El Niño in the Pacific has an impact on dolphins over in Western Australia



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Leaping bottlenose dolphins.
Kate Sprogis/MUCRU, Author provided

Kate Sprogis, Murdoch University; Fredrik Christiansen, Murdoch University; Lars Bejder, Murdoch University, and Moritz Wandres, University of Western Australia

Indo-Pacific bottlenose dolphins (Tursiops aduncus) are a regular sight in the waters around Australia, including the Bunbury area in Western Australia where they attract tourists.

The dolphin population here, about 180km south of Perth, has been studied quite intensively since 2007 by the Murdoch University Cetacean Unit. We know the dolphins here have seasonal patterns of abundance, with highs in summer/autumn (the breeding season) and lows in winter/spring.

But in winter 2009, the dolphin population fell by more than half.

A leaping bottlenose dolphin.
Kate Sprogis/MUCRU, Author provided

This decrease in numbers in WA could be linked to an El Niño event that originated far away in the Pacific Ocean, we suggest in a paper published today in Global Change Biology. The findings could have implications for future sudden drops in dolphin numbers here and elsewhere.


Read more: Tackling the kraken: unique dolphin strategy delivers dangerous octopus for dinner


A Pacific event

The El Niño Southern Oscillation (ENSO) results from an interaction between the atmosphere and the tropical Pacific Ocean. ENSO periodically fluctuates between three phases: La Niña, Neutral and El Niño.

During our study from 2007 to 2013, there were three La Niña events. There was one El Niño event in 2009, with the initial phase in winter being the strongest across Australia.

The blue vertical line shows the decline in dolphin numbers (d) during the 2009 El Niño event.
Kate Sprogis, Author provided

Coupled with El Niño, there was a weakening of the Leeuwin Current, the dominant ocean current off WA. There was also a decrease in sea surface temperature and above average rainfall.

ENSO is known to affect the strength of the south-ward flowing Leeuwin Current.

During La Niña, easterly trade winds pile warm water on the western side of the Pacific Ocean. This westerly flow of warm water across the top of Australia through the Indonesian Throughflow results in a stronger Leeuwin Current.

During El Niño, trade winds weaken or reverse and the pool of warm water in the Pacific Ocean gathers on the eastern side of the Pacific Ocean. This results in a weaker Indonesian Throughflow across the top of Australia and a weakening in strength of the Leeuwin Current.

A chart showing sea surface temperature (SST) anomalies off Western Australia. Note the extremes for the moderate El Niño in 2009 (blue rectangle), and the strong La Niña in 2011 (red rectangle)
Moritz Wandres, Author provided

The strength and variability of the Leeuwin Current coupled with ENSO affects species biology and ecology in WA waters. This includes the distribution of fish species, the transport of rock lobster larvae, the seasonal migration of whale sharks and even seabird breeding success.

The question we asked then was whether ENSO could affect dolphin abundance?

What happened during the El Niño?

These El Niño associated conditions may have affected the distribution of dolphin prey, resulting in the movement of dolphins out of the study area in search of adequate prey elsewhere.

A surfacing bottlenose dolphin.
Kate Sprogis/MUCRU, Author provided

This is similar to what happens for seabirds in WA. During an El Niño event with a weakened Leeuwin Current, the distribution of prey changes around seabird’s breeding colonies resulting in a lower abundance of important prey species, such as salmon.

This in turn negatively impacts seabirds, including a decrease in reproductive output and changes in foraging.

In southwestern Australia, the amount of rainfall is strongly connected to sea surface temperature. When the water temperature in the Indian Ocean decreases, the region receives higher rainfall during winter.

High levels of rainfall contribute to terrestrial runoff and alters freshwater inputs into rivers and estuaries. The changes in salinity influences the distribution and abundance of dolphin prey.

This is particularly the case for the river, estuary, inlet and bay around Bunbury. Rapid changes in salinity during the onset of El Niño may have affected the abundance and distribution of fish species.

In 2009, there was also a peak in strandings of dead bottlenose dolphins in WA (between 1981-2010), but the cause of this remains unknown.

