State of the World's Kelp 26

State of the World's Kelp 26

State of the World's Kelp Forests Report 2026

The "State of the World's Kelp Forests 2026" report offers an in-depth look at one of the planet's most vital yet underappreciated ecosystems. Kelp forests span coastlines across the globe, providing essential services such as carbon sequestration, supporting marine biodiversity, and generating billions of dollars through fisheries and tourism.

Despite their importance, kelp forests face significant threats from climate change, overfishing, and habitat destruction.

This report compiles the latest research and data on the health of kelp forests worldwide, offering insights into the current state of protection and restoration efforts. It also highlights the socio-economic importance of these ecosystems and the urgent need for global conservation efforts to meet the targets set by the Kelp Forest Challenge and the Kunming-Montreal Global Biodiversity Framework.

Whether you're a policymaker, researcher, or environmental advocate, this report provides the knowledge and tools necessary to support kelp forest conservation and restoration. Download it to stay informed and take action to protect these incredible ecosystems.

Report

Forewords


Julianna Sullivan – Port Gamble S’Kallam Tribe yaʔyáʔnəŋ̕ u cxʷ? (Are you listening?) Some of my earliest memories are sitting cross-legged on the floor of my preschool classroom, quietly watching as the grandmothers sang us our songs. In their hands was a rattle made from bull kelp, its rhythm carrying our language, our teachings, and the voices of those who came before us. Though we were taught to listen with respect and intention, there was something about the sound of the kelp rattle and the grandmothers' voices that drew us in. Even as young children, we knew those moments held something sacred. Years later, kelp would carry me far beyond my own shoreline. Kelp introduced me to Indigenous relatives from coastlines I had never walked, whose languages I do not speak, yet whose hearts recognised something familiar in my own. Although our languages, traditions, and coastlines are beautifully distinct, something remarkable happened when we gathered. In every story, every laugh, every song, and every teaching, we found reflections of our own relationships with kelp. What once felt like isolated experiences became part of a much larger story—one that has been unfolding along coastlines around the world since time immemorial. Each gathering felt like drawing water from a deep well. Every person arrived carrying teachings from their own homeland, entrusted to them by their ancestors and communities. As those teachings were shared with humility and received with gratitude, the well grew deeper and purer. No one left with less. Somehow, we all left carrying more. Mi'kmaq Elder Albert Marshall's teaching of Etuaptmumk, or Two-Eyed Seeing, became a guiding light for our journey. One eye recognises the strengths of our Indigenous ways of knowing, the other the strengths of Western science. It is only with both eyes open that we can better understand our kelp forests and find ways to better care for the world around us. As kelp forests face unprecedented challenges, this growing circle of Indigenous kelp stewards reminds us that we are not alone. Across oceans, we are reconnecting to share knowledge, strengthen one another, and remember what the tides have always known—that the ocean connects us all. My hope is that this spirit ripples outward, inspiring us to approach this work with curiosity, humility, and relationships rooted in respect, reciprocity, and care for the living world. w̕ yaʔyáʔnəŋ cn. (Yes, I am listening.) Craig Foster – Sea Change I’m at the tip of Africa in the Great African Seaforest. I watch in awe. A female pyjama shark is attempting to attach one of her eggs to a kelp holdfast by rotating her body around and around to weave the egg case thread into the kelp. Then something happened that I could never have imagined. A male pyjama shark appeared and repeatedly placed his body as protection between the female and any threat. As far as I know, this kind of protective behaviour is unknown in sharks. Once the egg case was safely attached, both sharks moved away. Now the tiny shark would feed on the yolk inside the egg for at least six months before hatching, vulnerable to predation from starfish and whelks. I stared at the newly laid egg and felt a deep vulnerability in myself, because something told me that the survival of this endangered species was woven into my own survival. We feel separate, but that’s not actually the case, as biodiversity health and human health are fundamentally linked. Our future survival depends on our relationship with Mother Nature. Nurturing that relationship is the most important single thing we can do to support life and the coming lives of the next generation. Kelp forests are places on Earth Mother’s body that have great wealth and density of species. They represent reservoirs of hope. They are amongst the most fragile and critical places to look after. Each act of caring and protection is an act of self-care. All our lives, animal and human, rest in her arms.

Report

9.0 Methods


9.1 Expert opinion survey This assessment draws on a structured global survey of kelp forest experts, practitioners, and managers. Participants provided information only for regions where they had substantial knowledge or experience. The survey assessed four aspects of kelp forest conservation: threats and stressors, current conservation action, capacity to respond, and ecosystem benefits. Sixteen indicators were scored using consistent criteria, allowing broad comparisons among regions. Responses were combined to produce regional summaries and to identify places where conservation action and capacity may not be keeping pace with the pressures facing kelp forests. The results represent expert-informed assessments rather than direct measurements of ecological condition or management effectiveness. The number of respondents and the availability of evidence varied among regions, so findings from areas with limited responses should be interpreted cautiously and alongside other available information. 9.2 Kelp protection analysis We estimated how much of the global kelp biome overlaps with marine protected areas and how strong that protection is likely to be. The kelp biome was represented using a global model of potential kelp distribution1, restricted to waters shallower than 60 metres. This captures the broad environmental range in which kelp forests may occur, but it is not a direct map of observed kelp. It may overestimate habitat because it does not account for the availability of rocky reef, while also underestimating kelp distribution in places that were inaccurately modelled. We overlaid this biome layer with two complementary protected-area datasets. The World Database on Protected Areas was used to estimate the overall area of kelp habitat located within designated protected areas. ProtectedSeas’ Level of Fishing Protection dataset was used to assess the strength of fishing restrictions within those areas, with a focus on moderately and highly protected sites. Where protected areas overlapped, each location was assigned to the highest applicable protection category to avoid double-counting. These results indicate the spatial extent and likely regulatory strength of protection, but they do not directly measure enforcement, management effectiveness, or ecological outcomes. Figure 9.1 Overview of the kelp protection analysis. Habitat and protected-area layers are overlaid to estimate spatial overlap. See Section 9.2 for the habitat layer and protection datasets used in this report.