83 Works

Data from: Leaf development and demography explain photosynthetic seasonality in Amazon evergreen forests

Jin Wu, Loren P. Albert, Aline P. Lopes, Natalia Restrepo-Coupe, Matthew Hayek, Kenia T. Wiedemann, Kaiyu Guan, Scott C. Stark, Bradley Christoffersen, Neill Prohaska, Julia V. Tavares, Suelen Marostica, Hideki Kobayashi, Mauricio L. Ferreira, Kleber Silva Campos, Rodrigo Da Silva, Paulo M. Brando, Dennis G. Dye, Travis E. Huxman, Alfredo R. Huete, Bruce W. Nelson & Scott R. Saleska
In evergreen tropical forests, the extent, magnitude, and controls on photosynthetic seasonality are poorly resolved and inadequately represented in Earth system models. Combining camera observations with ecosystem carbon dioxide fluxes at forests across rainfall gradients in Amazônia, we show that aggregate canopy phenology, not seasonality of climate drivers, is the primary cause of photosynthetic seasonality in these forests. Specifically, synchronization of new leaf growth with dry season litterfall shifts canopy composition toward younger, more light-use...

Dimethylsulfoniopropionate, superoxide dismutase and glutathione as stress response indicators in three corals under short-term hyposalinity stress

Stephanie G. Gardner, Daniel A. Nielsen, Olivier Laczka, Ronald Shimmon, Victor H. Beltran, Peter J. Ralph & Katherina Petrou
Corals are among the most active producers of dimethylsulfoniopropionate (DMSP), a key molecule in marine sulfur cycling, yet the specific physiological role of DMSP in corals remains elusive. Here, we examine the oxidative stress response of three coral species (Acropora millepora, Stylophora pistillata and Pocillopora damicornis) and explore the antioxidant role of DMSP and its breakdown products under short-term hyposalinity stress. Symbiont photosynthetic activity declined with hyposalinity exposure in all three reef-building corals. This corresponded...

Data from: The mayfly nymph Austrophlebioides pusillus Harker defies common osmoregulatory assumptions

Renee Dowse, Carolyn G. Palmer, Kasey Hills, Fraser Torpy & Ben J. Kefford
Osmoregulation is a key physiological function, critical for homeostasis. The basic physiological mechanisms of osmoregulation are thought to be well established. However, through a series of experiments exposing the freshwater mayfly nymph Austrophlebioides pusillus (Ephemeroptera) to increasing salinities, we present research that challenges the extent of current understanding of the relationship between osmoregulation and mortality. A. pusillus had modelled 96 h LC10, LC50 and LC99 of 2.4, 4.8 and 10 g l−1 added synthetic marine...

Data from: Landscape composition, configuration, and trophic interactions shape arthropod communities in rice agroecosystems

Christophe Dominik, Ralf Seppelt, Finbarr G. Horgan, Josef Settele & Tomáš Václavík
1. Increasing landscape heterogeneity of agroecosystems can enhance natural enemy populations and promote biological control. However, little is known about the multi-scale effects of landscape heterogeneity on arthropod communities in rice agroecosystems, especially in combination with trophic interactions. 2. We examined for the first time how landscape heterogeneity, measured by four independent metrics of landscape composition and configuration at three spatial scales, affected species abundance and species richness of rice arthropods within four functional groups...

Data from: Mapping phosphorus hotspots in Sydney’s organic wastes: a spatially-explicit inventory to facilitate urban phosphorus recycling

Genevieve S. Metson, Dana Cordell, Brad Ridoutt & Steve Mohr
Phosphorus is an essential element for food production whose main global sources are becoming scarce and expensive. Furthermore, losses of phosphorus throughout the food production chain can also cause serious aquatic pollution. Recycling urban organic waste resources high in phosphorus could simultaneously address scarcity concerns for agricultural producers who reply on phosphorus fertilisers, and waste managers seeking to divert waste from landfills to decrease environmental burdens. Recycling phosphorus back to agricultural lands however requires careful...

Data from: Resolving coral photoacclimation dynamics through coupled photophysiological and metabolomic profiling

Kathryn E. Lohr, Emma F. Camp, Unnikrishnan Kuzhiumparambil, Adrian Lutz, William Leggat, Joshua T. Patterson & David J. Suggett
Corals continuously adjust to short term variation in light availability on shallow reefs. Long-term light alterations can also occur due to natural and anthropogenic stressors, as well as management interventions such as coral transplantation. Although short term photophysiological responses are relatively well-understood in corals, little information is available regarding photoacclimation dynamics over weeks of altered light availability. We coupled photophysiology and metabolomic profiling to explore changes that accompany longer-term photoacclimation in a key Great Barrier...