Of these strandings, in southwest Australia, there was a peak in June that coincided with the onset of the 2009 El Niño.

Specifically, in the Swan River, Perth, there were several dolphin deaths, with some resident dolphins that developed fatal skin lesions that were enhanced by the low-salinity waters.

What does all this mean?

Our study is the first to describe the effects of climate variability on a coastal, resident dolphin population.

A group of bottlenose dolphins.
Kate Sprogis/MUCRU, Author provided

We suggest that the decline in dolphin abundance during the El Niño event was temporary. The dolphins may have moved out of the study area due to changes in prey availability and/or potentially unfavourable water quality conditions in certain areas (such as the river and estuary).


Read more: Explainer: El Niño and La Niña


Long-term, time-series datasets are required to detect these biological responses to anomalous climate conditions. But few long-term datasets with data collected year-round for cetaceans (whales, dolphins and porpoises) are available because of logistical difficulties and financial costs.

Continued long-term monitoring of dolphin populations is important as climate models provide evidence for the doubling in frequency of extreme El Niño events (from one event every 20 years to one event every ten years) due to global warming.

The ConversationWith a projected global increase in frequency and intensity of extreme weather events (such as floods, cyclones), coastal dolphins may not only have to contend with increasing coastal human-related activities (vessel disturbance, entanglement in fishing gear, and coastal development), but also have to adapt to large-scale climatic changes.

Kate Sprogis, Research associate, Murdoch University; Fredrik Christiansen, Postdoctoral Research Fellow, Murdoch University; Lars Bejder, Professor, Cetacean Research Unit, Murdoch University, Murdoch University, and Moritz Wandres, Oceanographer PhD Student, University of Western Australia

This article was originally published on The Conversation. Read the original article.

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Writing the WA wheatbelt, a place of radical environmental change


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A message ploughed in the land calls on the federal government to help drought-affected farmers near the wheatbelt town of Kondinin in 2001.
Liza Kappelle/AAP

Tony Hughes-D’Aeth, University of Western Australia

What can creative literature tell us about radical environmental change? Most people accept that literature can be closely connected to places. Whether it is Dickens’s London or Hardy’s Wessex, we also accept that imaginative works deliver something about the nature of place that does not necessarily come to us by any other means. The Conversation

How then does this work in Australia? I have spent the past decade writing a literary history of the Western Australian wheatbelt and have sought in various ways to answer this question.

It is a regional literary history that nevertheless encompasses some of the nation’s finest writers — Albert Facey, Dorothy Hewett, Peter Cowan, Jack Davis, Randolph Stow, Elizabeth Jolley, Tom Flood, John Kinsella. Facey’s A Fortunate Life (1981) is a landmark in Australian autobiography; Hewett, Cowan and Stow helped define literary modernism in Australia; Jack Davis was a leading figure in the Aboriginal literary renaissance; and Jolley’s The Well (1986) and Flood’s Oceana Fine (1990) both won the Miles Franklin literary award.

What unites these works? Is it simply a quirk of fate that a sparsely populated hinterland in Australia’s most isolated state produces a body of literature that rivals in many ways the literary outputs of the great Australian metropolitan centres in Melbourne and Sydney?

For the answer to this question one has to understand the history of the WA wheatbelt. In two 30-year periods (1900-1930 and 1945-1975) an area of land roughly the size of Britain was stripped of its native vegetation for the production of grain and livestock. It is a crescent of land that begins just north of Geraldton on the west coast and sweeps south and east to Esperance on the south coast.

When the Swan River Colony was founded in 1829, six years before Melbourne, it was with the intention of forming an agricultural colony of closely settled yeoman farmers, who would own their own land and congregate in small, nicely spaced villages.

The clearing of the wheatbelt during the 20th century.

However, the antique soil of WA bore almost no resemblance to the fertile soils of recently glaciated northern Europe. Four to five more or less rainless months, where dry desert winds blow steadily across the vegetation was also an unprecedented challenge to farming methods learned in the British Isles. Lastly, there were almost no rivers to speak of, and permanent summer water was a rare commodity.

