Australian Sites Research Articles

Genomic Insights Into the Archaea Inhabiting an Australian Radioactive Legacy Site.

During the 1960s, small quantities of radioactive materials were co-disposed with chemical waste at the Little Forest Legacy Site (LFLS, Sydney, Australia). The microbial function and population dynamics in a waste trench during a rainfall event have been previously investigated revealing a broad abundance of candidate and potentially undescribed taxa in this iron-rich, radionuclide-contaminated environment. Applying genome-based metagenomic methods, we recovered 37 refined archaeal MAGs, mainly from undescribed DPANN Archaea lineages without standing in nomenclature and ‘Candidatus Methanoperedenaceae’ (ANME-2D). Within the undescribed DPANN, the newly proposed orders ‘Ca. Gugararchaeales’, ‘Ca. Burarchaeales’ and ‘Ca. Anstonellales’, constitute distinct lineages with a more comprehensive central metabolism and anabolic capabilities within the ‘Ca. Micrarchaeota’ phylum compared to most other DPANN. The analysis of new and extant ‘Ca. Methanoperedens spp.’ MAGs suggests metal ions as the ancestral electron acceptors during the anaerobic oxidation of methane while the respiration of nitrate/nitrite via molybdopterin oxidoreductases would have been a secondary acquisition. The presence of genes for the biosynthesis of polyhydroxyalkanoates in most ‘Ca. Methanoperedens’ also appears to be a widespread characteristic of the genus for carbon accumulation. This work expands our knowledge about the roles of the Archaea at the LFLS, especially, DPANN Archaea and ‘Ca. Methanoperedens’, while exploring their diversity, uniqueness, potential role in elemental cycling, and evolutionary history.

National predictors of influenza vaccine uptake in pregnancy: the FluMum prospective cohort study, Australia, 2012–2015

ObjectiveAscertain predictors of inactivated influenza vaccine (IIV) uptake in pregnancy in mother–infant pairs from six Australian sites over four consecutive influenza seasons (2012–2015). MethodsProspective observational cohort study calculating proportions of unvaccinated and vaccinated pregnancies. Multivariable logistic regression calculating adjusted odds ratios (aOR) and 95% confidence intervals (95%CI) to determine demographic, pregnancy and birth characteristics as predictors of IIV uptake in pregnancy. ResultsUptake of IIV was 36% (n=3,651/9,878) with only 3–4% during the first trimester. Validation of IIV receipt was obtained for 77% of vaccinated participants. Predictors of IIV uptake in pregnancy were: healthcare provider recommendation to have IIV during pregnancy (aOR 7.04 [95%CI 5.83‐8.50]): GP (aOR 4.12 [95%CI 3.43‐4.98]), obstetrician (aOR 4.41 [95%CI 3.45‐5.64]), midwife (aOR 1.88 [95%CI 1.51‐2.36]); previous IIV within 12 months of their current pregnancy (aOR 2.87 [95%CI 2.36‐3.50]); and pertussis vaccination during the current pregnancy (aOR 4.88 [95%CI 4.08‐5.83]). Conclusions and implications for public healthHealthcare provider discussions with pregnant women about the risks associated with influenza infection during pregnancy and early infancy and evidence about the safety and effectiveness of IIV are required. Recommending and offering IIV in pregnancy needs to be included in these discussions to improve uptake.

Alexander William Robert Bevan, July 25, 1951–February 11, 2021

Alexander William Robert Bevan, July 25, 1951–February 11, 2021

The risk of being researched: Re-envisioning educator research participation for high-quality early childhood education

The participation of educators in research contributes to understanding and developing high-quality early childhood education. Consequently, increasing educator participation in research is beneficial. To increase educator research participation, it is important to understand educators’ experiences of research. This article draws on findings from a qualitative multisite case study that explored educators risk-taking in early childhood education. Data were collected by observing and interviewing 55 educators from three Australian early childhood education sites. Findings discussed in this article show that for educators in the study, participation in the research felt both beneficial and risky. Educators found research participation beneficial for learning and professional development, and some educators found participation risky because of uncertainty and fear associated with participation in the research. Based on these findings, two strategies are suggested to increase educator research participation: 1) Reviewing the conditions for educator research participation and 2) The normalisation of educator research participation. Findings provide useful insight for the early childhood education community in strengthening educator participation in research. Insights have implications for both researchers and those delivering teacher education programs.

