title: Where there's smoke there's fire? Women's experiences of smoking and cessation during pregnancy

authors: Drewer, Amanda

subjects: smoking

abstract: Women who smoke during pregnancy have been identified by the New Zealand Ministry of Health as a priority group for cessation services. In addition to adverse pregnancy outcomes, the effects of cigarette exposure in utero are believed to have health implications throughout life for the developing foetus. The aim of this study was to investigate the factors that affect smoking and cessation during pregnancy.  Fifteen women who had quit, tried to quit, or continued to smoke through a recent pregnancy were interviewed using face-to-face semi-structured interviews. During analysis, several key findings became apparent. Smoking played a central role in the women’s lives both in and out of pregnancy. Women were fearful and concerned about the possible effects on their growing babies. Their concerns contributed to their feelings of guilt and other negative emotions, as did frustrations over not being able to quit, adverse pregnancy outcomes and their perceived failure to meet with social expectations. However, they also doubted their concerns as most had seen, or had had their own experiences of healthy babies being born to mothers who smoked. Nonetheless, their worries led to a range of behavioural changes including spontaneously quitting, adjusting their smoking, hiding their pregnancy to continue smoking, or hiding their smoking. Changing their smoking behaviours enabled women to avoid being judged which was raised in most interviews. In addition, the importance of the context in which women lived and socialised was highlighted, as were the women’s midwives. Healthcare professionals were often spoken about in relation to the mismatch between what women wanted regarding cessation and what they were supplied. A key finding was the range of smoking statuses women presented with. This contrasts with much of the other literature that usually defines women as smokers or quitters. The use of the label ‘smoker’ in society is a generalised term that obscures differences that are important for healthcare practitioners to recognise. As a result of this study, a tool that assesses a woman’s awareness of the risks from smoking in pregnancy and openness to talking about smoking cessation has been developed. The aim is to give maternity care providers a way to broach this sensitive subject in a way that is appropriate for their client.

text: Where there's smoke there's fire? Women's experiences of smoking and cessation during pregnancy Women who smoke during pregnancy have been identified by the New Zealand Ministry of Health as a priority group for cessation services. In addition to adverse pregnancy outcomes, the effects of cigarette exposure in utero are believed to have health implications throughout life for the developing foetus. The aim of this study was to investigate the factors that affect smoking and cessation during pregnancy.  Fifteen women who had quit, tried to quit, or continued to smoke through a recent pregnancy were interviewed using face-to-face semi-structured interviews. During analysis, several key findings became apparent. Smoking played a central role in the women’s lives both in and out of pregnancy. Women were fearful and concerned about the possible effects on their growing babies. Their concerns contributed to their feelings of guilt and other negative emotions, as did frustrations over not being able to quit, adverse pregnancy outcomes and their perceived failure to meet with social expectations. However, they also doubted their concerns as most had seen, or had had their own experiences of healthy babies being born to mothers who smoked. Nonetheless, their worries led to a range of behavioural changes including spontaneously quitting, adjusting their smoking, hiding their pregnancy to continue smoking, or hiding their smoking. Changing their smoking behaviours enabled women to avoid being judged which was raised in most interviews. In addition, the importance of the context in which women lived and socialised was highlighted, as were the women’s midwives. Healthcare professionals were often spoken about in relation to the mismatch between what women wanted regarding cessation and what they were supplied. A key finding was the range of smoking statuses women presented with. This contrasts with much of the other literature that usually defines women as smokers or quitters. The use of the label ‘smoker’ in society is a generalised term that obscures differences that are important for healthcare practitioners to recognise. As a result of this study, a tool that assesses a woman’s awareness of the risks from smoking in pregnancy and openness to talking about smoking cessation has been developed. The aim is to give maternity care providers a way to broach this sensitive subject in a way that is appropriate for their client.

year: 2014

title: Physiological responses of kiwifruit vines (Actinidia chinensis Planch. var. chinensis) to trunk girdling and root pruning

authors: Black, Marykate Z.

subjects: Actinidia chinensis

abstract: Hydraulic conductance and photosynthesis were measured in kiwifruit (Actinidia sp.) vines to observe responses to the horticultural practices of trunk girdling and root pruning. Little is understood regarding the physiological effects of these practices in kiwifruit. Combined reductions in hydraulic conductance and photosynthesis were expected following root pruning. The primary response to trunk girdling was expected to be photosynthetic. Measurements of transpiration and xylem pressure potentials (Ψ) were used to calculate hydraulic conductance (K). Stomatal conductance (g s) and photosynthesis (A) were measured periodically. Neither treatment affected fruit growth. The response to root pruning was primarily hydraulic with significant reductions in midday Ψ indicating reduced K; reductions in A and g s were small. Girdling resulted in significant reductions in g s and A, with little effect on Ψ or K. Reduced A following girdling was considered to be a consequence of stomatal and biochemical limitation, with biochemical down-regulation following reduced carbohydrate demand.

