Macquarie University

There’s no place like home: butterflies stick to their burbs

Members of at least one species choose mates and egg sites based on where they were born, research reveals

Two American passionfruit butterflies, Heliconius charithonia, part of Dr Darrell Kemp’s research cohort.
Credit: Darrell Kemp.

Birthplace exerts a lifelong influence on butterflies as well as humans, new research reveals.

In a paper published in the journal Proceedings of the Royal Society B: Biological Sciences, Macquarie University ARC Future Fellow Associate Professor Darrell Kemp reveals that the American passionfruit butterfly, Heliconius charithonia, selects its mate and egg-laying site based on the species of plant that hosted its own egg.

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Blue Carbon Horizons team wins Eureka Prize for Environmental Research

Collaboration investigates the link between changing sea levels, global warming and the health of marine wetlands.

Blue Carbon Horizons Team Eureka Prizes 2019 © Salty Dingo 2019 CRG-7409

Carbon dioxide capture by coastal ecosystems operates in direct relation to the speed of sea level rise.

That was the conclusion of extensive research conducted by a team of scientists from Macquarie University, University of Wollongong and ANSTO – work that has now won the scientists the NSW Environment, Energy and Science (DPIE) Eureka Prize for Environmental Research.

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Pioneering collaboration between Indigenous communities and Macquarie wins Eureka Prize for STEM inclusion

The NISEP program has helped almost 1000 Indigenous school children enter leadership roles.

National Indigenous Science Education Program Eureka Prizes 2019 © Salty Dingo 2019 CRG-7382

The National Indigenous Science Education Program (NISEP), based at the Faculty of Science and Engineering at Sydney’s Macquarie University, won the inaugural the Eureka Prize for STEM Inclusion at the 2019 Australian Museum Eureka Prizes.

The awards were held in Sydney on Wednesday, August 28.

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A New Hope for Coral Reefs: Largest-Ever Study Unlocks Global Solution to Save Coral Communities

Scientists urge priority action on hundreds of surviving reefs.

Image credit: Jeremy Bishop

The majority of 2500 reefs surveyed in a major international exercise retain the coral species that give them their distinctive structure.

More than 80 marine scientists, including several from Australia, contributed to the study, which is published in the journal, Nature Ecology and Evolution.

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Antiseptic resistance in bacteria could lead to next-gen plastics

Australia-UK researchers identify ancient protein pumps that make bacteria tough to treat – but could be key to new green polymers

The molecular machinery used by bacteria to resist chemicals designed to kill them could also help produce precursors for a new generation of nylon and other polymers, according to new research by scientists from Australia and the UK.

“Resistance to artificial antiseptics appears to be a lucky accident for the bacteria, and it could also be useful for humans,” says Professor Ian Paulsen of Australia’s Macquarie University, one of the leaders of the research group.

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Using quantum dots and a smartphone to find killer bacteria

Australian scientists develop cheap and rapid way to identify antibiotic-resistant golden staph (MRSA).

Researchers Anwar Sunna (right) and Vinoth Kumar Rajendran with their smartphone-enabled MRSA detector.
Credit: Sunna Lab

A combination of off-the-shelf quantum dot nanotechnology and a smartphone camera soon could allow doctors to identify antibiotic-resistant bacteria in just 40 minutes, potentially saving patient lives.

Staphylococcus aureus (golden staph), is a common form of bacterium that causes serious and sometimes fatal conditions such as pneumonia and heart valve infections. Of particular concern is a strain that does not respond to methicillin, the antibiotic of first resort, and is known as methicillin-resistant S. aureus, or MRSA.

Recent reports estimate that 700 000 deaths globally could be attributed to antimicrobial resistance, such as methicillin-resistance. Rapid identification of MRSA is essential for effective treatment, but current methods make it a challenging process, even within well-equipped hospitals.

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Gender bending: baby turtles influence their own sex

Chinese-Australian research finds climate change good news, and solves an evolutionary mystery

Chinese Pond Turtle (Mauremys reevesii)
Image credit: Wikimedia Commons

Baby turtles influence their gender by moving around inside their eggs, research has revealed.

The idea that an embryo reptile can act in a way that affects its chances of developing as male or female has long been thought impossible, but findings by scientists from China and Australia have now provided clear proof of the process.

The research, published in the journal Current Biology, solves a long-standing evolutionary mystery – and offers hope that at least some species thought especially vulnerable to effects of climate change will prove more robust than thought.

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Baby blue-tongues are born smart

Australian research finds little lizards learn very quickly.

Young Australian eastern blue-tongue lizards (Tiliqua scincoides) are every bit as clever as adults, researchers have found.

Life is hard for baby blue-tongues. As soon as they are born, they are on their own, with neither parental support nor protection. Adults of the species can grow to 600 millimetres long and enjoy the benefits of thick scales and a powerful bite, but the young are much smaller and thus more vulnerable to predation.

And that means they have to box clever if they are to survive.

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Exiled moons may explain astronomical mysteries

Australian and South American researchers posit wandering “ploonets” as unseen actors in distant solar systems.

Moons ejected from orbits around gas giant exoplanets could explain several astronomical mysteries, an international team of astronomers suggests.

Researchers led by Mario Sucerquia, from the Universidad de Antioquia, Colombia, and Jaime Alvarado-Montes from Australia’s Macquarie University, modelled the likely behaviour of giant exomoons predicted to form around massive planets – and discovered that they would be expelled and sent packing.

Roughly 50% of these ejected moons would survive both the immediate expulsion and avoid any subsequent collision with the planet or the star, ending up as quasi-planets travelling around the host star, but in eccentric “Pluto-like” orbits.

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An island haven for frogs in a sea of extinctions

New Guinea is one of the only places in the world where frogs are safe from the species-destroying chytrid fungus. An international team of scientists has published a new paper that shows how to keep it that way, but they need help to carry out their plan.

The chytrid fungus has wiped out more than 90 frog species around the world, and it’s driving hundreds more towards extinction. New Guinea – the world’s largest tropical island, and home to 6% of all known frog species – is one of the last remaining refuges from the deadly infection.

A team of scientists led by researchers from Macquarie University and the University of New England in Australia think they know how to keep the island’s frogs safe, but they need support to establish a long-term program of monitoring and conservation.

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