AUSTRALIA’S BIG GAMBLE: THE NEWS MEDIA BARGAINING CODE AND THE RESPONSES FROM GOOGLE AND FACEBOOK

Responding rapidly to extraordinary developments in early 2021, this panel examines the background, development, implementation, and consequences of the latest Australian regulatory intervention in the engagement between content platforms and domestic media organisations: the News Media Bargaining Code (NMBC). The Australian federal government envisioned the NMBC as “a mandatory code of conduct to address bargaining power imbalances between Australian news media businesses and digital platforms, specifically Google and Facebook”; following a period of consultation that saw substantial public relations campaigning from Google, Facebook, and other content platforms to question the aims and effectiveness of the proposed code, the NMBC bill was sent to federal Parliament in December 2020. Google and Facebook both threatened to remove their services from Australia, or remove Australian news content from their platforms, if the NMBC passed in its original form. Such threats were regarded by some of the NMBC’s proponents as blatant attempts at “bullying” the Australian government to water down the Code, and in pushing ahead with the debate of the NMBC bill in the Australian Parliament the government essentially sought to call the platforms’ bluff – yet in the morning of 18 February 2021, Facebook followed through on its threats and both removed all content from the Facebook pages of Australian news outlets (and from those of other actors mistakenly classified as providing news), and banned any domestic or international users from publishing or accessing any posts that contained links to Australian news sites. The ban remained in force until 26 February, when urgent negotiations between Facebook and the Australian federal government produced a preliminary solution to the crisis. The Code finally became law on 2 March 2021. This panel reviews these turbulent developments. In combination, the four papers on this panel present a comprehensive and multifaceted picture of the News Media Bargaining Code, its context, and implications.

Between destruction and protection: the case of the Australian rock art sites

Can heritage be practiced and thought outside the binary of exaltation vs. denigration? To answer this question posed by the editors, this paper will analyse the destruction and protection of Indigenous heritage sites in Australia, where the destruction of significant cultural heritage sites, mainly Indigenous heritage sites, is the result of biased and outdated practice of cultural heritage that divides Indigenous heritage (prior 1788) from Australian heritage (after 1788). This rift has caused an immense damage to Indigenous heritage around the country as it shows how in Australia heritage is practiced and thought outside the dualism of celebration versus destruction. In this paper, I will show how the destruction of Indigenous rock art sites has been a constant in the 20th and 21st century and how this destruction has been framed in media as a result of vandalism. By arguing that this framing is perpetuating the dualism of celebration versus destruction, I suggest that we can move out of this binary by considering the concept of iconoclasm to go beyond this dualism.

AGITG MASTERPLAN: a randomised phase II study of modified FOLFIRINOX alone or in combination with stereotactic body radiotherapy for patients with high-risk and locally advanced pancreatic cancer