WA Government land advertisement from 1904.

For all these reasons, the agricultural dream of WA remained largely unrealized. The game-changing event was the goldrush of the 1890s. The population of the colony trebled between 1889 and 1896, from 44,000 to 138,000.
Knowing that the gold would be dug out before too long but wanting to capture this new cache of colonists, the colonial government passed the Homesteads Act in 1893 to parcel out land, and established an Agricultural Bank in 1894 to finance farmer-settlers. An army of land surveyors fanned out through the southwest and provisions for water, fertilizer and rail transit were quickly put into motion. Towns were gazetted, one-teacher schools popped up and WA took the lead in distance learning.

Albert Facey’s uncle Archie McCall had come over from South Australia to work the goldfields and was one of those who leapt at the land offer. Dorothy Hewett’s grandparents had made their money selling goods to diggers heading out to the goldfields at Kalgoorlie and Coolgardie and with this they purchased an extensive parcel of prime land at Yealering not far from McCall’s farm at Wickepin.

The dream refracted

What we get in both of these very different writers is a distinct picture of the dream of the wheatbelt. It is this dream — a settler-colonial ideology of farming independence — that we see refracted through the wheatbelt writers all the way through the 20th century.

The animating vision of the wheatbelt was an amalgam of ideals. On the one hand, it appealed to the basic material prospect of upward mobility. In the late 19th and early 20th century, opportunities for advancement through education were not generally available.

But the wheatbelt vision seemed even more deeply situated than this, offering itself as an antidote to the ills of modern city life. As the various states all moved to convert low-yield pastoral production to high-yield cash-cropping, there emerged a veritable ideology of wheat in the post-Federation years, and right through to the Depression.

C.J. Dennis joined the chorus in his bouncy ballad simply called Wheat from 1918:

Tho’ it ain’t a life o’ pleasure,

An’ there’s little time for leisure,

It’s contentin’, in a measure, is the game of growin’
Wheat.

Dennis and others helped to drag crop-farming away from its associations with European peasant drudgery and into the noble task of nation-building and feeding the “bread-eating” (i.e. European or European-derived) countries of the world.

Dorothy Hewitt, 1965.
University of Western Australia archives.

For Facey, even though his memoir was not published until 1981 (the year before he died), the dream of the wheatbelt and the ideology of wheat remain preserved as if in amber. The basic tasks of “clearing” the wheatbelt — particularly the regimes of annual burning and cutting — are remembered with particular pride by Facey.

Born a generation and a half later, Hewett grew up in a farm that was already in place. Although she left Lambton Downs (as it was dubbed) at the age of 11, Hewett’s writing returned again and again to the wheatbelt. Hewett’s wheatbelt had a mythic, gothic flavour in which the dream of it is present but often in inverted form. This wheatbelt is beset by a pernicious fatality and mired in the sexual miseries of her extended family.

Hewett deserves credit for being the first writer to take seriously the fact that the wheatbelt was built on land whose traditional owners had not disappeared but were still there, either impoverished in fringe-camps or incarcerated in government or church institutions.

The other side of the farming frontier

But it was the emergence of Aboriginal writing in the generation politicized by the citizenship referendum that brought a powerful voice from the other side of the wheatbelt frontier. Jack Davis had spent time in the notorious Moore River Native Settlement on the edge of the mid-northern wheatbelt, and then (after the untimely death of his father), with relatives of his mother’s sister at the Brookton reserve in the Avon valley. There he did the usual itinerant work that Aboriginal families did in the wheatbelt’s early years — clearing, fencing, shearing, rabbiting.

What Davis gives us in his poetry of the 1970s and the great plays of the 80s is a completely alternative vision of the wheatbelt. It doesn’t look like wheatbelt literature for the simple reason that it does not proceed either positively or negatively from the wheatbelt dream. Instead, it proceeds from Aboriginal presence in the land.

