Marine Ecosystem Protection: Strategies for Sustainable Development and Biodiversity Conservation

To Achieve a Sustainable Blue Future, Progress Assessments Must Include Interdependencies between the Sustainable Development Goals

The Blue Economy is an economic framework that integrates economic growth with marine ecosystem sustainability, acknowledging the oceans as vital to global development. The concept gained prominence at the Rio+20 United Nations Conference on Sustainable Development in 2012, emphasizing the need for a sustainable ocean-based economy that balances economic opportunities with environmental conservation and social equity. It encompasses a wide range of sectors, including fisheries, aquaculture, maritime transport, marine biotechnology, renewable energy, and coastal tourism, all of which play a crucial role in global trade, food security, and employment generation. The objective of this paper is to examine the evolution, components, opportunities, and challenges of the Blue Economy while identifying pathways for its sustainable development. The study follows a qualitative approach by analysing existing literature, global policy frameworks, and case studies to evaluate the effectiveness of different ocean-based economic models. Findings indicate that while the Blue Economy presents immense potential for economic growth and employment, it faces several critical challenges, such as overfishing, habitat destruction, climate change impacts, and governance issues. The exploitation of non-living marine resources, such as deep-sea mining and offshore oil and gas extraction, also raises concerns about long-term ecological sustainability. To overcome these challenges, the paper highlights the importance of strong governance frameworks, investment in marine research and technology, and the development of policies that promote sustainable resource management. The role of marine protected areas, sustainable fishing practices, and advancements in renewable ocean energy is emphasized as key strategies for balancing economic benefits with environmental conservation. The private sector, in collaboration with governments and international organizations, must play a central role in driving sustainable investments and innovations. Ultimately, the Blue Economy has the potential to support long-term economic development while preserving marine biodiversity and improving the livelihoods of coastal communities. By adopting sustainable practices, enforcing regulations, and investing in science and data-driven decision-making, nations can harness ocean resources responsibly. This paper underscores the need for an integrated approach that aligns economic growth with environmental stewardship, ensuring that the benefits of ocean-based industries are equitably shared while safeguarding marine ecosystems for future generations.

Forests play a critical role in combating climate change and promoting sustainable development. They are often referred to as the "lungs of the Earth" because they absorb carbon dioxide and release oxygen, making them vital for regulating the planet's climate and supporting life. Forests act as carbon sinks, absorbing and storing significant amounts of carbon dioxide from the atmosphere. Trees, through the process of photosynthesis, convert carbon dioxide into organic matter, which is stored in their biomass and in the soil. This process helps reduce the concentration of greenhouse gases, mitigating climate change. Forests are home to a vast array of plant and animal species. Biodiversity is essential for the stability and resilience of ecosystems. Maintaining healthy and diverse forests helps ensure that ecosystems can adapt to changing environmental conditions and continue to provide ecosystem services that support sustainable development. Forests contribute to climate regulation by influencing temperature, precipitation, and weather patterns. They release water vapor into the atmosphere through a process known as transpiration, which can lead to increased cloud cover and precipitation, thus affecting local and regional climates. Forests play a crucial role in protecting watersheds and maintaining the quality and availability of freshwater resources. Tree roots stabilize soil, reducing erosion and maintaining water quality. Forested areas often act as natural filters, removing pollutants and sediments from runoff. Forests provide livelihoods for millions of people worldwide, especially in rural areas. Sustainable forest management practices can ensure a steady supply of timber, non-timber forest products, and ecosystem services, contributing to the economic well-being of local communities. Forests offer various ecosystem services, including regulating services (climate regulation, water purification, erosion control), provisioning services (timber, fuelwood, non-timber forest products), cultural services (recreation, spiritual value), and supporting services (nutrient cycling, pollination). Adopting sustainable forest management practices is crucial to maintaining the benefits provided by forests. Sustainable logging, afforestation, and reforestation efforts can help maintain and even enhance the carbon sequestration capacity of forests. Recognizing and respecting the rights of indigenous peoples in forest management is essential. Indigenous communities often have valuable traditional knowledge of sustainable forest practices and can play a key role in conservation and sustainable development efforts. Efforts to restore degraded forests and establish new forested areas (reforestation and afforestation) can contribute to climate change mitigation and the protection of biodiversity. Global agreements such as the Paris Agreement and the United Nations Sustainable Development Goals (SDGs) acknowledge the importance of forests in climate action and sustainable development, providing a framework for global cooperation. In conclusion, forests are integral to addressing climate change and promoting sustainable development. Efforts to conserve and sustainably manage forests are essential to achieving environmental, social, and economic goals at both local and global levels. Recognizing the multifaceted benefits of forests and integrating them into climate and development strategies is crucial for a more sustainable and resilient future.