Patent database for Australian listed companies

Le Ma, Nelson Ma, Anna Bedford & Kristina Vojvoda
Patent data is sourced from the Australian Government’s Intellectual Property Government Open Data (IPGOD) 2019 (https://data.gov.au/dataset/ds-dga-a4210de2-9cbb-4d43-848d-46138fefd271/details?q=patent%202019). Companies are identified as a recipient of a patent if their current or historical company names, or the names of their controlled subsidiaries are named as the patent applicant in IPGOD. The standardisation and matching process is conducted following Mann (2018) and Kogan et al. (2017a, 2017b). Patent applicant and company/subsidiary names are rigorously cleaned and standardised by removing...

Data from: A novel real-world ecotoxicological dataset of pelagic microbial community responses to wastewater

Jamie Ruprecht, William Glamore, Katie Dafforn, Franziska Wemheuer, Sally Crane, Josie Van Dorst, Emma Johnston, Simon Mitrovic, Ian Turner, Belinda Ferrari & Simone Birrer
Real-world observational datasets that record and quantify pressure-stressor-response linkages between effluent discharges and natural aquatic systems are rare. With global wastewater volumes increasing at unprecedented rates, it is urgent that the present dataset is available to provide the necessary information about microbial community structure and functioning. Field studies were performed at two time-points in the Austral summer. Single-species and microbial community whole effluent toxicity (WET) testing was performed at a complete range of effluent concentrations...

Popular Music and Parenting

Fiona Tweedie & Liz Giuffre

Subcellular view of host–microbiome nutrient exchange in sponges: insights into the ecological success of an early metazoan–microbe symbiosis

Meggie Hudspith, Laura Rix, Michelle Achlatis, Jeremy Bougoure, Paul Guagliardo, Peta L. Clode, Nicole S. Webster, Gerard Muyzer, Mathieu Pernice & Jasper M. De Goeij
Background: Sponges are increasingly recognised as key ecosystem engineers in many aquatic habitats. They play an important role in nutrient cycling due to their unrivalled capacity for processing both dissolved and particulate organic matter (DOM and POM) and the exceptional metabolic repertoire of their diverse and abundant microbial communities. Functional studies determining the role of host and microbiome in organic nutrient uptake and exchange, however, are limited. Therefore, we coupled pulse-chase isotopic tracer techniques with...

Additional file 1 of An examination of the association between marital status and prenatal mental disorders using linked health administrative data

Asres Bedaso, Jon Adams, Wenbo Peng, Fenglian Xu & David Sibbritt
Additional file 1.

Data from: Land colonisation by fish is associated with predictable changes in life history

Edward R. M. Platt, Ashley M. Fowler & Terry J. Ord
The colonisation of new environments is a central evolutionary process, yet why species make such transitions often remains unknown because of the difficulty in empirically investigating potential mechanisms. The most likely explanation for transitions to new environments is that doing so conveys survival benefits, either in the form of an ecological release or new ecological opportunity. Life history theory makes explicit predictions about how traits linked to survival and reproduction should change with shifts in...

Data from: Hotter nests produce hatchling lizards with lower thermal tolerance

Buddhi Dayananda, Brad R. Murray & Jonathan K. Webb
In many regions, the frequency and duration of summer heatwaves is predicted to increase in future. Hotter summers could result in higher temperatures inside lizard nests, potentially exposing embryos to thermally stressful conditions during development. Potentially, developmentally plastic shifts in thermal tolerance could allow lizards to adapt to climate warming. To determine how higher nest temperatures affect the thermal tolerance of hatchling geckos, we incubated eggs of the rock-dwelling velvet gecko, Amalosia lesueurii, at two...

Data from: Good parenting may not increase reproductive success under environmental extremes

Rebecca J. Fox, Megan L. Head & Iain Barber
For species exhibiting parental care, the way in which parents adjust care behaviour to compensate for environmental change potentially influences offspring survival and, ultimately, population viability. Using the three-spined stickleback (Gasterosteus aculeatus) – a species in which males provide parental care by building and tending a nest and fanning the eggs – we examined how low dissolved oxygen (DO) levels affect paternal care, embryo development and survival. While levels of nest tending were unaffected by...

Data from: Higher incubation temperatures produce long-lasting upward shifts in cold tolerance, but not heat tolerance, of hatchling geckos

Theja Abayarathna, Brad R Murray & Jonathan K Webb
Heatwaves are a regular occurrence in Australia, and are predicted to increase in intensity and duration in the future. These changes may elevate temperatures inside lizard nests, shortening the incubation period, so that hatchlings are more likely to emerge during heatwaves. Potentially, developmental plasticity or heat hardening could buffer hatchings from future warming. For example, higher incubation temperatures could shift critical thermal maxima upwards, enabling lizards to withstand higher temperatures. To investigate whether developmental plasticity...

