ORCID Profile
0000-0002-6262-2820
Current Organisation
University of Adelaide
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Publisher: Springer Science and Business Media LLC
Date: 20-01-2021
Publisher: Informa UK Limited
Date: 03-04-2022
Publisher: CSIRO Publishing
Date: 27-04-2023
DOI: 10.1071/BT22110
Abstract: Context The proportion of dioecious species can vary considerably among climates and habitats. However, studies often involve isolated communities or large erse areas and fail to capture how proportions vary across erse landscapes. Aims To identify (1) life-history associations of terrestrial dioecious plant species in central southern Australia, (2) whether proportion of dioecy varies spatially across central southern Australia, and (3) whether proportion of dioecy is correlated with life-history and/or climate factors. Methods Species growth form, pollination mechanisms and seed-dispersal features were extracted from herbarium databases to determine potential dioecy-linked traits. Distribution data for native terrestrial species in 66 Interim Biogeographical Regionalisation of Australia subregions were extracted from the Australasian Virtual Herbarium to calculate the proportion of total native species richness that are dioecious. Climate data for each subregion were also obtained from Terrestrial Ecology Research Network databases to investigate relationships among climate, life-history traits and dioecy. Key results Woodiness, abiotic pollination and endozoochory were more prevalent in dioecious than non-dioecious taxa. Proportion of dioecy ranged from 1.7% to 8.5% among subregions and correlated negatively with annual temperature range, January to March rainfall and precipitation seasonality and with average annual daily mean, minimum, maximum and average annual minimum temperature. The highest-ranked models of dioecy incorporated the additive effects of the relative proportion of woody species and either annual temperature ranges, January to March rainfall or average annual daily maximum temperature. Conclusions Dioecy was associated with woodiness, abiotic pollination and endozoochory, in line with studies of other flora, with the model of stable temperature range and woodiness being the highest-ranked model of dioecy. Implications Areas with higher proportions of dioecy can be targeted for future investigations into dioecious plant ecology to aid conservation and ecosystem management.
Publisher: Wiley
Date: 12-03-2021
DOI: 10.1002/JOCB.495
Abstract: World‐class science requires inspiration, so how can we spark creativity in the modern university environment? Creativity does not come automatically: in the modern age, factors from electronic devices to time pressure can stifle creative thought. Yet, to solve the major problems of the future, it will be essential to stimulate creativity in scientific research and teaching. Here, we bring together insights from the literature to offer ways to cultivate creativity in universities. We advocate for creativity at all levels of university culture within which students are embedded, from the students themselves, to teachers, to researchers, and to administrators. We found that, for students, creativity can involve accepting creative coursework and understanding failure for teachers, it can involve being active mentors and designing creative courses for researchers, it can involve conscious effort to make room for creative thought within pressured workloads, and researching across disciplines and for administrators, it can involve relaxing restraints, allowing autonomy over courses, and encouraging cross‐disciplinary learning and research.
Publisher: Informa UK Limited
Date: 02-11-2023
Publisher: CSIRO Publishing
Date: 2020
DOI: 10.1071/BT20006
Abstract: Dioecious plants constitute 7% of all angiosperm species, yet they occur in many habitat types, partially through the deployment of sexual dimorphisms that assist in reproduction. In the present work, the dioecious monocot Lomandra leucocephala ssp. robusta (Asparagaceae: Lomandroideae) was studied to understand how sexual dimorphisms can assist species conservation and inform us of a species’ potential significance in an ecosystem. Floral display was sexually dimorphic, as male inflorescences were displayed more prominently and more conspicuously in UV range. Male nectar analysed by thin-layer chromatography contained a higher glucose content than female nectar. However, both sexes contained hexose-rich nectar, a common indicator of generalist pollination, which was supported by observations of floral visitors. Floral extract comparison conducted via gas chromatography-mass spectrometry showed that male extracts contained more compounds that potentially convey greater resistance to biotic and abiotic threats. Chemical comparison of leaves by high performance liquid chromatography with peak area ratio analysis revealed this technique could be used as a tool for gender identification of in iduals during non-flowering periods. Due to the generalist pollination mechanisms of L. leucocephala ssp. robusta, may have an important role in the conservation and support of local insect populations. The presence of chemical biotic and abiotic resistance may also make L. leucocephala ssp. robusta a significant contributor to the ongoing stabilisation of the sand dunes. Conservation efforts required for L. leucocephala ssp. robusta are likely to be minimal, as pollination services are provided by a ersity of pollinating taxa, including introduced species, which will be abundant regardless of variable flowering periods. Further observational study of L. leucocephala ssp. robusta pollinators and differences in pollinator visitation behaviours between sexes is recommended to better understand efficient pollination for the species, and potentially reveal a greater extent of ecosystem benefit for this species.
Publisher: CSIRO Publishing
Date: 06-07-2022
DOI: 10.1071/BT21112
Abstract: Dioecious-plant life-history characteristics and reproduction vary greatly among species, and have been linked to certain climate and habitat types, particularly tropical and island habitats. Australia is a large, predominantly arid continent, although it also contains mediterranean, temperate and tropical climates. Dioecious plants occupy each of these climate types, with their respective habitats and evolutionary pressures. As a result, dioecious species demonstrate great variation in key reproductive characteristics (pollination mechanism, sex ratio, and seed dispersal), which require understanding so as to conserve dioecious species effectively among climate types. Therefore, to understand dioecious-plant ecology across Australia, research must include all climate types, and investigate reproductive traits in each to better focus conservation strategies. An external factor which could prevent equal study effort across climate types would be geoclimatic preference of study location or biases in researcher interest, causing gaps in practical understanding and less effective dioecious-plant conservation management in understudied systems. To assess the prevalence and nature of dioecious plant research in Australia, we conducted a systematic mapping and scoping review to answer the following questions: (1) what climate zones have been captured by dioecious-plant research in Australia, focusing on pollination, sex ratio and seed dispersal and (2) what is the distribution of dioecious-plant pollination, sex ratio and seed dispersal research by climate type of the 43 studies that met the inclusion criteria, 27 (62.8%) studies were conducted in temperate climates, 8 (18.6%) in dry climates, 6 (13.9%) in tropical climates, and 5 (11.6%) in continental climates. Of the three focal areas, pollination studies (n = 24, 75% studies of entomophily) were most common, whereas sex ratio (n = 17, 41% studies of sex ratio over more than one population) and seed dispersal studies (n = 13, 54% of studies investigated abiotic dispersal) were less frequently researched. Considering the climate classification distribution in Australia, studies of dioecious species in dry climates are less prevalent than those in temperate climates. Of the focal areas of research, particularly under-investigated areas were anemophily, biotic seed dispersal, and study of female-biased species. Further studies addressing these gaps would be beneficial to inform conservation initiatives for Australian dioecious plant species. Additionally, it would be informative to investigate whether similar patterns are found in dioecious plant research in other countries with erse climate types.
Start Date: 2017
End Date: 2018
Funder: Department of Foreign Affairs and Trade
View Funded ActivityStart Date: 2021
End Date: 2022
Funder: Ecological Society of Australia
View Funded Activity