Feed aggregator

Dice Australia and AllGrid Energy are hosting a fund-raising event for Indigenous wellbeing and Suicide Prevention.

Seneca Rus, 25, was bitten by a suspected white pointer in surf in Ballina on Wednesday

The surfer attacked by a shark on the NSW north coast is worried the use of nets around beaches could hurt marine life.

Seneca Rus, 25, was bitten by a suspected white pointer on Wednesday at Sharpes beach in Ballina when surfing with his mates.

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Norton Rose Fulbright has advised Redback Technologies on the sale of a stake to major energy company EnergyAustralia

Swimming lessons are about to get a whole lot better for the children of St Lucy’s Primary School in Wahroonga.

Tesla’s first integrated retail store in Melbourne opens in Chadstone Shopping Centre’s new luxury offering today.

The Titan SmartStorage product was unveiled at the All-Energy 2016 conference in Melbourne, Australia, and is now available to order.

FOSSIL CLUES: Discovery of the oldest known bird voice box is shedding light on what sounds dinosaurs were capable of making - or not!

Penguin Bloom is the story of an Australian family who rescued a ‘a tiny, scruffy, injured’ magpie chick they called Penguin. In caring for the newest member of their family, the Blooms – including mother Sam, who was herself coming to terms with paralysis after an accident – found that Penguin helped them to heal emotionally. Their story went viral on Instagram and has now been turned into a book, royalties from which will go to Spinal Cure Australia and Wings For Life in the UK

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This cow has the right idea. Cow image from www.shutterstock.com

When Canadian farmer Joe Dorgan noticed about 11 years ago that cattle in a paddock by the sea were more productive than his other cows, he didn’t just rediscover an Ancient Greek and Icelandic practice.

While the Ancient Greeks didn’t have to contend with global warming, it turns out that this practice could significantly reduce greenhouse gas emissions from 21st-century livestock farming.

Cows and sheep produce methane, a greenhouse gas that is 28 times more powerful than carbon dioxide. Despite misconceptions, most cow methane comes from burps (90%) rather than farts (10%). Livestock produce the equivalent of 5% of human-generated greenhouse gases each year, or five times Australia’s total emissions.

From Canada to the world

Dorgan’s cattle were eating storm-tossed seaweed. Canadian researchers Rob Kinley and Alan Fredeen have since found that seaweed not only helped improve the cows’ health and growth, but also reduced their methane production by about 20%.

This and other lines of evidence led Kinley, who by then had moved to CSIRO, to team up with other CSIRO scientists and marine algae specialists at James Cook University to test a wide range of seaweeds.

They tested 20 seaweed species and found that they reduce methane production in test-tube samples from cow stomachs by anything from zero to 50%. But to do this required high amounts of seaweed (20% by weight of the sample) which was likely to present digestion issues for animals.

But when the researchers tested a particular type of seaweed collected from Queensland’s coastal waters, they thought their instruments were broken and ran the tests again. It turns out that Asparagopsis taxiformis reduces methane production by more than 99% in the lab. And unlike other seaweeds where the effect diminishes at low doses, this species works at doses of less than 2%.

Asparagopsis produces a compound called bromoform (CHBr₃), which prevents methane production by reacting with vitamin B12 at the last step. This disrupts the enzymes used by gut microbes that produce methane gas as waste during digestion.

Fighting climate change, feeding people

Globally, 1.3 billion people depend, partially or entirely, on livestock for their livelihoods. Livestock provides protein and micronutrients to many of the world’s 830 million people experiencing food insecurity.

Livestock methane production is not just an environmental problem. All this burped methane is wasted energy that could be going to make animals produce more food. Around 15% of feed expenses are lost in methane emissions. As feed is the primary expense for livestock farmers, this is no small problem.

It’s not just the cost, either. As wealthier consumers become more aware of environmental issues around agriculture, some are choosing to eat less meat.

If farmers could supplement their feed with seaweed, this might just help with two of the biggest challenges of our time: fighting climate change and growing more food with fewer resources.

In Australia, if we could develop a way to include seaweed feed in the Emissions Reduction Fund (as for dairy farmers), farmers might even be able to get carbon credits at the same time.

CSIRO and partners James Cook University, with funding from Meat and Livestock Australia, are currently conducting further experiments to examine how feeding seaweed to cattle affects production. These experiments aim to confirm the effects measured in the lab and in live sheep experiments. Confirmation through these experiments could create a new industry in growing seaweed as a feed supplement for livestock.

Where can we grow all the seaweed?

Seaweed production globally is booming, with more than 25 million tonnes (measured when wet) farmed each year, which is about double the global commercial production of lemons.

Producing enough Asparagopsis to feed 10% of the almost 1 million feedlot and 1.5 million dairy cattle in Australia would require about 300,000 tonnes a year, and millions of tonnes if it were to be scaled up globally.

