This thesis provides an analysis of the relationship of Māori to voluntary work and its evolution in a Colonial State, Liberal State, Welfare State, and Neo-Liberal State in New Zealand. Three perspectives of Māori voluntary work provide the foundation for the analysis of this relationship. The first perspective describes voluntary work from a personal experience as an insider. The second perspective explores literature that records Māori involvement in voluntary activity. The third perspective documents life experiences from Māori voluntary workers in New Zealand communities. The three perspectives provide an empirical foundation for the type of relationship that has developed between Māori and voluntary work; Māori and the State; Māori and their place in New Zealand society. My interest in Te Ao Māori (the Māori world) as a valid and thriving ontological position and my academic interest in critical theory provide the theoretical lens for my analysis. 

Personal experience as a Māori volunteer opened doors to the communities I entered and added strength to the research, the first perspective. Western research in Māori communities often by non-Māori researchers, was conducted to gather knowledge for Western policy makers. Māori knowledge was not recognised as valid and the people were treated as objects. Knowing this, I searched for an approach that valued Māori participants, valued Māori people, and contained cultural aspects that separated the procedure from Western research. A review of literature, the second perspective, introduced a cultural approach to research termed kaupapa Māori research, generated out of and for Te Ao Māori detailed further in Chapter Three.

Participants’ life experiences coupled with literature provide a wealth of knowledge and a testimony to the type of relationship that exists between Māori and voluntary work. Criticism from Māori communities as to the exploitation of Māori volunteers has swelled in recent years so that the environment volunteers work in is no longer attractive to Māori people. Therefore, documenting the life experiences of Māori who participate in voluntary work as the primary source of information was imperative and produced evidence to describe the relationship between Māori and voluntary work in the thesis. A triangular study: case study, community study, and cross-section study (Chapters Six, Seven, and Eight), provide the ‘grass roots voices’ and represent the third perspective. 

My observation of Māori organisations’ involvement in voluntary work generated in me a deep concern in what appeared to be an involvement in activity that improved neither the lives of the volunteers nor the wider problems to which they attributed their aroha. This involvement activity is a product of historical developments whereby the Western ideology of voluntary work became confused with a Māori ideology of collective participation. This confusion has created an environment where Māori voluntary organisations are working unpaid with insufficient resources in oppressive conditions in the attempt to provide social solutions. I argue that the Māori ideology of collective participation has been co-opted in the emerging conflict of neo-liberalism to provide social services in communities which government agencies exploit. In conclusion, the thesis is a journey through the world of voluntary work for Māori in communal organisations.

year: 2003