ORCID Profile
0000-0002-0360-0410
Current Organisations
Retired
,
University of Tasmania
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Publisher: Springer Science and Business Media LLC
Date: 31-03-2017
DOI: 10.1007/S10661-017-5916-4
Abstract: An unusual bloom of Chrysosporum ovalisporum (basionym Aphanizomenon ovalisporum) occurred for the first time in the Murray River and distributary rivers in New South Wales, Australia, from mid-February to early June 2016. At its greatest extent, it contaminated a combined river length of ca. 2360 km. Chrysosporum ovalisporum usually comprised >99% of the total bloom biovolume at most locations s led, which at times exceeded 40 mm
Publisher: Elsevier BV
Date: 05-2018
DOI: 10.1016/J.HAL.2018.04.004
Abstract: Cyanobacterial survival following their release in water from major headwaters reservoirs was compared in five New South Wales rivers. Under low flow conditions, cyanobacterial presence disappeared rapidly with distance downstream in the Cudgegong and Hunter Rivers, whereas the other three rivers were contaminated for at least 300 km. Cyanobacterial survival is likely to be impacted by the geomorphology of each river, especially the extent of gravel riffle reaches (cells striking rocks can destroy them) and by the different turbulent flow conditions it produces within each. Flow conditions at gauging stations were used to estimate the turbulent strain rate experienced by suspended cyanobacteria. These indicate average turbulent strain rates in the Cudgegong and Hunter Rivers can be above 33 and 83 s
Publisher: SAGE Publications
Date: 07-04-2022
DOI: 10.1177/08980101221088081
Abstract: Aim: The aims of this sequential explanatory mixed method study were twofold 1. Firstly, to evaluate the implementation of a spiritual care subject in a nursing program. 2. Secondly, to examine undergraduate nursing students’ perceptions of providing spiritual care within their holistic care practice. Background: Studies conducted internationally indicate many nurses feel inadequately prepared to provide holistic care inclusive of spiritual care due to insufficient spiritual care education. Design: Two phase, sequential explanatory mixed method design which comprised of a quantitative study followed by a qualitative study. Methods: The setting was an Australian faith-based university. Participants comprised of undergraduate nursing students who were enrolled in a spiritual care subject. Findings: Two study findings emerged: 1. Participants’ knowledge and practice of spiritual care were transformed by the spiritual care subject, and 2. The spiritual care subject broadened perceptions of spiritual care so participants viewed themselves more equipped to provide spiritual care in their holistic care provision. Conclusion: The spiritual care subject had an affirmative influence on participants’ perceptions of providing spiritual care within holistic care practice. The findings have implications for nurse educators to consider how spiritual care content can be included within undergraduate nursing curricula.
Publisher: Elsevier BV
Date: 11-2016
DOI: 10.1016/J.WATRES.2016.08.051
Abstract: A YSI EXO2 water quality sonde fitted with fluorometric sensors for chlorophyll-a (Chl-a) and phycocyanin (CPC) was used to determine its applicability in cyanobacterial quantification in three small urban ponds in Sydney, Australia displaying considerable variations in cyanobacterial community composition and abundance, as well as eukaryotic algae, turbidity and chromophoric dissolved organic matter. CPC and Chl-a measured in situ with the instrument was compared against laboratory measures of cyanobacterial biovolume over two summer s ling periods. A good correlation was found between CPC and total cyanobacterial biovolume in two of the three ponds. The poor correlation in the third was due to the frequent dominance of picoplanktonic sized cyanobacteria. CPC did not correlate well with cell counts, and Chl-a was a poor measure of cyanobacterial presence. The relationship between CPC measured by fluorometry varied according to the dominant cyanobacterial taxa present in the ponds at any one time. Fluorometry has good potential for use in environmental monitoring of cyanobacterial biovolume, but may need to be based on predetermined relations applicable to local water bodies. Management guidelines based on CPC concentrations would also enhance the usefulness of in situ CPC measurements.
Publisher: CSIRO Publishing
Date: 2018
DOI: 10.1071/MF18014
Abstract: A major bloom of Chrysosporum ovalisporum occurred in ~2360km of the Murray–Edward–Wakool River System, Australia, during the 2016 austral summer and autumn. Several potential causes were investigated. Although summer air temperatures were among the hottest on record, no significant relationships were found between meteorological factors and bloom abundance. Instead, a weak but significant relationship was found between surface water temperature and bloom abundance downstream of Lake Hume, because the hot weather is likely to have led to higher water temperatures promoting bloom development. Releases of cold water inflows into Lake Hume from its Murray River arm may have stimulated upwelling of nutrient-rich deeper water, promoting the establishment of the bloom in that lake. Total nitrogen and total phosphorus concentrations were within the mesoeutrophic range and significantly related to bloom abundance, although some nutrient would be contained within cyanobacterial cells. During peak bloom abundance, pH was above 8.5 at one site. One unusual feature was that the bloom occurred in very dilute water, at electrical conductivities of 40–50 µScm–1. However, this does not appear to have affected carbon uptake and photosynthesis at high pH. Further blooms may occur if similar hot summers occur in future.
Publisher: Elsevier BV
Date: 04-2018
DOI: 10.1016/J.HAL.2018.03.004
Abstract: The emerging toxin β-methylamino-l-alanine (BMAA) has been linked to the development of a number of neurodegenerative diseases in humans including amyotrophic lateral sclerosis (ALS), Alzheimer's disease, and Parkinson's disease. BMAA has been found to be produced by a range of cyanobacteria, diatoms, and dinoflagellates worldwide, and is present in freshwater, saltwater, and terrestrial ecosystems. Surface scum s les were collected from waterways in rural and urban New South Wales, Australia and algal species identified. Reverse phase liquid chromatography-tandem mass spectrometry was used to analyse sixteen cyanobacterial scum for the presence of BMAA as well as its toxic structural isomer 2,4-diaminobutyric acid (2,4-DAB). BMAA was detected in ten of the s les analysed, and 2,4-DAB in all sixteen. The presence of these toxins in water used for agriculture raises concerns for public health and food security in Australia.
No related grants have been discovered for Lee Bowling.