With selection and breeding of seaweed varieties for higher bioactivity, this figure could come down, but perhaps only by half, and it would still require large areas of land and water. With typical seaweed production rates at 30-50 tonnes of dry matter per hectare, this suggests that to supply 10% of the Australian livestock industry will require at least 6,000 hectares of seaweed farms.

The booming seaweed industry is already aware of the pitfalls experienced in fish farming.

There are likely to be many indirect benefits, including creating alternative livelihoods in many developing countries where fishing may be in decline, and the use of seaweed as a means to filter detrimental nutrients from rivers or effluent from fish farms.

But seaweed farms more generally will be part of our increasing demands on the marine environment and will need to be part of integrated ecosystem wide management and marine spatial planning.

But for now, Joe Dorgan, of Seacow Pond in Prince Edward Island, Canada, will continue to feed seaweed to all of his cattle and reap the rewards of improved health and production.

Michael Battaglia works for CSIRO. CSIRO, MLA and JCU hold a patent of the use of Asparagopsis for methane reduction, and the partners are actively involved in seeking to commercialise the technology Funding to test and develop the use of Asparagopsis for animal feeding has been provided by the Australian Government under the National Livestock Methane Program, of Filling the Research Gaps.

Not your average starling. Nathan Rupert/Flickr, CC BY-NC-ND

Encountering a snake in the wild is many people’s worst nightmare. So imagine walking through the dense tropical forests of north Queensland and stumbling across an aggregation of 15 hungry snakes loitering beneath a giant canopy tree.

You’re probably wondering why the snakes are there? The answer is that the tree above is laden with hundreds (sometimes thousands) of bird nests; a colony of metallic starlings (Aplonis metallica).

And it’s not just snakes. For the past three years I have been studying these colonies as part of a PhD program at the University of Sydney. Our paper describing this remarkable ecological phenomenon has just been published in PLoS ONE.

In a single year, I recorded more than 100,000 animals (representing 42 species) beneath starling colony trees.

Annual bonanza

These aggregations are tiny (with an average of 140 square metres). They therefore represent one of the most dense and species-rich animal groupings on Earth. Many of the species encountered beneath the starling colonies are 1,000 times more abundant there than beneath otherwise similar trees in the surrounding landscape.

The hosts of this annual animal extravaganza are small, glossy-black birds with bright red eyes (the metallic starlings). In reality, we know little about them.

Existing literature suggests they migrate to northern Queensland from New Guinea each year, although it is possible that some stay in Australia year-round. The starlings begin nesting in November, and we think they raise three broods of young before nesting ceases at the beginning of April. Starlings return to the same trees every year (I know of one tree active for at least 15 years), and the trees they use are remarkably unique.

Most trees used by starlings are poison-dart trees (Antiaris toxicaria; the same species Asian peoples used to dip the tips of their poison darts). The significance of the tree’s toxicity to the starlings is unknown, but they are tall (emergent from the surrounding canopy), with smooth bark, and are isolated from nearby vegetation.

Through climbing experiments, we found that starlings likely actively seek out these trees to minimise nest predation by snakes (in most cases, snakes cannot climb the tree trunks).

The area directly beneath the colonies is similarly unique. The ground is covered by seeds and guano dropped by the thousands of starlings above, and the smell is extraordinarily pungent. The massive surge of nutrients dropped at these sites, together with mechanical disturbance by visiting animals, kills the surrounding vegetation such that the colonies form a barren moonscape in stark contrast to the dense forest just metres away.

Rainforest menagerie

I stumbled across my first Cape York starling colony when I was 14 years old. Despite the large number of snakes using the tree, I initially took the system for granted – the snakes are there to eat the birds – that seemed straightforward enough.

It wasn’t until I described the system to Rick Shine at the University of Sydney that we decided to investigate the colonies in more details, as part of my PhD program. To do this, I located 28 trees in the rainforests at the northern tip of Cape York, which I’ve been surveying for the last three years.

Nightly surveys with a head-torch regularly revealed enormous numbers of scrub pythons (Morelia amethistina), brown tree snakes (Boiga irregularis), cane toads (Rhinella marina), giant tree frogs (Litoria infrafrenata), small mammals (such as Melomys capensis) and centipedes. Those animals aggregate to feed on fallen starling chicks, massive numbers of invertebrates, and seeds dropped by the starlings.

To survey for day-time visitors, I primarily used infrared camera traps. Sifting through the first set of photos was mind-blowing. Nearly every photograph showed more than 30 feral pigs or scrub turkeys (Alectura lathami), as well as more “exotic” species such as noisy pittas (Pitta versicolour) and palm cockatoos (Probosciger aterrimus). The latter species is meant to be rare, but we sometimes found 10 individuals in a single photograph.

We even recorded three specimens of a giant blue-tailed monitor lizard never previously recorded from the Australian continent (Varanus doreanus).