BackgroundAmong patients with non-metastatic pancreatic cancer, 80% have high-risk, borderline resectable or locally advanced cancer, with a 5-year overall survival of 12%. MASTERPLAN evaluates the safety and activity of stereotactic body radiotherapy (SBRT) in addition to chemotherapy in these patients.Methods and designMASTERPLAN is a multi-centre randomised phase II trial of 120 patients with histologically confirmed potentially operable pancreatic cancer (POPC) or inoperable pancreatic cancer (IPC). POPC includes patients with borderline resectable or high-risk tumours; IPC is defined as locally advanced or medically inoperable pancreatic cancer. Randomisation is 2:1 to chemotherapy + SBRT (investigational arm) or chemotherapy alone (control arm) by minimisation and stratified by patient cohort (POPC v IPC), planned induction chemotherapy and institution. Chemotherapy can have been commenced ≤28 days prior to randomisation. Both arms receive 6 × 2 weekly cycles of modified FOLFIRINOX (oxaliplatin (85 mg/m2 IV), irinotecan (150 mg/m2), 5-fluorouracil (2400 mg/m2 CIV), leucovorin (50 mg IV bolus)) plus SBRT in the investigational arm. Gemcitabine+nab-paclitaxel is permitted for patients unsuitable for mFOLFIRINOX. SBRT is 40Gy in five fractions with planning quality assurance to occur in real time. Following initial chemotherapy ± SBRT, resectability will be evaluated. For resected patients, adjuvant chemotherapy is six cycles of mFOLFIRINOX. Where gemcitabine+nab-paclitaxel was used initially, the adjuvant treatment is 12 weeks of gemcitabine and capecitabine or mFOLFIRINOX. Unresectable or medically inoperable patients with stable/responding disease will continue with a further six cycles of mFOLFIRINOX or three cycles of gemcitabine+nab-paclitaxel, whatever was used initially. The primary endpoint is 12-month locoregional control. Secondary endpoints are safety, surgical morbidity and mortality, radiological response rates, progression-free survival, pathological response rates, surgical resection rates, R0 resection rate, quality of life, deterioration-free survival and overall survival. Tertiary/correlative objectives are radiological measures of nutrition and sarcopenia, and serial tissue, blood and microbiome samples to be assessed for associations between clinical endpoints and potential predictive/prognostic biomarkers. Interim analysis will review rates of locoregional recurrence, distant failure and death after 40 patients complete 12 months follow-up. Fifteen Australian and New Zealand sites will recruit over a 4-year period, with minimum follow-up period of 12 months.DiscussionMASTERPLAN evaluates SBRT in both resectable and unresectable patients with pancreatic ductal adenocarcinoma.Trial registrationAustralia New Zealand Clinical Trials Registry ACTRN12619000409178, 13/03/2019.Protocol version: 2.0, 19 May 2019

The role of aerodynamic resistance in thermal remote sensing-based evapotranspiration models

Aerodynamic resistance (hereafter ra) is a preeminent variable in evapotranspiration (ET) modelling. The accurate quantification of ra plays a pivotal role in determining the performance and consistency of thermal remote sensing-based surface energy balance (SEB) models for estimating ET at local to regional scales. Atmospheric stability links ra with land surface temperature (LST) and the representation of their interactions in the SEB models determines the accuracy of ET estimates.The present study investigates the influence of ra and its relation to LST uncertainties on the performance of three structurally different SEB models. It used data from nine Australian OzFlux eddy covariance sites of contrasting aridity in conjunction with MODIS Terra and Aqua LST and leaf area index (LAI) products. Simulations of the sensible heat flux (H) and the latent heat flux (LE, the energy equivalent of ET in W/m2) from the SPARSE (Soil Plant Atmosphere and Remote Sensing Evapotranspiration), SEBS (Surface Energy Balance System) and STIC (Surface Temperature Initiated Closure) models forced with MODIS LST, LAI, and in-situ meteorological datasets were evaluated against flux observations in water-limited (arid and semi-arid) and energy-limited (mesic) ecosystems from 2011 to 2019.Our results revealed an overestimation tendency of instantaneous LE by all three models in the water-limited shrubland, woodland and grassland ecosystems by up to 50% on average, which was caused by an underestimation of H. Overestimation of LE was associated with discrepancies in ra retrievals under conditions of high atmospheric instability, during which uncertainties in LST (expressed as the difference between MODIS LST and in-situ LST) apparently played a minor role. On the other hand, a positive difference in LST coincided with low ra (high wind speeds) and caused a slight underestimation of LE at the water-limited sites. The impact of ra on the LE residual error was found to be of the same magnitude as the influence of LST uncertainties in the semi-arid ecosystems as indicated by variable importance in projection (VIP) coefficients from partial least squares regression above unity. In contrast, our results for the mesic forest ecosystems indicated minor dependency on ra for modelling LE (VIP < 0.4), which was due to a higher roughness length and lower LST resulting in the dominance of mechanically generated turbulence, thereby diminishing the importance of buoyancy production for the determination of ra.

