The concept of ''usable knowledge'' is central to sustainability science, but most of the research that explores this concept focuses on the science-policy interface. This paper expands this scholarship by describing a participatory research methodology that aimed to facilitate knowledge sharing between indigenous peoples, and support indigenous community efforts to consider different knowledge claims and negotiate indigenous knowledge that could be used for environmental risk assessments and management responses. We draw on two case studies to show how a participatory mapping approach enabled Aboriginal people connected to the Girringun Indigenous Corporation (Girringun) in northern Australia to negotiate the knowledge needed to assess the environmental risks that affect their territories. Individuals painted and drew maps of their values, knowledge, and management aspirations for water and native vegetation. These maps were shared with the wider group to enable the consideration of different perspectives and the negotiation of agreed risks affecting local watersheds and native vegetation. These maps were also used to facilitate the design of knowledge partnerships among the Girringun tribal groups, staff, and other collaborators that are critical to re-framing and co-managing the environmental risks affecting this region of northern Australia.

In many parts of the world, policymakers, legislators, marine managers, and indigenous peoples have attempted to reconcile marine protected area (MPA) governance and management with indigenous peoples' ancient and ongoing traditional ownership of coastal and marine environments. This paper describes a novel approach in Australia to addressing this challenge through indigenous‐led planning and collaborative governance of holistic coastal land and sea indigenous protected areas (IPAs) based on the indigenous concept of “Country”—traditional land and sea estates and their associated cultural, environmental, and other values. To provide context to this approach, the paper explains the concept of “Sea Country” and provides an overview of the relationship between indigenous peoples and Australia's coastal and marine environments, the legal and policy recognition of Indigenous Sea Country rights and interests, and the engagement of indigenous people in the governance and management of government‐led, legislated MPAs in Australia. The paper then describes the evolution of IPAs from being specifically based on indigenous land tenure to being based more generally on Indigenous Country, across multiple tenures, including marine areas. In recent years, IPAs based on Country have enabled indigenous people to lead planning and governance of land and sea areas over which they have limited legal rights, including over existing national parks and marine parks. Using this approach, some IPAs complement existing protected area governance and management arrangements, whereas elsewhere Country‐based IPAs are adding significantly to Australia's MPA estate. The Dhimurru IPA in the Northern Territory and Girringun Region IPAs in Queensland are presented as examples of this Country‐based approach. This indigenous‐driven, collaborative, nonlegislative approach to dedicating, governing and managing coastal areas and MPAs may serve as a model in other nation states for indigenous people wishing to use a protected area governance framework to support the contemporary management of their traditional marine and coastal estates.

Collaborative problem solving has increasingly become important in the face of the complexities in the management of resources, including protected areas. The strategy undertaken by Girringun Aboriginal Corporation in north tropical Queensland, Australia, for developing co-management demonstrates the potential for a problem solving approach involving sequential initiatives, as an alternative to the more familiar negotiated agreements for co-management. Our longitudinal case study focuses on the development of indigenous ranger units as a strategic mechanism for the involvement of traditional owners in managing their country in collaboration with government and other interested parties. This was followed by Australia's first traditional use of marine resources agreement, and development of a multi-jurisdictional, land to sea, indigenous protected area. In using a relationship building approach to develop regional scale co-management, Girringun has been strengthening its capabilities as collaborator and regional service provider, thus, bringing customary decision-making structures into play to 'care for country'. From this evolving process we have identified the key components of a relationship building strategy, 'the pillars of co-management'. This approach includes learning-by-doing, the building of respect and rapport, sorting out responsibilities, practical engagement, and capacity-building.

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This timely collation of case studies, written by and with Traditional Owners of diverse Australian offshore islands, offers direct insights into benefits arising from strategic and participatory action planning for biocultural island conservation and monitoring. We pay respect to the Old People and Elders whose dedicated care of their island homelands means we today can still experience their cultural and natural diversity. We extend greetings to our Pacifika neighbours, and to carers of islands around Earth. Our paper scopes socio-economic benefits arising from planning for islands, for Aboriginal peoples and Torres Strait Islanders, and more generally. Global, national, state and local co-investments support place-specific planning for some islands by Traditional Owners as a starting point toward shared governance and caring for Country. Case studies describe Country planning for Mayala Country in Australia’s northwest, Woppaburra experiences within the Great Barrier Reef World Heritage Area and integrated biocultural health monitoring arising from remote island Indigenous Protected Area planning in Torres Strait. New institutional initiatives are also seeking to create solid foundations for more substantive island research collaborations. Across Australia, novel relationships grounded in culturally assured, holistically integrated approaches to island governance and caring for Country involving Traditional Owners and island resource users/managers are creating equity in livelihoods and stronger wellbeing. Australia’s innovative Sea Country collaborations, with priorities initiated and led by island Traditional Owners, carry real value for sustained island conservation and provide positive inspirations for global humanity in the accelerating Anthropocene.