title: Evaluating 50 years of time-series soil radiocarbon data: Towards routine calculation of robust C residence times

authors: Baisden, W. Troy

subjects: ¹⁴C

abstract: In 1959, Athol Rafter began a substantial programme of monitoring the flow of ¹⁴C produced by atmospheric thermonuclear tests through New Zealand's atmosphere, biosphere and soil. By building on the original measurements through ongoing sampling, a database of over 500 soil radiocarbon measurements spanning 50 years has now been compiled. The datasets, including an 11-point time series, allow strong focus on the robust quantification of residence times ranging from years to decades. We describe key aspects of the dataset, including the ability to identify critical assumptions inherent in calculating soil C residence times. The 3 most critical assumptions relate to: (1) the proportion of old C ("fraction passive"), (2) the lag time between photosynthesis and C entering the modeled pool, and (3) changes in the rates of C input (i. e., steady state). We demonstrate the ability to compare residence times in contrasting sites, such Andisols and non-Andisols, and the ability to calculate residence times across a range of soil depths. We use ¹⁴C in a two-box model to quantify soil carbon turnover parameters in deforested dairy pastures under similar climate in the Tokomaru silt loam (non-Andisol) versus the Egmont black loam (Andisol), originally sampled in 1962, 1965 and 1969, and resampled again in 2008. The ¹⁴C-based residence times of the main soil C pool in surface soil (~8 cm) are ~9 years in the Tokomaru soils compared to ~17 years for the Egmont soils. This difference represents nearly a doubling of soil C residence time, and roughly explains the doubling of the soil C stock. Passive soil C comprises 15% of the soil C pool in Tokomaru soils versus 27% in Egmont soils. A similar difference in residence times is found in a second surface soil comparison between the Bruntwood soil (Andisol) and the Te Kowhai soil (non-Andisol) with residence times of 18 and 27 years, respectively. The comparisons support evidence that C dynamics do differ in Andisols versus non-Andisols, as a result of both the mineral allophane and Al complexation. Expanding our calculations beyond surface soil, we show that thickening the calculation depth by combining horizons allows robust residence times to be calculated at a range of depths. Overall, the large and systematically collected dataset demonstrate that soil C residence times of the main soil C pool can be routinely calculated using ¹⁴C wherever samples collected 10 or more years apart in New Zealand grassland soils are available, and presumably under similar circumstances in other soils worldwide.

text: Evaluating 50 years of time-series soil radiocarbon data: Towards routine calculation of robust C residence times In 1959, Athol Rafter began a substantial programme of monitoring the flow of ¹⁴C produced by atmospheric thermonuclear tests through New Zealand's atmosphere, biosphere and soil. By building on the original measurements through ongoing sampling, a database of over 500 soil radiocarbon measurements spanning 50 years has now been compiled. The datasets, including an 11-point time series, allow strong focus on the robust quantification of residence times ranging from years to decades. We describe key aspects of the dataset, including the ability to identify critical assumptions inherent in calculating soil C residence times. The 3 most critical assumptions relate to: (1) the proportion of old C ("fraction passive"), (2) the lag time between photosynthesis and C entering the modeled pool, and (3) changes in the rates of C input (i. e., steady state). We demonstrate the ability to compare residence times in contrasting sites, such Andisols and non-Andisols, and the ability to calculate residence times across a range of soil depths. We use ¹⁴C in a two-box model to quantify soil carbon turnover parameters in deforested dairy pastures under similar climate in the Tokomaru silt loam (non-Andisol) versus the Egmont black loam (Andisol), originally sampled in 1962, 1965 and 1969, and resampled again in 2008. The ¹⁴C-based residence times of the main soil C pool in surface soil (~8 cm) are ~9 years in the Tokomaru soils compared to ~17 years for the Egmont soils. This difference represents nearly a doubling of soil C residence time, and roughly explains the doubling of the soil C stock. Passive soil C comprises 15% of the soil C pool in Tokomaru soils versus 27% in Egmont soils. A similar difference in residence times is found in a second surface soil comparison between the Bruntwood soil (Andisol) and the Te Kowhai soil (non-Andisol) with residence times of 18 and 27 years, respectively. The comparisons support evidence that C dynamics do differ in Andisols versus non-Andisols, as a result of both the mineral allophane and Al complexation. Expanding our calculations beyond surface soil, we show that thickening the calculation depth by combining horizons allows robust residence times to be calculated at a range of depths. Overall, the large and systematically collected dataset demonstrate that soil C residence times of the main soil C pool can be routinely calculated using ¹⁴C wherever samples collected 10 or more years apart in New Zealand grassland soils are available, and presumably under similar circumstances in other soils worldwide.

year: 2013

title: Application of Stereotypes in Marketing: Gender Cues and Brand Perception

authors: Hess, Alexandra C.

