Conservation Of Marine Ecosystems Research Articles

Seagrass meadows in the Greek Seas: presence, abundance and spatial distribution

Abstract Combined use of optical (satellite imagery) and acoustic (sidescan sonar) remote sensing techniques, as well as in situ methodologies (visual census; SCUBA diving, Towed Underwater Cameras, and Remotely Operated Vehicles) was employed to map the spatial distribution of seagrass habitats in the coastal waters of the Greek territory. Seagrass meadows were recorded over approximately 70% of the Greek coastline (Eastern Ionian, Aegean and Levantine Seas), and their surface area exceeded 2749.07 km2. Posidonia oceanica is clearly the dominant seagrass species in Greek Seas, covering the vast majority of seabed at depths between the shoreline and 25–30 m (or deeper in insular areas), followed by the species Cymodocea nodosa, Zostera noltei, and Halophila stipulacea, that are not widely distributed but are locally abundant in specific areas. Habitat suitability in terms of the of the seabed that is available for the growth of seagrass meadows (i.e., the spatial extent of coastal areas between the shoreline and the isobath of 20 m) and the seawater clarity conditions are highlighted as the critical factors for the formation of well-structured and extensive meadows. The results of this study are of great importance and usefulness for the effective management and conservation of valuable marine ecosystems and are given in the form of an openly accessible shapefile.

Forecasting shifts in habitat suitability of three marine predators suggests a rapid decline in inter-specific overlap under future climate change.

Understanding how environmental and climate change can alter habitat overlap of marine predators has great value for the management and conservation of marine ecosystems. Here, we estimated spatiotemporal changes in habitat suitability and inter‐specific overlap among three marine predators: Baltic gray seals (Halichoerus grypus), harbor seals (Phoca vitulina), and harbor porpoises (Phocoena phocoena) under contemporary and future conditions. Location data (>200 tagged individuals) were collected in the southwestern region of the Baltic Sea; one of the fastest‐warming semi‐enclosed seas in the world. We used the maximum entropy (MaxEnt) algorithm to estimate changes in total area size and overlap of species‐specific habitat suitability between 1997–2020 and 2091–2100. Predictor variables included environmental and climate‐sensitive oceanographic conditions in the area. Sea‐level rise, sea surface temperature, and salinity data were taken from representative concentration pathways [RCPs] scenarios 6.0 and 8.5 to forecast potential climate change effects. Model output suggested that habitat suitability of Baltic gray seals will decline over space and time, driven by changes in sea surface salinity and a loss of currently available haulout sites following sea‐level rise in the future. A similar, although weaker, effect was observed for harbor seals, while suitability of habitat for harbor porpoises was predicted to increase slightly over space and time. Inter‐specific overlap in highly suitable habitats was also predicted to increase slightly under RCP scenario 6.0 when compared to contemporary conditions, but to disappear under RCP scenario 8.5. Our study suggests that marine predators in the southwestern Baltic Sea may respond differently to future climatic conditions, leading to divergent shifts in habitat suitability that are likely to decrease inter‐specific overlap over time and space. We conclude that climate change can lead to a marked redistribution of area use by marine predators in the region, which may influence local food‐web dynamics and ecosystem functioning.

Marine Protected Areas Management in the Mediterranean Sea—The Case of Croatia

Marine protected areas (MPAs) are widely used tools to conserve marine ecosystems and their services. They are complex socio-ecological systems where human activities and nature interact. Croatia has 409 protected areas, of which 19 are coastal-marine. The aim of this paper is to analyze the management model of MPAs in Croatia and to identify their strengths and weaknesses. For this purpose, three MPAs have been chosen: Brijuni National Park, Telašćica Nature Park, and Pakleni Islands Significant Landscape. The methodology used assesses 26 specific indicators to analyze the status of 4 key factors: management body, planning subprocess, public participation, and implementation subprocess. The results of this evaluation are 5 possible scenarios: proactive (1), learning (2), interactive (3), centralized (4), and formal (5) management. The results show that Brijuni presents a proactive scenario (1), Telašćica an interactive scenario (3), and Pakleni Islands a centralized scenario (4). A series of measures are presented, which can improve the score. In general, MPA management in Croatia tends towards a proactive model, where the management body is its greatest strength. There is a shift from a top-down to a bottom-up approach, which implies a greater involvement of the population in decision-making. However, public participation is not yet fully consolidated.

Multiscale mechanical consequences of ocean acidification for cold-water corals

Ocean acidification is a threat to deep-sea corals and could lead to dramatic and rapid loss of the reef framework habitat they build. Weakening of structurally critical parts of the coral reef framework can lead to physical habitat collapse on an ecosystem scale, reducing the potential for biodiversity support. The mechanism underpinning crumbling and collapse of corals can be described via a combination of laboratory-scale experiments and mathematical and computational models. We synthesise data from electron back-scatter diffraction, micro-computed tomography, and micromechanical experiments, supplemented by molecular dynamics and continuum micromechanics simulations to predict failure of coral structures under increasing porosity and dissolution. Results reveal remarkable mechanical properties of the building material of cold-water coral skeletons of 462 MPa compressive strength and 45–67 GPa stiffness. This is 10 times stronger than concrete, twice as strong as ultrahigh performance fibre reinforced concrete, or nacre. Contrary to what would be expected, CWCs retain the strength of their skeletal building material despite a loss of its stiffness even when synthesised under future oceanic conditions. As this is on the material length-scale, it is independent of increasing porosity from exposure to corrosive water or bioerosion. Our models then illustrate how small increases in porosity lead to significantly increased risk of crumbling coral habitat. This new understanding, combined with projections of how seawater chemistry will change over the coming decades, will help support future conservation and management efforts of these vulnerable marine ecosystems by identifying which ecosystems are at risk and when they will be at risk, allowing assessment of the impact upon associated biodiversity.