Measuring cancer care experiences of Aboriginal and Torres Strait Islander people in Australia: Trial of a new approach that privileges patient voices

This study examined a new method for measuring the care experiences of Aboriginal and Torres Strait Islander people with cancer: the Indigenous People’s Experiences of Cancer Care Survey (IPECCS). The study assessed IPECCS’s: 1) performance; 2) ability to elicit information useful for service improvements; and 3) implementation potential. Three participant groups were recruited from five Australian cancer treatment sites: 1) Aboriginal and Torres Strait Islander people with cancer (+/- support person); 2) interviewers; and 3) health services staff. Trained interviewers administered IPECCS to participants with cancer in audiotaped sessions. Paper forms and transcripts were compared to assess performance, and problems/potential solutions reported by participants with cancer were assessed for actionability. All participant groups completed separate interviews regarding IPECCS. Selected implementation measures were assessed based on interviews and IPECCS administration. Participants (n=31) included 11 Aboriginal people with cancer, 7 support people, 4 interviewers, and 9 health staff. Aboriginal people with cancer spoke at length about their cancer care experiences and identified problems and potential solutions that could be acted upon by health services. Although some parts of the IPECCS form were well-completed, recording was inconsistent and inadequate. Aboriginal people with cancer and interviewers predominantly supported the IPECCS process; while most health staff supported the aims, they questioned its feasibility. Capturing domains of patient experience relevant to Aboriginal and Torres Strait Islander people requires a culturally safe, strengths-based approach. The tension between facilitating meaningful patient engagement and maximizing the efficiency of data collection and use must be resolved to realise the benefits of such an approach. Experience Framework This article is associated with the Policy & Measurement lens of The Beryl Institute Experience Framework. (https://www.theberylinstitute.org/ExperienceFramework). Access other PXJ articles related to this lens. Access other resources related to this lens.

Constructive Messages in Australian Domestic Violence Online News Coverage and Guidelines for Improved Coverage

ABSTRACT This article focusses on the Australian online news’ effectiveness to set the agenda for disseminating constructive messages. It explores obstacles reporters and editors encounter when covering a sensitive issue like domestic violence for the online news platform. By drawing on information from 2324 domestic violence articles in three most-accessed Australian online news sites, and interviews with 12 reporters and editors, this article details how these challenges are best overcome. Content analysis and interview results indicate reporters and editors have made efforts to increase constructive coverage, which continues to remain episodic and lacks meaningful context that helps tackle social factors leading to the abuse. Because much of the domestic violence reporting focusses on murders, reporters and editors are restricted by legal guidelines as to how much context and detail they can provide. Through eight specific guidelines, this study provides insights into how the obstacles can be overcome to improve the coverage. It suggests future research areas which could investigate how a more constructive reportage cognisant of victims’ suffering could be achieved.

