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Nature doesn't recognise borders but countries can collaborate to save species—the Escazú Agreement shows how

Nature rarely recognizes national borders. Many Australian birds, for example, are annual visitors, between Southeast Asia, Russia, and Pacific Islands.

Yet, most efforts to protect ecological processes and habitats are designed and implemented by individual nations. Not only are these traditional approaches to conservation too geographically limited, they don't address problems that seep across borders and drive ecosystem decline.

Our new shows international collaboration and environmental management across national borders—a truly transboundary approach—is essential. We focused on an international environmental agreement that recently came into force across the Latin America and Caribbean region.

as the Regional Agreement on Access to Information, Public Participation and Justice in Environmental Matters in Latin America and the Caribbean—or, more commonly, as the —it offers a hopeful example of new strategies to rise to this transboundary challenge.

What is the Escazú Agreement?

In 2018, 33 Latin American and Caribbean countries were invited to sign and ratify the landmark Escazú Agreement, the first legally binding environmental agreement to explicitly integrate human rights with environmental matters.

It has so far been ratified by ; have signed it but not yet ratified.

As we detail in our recent : "The agreement outlines an approach to enhance the protection of environmental defenders, increase public participation in environmental decision-making, and foster cooperation among countries for biodiversity conservation and human rights."

The Escazú Agreement and human rights

Countries from this region share transboundary species such as jaguars, as well as marine reserves containing immense biodiversity (including 1,577 endemic ).

But the Escazú Agreement isn't just about flora and fauna. It also highlights the importance of human rights and public participation in environmental management—elements that are also vitally important for transboundary conservation.

Latin America and the Caribbean have a history of disputed maritime claims and a mismatch between management of terrestrial and marine jurisdictions.

Environmental protections and jurisdiction complexities have, in the past, curtailed the rights of Indigenous people who traditionally .

This is where the Escazú Agreement could have contributed. It sets out guidelines for public engagement and may have helped Indigenous people have their voices heard.

But and many island states are yet to ratify the Escazú Agreement. Doing so would help with these issues in future.

Many biodiverse countries with high levels of human rights violations and sharing multiple ecosystems and species have not yet ratified the agreement.

Marine transboundary conservation needed

Ocean borders are extra messy. Some compared to have habitat and migration ranges that cross national borders. Countries with large numbers of transboundary marine species include the US, Australia and Japan.

Many of Australia's iconic ocean species—such as great white sharks, sea turtles, and humpback whales—are international migrants found in over 100 countries.

Even species that don't move at all, like plants or corals, are often widely distributed. Take the slimy sea lettuce (Ulva lactuca), which grows along the coasts of almost 200 countries.

Marine species essentially share one ocean, making transboundary management extra challenging. Not only can threats such as pollution rapidly spread large distances over ocean currents, our traditional concept of sovereignty and borders makes even less sense on the ocean than it does on land.

Many countries must cooperate to protect species ranges across vast tracts of ocean.

Australia plays a key role

Australia must step up as a leader of domestic and transboundary management. After the US, it has the most transboundary marine species in its ocean territory.

Most species are shared with Indonesia, New Zealand, Papua New Guinea and the high seas. As a well-resourced country, it is imperative Australia is part of international efforts to preserve this biodiversity.

Unfortunately, this isn't always the case.

Australia has a poor record on protecting its , and is ranked among the top .

Our patchwork leaves the door open for unsustainable and illegal shark finning.

Australian governments need to collaborate with other countries, industries, and socio-environmental NGOs, and local communities leading the way in best practice in environmental conservation.

The Escazú Agreement shows how this can be done.

A beacon of hope

There's no doubt international collaboration adds challenges to environmental management.

Yet the recent offers a beacon of hope in forming just international environmental agreements that protect both the environment and human rights.

Signing agreements like these is just the first step. Then, we must work to implement them consistently on land or sea, across countries and in a way that's inclusive of local stakeholders.

The world's nations have accepted the idea we must cooperate to combat climate change. We'll also need international collaboration to protect the vast majority of Earth's biodiversity and natural systems.