Application of the Ocean Health Index to assess ocean and coastal conditions of the Tokyo Metropolitan area

A decadal outlook for global aquaculture

This study examines the role of cultural tourism and place branding in fostering sustainable tourism development, focusing on community engagement, visitor satisfaction, and environmental awareness. Using Sustainable Development and Cultural Capital theories as the theoretical foundation, the research highlights the long-term benefits of tourism and the significance of local culture and heritage in achieving sustainable outcomes. A quantitative methodology was employed, utilizing Partial Least Squares Structural Equation Modeling (PLS-SEM) to analyze data collected from participants at a cultural festival in Takoradi, Ghana. The findings reveal that place branding significantly impacts sustainable development, both directly and indirectly, through visitor satisfaction. Additionally, cultural tourism promotes sustainable development via community engagement, with environmental awareness moderating the relationship between community engagement and sustainable development. This study offers valuable insights for policymakers and tourism practitioners, emphasizing the integration of cultural assets and community involvement in sustainable tourism strategies. By exploring the interplay between cultural tourism, place branding, and sustainability, the research adds a unique perspective to the field of sustainable tourism development.

Co-development of East African regional water scenarios for 2050

Coral reefs, which serve as essential ecosystems that support marine biodiversity and coastal populations, are declining at an alarming rate worldwide, including in the Philippines. This study explores the specific effects of overfishing, the causes, and effects of pollution on Philippine waters to understand better rising sea levels, ocean acidification, the overall impact of climate change on coral reefs, and the value of these coral habitats to local communities. Data were acquired using a qualitative approach through literature reviews of secondary sources. The findings show that overfishing, pollution, climate change, and habitat destruction are major causes of coral reef decline in the Philippines. These factors have resulted in severe reductions in coral cover, biodiversity loss, and decreased ecosystem services. Furthermore, coral reef decline has far-reaching consequences for Philippine biodiversity, including decreased resistance to environmental stressors and greater vulnerability of coastal people. This study highlights the urgency for coordinated conservation initiatives, such as enhanced management tactics, sustainable fishing practices, and climate change mitigation measures. Recommendations include creating marine protected areas, stronger coastal development rules, and public awareness programs to support coral reef protection. Addressing coral reef loss is crucial for protecting Philippine biodiversity and ensuring the long-term viability of marine ecosystems.

Global decline in capacity of coral reefs to provide ecosystem services

This article delves into the transformative framework known as the “Blue Economy,” underscoring its significance in recognizing and enhancing the economic value of ocean resources while advocating for their sustainable management. The oceans play a foundational role in supporting human life, contributing to essential services such as oxygen production, climate regulation, and food supply. As the world’s oceans are increasingly strained by climate change, pollution, and overfishing, understanding the nexus between ocean health and economic vitality becomes paramount. With ocean-based industries accounting for an estimated $24 trillion in global economic value, it is evident that effective management of marine ecosystems is not just an environmental imperative but a vital economic necessity. The article examines critical international legal frameworks established by the United Nations, such as the 1982 UN Convention on the Law of the Sea, which provides a comprehensive legal structure for the governance and preservation of oceanic resources. It further discusses the recent adoption of the High Seas Treaty, which aims to expand protections for marine areas, and emphasizes the need for countries to collaborate on sustainable practices and policies to address the multifaceted challenges facing the oceans. A thorough analysis reveals the rapid growth of the Blue Economy within regions such as the European Union, which has seen substantial increases in employment and economic output associated with ocean industries. The article identifies key sectors, including marine fisheries, aquaculture, and coastal tourism, that are critical to fostering economic development while maintaining the integrity of marine ecosystems. In response to environmental threats, the authors propose a holistic approach that encompasses seven priority areas for action: 1) National Accounting Systems for Ocean Resources; 2) Territorial Planning of Coastal Marine Areas; 3) Sustainable Management of Fisheries and Aquaculture; 4) Investment in Maritime Infrastructure: 5) Development of Human Capital; 6) Sustainable Practices in Coastal and Deep-Sea Resource Extraction; 7) International Cooperation and Security. These areas serve as strategic categories for future initiatives under a global Blue Economy framework. The article advocates for intensified international collaboration and innovative research to ensure that ocean resources are utilized sustainably and equitably, as well as the establishment of regional programs to enhance cooperative efforts. It underscores the necessity of integrating scientific research into policy-making to address pressing issues such as illegal fishing, marine pollution, and habitat degradation. In conclusion, the authors call for a global approach to ocean governance that transcends national boundaries and emphasizes cooperative, multi-stakeholder initiatives. This collaborative framework is essential for realizing the potential of the Blue Economy while safeguarding marine ecosystems for future generations. The sustained health of our oceans is not only vital for current economic stability but also for the well-being of future generations, making the responsible stewardship of ocean resources a universal priority. Through shared knowledge and commitment to sustainable practices, nations can collectively harness the economic opportunities presented by the Blue Economy while ensuring the protection and resilience of our oceans.