Transition experiences of newly qualified registered graduate nurses employed in a Neonatal Intensive Care Unit

ObjectiveTo explore the experiences of newly qualified registered graduate nurses’ clinical and professional learning experiences, during their first six-months of post registration employment within a graduate nurse transition program in a Neonatal Intensive Care Unit (NICU). MethodNarrative inquiry with thematic analysis was used to explore the newly qualified registered graduate nurses’ accounts via semi-structured interviews, conducted between January 2018 – January 2019, of their clinical and professional learning during their employment in the Neonatal Intensive Care Unit. SettingIn total, eight newly qualified registered graduate nurses employed at two Western Australian Hospitals sites were recruited. FindingsThemes identified included: feeling unprepared; experiences of horizontal violence; the need for a supportive structural environment and seeking feedback. Participants reported overwhelming feelings of stress, emotional exhaustion, concerns for patient safety and for some, fear of early career burnout. ConclusionIn this study, newly qualified registered graduate nurses were clinically underprepared for entering a Neonatal Intensive Care Unit with all participants reporting high levels of psychosocial distress. This was further compounded by a lack of structured support, horizontal violence, and inadequate or no regular feedback from preceptors, resulting from a negative workplace culture and poor educator behaviours. Recommendations for improving the experiences of newly qualified registered graduate nurses employed in the Neonatal Intensive Care are discussed.

Patterns of drinking in Aboriginal and Torres Strait Islander peoples as self‐reported on the Grog Survey App: A representative urban and remote sample

Measuring self-reported alcohol use is challenging in any population, including when episodic drinking may be common. Drinking among Indigenous Australians has been shown to vary greatly within and between communities. However, most survey methods assume 'regular' patterns of drinking. National estimates have also been shown to underestimate alcohol use among this group. This paper describes drinking patterns in two representative community samples (urban and remote). Indigenous Australians (aged 16+ years) in two South Australian sites were recruited to complete the Grog Survey App. The App is a validated, interactive tablet-based survey tool, designed to help Indigenous Australians describe their drinking. Drinking patterns were described using medians and interquartile ranges; gender and remoteness were compared using Wilcoxon rank-sum tests. Spearman correlations explored the relationship between drinking patterns and age. Logistic regressions tested if beverage or container preference differed by remoteness or gender. Three-quarters of participants (77.0%, n=597/775) were current drinkers. Median standard drinks per occasion was 7.8 (78 g), 1.3 drinking occasions per month (median). Three-quarters of current drinkers (73.7%) reported a period without drinking (median: 60 days). Remote drinkers were more likely to drink beer. Improvised containers were used by 40.5% of drinkers. Episodic drinking with extended 'dry' periods and from non-standard drinking containers was common in this representative sample of Indigenous Australians. The diversity of container use and beverage preference, by gender and remoteness, illustrates nuances in drinking patterns between communities. It shows the importance of community-level data to inform local strategies addressing alcohol misuse.

The Collaboration for Increasing Influenza Vaccination in Children (CIIVIC): a meeting report

The Collaboration for Increasing Influenza Vaccination in Children (CIIVIC): a meeting report

Identifying marsupials from Australian archaeological sites: current methodological challenges and opportunities in zooarchaeological practice

AbstractWe review current zooarchaeological practice in Australia, identifying major research themes and key methodological gaps where opportunities exist for the development of Australian zooarchaeology as a discipline. We demonstrate that marsupial remains form a significant component of Australian zooarchaeological assemblages, yet high resolution taxonomic identification of these remains continues to prove challenging, owing to a combination of high species diversity and few resources which provide diagnostic criteria for discriminating morphologically similar, but ecologically variable taxa. The lack of robust protocols for discriminating marsupial taxa significantly impacts our ability to effectively integrate zooarchaeological data into broader narratives of Aboriginal colonisation, resilience and adaptation across Australia. Publication of identification protocols would help refine and standardise diagnostic criteria used between analysts, improve the methodological transparency of zooarchaeological analysis and provide resources for the training of a new generation of specialists. A range of opportunities currently exist, utilising qualitative and quantitative techniques, to significantly contribute towards the methodological robustness of zooarchaeological practice in Australia.

