title: Temporal dynamics of geothermal microbial communities in Aotearoa-New Zealand

authors: Power, Jean Florence

abstract: Microbial biogeography studies, in particular for geothermal-associated habitats, have focused on spatial patterns and/or individual sites, which have limited ability to describe the dynamics of ecosystem behaviour. Here, we report the first comprehensive temporal study of bacterial and archaeal communities from an extensive range of geothermal features in Aotearoa-New Zealand. One hundred and fifteen water column samples from 31 geothermal ecosystems were taken over a 34-month period to ascertain microbial community stability (control sites), community response to both natural and anthropogenic disturbances in the local environment (disturbed sites) and temporal variation in spring diversity across different pH values (pH 3, 5, 7, 9) all at a similar temperature of 60–70°C (pH sites). Identical methodologies were employed to measure microbial diversity via 16S rRNA gene amplicon sequencing, along with 44 physicochemical parameters from each feature, to ensure confidence in comparing samples across timeframes. Our results indicated temperature and associated groundwater physicochemistry were the most likely parameters to vary stochastically in these geothermal features, with community abundances rather than composition more readily affected by a changing environment. However, variation in pH (pH ±1) had a more significant effect on community structure than temperature (±20°C), with alpha diversity failing to adequately measure temporal microbial disparity in geothermal features outside of circumneutral conditions. While a substantial physicochemical disturbance was required to shift community structures at the phylum level, geothermal ecosystems were resilient at this broad taxonomic rank and returned to a pre-disturbed state if environmental conditions re-established. These findings highlight the diverse controls between different microbial communities within the same habitat-type, expanding our understanding of temporal dynamics in extreme ecosystems.

text: Temporal dynamics of geothermal microbial communities in Aotearoa-New Zealand Microbial biogeography studies, in particular for geothermal-associated habitats, have focused on spatial patterns and/or individual sites, which have limited ability to describe the dynamics of ecosystem behaviour. Here, we report the first comprehensive temporal study of bacterial and archaeal communities from an extensive range of geothermal features in Aotearoa-New Zealand. One hundred and fifteen water column samples from 31 geothermal ecosystems were taken over a 34-month period to ascertain microbial community stability (control sites), community response to both natural and anthropogenic disturbances in the local environment (disturbed sites) and temporal variation in spring diversity across different pH values (pH 3, 5, 7, 9) all at a similar temperature of 60–70°C (pH sites). Identical methodologies were employed to measure microbial diversity via 16S rRNA gene amplicon sequencing, along with 44 physicochemical parameters from each feature, to ensure confidence in comparing samples across timeframes. Our results indicated temperature and associated groundwater physicochemistry were the most likely parameters to vary stochastically in these geothermal features, with community abundances rather than composition more readily affected by a changing environment. However, variation in pH (pH ±1) had a more significant effect on community structure than temperature (±20°C), with alpha diversity failing to adequately measure temporal microbial disparity in geothermal features outside of circumneutral conditions. While a substantial physicochemical disturbance was required to shift community structures at the phylum level, geothermal ecosystems were resilient at this broad taxonomic rank and returned to a pre-disturbed state if environmental conditions re-established. These findings highlight the diverse controls between different microbial communities within the same habitat-type, expanding our understanding of temporal dynamics in extreme ecosystems.

year: 2023-01-01

title: Super-size your control of language: Inter-propositional relations as a tool for textual analysis in language learning

authors: Johnson, Diane

subjects: Language & education

abstract: In what might be considered traditional approaches to language teaching and learning, the focus is often on lexical or syntactic issues and instruction is often limited to phrase, clause or sentence. While learning at this level is important, it is also the case that learners, in developing a high degree of control of their target language, need to be taught skills that will give them the capacity to decode and encode complete texts of a variety of types in a variety of contexts. While, over the last two decades, some researchers have made some useful suggestions about approaches to the issue of above-sentence-level language control, they generally make little reference to the role of mental operations in textual comprehension. Against a background of Crombie’s work on inter-propositional relations, the overall objective of this paper is to demonstrate, with reference to a specific example, the extent to which an interpropositional approach provides a potentially rich methodological tool for language teachers and a mechanism for promoting in-depth comprehension of texts.

text: Super-size your control of language: Inter-propositional relations as a tool for textual analysis in language learning In what might be considered traditional approaches to language teaching and learning, the focus is often on lexical or syntactic issues and instruction is often limited to phrase, clause or sentence. While learning at this level is important, it is also the case that learners, in developing a high degree of control of their target language, need to be taught skills that will give them the capacity to decode and encode complete texts of a variety of types in a variety of contexts. While, over the last two decades, some researchers have made some useful suggestions about approaches to the issue of above-sentence-level language control, they generally make little reference to the role of mental operations in textual comprehension. Against a background of Crombie’s work on inter-propositional relations, the overall objective of this paper is to demonstrate, with reference to a specific example, the extent to which an interpropositional approach provides a potentially rich methodological tool for language teachers and a mechanism for promoting in-depth comprehension of texts.

year: 2010

title: An Assessment of the Cognitive Ability and the Attitude to Rehabilitation of European and Maori Trainees at a Borstal Institution.

authors: Zimmerman, Malcolm Laird

subjects: Borstal Institution

abstract: The incidence of delinquency in New Zealand has risen and is a cause for serious concern for the future of the nation. "As in all fields of social inquiry it is much easier to specify the problem than it is to account for its occurrence ... In the case of delinquency, it is much easier to record what has occurred as opposed to why - it is even more difficult to prevent delinquency from occurring at all. Why should this be so?" (Blizard, 1967, p.i.)
There are no easy answers: there are no short cuts to understanding: there will never be an easily worked out, or easily administered programme for prevention. The road is hard, costly both in terms of men, money and time.

text: An Assessment of the Cognitive Ability and the Attitude to Rehabilitation of European and Maori Trainees at a Borstal Institution. The incidence of delinquency in New Zealand has risen and is a cause for serious concern for the future of the nation. "As in all fields of social inquiry it is much easier to specify the problem than it is to account for its occurrence ... In the case of delinquency, it is much easier to record what has occurred as opposed to why - it is even more difficult to prevent delinquency from occurring at all. Why should this be so?" (Blizard, 1967, p.i.)
There are no easy answers: there are no short cuts to understanding: there will never be an easily worked out, or easily administered programme for prevention. The road is hard, costly both in terms of men, money and time.

year: 1971