The tragedy of the Noongar is shown in all its woeful extremity, but tempered by Davis’s astringent sense of humour—his black humour if you like. But really Jack Davis is writing about survival. His example has provided a platform for a writer like Kim Scott to foster new forms of Noongar creative re-emergence, and also new forms of penetrating critique.

At the same time that a consciousness of Aboriginal dispossession began to force its way into the understanding of the wheatbelt, a much sharper sense of its ecological cost was also starting to emerge. Certainly, right through my literary history of the wheatbelt there was a realization that the waving fields of wheat were planted on lands stripped of their native ecosystems.

Everyone knew this because everyone spent a considerable part of each year toiling to clear the land. But the view tended to be that there was always more bush. Each bit of clearing was a merely local matter. Likewise, as rising salinity became directly associated with the clearing of native perennial vegetation, it was repeatedly explained away as a small, local, confined phenomenon.

Environmental destruction

But in the writing of Peter Cowan and that of the naturalist, Barbara York Main, the full picture of environmental destruction began to appear without the customary euphemism. It would be wrong to say that public opinion, particularly in the wheatbelt, changed decisively in the 1960s or even the 1970s. The cart-blanche denial, however, of environmental value — that the natural world of the wheatbelt had a value — became harder and harder to maintain.

By the 1980s, the wheatbelt had become uncanny. No longer the sign of the natural cycles of life replenishing the earth with seasonal regularity, but a vast and even repellent monocultural expanse. The wheatbelt was something profoundly unnatural in the eyes of writers like Elizabeth Jolley, Tom Flood and John Kinsella.

Of these, it has been Kinsella who has proved to be both durable and prolific. His poems, stories and other writings specify a wheatbelt that exists in strange cross-currents of science, tradition and avarice. The natural world is prised out of its familiar romantic categories and, in his remarkable work, exists in eerie counterpoise to the techno-scientific mania of modern agribusiness.

The central fact of the wheatbelt is radical disappearance. On one hand there was the destruction of the sovereign culture of the Noongar, custodians for millennia. Noongar people continue to practice and uphold their culture in spite of everything and the land continues to speak through them.

But on the other hand we must also contend with the fact that in the central wheatbelt shires, at least, only something like 7% of the natural vegetation (and the animal habitat it provides) remains. This, in a place that has a biodiversity as stunning as a rainforest canopy.

Charred timber after the ‘burn’.
State Library of Western Australia

Literature cannot, in and of itself, make these losses good. A thousand novels cannot replace one extinct species. But in human terms there is hope. The Noongar language is being revitalized. And here literature certainly does have a role to play. Jack Davis used Noongar in his plays and provided his own glossaries. Kim Scott’s fiction, and occasional poetry, gives its readers Noongar — in fact teaches its readers Noongar and the deft sonics of a language adapted to country. And many of today’s farmers are now at the forefront of conservation initiative and Landcare groups.

The role, though, that I see for literature in coming to terms with the facts of the wheatbelt lies in its capacity to continuously disabuse us of the complacent certitudes by which we think we know the world. It need not require the experimental bravura of Kinsella’s postmodern verse to do this unsettling. Even the older writing does it in surprising ways.

Only 7% of the central wheatbelt’s natural vegetation is left.
Google Earth.

What Dorothy Hewett and Jack Davis do within the broad parameters of theatrical realism nevertheless succeeds in unpicking the simple pouches we tend to pack our conceptions in. Barbara York Main’s natural histories throw open the dazzling singularity of wheatbelt life forms, and at the same time their intricate interconnections. Peter Cowan’s quietist studies of disillusioned loneliness, defamiliarises the wheatbelt just as certainly as Facey’s childhood glee at burning the bush to smouldering ashes.

It is not a particular kind of literature that gets to the “heart” of the wheatbelt. It is the fact that the wheatbelt falls into the prism of literature that allows us to see this place in terms other than the ones it gave itself via its animating dream of agricultural plenitude and generational continuity.

