A local view helps fight the effects of climate change on the ocean

In 2011, a marine heatwave hit the west coast of Australia leading to ten days of above average sea temperatures. The area was already known as an ocean warming “hotspot”, but this particular period was a tipping point, causing dramatic changes to the marine ecosystem. Underwater kelp forests along the coast reduced in density by 43%, with some disappearing entirely.

Kelp Forest. Image: Fastily, CCBYSA3.0

The loss of kelp resulted in an ecological shift, which led to the growth of different kinds of algae as temperate water species were replaced by subtropical and tropical species. Five years later, kelp forest recovery has still not been observed. A few days of extreme heat resulted in apparently irreversible change.

The frequency and intensity of extreme events, like marine heatwaves, are only expected to increase, and their consequences are hard to predict. But while some of these extreme events could be devastating, it isn’t all doom and gloom. Even though human-induced climate change is happening, local steps can be taken to help alleviate the impacts on our marine environments. And by focusing on a localised approach, we could make a positive difference on a global scale.

For example, in Australia, the government of Queensland spent AUS$7m on a 560 square kilometre cattle station in a bid to protect the Great Barrier Reef World Heritage Site. This cattle station had been producing as much as 40% of the sediment running into the Normanby River system and ultimately the Great Barrier Reef.

Great Barrier Reef. Image: Wise Hok Wai Lum, CCBYSA 4.0

The very existence of the Great Barrier Reef and its extraordinary biodiversity ultimately depends on the health of the corals. When they are covered by sediment, their ability to photosynthesise is dramatically reduced, resulting in less healthy coral. Unhealthy reefs are less able to deal with predators and other damaging events.

In buying the cattle station the government is able to stem the sediment runoff away from the Great Barrier Reef and provide a healthier environment in which the coral can thrive. This is just one example of scientists using local knowledge successfully to inform ministers to make decisions on the local scale that alleviate the problems faced by marine ecosystems of climate change, over fishing and pollution.

To apply such processes in more places in the world, organising climate information and action must move from a global to a regional scale. Overfishing and pollution can be much more effectively dealt with by focusing on local responses.

The Pacific Islands for example, rely heavily on the tuna fish industry. But they have faced major problems of over fishing and reducing stocks – from both small vessels and industrialised ships from other countries. Only a united front would enable control over stocks and a future for the industry.

So in 1982, a collective of islands focused on the conservation and management of tuna in the pacific set up the Naura agreement. Papua New Guinea, Solomon Islands, Tuvalu, Kiribati, Marshall Islands, Naura, the federated states of Micronesia and Palau, and more recently Tokelau, all signed up to the Vessel Day Scheme for Pacific tuna, which limits the amount of days available for fishing to maintain tuna populations. In the last five years the collective has received global recognition for its sustainable management methods – and an increase in revenue from US$60m to US$360m.

Over in the Caribbean, meanwhile, Antigua has some of the most degraded coral reefs in the region. Overfishing is thought to be a main reason for this as it has reduced the amount of herbivorous fish, resulting in the proliferation of seaweed – a main competitor of the corals.

A sea change

To improve the health of the reef, marine protected areas – and specifically a “no take zone” – were created in 2014 in conjunction with the local fishermen. Within a year, this change in local management led to significant increases in the biomass of target fish species. This allowed herbivore fishes to actively graze on the seaweed biomass, enabling respite and providing recovery time for the corals.

In Fiji, mangrove trees are being planted to combat coastal erosion caused by rising sea levels and increasing storm surges. While a direct benefit to Fiji’s inhabitants against potential harm from the ocean, this action also creates a habitat and a site of refuge for many juvenile marine species that will also be affected by future climate change.

Mangrove trees, Fiji. Image: J.-M. Lebigre, CCBYSA3.0

Lessons can be learned from all of these local strategies which could be replicated in similar environments facing similar problems. But developing these initiatives will depend on our understanding of key organisms and their interactions with each other. These are some of the areas suggested by professors Daniela Schmidt and Philip Boyd, in a commentary on what ocean scientists should consider when informing policymakers.

Small island nations will feel the impact of global changes on the ocean first, so they are leading the way in adaption and mitigation techniques in retaliation to changing climates. With the additional threat of America no longer being a part of the international agreements on global warming, tackling climate change on a local and regional scale may be our only hope.

Article written by Cabot Institute member Leanne Melbourne and originally hosted on The Conversation

Exploring legal approaches to climate justice: Reflections from the South Pacific

A traditional canoe painted with world flags on Port Olry beach on the island of Espiritu Santo in Vanuatu

The South Pacific is one of the most vulnerable regions in the world to climate change impacts. The images conjured up of sinking small islands surrounded by miles of rising oceans however do little justice to the vibrant cultures, diverse landscapes and close-knit communities I recently encountered there. As part of my PhD project exploring the legal protection available to climate vulnerable states and communities I was fortunate enough, with the support of the South West Doctoral Training Centre, to be awarded a three month visiting researcher position at the University of the South Pacific in Port Vila, Vanuatu. I spent my time there gathering data, primarily through a series of interviews with key stakeholders from national government, local law firms and NGOs, as well as with a number of regional organisations during a short trip to Fiji.

While being hosted by USP undoubtedly opened doors with participants and made the fieldwork far simpler to organise remotely, I still encountered the inevitable challenges associated with conducting research in a developing country context, thousands of miles from the familiarity of home. The techniques I had prepared for setting up interviews through methodically emailing, calling and making appointments ahead of time proved to be ineffective in a cultural context in which face to face conversations and storying are the norm. After two fruitless weeks of desk-based attempts to contact participants, I abandoned my USP office to wander Port Vila’s streets, notebook and dictaphone in hand, searching out the relevant office buildings. Luckily, as detailed maps and road signs were also hard to come by, government buildings marked with flags were relatively easy to spot. Once I had met with a handful of very helpful people I was armed with a list of relevant organisations and some directions, my study finally began to take off.