Data from: Unusual but consistent latitudinal patterns in macroalgal habitats and their invertebrate communities across two countries

Hannah Lloyd, Juan Cruz-Motta, Tim Glasby, Pat Hutchings & Paul Gribben
Aim: The physical characteristics of biogenic habitats and environmental conditions are important determinants of biodiversity, yet their relative importance can change across spatial scales. We aimed to understand how relationships between the physical characteristics of macroalgal habitats and their invertebrate communities varied across spatial scales and whether general ecological patterns occurred across two countries. Location: 18 sites across the temperate east coasts of Australia (over 1,300 km) and New Zealand (over 1,000 km), with the...

Supplemental material from: Can transcranial direct current stimulation enhance post-stroke motor recovery? Development of a theoretical patient-tailored model

Brenton Hordacre, Alana McCambridge, Michael Ridding & Lynley Bradnam
New treatments that can facilitate neural repair and reduce persistent impairments have significant value in promoting recovery following stroke. One technique that has gained interest is transcranial direct current stimulation (tDCS) as early research suggested it could enhance plasticity and enable greater behavioral recovery. However, several studies have now identified substantial inter-subject variability in response to tDCS and clinical trials revealed insufficient evidence of treatment effectiveness. A possible explanation for the varied and negative findings...

Wing interference patterns of Chrysomya blowflies (Diptera: Calliphoridae)

Nathan Butterworth, Thomas White, Phillip Byrne & James Wallman
Wing interference patterns (WIPs) are stable structural colours displayed on insect wings which are only visible at specific viewing geometries and against certain backgrounds. These patterns are widespread among flies and wasps, and growing evidence suggests that they may function as species- and sex-specific mating cues in a range of taxa. As such, it is expected that WIPs should differ between species and show clear sexual dimorphisms. However, the true extent to which WIPs vary...

International Student Data 2012-2015: A private tertiary provider case study

Luz Stenberg
Data on international students from a private tertiary provider between 2012 and 2015 were collected and includes country of origin, gender, age, course and number of advance standing credited to predict student outcomes.

Water availability influences thermal safety margins for leaves

Alicia Cook, Neil Berry, Kirsty Milner & Andy Leigh
One application of plant physiological heat tolerance measurements is the assessment of vulnerability to increasing environmental temperatures under climatic change. A thermal safety margin, the difference between physiological tolerance and environmental temperature, is a common metric for the assessment of plant thermal vulnerability. However, there are biological and methodological aspects to consider when evaluating thermal vulnerability that have the potential to substantially alter assessments. Two such aspects include the leaf to air temperature relationship and...

Sublethal effects of a rapidly spreading native alga on a key herbivore

Jordi Boada, Daniel Bradley, Tim Glasby, William Gladstone & Paul Gribben
1. Multiple anthropogenic stressors are causing a global decline of foundation species including macrophytes often resulting in the expansion of functionally different more stressor-tolerant macrophytes. Previously subdominant species may experience further positive demographic feedbacks if they are exposed to weaker plant herbivore interactions, possibly via decreased palatability or being structurally different from the species they are replacing. However, the consequences of the spread of opportunistic macrophytes for the local distribution and life-history of herbivores is...

Mise en Abyme: Drawn intersections between image, body, and space

Armando Chant

A high-throughput assay for quantifying phenotypic traits of microalgae

Phoebe Argyle, Jana Hinners, Nathan G. Walworth, Sinead Collins, Naomi M. Levine & Martina A. Doblin
High-throughput methods for phenotyping microalgae are in demand across a variety of research and commercial purposes. Many microalgae can be readily cultivated in multi-well plates for experimental studies which can reduce overall costs, while measuring traits from low volume samples can reduce handling. Here we develop a high-throughput quantitative phenotypic assay (QPA) that can be used to phenotype microalgae grown in multi-well plates. The QPA integrates 10 low-volume, relatively high-throughput trait measurements (growth rate, cell...

Predator protection dampens the landscape of fear

Eamonn Wooster
Apex predators structure ecosystems by hunting mesopredators and herbivores. Their ecological influence is determined not only by the number of animals they kill, but also by how prey alter their behaviours to reduce risk. Predation risk is variable in space and time creating a landscape of fear. In Australia, dingoes hunt red foxes and suppress their populations. As both predators are commonly subjected to eradication programs, the question arises whether humans alter the risk dingoes...

Multivariate trait analysis reveals diatom plasticity constrained to a reduced set of biological axes

Phoebe Argyle, Nathan G. Walworth, Jana Hinners, Sinéad Collins, Naomi M. Levine & Martina A. Doblin
Trait-based approaches to phytoplankton ecology have gained traction in recent decades as phenotypic traits are incorporated into ecological and biogeochemical models. Here, we use high-throughput phenotyping to explore both intra- and interspecific constraints on trait combinations that are expressed in the cosmopolitan marine diatom genus Thalassiosira. We demonstrate that within Thalassiosira, phenotypic diversity cannot be predicted from genotypic diversity, and moreover, plasticity can create highly divergent phenotypes that are incongruent with taxonomic grouping. Significantly, multivariate...

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  • University of Technology Sydney
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