Creative writing is not blind to the natural or economic forces that determine the fate of the wheatbelt, but it will always approach the matter through the medium of human subjectivity. In this sense, it is only literature that allows us to see inside the wheatbelt that was created, geologically speaking, in the blink of an eye.

Tony Hughes-D’Aeth, Associate Professor, English and Cultural Studies, University of Western Australia

This article was originally published on The Conversation. Read the original article.

Still here: Night Parrot rediscovery in WA raises questions for mining


Robert Davis, Edith Cowan University

The Night Parrot is unquestionably one of Australia’s most enigmatic, elusive and enthralling species. The final frontier of Australian ornithology, this cryptic parrot eluded dedicated expeditions to find it for nearly half a century. The Conversation

Last week, a momentous chapter in the Night Parrot story was written, with the first photograph of a live Night Parrot in Western Australia. The photos come in the wake of several other recent sightings, including the parrot’s rediscovery in Queensland in 2013.

Despite media reports, the parrot has never been officially listed as extinct, with sporadic evidence of its existence throughout the 20th century.

But now we know for sure that the parrots are alive and found across the continent, we can move on to making sure they remain so in the future.

Mystery bird

We know that Night Parrots favour spinifex or tussock grasslands, often close to inland wetland systems. But the areas of potential habitat are vast throughout inland Australia.

The Night Parrot has been listed as endangered in the Action Plan for Australian Birds since 1992. It is listed as endangered under federal legislation.

It has never been listed as “presumed extinct” or “extinct”. Reliable ongoing reports and the well-known cryptic nature of the species meant that the ornithological community considered it likely to have survived, albeit incredibly hard to spot.

The Night Parrot has been known to exist in WA since at least 2005, when a colleague and I clinched the first peer-accepted sighting in recent Australian history during an environmental impact assessment for the Fortescue Metals Group (FMG) Cloudbreak mine.

Fortescue Marshes, where the Night Parrot was first seen again in WA in 2005.
Robert Davis

This was by no means the first sighting of Night Parrots in WA, with regular and reliable reports since at least the 1980s. But until 2005 none had provided sufficient detail to eliminate other possibilities. Further sightings have been monitored at another location in the arid zone since 2009 and that work is pending publication.

The significance of the latest find is immense. A dedicated team of birdwatchers (Adrian Boyle, Bruce Greatwich, Nigel Jackett and George Swann) has confirmed the existence of a population in WA. The discovery, resulting from a well-planned expedition, is the start of a real dialogue about Night Parrot conservation in WA.

The latest record cements the fact that Night Parrots are present at several locations in WA and potentially throughout arid Australia, including in regions rich in mineral resources.

In contrast to the Queensland populations, which have so far been found in national parks and pastoral leases, the WA situation sets up a quandary for how to manage development, Night Parrots and mining.

Mining and conservation

Our 2005 sighting was important because, given the parrot’s endangered status, FMG was required to provide offsets for potential disturbance to Night Parrot habitat. The offsets included avoiding areas of likely habitat on the Fortescue Marshes, and funding follow-up surveys throughout the areas surrounding the proposed mine. These unfortunately did not find further evidence of Night Parrots.

Research offsets from FMG also funded the writing of a national research plan for Night Parrots. This was later followed by on-ground research on Night Parrots at Pullen Pullen Reserve in Queensland, the population found by naturalist John Young in 2013.

Recent developments by other WA resource companies have seldom considered Night Parrots. My personal experience is that surveys usually look for endangered mammals such as Northern Quolls and Bilbies, but rarely search properly for Night Parrots. This is likely due to two main reasons.

The first is the incredibly cryptic nature of the Night Parrot. Clearly the species has evaded detection for so long because it is difficult to find.

The second is what I term “the Thylacine factor”. The only equivalent species in Australia that has the same degree of scepticism and mythology is the Thylacine.

Thylacines have (so far) not been rediscovered. But developers, consultants and regulators take the same attitude to Night Parrot sightings. The parrots are often seen as a mythical animal that doesn’t exist. The idea of looking for them is met with mirth.