Market house in the capital, Port Vila on Efate island

The experience was eye-opening and rewarding, both personally and academically. Vanuatu, as a least developed country, the world’s most at risk to natural disasters according to the UN’s 2015 World Risk Index[1], and extremely vulnerable to climate change impacts, faces numerous challenges. Cyclone Pam, which struck the islands in March 2015, caused an estimated $449 million in loss and damage amounting to a staggering 64% of the country’s GDP[2]. The devastating power of climate related impacts in the region is clear, not only in terms of immediate damage but also, more indirectly, through the economic hardship caused by reduced crop yields among many remote subsistence farming communities, or the impacts of oceanic acidification and warming upon marine ecosystems that many coastal villages depend on for both food and tourism. Talking to those who work closely with these communities at the grassroots level revealed many anticipated issues, from geographic remoteness to a lack of access to institutional support. However, it also revealed the inherent resilience, strong sense of community and traditional knowledge which has enabled devastated communities to recover and should play a central role in the 
development of climate change responses going forward. 

Through the case study, I set out to examine the existing climate policy responses at the regional and national levels, the availability of legal mechanisms and the challenges associated with access to justice faced by communities in practice. In the wake of the adoption of the Paris Agreement at COP21 in December, climate change and debates surrounding the follow-up action needed is at the top of the Pacific policy agenda. While the Agreement has been hailed as a significant step forward for the international community with many states making voluntary commitments to cut their greenhouse gas emissions through Intended Nationally Determined Contributions (INDCs), many aspects of the Agreement leave much to be desired, particularly from the point of view of the most climate vulnerable. There has been no clear mapping out of the financial support pledged by developed countries to assist in the adaptation and mitigation efforts of developing countries.

The Agreement itself contains no enforcement mechanism or legally binding GHG reduction targets and, particularly concerning for Small Island Developing States (SIDS) and Least Developed Countries (LDCs) such as Vanuatu, loss and damage has been consigned to a vaguely worded clause with an express exclusion of any right to compensation. These inadequacies are already being reflected in the reservations declared upon ratification by a number of Pacific nations including the Cook Islands, Tuvalu and the Marshall Islands providing that they view the progress so far to be insufficient to prevent a global temperature rise of 1.5 degrees and that they do not renounce any existing rights under international law. In light of the vast potential for resulting damage in Pacific SIDS, securing more direct access to climate finance and seeing loss & damage addressed more effectively at the international level have emerged as core priorities for both governments and regional bodies. 

The question of whether alternative legal avenues can be of assistance in securing access to such funding however has yet to be answered. My own assumptions that human rights mechanisms would offer the greatest enforceability and therefore represented the best available avenue in terms of climate litigation have been fundamentally challenged. Limited institutional capacity and funding can be seen to restrict the ability of governments in the region to effectively engage with international human rights conventions along with their corresponding reporting requirements, leading to very limited numbers of ratifications and, in turn, a lack of access to the complaints mechanisms those conventions provide for. In addition to this, Pacific states are without any regional human rights mechanism which could have provided for both greater enforceability and greater engagement with international human rights standards. Despite efforts by regional bodies such as the Secretariat of the Pacific Community (SPC) to provide a blueprint for the development of such a mechanism, this is currently not on the political agenda.  
 
Bottom of Mele Cascades, on Efate island, Vanuatu. 

A great deal more research is needed to fully explore the legal options of climate vulnerable states in the region with respect to the loss and damage that they will continue to suffer. While it is clear that Pacific SIDS are keeping their options open with respect to international legal obligations and state responsibility, at present the hope appears to be that the momentum generated in the run up to the adoption of the Paris Agreement will carry through the stronger commitments needed, both in terms of emissions reductions and financial support. I have learned that climate justice has many facets, not merely the more obvious distributive injustice of the manner in which the impacts of climate change manifest themselves by hitting the poorest and those who have contributed the least to global emissions the hardest, but also more procedural aspects of access to justice and the efficacy and availability of institutional support.


Climate justice demands a focus on the challenges faced in practice by vulnerable communities, affording them the opportunity to exercise fundamental rights and to make their voices heard. The inter-linkages between the national, regional and international levels of governance and policy making should be strengthened, carving out a definitive role for civil society in the process. Civil society organisations are crucial, not only in terms of responding to immediate disasters, but also to raise awareness of climate change and its human rights implications, to assist governments in the implementation of climate policies where institutional capacity may be lacking, and to amplify the needs of communities. One approach encompassing all of these many facets will be difficult to construct and may seem near impossible politically to implement, but we as climate change researchers should take heed of the example set by Pacific SIDS who, in the face of incredible adversity, have rallied to lead by example in the international community with ambitious climate policy proposals, along with close and effective collaboration.
 
A ni-Vanuatu family paddling a traditional canoe off Mele beach, Efate

[1] United Nations University Institute for Environment and Human Security UNU-EHS, World Risk Report 2015, available online at: http://collections.unu.edu/eserv/UNU:3303/WRR_2015_engl_online.pdf (accessed 08/06/16) at 46.

[2] Simone Esler, Vanuatu Post Disaster Needs Assessment Tropical Cyclone Pam March 2015, Government of Vanuatu, available online at: https://www.gfdrr.org/sites/default/files/publication/PDNA_Cyclone_Pam_Vanuatu_Report.pdf (accessed 9/6/16) at ix. development of climate change responses going forward.


This blog has been written by University of Bristol Cabot Institute member Alice Venn from the School of Law. Alice’s research examines the protection of climate vulnerable states and peoples under international law from an environmental justice perspective.