Seaports are a vital part of the maritime transport industry and have a key role in integrated transport chains and regional economies. However, ports are also sites of environmental pollution originating from land-based activities, ship movements and ports’ own activities. It is, therefore, increasingly recognised that economic growth in ports must be balanced with environmental protection and social progress. This has led to enhanced appreciation of the need for sustainable development (SD) in ports. Whilst much has been written about port environmental practices in European and American ports, there is limited synthesis and comparison of sustainable port practices from different parts of the world. Furthermore, in-depth case analysis and critical examination of the practices and challenges of sustainable port development in a globalised era is limited. This paper presents findings from a qualitative multi-case study that aimed to compare sustainable policies and practices of ports in four different continents and to understand the dilemmas, challenges and opportunities they face in attaining SD. This paper reports findings pertaining to the following research questions: (1) What policy frameworks do ports adopt to attain sustainable development? (2) What specific sustainable practices do ports utilise to manage environmental aspects such as air pollution, water quality, ballast water, dredging and disposal of dredged materials, waste disposal, hazardous substances and land/resource use? (3) What are the driving and constraining forces in achieving sustainable development in ports? Port authorities were studied by reviewing documents and secondary data. The following ports were studied: Port of Long Beach (USA), Port of Rotterdam Authority (The Netherlands), Sydney Ports Corporation (Australia) and Transnet Limited that owns and manages South African ports. Findings of the study demonstrate that the SD paradigm has gained momentum, albeit to differing degrees, in the functioning, organisation and the very ethos of case study ports. An important theme from all case studies is that, whilst there is definite progress towards SD, several practices deemed to be sustainable can be controversial and must be critically examined from the perspectives of different stakeholders including shippers, port-related businesses and the local and global community. Lack of data to monitor environmental impacts, economic costs of implementing sustainable practices and complexities of international, regional and national regulations were other constraining factors. On the other hand, reconciling differences between stakeholders and capitalising on economic opportunities, operational efficiencies and cost savings offered by environmental friendliness can advance port SD. Public–private partnerships and policies negotiated by involving all stakeholders were found to foster port sustainability. Most importantly, this study found that, with globalisation, environmental impacts of ports are not always localised. ‘Sustainable’ practices can have unintended consequences in other parts of the world. Therefore, globalisation necessitates a more critical and global analysis of port operations and environment practices in order to be truly sustainable. Although the scope of the research findings is limited to case study ports, the lessons drawn can be constructively applied to any port operating within an institutional system of structured SD.