Finding the parrots

Recent findings from research by Steve Murphy in Queensland, and other recent work in WA, are slowly providing us with the tools to overcome both of these issues. With better knowledge of their specific habitat requirements, including a need for long-unburned grasslands close to water sources, we can reduce the daunting challenge of Night Parrots potentially existing anywhere that spinifex is found.

Fire is one of the threats facing the Night Parrot.
Robert Davis

The recent release of calls from the Queensland population and a new recording of calls from the WA population provide the most powerful tool yet for doing surveys. Playing back the calls can be used to elicit a response from any Night Parrots in the area. The call can also be used to identify calls from deployed remote recording devices.

As more populations are discovered and more evidence becomes available, this will help convince the public and decision-makers that the parrots are (hopefully) found across a wide range and need careful management, despite the difficulty of observing them.

Let’s hope government bodies will strongly enforce the requirement to search for Night Parrots in all areas of potential habitat within their known current and historic range. This should ensure that we don’t lose any parrots before they are even found.

Robert Davis, Senior Lecturer in Vertebrate Biology, Edith Cowan University

This article was originally published on The Conversation. Read the original article.

Three ingredients for running a successful environmental campaign


Andrea Gaynor, University of Western Australia

Here in Perth, a battle is raging over a 5km stretch of road known as Roe 8. Work on the project, part of the proposed Perth Freight Link, began late in 2016 and as legal avenues to halt construction were exhausted, opponents resorted to non-violent direct action. Some protest “mass actions” have attracted more than 1,000 people from all walks of life and by the end of January, as bulldozers tore through the Coolbellup bushland under costly police protection, well over 100 had been arrested.

Clearing machinery arrives on site under heavy police protection, January 2017.
Gnangarra

Proponents say the road is necessary to improve the safety and efficiency of freight traffic to and from the Port of Fremantle. Opponents point to freight alternatives that will avoid Roe 8’s destruction of Aboriginal heritage, endangered banksia woodland, and important wetlands. Critics have also decried the government’s lack of transparency and prudence in decision-making, and highlighted serious shortcomings in environmental policies and laws.

The state’s Labor opposition has promised to scrap the project if it wins government at the state election on March 11, yet to the shock and dismay of many, bulldozing continues.

How will the conflict end? While history provides no sure guide to the future, it does reveal that successful environmental campaigns have tended to share several key features that unsuccessful campaigns have lacked. What are they?

1. Elections

Some of the biggest environmentalist victories have been won at the ballot box. This was the case for the proposed Franklin River dam, which became a federal election issue and helped to bring Bob Hawke’s Labor government to power.

By-elections have also decided the fate of environmentally contentious developments. Wayne Goss’s proposed “Koala tollway” between Brisbane and the Gold Coast cost Labor nine seats in the 1995 state election; a by-election in February 1996 saw the end of both Goss’s majority and the toll road.

Similarly, the campaign against a proposal for agricultural development in Victoria’s Little Desert delivered a shock metropolitan by-election result that, along with sustained public pressure, quashed the proposal.

More recently, the East-West Link toll road in Melbourne was, like Roe 8, hurried into the construction phase before an election with no full business case available for public scrutiny. The campaign against the Link, which united public transport advocates and local councils, ran for more than a year and attracted A$1.6 million in policing costs. Labor promised to halt construction and following his electoral success in November 2015, the incoming premier Daniel Andrews tore up the contracts, setting what might turn out to be a crucial precedent for WA Labor’s Mark McGowan.

Even electoral failures can help environmental causes in the long run. Advocates for Lake Pedder in Tasmania didn’t attract political support for their cause from either major party, so they formed their own: the United Tasmania Group. It narrowly failed to win a seat at the 1972 state election, and Lake Pedder was lost.

But those who were galvanised by this failure were instrumental in the victory 10 years later over the Franklin dam, which transformed federal-state relations and launched the Australian Greens as a political force.

2. Unions

Many past environmental campaigns have succeeded only through union involvement. In the 1970s and ‘80s, almost 50% of the Australian workforce was unionised, giving the unions significant power to shut down contentious projects.

