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Ocean acidity devastates corals

Ocean acidity devastates corals

Featured image above by Kennedy Wolfe

Increasing carbon emissions in the atmosphere from activities such as the burning of fossil fuels and deforestation are changing the chemistry in the ocean. When carbon dioxide from the atmosphere is absorbed by seawater, it forms carbonic acid. The increased acidity, in turn, depletes carbonate ions – essential building blocks for coral exoskeletons.

There has been a drastic loss of live coral coverage globally over the past few decades. Many factors – such as changing ocean temperatures, pollution, ocean acidification and over-fishing – impede coral development. Until now, researchers have not been able to isolate the effects of individual stressors in natural ecosystems.

In an article published in Nature on 24 February 2016, researchers working at the University of Sydney’s One Tree Island Research Station at the southern end of the Great Barrier Reef (GBR) found that they could improve coral development by reversing the acidity of the reef waters.

“Our oceans contribute around $45 billion each year to the economy”

The international team – led by Dr Rebecca Albright from Stanford University in the USA – brought the acidity of the reef water back to what it was like in pre-industrial times by upping the alkalinity. They found that coral development was 7% faster in the less acidic waters.

“If we don’t take action on this issue very rapidly, coral reefs – and everything that depends on them, including wildlife and local communities – will not survive into the next century,” says team member Professor Ken Caldeira.

Destruction of the GBR would not only be a devastating loss because it’s considered one of the 7 Natural Wonders of the World, but would be a great economic blow for Australia.

Our oceans contribute around $45 billion each year to the economy through industries such as tourism, fisheries, shipping, marine-derived pharmaceuticals, and offshore oil and gas reserves. Marine tourism alone generates $11.6 million a year in Australia.

Impact of acidification on calcification

Corals absorb carbonate minerals from the water to build and repair their stoney skeletons, a process called calcification. Despite the slow growth of corals, calcification is a rapid process, enabling corals to repair damage caused by rough seas, weather and other animals. The process of calcification is so rapid it can be measured within one hour.

Manipulating the acidity of the ocean is not feasible. But on One Tree Island, the walls of the lagoons flanking the reef area isolate them from the surrounding ocean water at low tide – allowing researchers to investigate the effect of water acidity on coral calcification.

“We were able to look at the effect of ocean acidification in a natural setting for the first time,” says One Tree Reef researcher and PhD candidate at the University of Sydney, Kennedy Wolfe.

ocean acidity
The University of Sydney’s Kennedy Wolfe collecting water samples on One Tree Reef. Photo credit: Ken Caldeira

In the same week, an independent research team from CSIRO published results of mapping ocean acidification in the GBR. They found a great deal of variability between the 3851 reefs in the GBR, and identified the ones closest to the shore were the most vulnerable. These reefs were more acidic and their corals had the lowest calcification rates – results that supported the findings from One Tree Reef.

Marine biologists have predicted that corals will switch to a net dissolution state within this century, but the team from CSIRO found this was already the case in some of the reefs in the GBR.

“People keep thinking about [what will happen in] the future, but our research shows that ocean acidification is already having a massive impact on coral calcification” says Wolfe.

– Sue Min Liu

Collaborate or crumble

Collaborate or crumble

Bookshelves in offices around Australia groan under the weight of unimplemented reports of research findings. Likewise, the world of technology is littered with software and gadgetry that has failed to gain adoption, for example 3D television and the Apple Newton. But it doesn’t have to be this way.

Adoption of research is a critical success measure for Cooperative Research Centres (CRCs). One CRC in particular, the CRC for Water Sensitive Cities, has succeeded in having its research adopted by governments, companies and even the United Nations. Its secret is fruitful collaborations spanning diverse academic disciplines to deliver usable results. These are the kind of collaborations CRCs are well placed to deliver, argues Professor Rebekah Brown, project leader and former Chief Research Officer of the CRC for Water Sensitive Cities and director of the Monash Sustainability Institute.

The best are not always adopted. To change that, says Brown, developers need to know how their research solutions will be received and how to adapt them so people actually want them.

“Physical scientists, for example, benefit from understanding the political, social and economic frameworks they’re operating in, to position the science for real-world application,” she says.

The big-picture questions around knowledge and power, disadvantage and information access, political decision-making, community needs and aspirations, policy contexts and how values are economised – these are the domains of the social sciences. When social science expertise is combined with that of the physical sciences, for example, the research solutions they produce can have a huge impact. In the case of the CRC for Water Sensitive Cities, such solutions have influenced policy, strategy and regulations for the management of urban stormwater run-off, for example. Brown and her colleagues have found it takes a special set of conditions to cultivate this kind of powerful collaborative research partnership.

The CRC for Water Sensitive Cities has seen considerable growth. It started in 2005 as a $4.5 million interdisciplinary research facility with 20 Monash University researchers and PhD students from civil engineering, ecology and sociology. The facility grew over seven years to become a $120 million CRC with more than 85 organisations, including 13 research institutes and other organisations such as state governments, water utilities, local councils, education companies and sustainability consultancies. It has more than 230 researchers and PhD students, and its work has been the basis for strategy, policy, planning and technology in Australia, Singapore, China and Israel.

in text green corridor
Blue and green corridors in urban areas are part of the CRC for Water Sensitive Cities’ research into managing water as the world becomes increasingly urbanised.