Potential impacts of climate change on cephalopods in a highly productive region (Northwest Pacific): Habitat suitability and management

Context Tropical regions have exceptional biodiversity and serve as invaluable sources of natural resources, particularly wood (Krainovic et al. 2025). The vast array of tree species in these forests results in significant variations in wood properties, including colour, density, biological durability, hardness, and mechanical strength (Bessa et al. 2023). These diverse characteristics make tropical wood highly versatile, offering numerous applications in construction, manufacturing, chemicals, energy, and beyond. In this context, tropical forests supply some of the most sought-after wood species in the global market, prized for their aesthetic appeal, mechanical properties, and long-term durability – qualities that enhance their commercial value (Richardson et al. 2023). The abundance of forests in tropical regions ensures that wood remains accessible to both urban and rural populations. For centuries, it has been a primary material for construction and cooking fuel, particularly in lower-income areas where alternative materials are scarce or prohibitively expensive (Pipa and Doug 2014). The widespread reliance on wood has led to overexploitation, driven by unsustainable harvesting practices that jeopardise the long-term health of these forests. A significant consequence of this heavy dependence on wood is the alarming rate of deforestation (FAO 2022), which is further exacerbated by illegal logging activities. The unlawful extraction of valuable timber species not only accelerates forest degradation but also undermines attempts to enact legal and sustainable management strategies (Pan et al. 2024). Addressing these challenges requires a strong commitment to research and innovation aimed at promoting the sustainable utilisation of tropical forest resources. Achieving a balance between forest resources demand and forest conservation is essential for ensuring the viability of these ecosystems for future generations. Emphasising technological advancements, enhancing resource efficiency, and adopting responsible forestry practices can help mitigate environmental impacts while creating economic opportunities for local communities. By integrating sustainability into forest management strategies, a harmonious relationship between economic development and long-term ecological preservation can be achieved. In this sense, the primary objective of the International Conference on Tropical Wood (ICTW 2024) conference was to facilitate the exchange of knowledge and best practices that integrate the productive utilisation of wood with the sustainable use of tropical forest resources. The target audience was professors, researchers, students, ministries, and industry professionals. The event aimed to inspire further research and innovations that would enable tropical forests to meet human needs while maintaining the integrity of these vital ecosystems. This conference was organized by the IUFRO (International Union of Forest Research Organizations), in collaboration with the École Supérieure des Sciences Agronomiques and its local academic and institutional partners. As described in figure 1, the conference addressed four main themes: (i) Tropical wood identification and traceability; (ii) Wood usage in construction across tropical countries; (iii) Wood energy in tropical countries; and (iv) Tropical non-timber forest products (NTFPs). Organisation and objectives of the International Conference on Tropical Wood (ICTW 2024) The ICTW 2024 conference was scheduled from the 26th to the 28th of August 2024 in Antananarivo, the capital of Madagascar. It included invited keynotes, voluntary papers, round-table discussions, and field visits. The language of the conference and its publications was English. The conference was organised by the Research Group 5.01.00 “Wood and Fibre Quality” of the IUFRO (International Union of Forest Research Organizations), in collaboration with the École Supérieure des Sciences Agronomiques and the École Supérieure Polytechnique d’Antananarivo of the University of Antananarivo, the École Supérieure Polytechnique d’Antsiranana of the University of Antsiranana, the Institut Supérieur de Technologie Antananarivo, the Centre National de Formation des Techniciens Forestiers Angavokely, and the University of Edinburgh, under the patronage of the Minister of Higher Education and Scientific Research and the Minister of Environment and Sustainable Development. The conference was attended by 106 people (figure 2) from 10 countries, including 4 invited keynotes, 60 voluntary papers and posters, a round-table discussion with local industries and ministries, and a field visit to Mandraka Saha Maintsoanala community forest, approximately 60 km from the capital (figure 3). All presentations were held live and on-site. The scientific program committee believes the selected articles provide a comprehensive overview of the conference’s four following themes: Tropical wood identification and traceability Accurate identification of wood species is essential for sustainable logging practices, as it helps ensure that only specific tree species are harvested, leaving others untouched to preserve biodiversity (Dormontt et al. 2015). Additionally, wood identification is crucial for tracking products along the supply chain, ensuring they are sourced from legal and sustainable origins (Raobelina et al. 2023; Tonouéwa et al. 2024). This session highlighted recent advancements in wood identification methods and traceability systems, focusing on the development of databases and technologies that can support these practices (figure 4). By enhancing wood identification, the industry can better manage resources and improve the sustainability of wood supply chains. Wood usage in construction across tropical countries Wood is widely used in construction across tropical regions, particularly in rural areas where access to other materials is limited. While some examples of tropical wood used in modern multi-story buildings exist (Murphy and Smallwood 2024), most constructions are still traditional, often using wood inefficiently or inadequately (Taleb et al. 2023). The choice of wood species and construction methods is influenced by factors such as