text: Physiological responses of kiwifruit vines (Actinidia chinensis Planch. var. chinensis) to trunk girdling and root pruning Hydraulic conductance and photosynthesis were measured in kiwifruit (Actinidia sp.) vines to observe responses to the horticultural practices of trunk girdling and root pruning. Little is understood regarding the physiological effects of these practices in kiwifruit. Combined reductions in hydraulic conductance and photosynthesis were expected following root pruning. The primary response to trunk girdling was expected to be photosynthetic. Measurements of transpiration and xylem pressure potentials (Ψ) were used to calculate hydraulic conductance (K). Stomatal conductance (g s) and photosynthesis (A) were measured periodically. Neither treatment affected fruit growth. The response to root pruning was primarily hydraulic with significant reductions in midday Ψ indicating reduced K; reductions in A and g s were small. Girdling resulted in significant reductions in g s and A, with little effect on Ψ or K. Reduced A following girdling was considered to be a consequence of stomatal and biochemical limitation, with biochemical down-regulation following reduced carbohydrate demand.

year: 2012

title: Toitu Te Moananui a Toi – The Effects of the MV Rena on the Water Quality, Chemistry and Zooplankton of Otaiti (Astrolabe Reef)

authors: Dempsey, Te Puea Toni

subjects: metal contamination

abstract: Humans have had a profound effect on the world’s oceans, particularly through pollution. Marine pollution incidents are particularly important and increasingly involve both petrochemical and metal contamination. The effects of complex high level, point source pollution events such as ship wrecks on larval recruitment to reef environments is not well understood. Larval settlement is heavily influenced by chemical cues, hence pollution events could have a long term influence on reef ecology, and the likelihood that planktonic zooplankton can entrain contaminants into the reef food web is also of concern.
This thesis aims to address concerns from local Tangata Whenua, government, researchers, stakeholders and the public about the long term recovery of Otaiti following the MV Rena shipwreck and subsequent reef contamination. The incident is a complex one involving metallic container debris contamination along with oil. Research focussed on assessing the effects of water borne contamination surrounding the wreck site in order to examine acute and chronic responses of planktonic invertebrates: (1) the influence of Rena and associated debris to the chemistry and quality of water in the benthic zone around the wreck, (2) the toxicity of contaminants to survivorship of zooplankton, and (3) the influence on contaminant plumes to zooplankton recruitment behaviour of Otaiti.
There is a clear effect from the Rena and its associated debris field on the water quality and chemistry of Otaiti. Aluminium and copper for example, were consistently elevated in dissolved and total metal concentrations around the debris field. Laboratory based exposure of zooplankton to realistic concentration gradients of Rena contaminated sediments resulted in increased mortality with increased contaminant concentrations. Behavioural responses of pelagic and settling invertebrates to Rena pollution influenced sediment highlighted sensitivity to associated contaminant plumes. This could have significant ecological implications to the recruitment behaviour of other planktonic organisms that rely on reef conspecifics and chemical cues to initiate settlement.
Ecological concepts such as ecosystem function and biodiversity dynamics (including recruitment) relate the life force and longevity of a system. Key concerns within the scope of this research were highlighted that may have implications to Tangata Whenua decision making in assessing the Mauri of Otaiti. It can be implied that the Rena continues to impact the Mauri of Otaiti due to the presence of contaminants within the debris field.

text: Toitu Te Moananui a Toi – The Effects of the MV Rena on the Water Quality, Chemistry and Zooplankton of Otaiti (Astrolabe Reef) Humans have had a profound effect on the world’s oceans, particularly through pollution. Marine pollution incidents are particularly important and increasingly involve both petrochemical and metal contamination. The effects of complex high level, point source pollution events such as ship wrecks on larval recruitment to reef environments is not well understood. Larval settlement is heavily influenced by chemical cues, hence pollution events could have a long term influence on reef ecology, and the likelihood that planktonic zooplankton can entrain contaminants into the reef food web is also of concern.
This thesis aims to address concerns from local Tangata Whenua, government, researchers, stakeholders and the public about the long term recovery of Otaiti following the MV Rena shipwreck and subsequent reef contamination. The incident is a complex one involving metallic container debris contamination along with oil. Research focussed on assessing the effects of water borne contamination surrounding the wreck site in order to examine acute and chronic responses of planktonic invertebrates: (1) the influence of Rena and associated debris to the chemistry and quality of water in the benthic zone around the wreck, (2) the toxicity of contaminants to survivorship of zooplankton, and (3) the influence on contaminant plumes to zooplankton recruitment behaviour of Otaiti.
There is a clear effect from the Rena and its associated debris field on the water quality and chemistry of Otaiti. Aluminium and copper for example, were consistently elevated in dissolved and total metal concentrations around the debris field. Laboratory based exposure of zooplankton to realistic concentration gradients of Rena contaminated sediments resulted in increased mortality with increased contaminant concentrations. Behavioural responses of pelagic and settling invertebrates to Rena pollution influenced sediment highlighted sensitivity to associated contaminant plumes. This could have significant ecological implications to the recruitment behaviour of other planktonic organisms that rely on reef conspecifics and chemical cues to initiate settlement.
Ecological concepts such as ecosystem function and biodiversity dynamics (including recruitment) relate the life force and longevity of a system. Key concerns within the scope of this research were highlighted that may have implications to Tangata Whenua decision making in assessing the Mauri of Otaiti. It can be implied that the Rena continues to impact the Mauri of Otaiti due to the presence of contaminants within the debris field.

year: 2015