subjects: warmth

abstract: Stereotypes and their applications and implications have emerged as an important area of investigation in the field of marketing. Yet, despite the growing interest and relevance of stereotypes among marketing scholars, the marketing literature lacks a cohesive understanding of their concept and application. In particular, little research in the field of consumer behavior has examined the effects of stereotypes on brand perception and the subsequent influence on consumer purchase intention. 
The goal of this dissertation is to create a deeper and more cohesive understanding of stereotypes and their implications for marketing practitioners, with a particular focus on gender stereotypes and brand perception. This dissertation consists of three projects. 
The first project outlines a conceptual framework of stereotypes and their application in the field of marketing by integrating knowledge from social psychology literature with knowledge from consumer behavior and marketing. Based on this framework, gaps in the marketing literature are identified and suggestions for future research are provided. 
Building upon project one, project two seeks to identify applications of stereotypes in the field of marketing. In particular, project two explores whether the use of gender stereotypes via gender cues (e.g., colors such as blue or pink) in a product description can influence brand perception along the warmth and competence dimensions and, consequently, impact upon consumer purchase intention. Further, the effect of gender cues is tested dependent upon the gender type of the product. The results indicate that feminine cues enhance perceived warmth which, in turn, increases purchase likelihood for masculine products. Perceived warmth serves as a mediator between the gender cue and purchasing likelihood, yet competence does not. 
Project three builds upon and integrates the findings from project two by investigating the effect of gender cues in the presence of warmth and competence cues. Thereby, a theoretical framework is proposed which takes multiple warmth and competence cues into account. Subsequently, this theoretical framework is used to assess the effects of gender cues, as well as warmth and competence cues, on consumer perception of brands and their purchase intention. Consistent with the theoretical framework, this project explores that feminine cues enhance perceived brand warmth and purchase intention when paired with a high competence cue, yet backfires when paired with a low competence cue. In contrast, implicit masculine gender cues enhance perceived brand competence and purchase intention when paired with low competence cues yet backfire when combined with high competence cues. 
Overall, this dissertation proposes recommendations on how practitioners are able to effectively use gender cues (i.e., butterflies, bears, circles, squares, colors such as pink and blue) as part of gender stereotypes within a firm’s marketing efforts (i.e., background of print ads or on the product packaging) to achieve desired consumer brand perception and improve purchase likelihood.

text: Application of Stereotypes in Marketing: Gender Cues and Brand Perception Stereotypes and their applications and implications have emerged as an important area of investigation in the field of marketing. Yet, despite the growing interest and relevance of stereotypes among marketing scholars, the marketing literature lacks a cohesive understanding of their concept and application. In particular, little research in the field of consumer behavior has examined the effects of stereotypes on brand perception and the subsequent influence on consumer purchase intention. 
The goal of this dissertation is to create a deeper and more cohesive understanding of stereotypes and their implications for marketing practitioners, with a particular focus on gender stereotypes and brand perception. This dissertation consists of three projects. 
The first project outlines a conceptual framework of stereotypes and their application in the field of marketing by integrating knowledge from social psychology literature with knowledge from consumer behavior and marketing. Based on this framework, gaps in the marketing literature are identified and suggestions for future research are provided. 
Building upon project one, project two seeks to identify applications of stereotypes in the field of marketing. In particular, project two explores whether the use of gender stereotypes via gender cues (e.g., colors such as blue or pink) in a product description can influence brand perception along the warmth and competence dimensions and, consequently, impact upon consumer purchase intention. Further, the effect of gender cues is tested dependent upon the gender type of the product. The results indicate that feminine cues enhance perceived warmth which, in turn, increases purchase likelihood for masculine products. Perceived warmth serves as a mediator between the gender cue and purchasing likelihood, yet competence does not. 
Project three builds upon and integrates the findings from project two by investigating the effect of gender cues in the presence of warmth and competence cues. Thereby, a theoretical framework is proposed which takes multiple warmth and competence cues into account. Subsequently, this theoretical framework is used to assess the effects of gender cues, as well as warmth and competence cues, on consumer perception of brands and their purchase intention. Consistent with the theoretical framework, this project explores that feminine cues enhance perceived brand warmth and purchase intention when paired with a high competence cue, yet backfires when paired with a low competence cue. In contrast, implicit masculine gender cues enhance perceived brand competence and purchase intention when paired with low competence cues yet backfire when combined with high competence cues. 
Overall, this dissertation proposes recommendations on how practitioners are able to effectively use gender cues (i.e., butterflies, bears, circles, squares, colors such as pink and blue) as part of gender stereotypes within a firm’s marketing efforts (i.e., background of print ads or on the product packaging) to achieve desired consumer brand perception and improve purchase likelihood.

year: 2013

title: Moving away from home: Some social consequences for Tūhoe migrating to the Waikato

authors: Nikora, Linda Waimarie

subjects: psychology

abstract: To better understand the social consequences of migration away from traditional iwi regions, Tūhoe researchers intensively interviewed 40 Tūhoe people who had moved to the Waikato. It was found that most missed whanau and the community and made regular visits back home. Participants reported utilizing extensive whanau links to set themselves up in the Waikato, and many joined the Tūhoe associations in the Waikato. Others who did not join reported liking the idea that Tūhoe were there if needed. Some participants felt stronger in their Tūhoe identity since moving, and most reported noticing changes occurring in themselves or those back home over this period (they felt more worldly but saw those back home as more insular). While they did not interact much with tangata whenua, or participate in tangata whenua events, many said that they had a better appreciation of the local Tainui and the Kīngitanga groups since migrating. Finally, most would like to return to their iwi region for employment if it were available but saw little chance of this happening, and most reported wanting to retire there. The policy implications of both these points are explored.

text: Moving away from home: Some social consequences for Tūhoe migrating to the Waikato To better understand the social consequences of migration away from traditional iwi regions, Tūhoe researchers intensively interviewed 40 Tūhoe people who had moved to the Waikato. It was found that most missed whanau and the community and made regular visits back home. Participants reported utilizing extensive whanau links to set themselves up in the Waikato, and many joined the Tūhoe associations in the Waikato. Others who did not join reported liking the idea that Tūhoe were there if needed. Some participants felt stronger in their Tūhoe identity since moving, and most reported noticing changes occurring in themselves or those back home over this period (they felt more worldly but saw those back home as more insular). While they did not interact much with tangata whenua, or participate in tangata whenua events, many said that they had a better appreciation of the local Tainui and the Kīngitanga groups since migrating. Finally, most would like to return to their iwi region for employment if it were available but saw little chance of this happening, and most reported wanting to retire there. The policy implications of both these points are explored.

year: 2004