The 1970 campaign against oil drilling on the Great Barrier Reef claimed success when the Transport Workers Union and affiliates placed a black ban on drilling vessels in the region. The 1970s “Green bans”, led by Jack Mundey and the NSW Builders’ Labourers Federation, blocked a range of threats to heritage sites and bushland, including urban bushland at Kelly’s Bush on Sydney’s lower North Shore.

With union membership today at only around 15%, and the environment a low priority for some key unions, this opportunity for intervention has all but vanished.

3. Alternatives

Campaigns are more likely to be successful where environmentalists can point to viable alternatives for the projects they oppose. For example, opponents of woodchipping in East Gippsland in the 1980s produced a report showing how developing agriculture and tourism in parallel with a restructured and modernised timber industry would produce 450 extra jobs in the region.

This material was then used in political lobbying, as well as campaigning in marginal seats, leading to the declaration of the Errinundra Plateau and Rodger River National Parks in 1987. Logging continues, however, in adjacent areas.

Similarly, Citizens Against Route Twenty achieved success in 1990 with an intense media campaign that included an alternative vision for Brisbane’s urban transport.

Back to Roe 8

In sprawling suburban Perth, the track record of opposition to new roads does not inspire much hope for those campaigning against Roe 8. Previous protests against the Kwinana Freeway, the Graham Farmer Freeway and the Farrington Road extension were all more or less futile.

In each case the opponents were deemed to be “anti-progress”, with progress implicitly represented by the construction of new road infrastructure. Similar language pervades the current rhetoric around Roe 8, which is portrayed by supporters as a solution to all the traffic problems of Perth’s southern suburbs.

Sustainable transport advocates take a longer view; for instance, in the alternative plan laid out by Curtin University’s Peter Newman and Cole Hendrigan. This, however, has been rejected by the Barnett government in favour of the Roe Highway extension, which was originally planned for different purposes in the 1950s.

The protest against Roe 8 has two of the three key historical ingredients for success (an election, and a clearly outlined alternative plan). It has also harnessed the new power of social media and drone footage.

Opponents of Roe 8 at the end of an hour-long silent protest in Forrest Place, central Perth, January 2017.

Rarely has direct action clinched an environmental campaign, although there are precedents: protesters’ destruction of felled timber at Terania Creek in 1979 brought an end to logging. Tree-sitting and human barricades bought enough time for political change to halt the Cape Tribulation-Bloomfield Road in Queensland’s Wet Tropics. In Coolbellup numerous lock-ons and tree-sits have delayed works, but time is running out for the wetlands in the path of Roe 8.

After the March 11 election we will know whether the already bulldozed area will be restored, or whether the road will be built. Whatever the outcome, one thing is certain: pressure is building on resources and urban spaces, and the indicators of environmental health are continuing to decline.

This trend makes it ever more likely that our economic and political priorities will find themselves on a collision course with communities seeking to protect their local environments. It seems safe to say that we will see plenty more protests like this in coming years.

The Conversation

Andrea Gaynor, Associate Professor of History, University of Western Australia

This article was originally published on The Conversation. Read the original article.

The third global bleaching event took its toll on Western Australia’s super-corals


Verena Schoepf, University of Western Australia

Australia’s iconic Great Barrier Reef has suffered through the worst bleaching event in its history, part of the world’s third mass bleaching event.

However, coral reefs from the other side of the continent have also experienced unprecedented bleaching and coral death. This is bad news because the unique coral reefs of Western Australia’s northwest are home to some of the toughest coral in the world.

Western Australia’s unique coral reefs

Although much less well-known, coral reefs in Western Australia are highly diverse. They include, for example, Australia’s largest fringing reef, the World Heritage-listed Ningaloo Reef, as well as Australia’s largest inshore reef, Montgomery Reef which covers 380 square kilometres.

WA’s remote Kimberley region also features “super-corals” – corals that have adapted to a naturally extreme environment where tidal swings can be up 10m. These corals can therefore tolerate exposure to the air during low tide as well as extreme daily temperature swings.