material availability, cultural traditions, technical knowledge, and economic considerations. This session discussed the challenges and opportunities related to using wood sustainably in construction, particularly in tropical climates. Key topics included designing wood-based structures suitable for high humidity, heavy rainfall, termites, and other climate-related challenges, as well as improving wood preservation techniques and exploring alternative materials such as bamboo. Wood energy in tropical countries In many tropical countries, firewood and charcoal remain the primary sources of energy for cooking, particularly in rural areas where access to modern energy is limited. This widespread use of traditional fuels contributes significantly to deforestation (Randriamalala et al. 2017; Sedano et al. 2021). To address this, it is essential to improve technologies that reduce reliance on wood-based fuels and promote the use of alternative energy sources. This session focused on innovations in carbonisation techniques, the use of improved cookstoves, improvements in wood energy conversion technologies, and the exploration of alternative fuels such as green charcoal. It also discussed strategies for enhancing wood energy production through sustainable plantation management. Tropical non-timber forest products (NTFPs) Non-timber forest products (NTFPs) have become increasingly important in tropical economies, as they offer an alternative to timber and contribute to the livelihoods of local populations (Ramananantoandro et al. 2013; Shackleton and de Vos 2022). This session focused on the latest advancements in the processing and commercialisation of NTFPs. By creating value-added products from these resources, NTFPs can provide financial benefits to communities while reducing pressure on timber resources. Presentations covered a wide range of NTFPs (essential oils, barks, resins, fruits, and more) and their applications in industries such as pharmaceuticals, food, and chemicals, highlighting their potential for both sustainable forest management and economic development. Strong relationship with the Research Group “Wood and Fibre Quality” of the IUFRO The IUFRO is a global network of forest scientists and researchers focused on advancing knowledge and research related to forests, trees, and their sustainable management. Established in 1892, the IUFRO aims to foster international cooperation among forestry researchers and institutions, promote scientific knowledge, and support the development of sustainable forest management practices worldwide. The IUFRO brings together a wide range of forest-related research disciplines, from ecology to economics, and engages in initiatives that address global challenges such as climate change, biodiversity conservation, and forest health. It organises conferences, workshops, and collaborates with governments, organisations, and stakeholders in the forestry sector to promote evidence-based policy and practices. The organisation’s activities are structured around research groups and working parties that focus on specific areas of forest science, such as wood quality, forest restoration, forest carbon dynamics, and more. Through this collaboration, the IUFRO contributes to global forest sustainability by sharing knowledge and research findings, and fostering innovation in forest science. The Research Group “Wood and Fibre Quality” of the IUFRO, part of the conference organisers, is dedicated to exploring various aspects of wood science, from its formation and structure to its processing and end-use properties. This group aims to deepen the understanding of the fundamental characteristics of wood, which are crucial for its sustainable utilisation. Through research on how environmental conditions, silvicultural practices, and genetics affect wood properties, the group seeks to improve wood and fibre quality for a wide range of applications. The group sponsors regional and international events, including technical meetings, training sessions, workshops, and symposia, which foster communication and collaboration among global experts. The goal of these activities is to share the latest developments in wood science and enhance the quality of research across borders. The Research Group currently has five Working Parties: Wood quality modelling Tree-ring analysis Understanding wood variability Non-destructive evaluation of wood and wood-based materials Fundamental properties of wood and woodbased materials ICTW conference papers published in Bois et Forêts des Tropiques The journal Bois et Forêts des Tropiques (BFT) from the CIRAD publisher was a partner of the conference by being a member of its Scientific Committee. This partnership offers an opportunity to publish a full-length manuscript in a special issue of the Bois et Forêts de Tropiques journal, showcasing notable contributions presented during the conference. Articles in the framework of this special issue will be continuously published in the form of dossiers, inserting them in the table of contents of each following issue. They will be identified with the conference logos. The first article from the ICTW is included in this present issue (BFT N° 361). The article from Ramilison et al. (2024) (figure 5) deals with a comparative analysis of charcoal produced by three carbonisation methods in Madagascar. This research is issued from a PhD thesis work (doctoral student and his supervisors), representing a great example of the ICTW scientific theme “Wood energy in tropical countries”. Acknowledgments The authors thank the ForesTIA project funded by the UK Royal Academy of Engineering, the journal Bois et Forêts des Tropiques published by CIRAD, Global Biodiversity Framework Implementation / Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH Madagascar, the #DigitAg project supported by a public grant overseen by the French National Research Agency (ANR) as part of the “Investissements d’avenir” program (ANR-16-CONV-0004), DP Forêts & Biodiversité, Groupe de Recherche (GDR) Sciences du Bois, G3D2 project funded by the Delegation of the European Union to the Republic of Madagascar and the Union of the Comoros, Biodev Consulting Madagascar, ACEP Madagascar S.A., TELMA Madagascar, Hazovato, Les Scieries du Betsileo, and Tropical Wood, for their support in organizing the conference.