There is little doubt that these seasonal gatherings of animals are a unique part of Australia’s natural heritage. Animal aggregations captivate people’s imaginations, and there are few places on earth where so many different species come together to utilise such a massive nutrient subsidy.

Remarkably, this system remained undescribed until now, offering yet-another reminder of the scientific importance and sheer awesomeness of the Australian tropics.

Daniel Natusch received funding for this research from the Skyrail Rainforest Foundation, the Holsworth Wildlife Endowment, and the Australian Research Council.

I read about the butterfly decline noticed by people all around the country, described by Patrick Barkham (Record low UK butterfly count is ‘a shock and mystery’, 10 October). I don’t find it so much of a mystery, having spent the summer planning for and walking from the Royal Botanical Gardens in Edinburgh on what we called a Bee Line.

This initiative was triggered by a visit in September 2014 to our former farm on the edge of Salisbury Plain. When we moved there in the late 1940s, there were permanent pastures, hedges and ancient drove roads lined with wayfarers’ trees and carpeted with wildflowers – orchids, harebells, trefoils – and abuzz with bees, butterflies, dragonflies and pollinators of all kinds. Now, 60 years on, it is a silent landscape; no cows, chickens, sheep, or even farm workers, just contractors, and of course no birds, butterflies, bees or flying insects. Between 30 August and 6 September we followed our Bee Line, walking some 80km from Edinburgh to our home along small roads, footpaths, cycle tracks, disused railway lines, through open moorland. We saw few butterflies, moths or bees and even noted a lack of midges.

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Scientists have reconstructed the "voicebox" of an extinct bird that lived at the time of the dinosaurs - and they say it honked or quacked like a duck.

The Spanish photographer Xavi Bou digitally combines sequential pictures of birds to create a single image, or chronophotograph, that reveals the shapes of their flight paths against Catalonian skies. His work shows the variety and beauty to be found in the daily activities of the local birds, including spiralling storks, swooping starlings and giddy swifts

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Max McMurdo has made a career out of turning household tat into chic new forms. But can his creations match his talk? We put him to the test

Max McMurdo stands on the doorstep surrounded by toolboxes, neat as a pin. A professional upcycler, he has offered to convert my worst bits of household junk into brilliant new forms. It’s hardly surprising that he is smiling: upcycling is a form of recreational optimism. The whole pursuit is underpinned by the belief that no tat is too tatty. All junk can be saved.

McMurdo, 38, defines upcycling as “adding emotional or financial value [to waste objects] through the addition of design”. The idea has been around since at least the 1990s, and while the principle of adding value to waste makes sense, I have always disliked most of the interiors styles it has generated. Too often, upcycling bolts an adjective – such as “shabby” or “industrial” – to the word “chic” in the hope of rendering rubbish desirable. But maybe Max will change my mind.

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A virus stole the gene coding for the poison of black widow spiders, scientists have found.

Biologist Ryan Killackey filmed for seven years in order to create an account of a remote forest community under pressure from US and Chinese oil companies. The result was Yasuni Man, which focuses on the Yasuni biosphere reserve in Ecuador. The ITT Initiative, which would have protected the Ishpingo, Tambococha and Tiputini regions, was killed off by President Rafael Correa in 2013. This month, the first oil from the Yasuni fields is due to be pumped up by a Chinese company and piped to customers in California

• Yasuni man is an intimate portrait of a beautiful land under siege for its oil

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Car manufacturers told they must address climate change by switching to low-emission models − or face a sell-off of their shares, reports Climate News Network

Major investors have warned the automotive industry it needs to accelerate its readiness for a low-carbon world if it is to retain their support and prosper.

Vehicle makers must put climate change specialists on their boards, engage better with policy-makers, and invest more heavily in low-emission cars, says a network of 250 global investors with assets of more than $24tn (£20tn).

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Sixth attack in 21 months persuades the premier, Mike Baird, to lobby federal government to install shark nets on north coast beaches

All beaches in Ballina on the New South Wales north coast are closed after a man was bitten by a shark while surfing, the sixth attack in 21 months in the area.

The attack has caused a backdown from the premier, Mike Baird, who has resisted the idea of shark nets on north coast beaches has now announced he will lobby for them to be installed.

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IMAGE POWER: A striking photograph will always stir more emotions and create a bigger impact than a spreadsheet of statistics, says acclaimed National Geographic photographer Thomas Peschak.

Wenlock Edge, Shropshire Even though the woundwort has lost its place in the pharmacy, bees visit these late flowers for the nectar tucked inside them

Woundwort grows from a hedge as if to mark some hurt, not to heal so much as to witness it. Hedge woundwort, Stachys sylvatica, belongs to the betony, horehounds and catmint of the waysides. It has small tight whorls of “blood and bandages” flowers – purply red clasps with white markings – nettle-like leaves and a hairy stem that when rubbed has a stink bad enough to do you good.

Related: Country diary: Baltimore, Ireland: For centuries these leaves were nature's gift to wearied travellers

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