Insights from long-term shorebird monitoring for tracking change in ecological character of Australasian Ramsar sites

The Ramsar Convention is the centrepiece of international efforts for wetland conservation, aiming to maintain the ecological character of wetlands through holistic ecosystem management. Here, we review studies on shorebird populations at individual Australasian Ramsar sites and compare these against original listings under Criterion 6 to determine if there have been potential changes in ecological character. One to 12 migratory shorebird species have declined at four New Zealand and 18 Australian Ramsar sites over a 12 to 36-year period, resulting in 22 species (at 13 sites) no longer reaching Criterion 6 thresholds for Ramsar designation. In addition, 10 species at six Australian sites had exceeded the Limits of Acceptable Change. Despite these concerning results, there were remarkably few published site-based determinations of listed shorebird species' trends (and even fewer that were ≤5 years old). This is especially surprising since shorebird populations are regularly monitored at 27 out of 35 Australasian Ramsar sites (listed on the basis of one or more shorebird species). Thus, despite the volume of data available for analysis, long-term shorebird monitoring provides only limited insights about Ramsar ecological character. The value of these data would be greatly enhanced through complementary monitoring of other ecological characters at sites, particularly where shorebird populations provide early warning signs of potential deterioration. The main impediment to achieving a good understanding of how Ramsar sites are changing in Australasia appears to be a lack of analysis and centralised system for data and analytics, rather than a lack of monitoring data.

Multi-criteria evaluation of potential Australian tidal energy sites

Most tidal energy site studies concentrate on resource size; few examine other factors that may be of equal or even greater importance in determining site feasibility for tidal turbine array deployments. These factors include aspects such as electrical grid proximity, water depth, the location of marine protected areas, pre-existing users, environmentally significant regions and other restrictions. Using these factors, a more holistic approach to site selection was conducted for Australian waters using a Multi-Criteria Evaluation (MCE) process. This MCE method uses standardized factors combined with weighted linear combinations to calculate a site suitability index, where each factor is multiplied by a weight of relative importance. A sensitivity analysis on the factor weighting was performed to ensure the suitable selection of weighting factors to reduce conformation bias. The developed MCE model identified three promising locations in Australia, with contiguous areas in regions to the north of Broome Western Australia of 534 km2, the Banks Strait region northeast of Tasmania of 67 km2, and the Clarence Strait located in the Northern Territory of <1 km2 found. Additional examinations of possible co-location of tidal energy devices with wind and wave energy were examined.

Our journey, our story: a study protocol for the evaluation of a co-design framework to improve services for Aboriginal youth mental health and well-being.

IntroductionMainstream Australian mental health services are failing Aboriginal young people. Despite investing resources, improvements in well-being have not materialised. Culturally and age appropriate ways of working are needed to improve service access and responsiveness. This Aboriginal-led study brings Aboriginal Elders, young people and youth mental health service staff together to build relationships to co-design service models and evaluation tools. Currently, three Western Australian youth mental health services in the Perth metropolitan area and two regional services are working with local Elders and young people to improve their capacity for culturally and age appropriate services. Further Western Australian sites will be engaged as part of research translation.Methods and analysisRelationships ground the study, which utilises Indigenous methodologies and participatory action research. This involves Elders, young people and service staff as co-researchers and the application of a decolonising, strengths-based framework to create the conditions for engagement. It foregrounds experiential learning and Aboriginal ways of working to establish relationships and deepen non-Aboriginal co-researchers’ knowledge and understanding of local, place-based cultural practices. Once relationships are developed, co-design workshops occur at each site directed by local Elders and young people. Co-designed evaluation tools will assess any changes to community perceptions of youth mental health services and the enablers and barriers to service engagement.Ethics and disseminationThe study has approval from the Kimberley Aboriginal Health Planning Forum Kimberley Research Subcommittee, the Western Australian Aboriginal Health Ethics Committee, and the Curtin University Human Research Ethics Committee. Transferability of the outcomes across the youth mental health sector will be directed by the co-researchers and is supported through Aboriginal and non-Aboriginal organisations including youth mental health services, peak mental health bodies and consumer groups. Community reports and events, peer-reviewed journal articles, conference presentations and social and mainstream media will aid dissemination.