In a 2015 Nature special issue, Brown and Monash University colleagues Ana Deletic and Tony Wong, project leader and CEO respectively of the CRC for Water Sensitive Cities, shared their ‘secret sauce’ on bridging the gap between the social and biophysical sciences, which allowed them to develop a partnership blueprint for implementing urban water research.


8 tips to successful collaboration

Rebekah Brown
Professor Rebekah Brown, courtesy of the Monash Sustainability Institute

Cultivating interdisciplinary dialogue and forming productive partnerships takes time and effort, skill, support and patience. Brown and her colleagues suggest the following:

1 Forge a shared mission to provide a compelling account of the collaboration’s overall goal and to maintain a sense of purpose for all the time and effort needed to make it work;

2 Ensure senior researchers are role models, contributing depth in their discipline and demonstrating the skills needed for constructive dialogue;

3 Create a leadership team composed of people from multiple disciplines;

4 Put incentives in place for interdisciplinary research such as special funding, promotion and recognition;

5 Encourage researchers to put their best ideas forward, even if unfinished, while being open to alternative perspectives;

6 Develop constructive dialogue skills by providing training and platforms for experts from diverse disciplines and industry partners to workshop an industry challenge and find solutions together;

7 Support colleagues as they move from being I-shaped to T-shaped researchers, prioritising depth early on and embracing breadth by building relationships with those from other fields;

8 Run special issues of single-discipline journals that focus on interdisciplinary research and create new interdisciplinary journals with T-shaped editors, peer-reviewers or boards.

Source: Brown, R.R, Deletic, A. and Wong, T.H.F (2015), How to catalyse collaboration, Nature, 525, pp. 315-317.


A recent Stanford University study found almost 75% of cross-functional teams within a single business fail. Magnify that with PhD research and careers deeply invested in niche areas and ask people to work with other niche areas across other organisations, and it all sounds impossible. Working against resistance to collaborate requires time and effort.

Yet as research partnerships blossom, so do business partnerships. “Businesses don’t think of science in terms of disciplines as scientists do,” says Brown. “Researchers need to be able to tackle complex problems from a range of perspectives.”

Part of the solution lies in the ‘shape’ of the researchers: more collaborative interdisciplinary researchers are known as ‘T-shaped’ because they have the necessary depth of knowledge within their field (the vertical bar of the T), as well as the breadth (the horizontal bar) to look beyond it as useful collaborators – engaging with different ways of working.

Some scholars, says Brown, tend to view their own discipline as having the answer to every problem and see other disciplines as being less valuable. In some ways that’s not surprising given the lack of exposure they may have had to other disciplines and the depth of expertise they have gained in their own.

“At the first meeting of an interdisciplinary team, they might try to take charge, for example talk but not listen to others or understand their contribution. But in subsequent meetings, they begin to see the value the other disciplines bring – which sometimes leaves them spellbound.

“It’s very productive once people reach the next stage in a partnership where they develop the skills for interdisciplinary work and there’s constructive dialogue and respect,” says Brown.

In a recent article in The Australian, CSIRO chief executive and laser physicist Dr Larry Marshall describes Australians as great inventors but he emphasises that innovation is a team sport and we need to do better at collaboration. He points out that Australia has the lowest research collaboration rates in the Organization for Economic Cooperation and Development (OECD), and attributes this fact to two things – insufficient collaboration with business and scientists competing against each other.

“Overall, our innovation dilemma – fed by our lack of collaboration – is a critical national challenge, and we must do better,” he says.

Brown agrees, saying sustainability challenges like those addressed by the CRC for Water Sensitive Cities are “grand and global challenges”.

“They’re the kind of ‘wicked problem’ that no single agency or discipline, on its own, could possibly hope to resolve.”

The answer, it seems, is interdisciplinary.


Moving forward

Alison Mitchell
Alison Mitchell, courtesy of Vitae

There’s a wealth of great advice that CRCs can tap into. For example the Antarctic Climate & Ecosystems CRC approached statistical consultant Dr Nick Fisher at ValueMetrics Australia, an R&D consultancy specialising in performance management, to find the main drivers of the CRC’s value as perceived by its research partners, so the CRC could learn what was working well and what needed to change.

Fisher says this kind of analysis can benefit CRCs at their formation, and can be used for monitoring and in the wind-up phase for final evaluation.

When it comes to creating world-class researchers who are T-shaped and prepped for research partnerships, Alison Mitchell, a director of Vitae, a UK-based international program dedicated to professional and career development for researchers, is an expert. She describes the Vitae Researcher Development Framework (RDF), which is a structured model with four domains covering the knowledge, behaviour and attributes of researchers, as a significant approach that’s making a difference to research careers worldwide.

The RDF framework uses four ‘lenses’ – knowledge exchange, innovation, intrapreneurship [the act of behaving like an entrepreneur while working with a large organisation] and entrepreneurship – to focus on developing competencies that are part and parcel of a next generation research career. These include skills for working with academic research partners and industry.


– Carrie Bengston

watersensitivecities.org.au

www.acecrc.org.au