My past research has shown that these naturally extreme conditions increase the heat tolerance of Kimberley corals but that they are nevertheless not immune to bleaching when water temperatures are unusually hot for too long.

Previously I had put these super-corals in tanks and subjected them to a three-week heatwave to see how they would respond, but I always wondered how they would cope in the wild where such events typically unfold over longer timescales. Unfortunately, I did not have to wait long to find out.

Kimberley reef exposed at low tide before…
Verena Schoepf, Author provided
….and during the bleaching.
Morane Le Nohaic, Author provided

The hottest years on record

2015 was the hottest year on record and 2016 will likely be hotter still. This has caused an unprecedented global coral reef crisis. Although global coral bleaching events already occurred in 1998 and 2010, this third global bleaching event is the longest on record and still ongoing.

Sadly, in WA the Kimberley region was hit the hardest. As part of Australia’s National Coral Bleaching Taskforce, colleagues and I conducted extensive monitoring before, during and after the predicted bleaching event along the entire WA coastline. In the southern Kimberley, we also carried out aerial surveys to assess the situation on a regional level.

Aerial view of a bleached inshore Kimberley reef in April 2016.
Claire Ross and Steeve Comeau, Author provided

The severity and scale of bleaching that we observed in April was devastating. Almost all inshore Kimberley reefs that we surveyed had about 50% bleaching, including Montgomery Reef. Researchers from the Australian Institute of Marine Science found that offshore Kimberley reefs such as Scott Reef fared even worse, with 60-90% bleaching in shallow lagoon waters.

Many corals had already died from the severe bleaching in April, but the final death toll has only been revealed during visits to the Kimberley last month. Vast areas of coral reef are now dead and overgrown with algae, both at the inshore and offshore Kimberley reefs.

According to local Indigenous Rangers and Traditional Owners who assisted in the research, this appears to be unprecedented. Such events had never previously been described in their rich local history of the coastal environment.

Bleached staghorn coral on inshore Kimberley reefs in April 2016.
Verena Schoepf
Dead staghorn coral on the same reefs in October 2016.
Verena Schoepf

Some good news

There was nevertheless some good news. Corals living in intertidal areas, where they regularly experience exposure to air, stagnant water, and extreme temperature fluctuations, bleached less than corals from below the low-tide mark, where conditions are far more moderate. And importantly, the majority of intertidal corals were able to fully recover within a few months.

Similarly, researchers from the Western Australian Museum and Curtin University confirmed last month that intertidal coral reefs in the central Kimberley (Bonaparte Archipelago) were in great condition.

Overall, these observations confirm the findings from my past research which showed that highly-variable, extreme temperature environments can boost the bleaching resistance of corals.

It is also important to note that the 2016 severe bleaching event in WA was restricted to the Kimberley region. Ningaloo Reef as well as coral reefs in the Pilbara and the Abrolhos Islands all escaped the bleaching. This is great news because some of these locations are still recovering from major bleaching in 2010-11 and 2013.

Healthy coral at Ningaloo Reef in 2016.
Morane Le Nohaic

The future of WA’s coral reefs

Although it is now clear that WA’s coral reefs are at risk of bleaching during both El Niño (as in 2016) and La Niña years (as in 2010-11), they have some advantages over other reefs that may hopefully allow them to recover from bleaching more quickly and stay healthy in the long term.

For example, most of WA’s coral reefs are located far away from major population centres and are thus less affected by environmental threats such as poor water quality (though other threats such as oil and gas exploration do exist). We also know that their isolation, particularly in the case of offshore reefs, helped them recover from previous mass bleaching events.

Finally, it is critical that we identify coral populations worldwide that are already naturally adapted to higher temperatures and have a greater bleaching resistance, such as the Kimberley corals.

These super-corals, while not immune to climate change, should be a priority for research into the limits of coral tolerance, as well as conservation efforts.

The Conversation

Verena Schoepf, Research Associate, University of Western Australia

This article was originally published on The Conversation. Read the original article.