Alcohol Consumption in the Australian Mining Industry: The Role of Workplace, Social, and Individual Factors

Coal miners have been reported to have higher rates of risky/harmful alcohol misuse; however, it is not known if metalliferous mining employees whose working conditions differ in workplace practices, also have increased rates of risky/harmful alcohol misuse. This study aimed to examine alcohol consumption in a sample of Australian metalliferous mining workers and to examine the demographic and workplace factors associated with risky/harmful alcohol use. All employees from a convenience sample of four Australian mine sites were invited to complete a paper-based cross-sectional survey between June 2015 and May 2017. The survey contained questions relating to social networks, health behaviors, psychological distress, demographic characteristics, and risky/harmful drinking. Current alcohol use was measured by the Alcohol Use Disorders Identification Test (AUDIT), a validated measure of risky and/or harmful drinking. Factors associated with risky/harmful drinking were investigated using univariate and multivariable logistic regression. A total of 1,799 participants completed the survey (average site response rate 95%). Overall, 94.8% of males and 92.1% of females reported using alcohol in the preceding 12 months. The odds of risky/harmful alcohol use were significantly higher in those who were male, younger, and reported higher psychological distress. This study identified that metalliferous mining employees engage in at-risk levels of alcohol consumption significantly higher than the national average despite workplace policies and practices that restrict alcohol use. Personal and workplace risk factors that may help target specific employee groups and inform the development of tailored, integrated multicomponent intervention strategies for the industry were identified.

A multiple species, continent-wide, million-phenotype agronomic plant dataset

A critical shortage of ‘big’ agronomic data is placing an unnecessary constraint on the conduct of public agronomic research, imparting barriers to model development and testing. Here, we address this problem by providing a large non-relational database of agronomic trials, linked to intensive management and observational data, run under a unified experimental framework. The National Variety Trials (NVTs) represent a decade-long experimental trial network, conducted across thousands of Australian field sites using highly standardised randomised controlled designs. The NVTs contain over a million machine-measured phenotypic observations, aggregated from density-controlled populations containing hundreds of millions of plants and thousands of released plant varieties. These data are linked to hundreds of thousands of metadata observations including standardised soil tests, fertiliser and pesticide input data, crop rotation data, prior farm management practices, and in-field sensors. Finally, these data are linked to a suite of ground and remote sensing observations, arranged into interpolated daily- and ten-day aggregated time series, to capture the substantial diversity in vegetation and environmental patterns across the continent-spanning NVT network.

ENSO feedback drives variations in dieback at a marginal mangrove site

Ocean–atmosphere climatic interactions, such as those resulting from El Niño Southern Oscillation (ENSO) are known to influence sea level, sea surface temperature, air temperature, and rainfall in the western Pacific region, through to the north-west Australian Ningaloo coast. Mangroves are ecologically important refuges for biodiversity and a rich store of blue carbon. Locations such as the study site (Mangrove Bay, a World Heritage Site within Ningaloo Marine Park and Cape Range National Park) are at the aridity range-limit which means trees are small in stature, forests small in area, and are potentially susceptible to climate variability such as ENSO that brings lower sea level and higher temperature. Here we explore the relationship between mangrove dieback, and canopy condition with climatic variables and the Southern Oscillation Index (SOI)—a measure of ENSO intensity, through remote sensing classification of Landsat satellite missions across a 29 year period at a north-west Australian site. We find that the SOI, and seasonal mean minimum temperature are strongly correlated to mangrove green canopy (as indicator of live canopy) area. This understanding of climate variations and mangrove temporal heterogeneity (patterns of abundance and condition) highlights the sensitivity and dynamics of this mangrove forest and recommends further research in other arid and semi-arid tropical regions at mangrove range-limits to ascertain the extent of this relationship.