Operationalizing marketable blue carbon

The climate change dialogue has picked up steam in recent months, but it has largely ignored the oceans, in spite of the tremendous service they provide, by absorbing millions of tons of atmospheric CO2 to buffer climate change. Frontiers and other journals have highlighted the impacts of the resulting ocean acidification, but its consequences demand a lot more attention – not just for the sake of marine ecosystems, but for our own sake as well. National Oceanic and Atmospheric Administration scientist Richard Feely aptly called ocean acidification global warming's “evil twin”, likely because of the disturbing trend of decreased pH that has begun to occur throughout the world's oceans. His analogy conjures up a vision of a superhero gone bad, threatening our oceans while society innocently sleeps, which is not so far off. This “evil twin” has the power to cause a far-reaching extinction of corals, both the tropical and deep-water varieties, along with other calcifying marine organisms, which could lead to an epic disruption of ocean ecosystems in this century. The impacts on society would be widespread, ranging from commercial losses in fisheries and tourism, to lost potential for new, life-saving pharmaceuticals that could be derived from marine species. Over time, the storm protection services provided by reefs would disappear – possibly just when they're needed most, as global warming increases storm intensity. Ripple effects will be felt throughout the marine ecosystems, as well as among seabirds and even many terrestrial species – not to mention the aesthetic loss of the vast array of intricate, ornate, colorful reef organisms that inspire awe and wonder, and which we bear an ethical responsibility to preserve for future generations. The need to maintain the economic, ecological, and cultural services that reefs provide has led people to ask, “What will it take for governments to finally do something about it?” Let's face it – we live on a political planet, where action is driven largely by dollars and votes, and decisions are made based on short-term, not long-term, benefits. So if we want governments to do something about ocean acidification, we need to make clear that our dollars and our votes depend on it. According to scientists studying climate change, such as Ken Caldeira, Ove Hoegh-Guldberg, and Jim Hansen, we need to stabilize our atmospheric CO2 levels at about 350 parts per million to prevent the loss of coral reefs. To do this, the Intergovernmental Panel on Climate Change says that countries like the US need to reduce emissions by 25–40% below 1990 levels by 2020 – and another 55% reduction from 1990 levels will be required by 2050. So we are talking about the need to convert to a very low carbon economy relatively quickly. This will be no small feat. The carbon we have been pumping into the atmosphere for free until now will cost us, retroactively. And it cannot be free from here on out, if we hope to solve the problem. Nevertheless, there is a lot we can do now. For example, simply conserving energy could get us a long way toward the 2020 goal. McKinsey and Company, a global leader in business management solutions, have predicted that energy efficiency alone, if achieved economy-wide, could move society 20–30% of the way toward meeting that goal and could “buy time for the nation to develop and deploy the technologies for future low-carbon power production and transport”. In addition, the US Department of Energy says that 20% of US electricity needs could be met by wind power by 2030. Of course, we need to reduce carbon emissions in every sector of our economy – we can't rely on just one or two silver bullets. But saving corals is within reach, if only we can find the political will to do it. So what will it take to muster the political will to finally change our course? It has to start with us. The recent US presidential election has shown that the demands of people can win out over special interests. We need to demand outright that our reefs and ocean ecosystems be saved from ocean acidification. That starts with improved understanding of the problem among elected officials and the public alike, and change will only come if the public creates an environment where politicians understand that it's in their interest to do the right thing. Only then will our political process stand up to global warming's “evil twin” – ocean acidification – and only then will we begin to win the battle to save our oceans.