Comparison of Marine Ecosystems of Haizhou Bay and Lvsi Fishing Ground in China Based on the Ecopath Model

Recently, under the impacts of environmental shifts and human activities, marine ecosystem conservation and recovery have become increasingly important for the management and sustainable development of fishery resources. We construct two Ecopath models to describe and compare the similarities and differences in the structure and function of the ecosystems in Haizhou Bay (HZB) for 2020–2021 and Lvsi Fishing Ground (LSFG) for 2018–2019 in this study. Our results highlight the similarities of the two ecosystems in which plankton (e.g., zooplankton and phytoplankton) are important functional groups with bottom-up effect control and congers control the top-down effect. The differences between the two ecosystems indicate that the HZB ecosystem is relatively mature due to higher Finn’s cycling index (FCI), Finn’s mean path length (FMPL), Connectance Index (CI), System Omnivory Index (SOI), and Ascendency/capacity (A/C). However the food web structure in the LSFG is more diverse and stable with higher Overhead/capacity (O/C) and Overhead/capacity (H). The differences are possibly due to the low trophic level (TL) species composition in the two ecosystems. Therefore, we suggest that stock enhancement and release methods should be deployed to release high TL species into designated water areas to increase food web complexity and ecosystem maturity in HZB and LSFG. This study will help inform ecosystem and fishery regulations in different ways and facilitate discussion towards the establishment of strategic conservation planning and adaptive management.

Evidence for spatiotemporal shift in demersal fishery management priority areas in the western Mediterranean

Marine protected areas (MPAs) are a promising management tool for the conservation and recovery of marine ecosystems, as well as fishery management. MPAs are generally established as permanent closures but marine systems are dynamic, which has generated debate in favour of more dynamic designs. As a consequence, the identification of priority areas should assess their persistence in space and time. Here, we develop a step-by-step approach to assess the spatiotemporal dynamics of fishery management priority areas using standard fishery-independent survey data. To do so, we fit Bayesian hierarchical spatiotemporal SDM (species distribution model) models to different commercially important demersal species and use the resulting maps to fit different spatial prioritisation configurations. The proposed method is illustrated through a western Mediterranean case study using fishery-independent trawl survey data on six commercially important species collected over 17 years. We use these results to assess the spatiotemporal dynamics of fishery priority areas. We identified two fishery priority area patterns in the study area, each predominant during a different time period of the study, asserting the importance of regularly reassessing MPA designs.

Integrated systems in the world aquaculture: the experience of millennia for the benefit of the whole world

The article reveals the meaning and essence of the concept of multitrophic systems in aquaculture; provides an overview of historical information on ancient integrated agro-aquatic systems; considers examples of multitrophic agro-aquatic systems in the UNESCO World Heritage List and in the Globally Important Agricultural Heritage Systems (GIAHS). Current issues and current ways of preserving unique agro-aquatic systems in different regions of the world are discussed; the main principles and current options of polyculture application in hydrobionts breeding, as well as the importance of multitrophic technologies in world aquaculture are discussed. It is concluded that the development of multitrophic agro-aquatic systems is one of the most promising options for the interaction of water management and the agricultural sector. At the same time, the implementation of this concept of environmental management is fully consistent with the international principles of the green economy, the tasks of resource conservation, ensuring stable growth of food production and creating conditions for sustainable development. In general, this direction ensures the achievement of at least nine of the seventeen UN declared Sustainable Development Goals, in particular, such SDGs as: hunger eradication, good health and well-being, affordable and clean energy, decent work and economic growth, industrialization, innovation and infrastructure, responsible consumption and production, conservation of marine ecosystems, conservation of terrestrial ecosystems, partnership for sustainable development [16]. The support and development of multitrophic agro-aquatic systems affect not only the overall efficiency of environmental management, but also have an impact on the socio-economic sphere — in particular, through the activation of international tourism. In turn, tourism, in addition to expanding the service sector, ensures the preservation of accumulated knowledge about unique technologies of environmental management and makes a significant contribution to the preservation of these systems by increasing people’s awareness of the traditions of various cultures.

Coping with heatwaves: How a key species of seaweed responds to heat stress along its latitudinal gradient

Marine heatwaves (MHWs) frequency and intensity are increasing around the globe, affecting marine ecosystems’ structure and functioning. Understanding how key marine species respond to these short-term extreme events is urgent for predicting damage to coastal ecosystems. Hypnea pseudomusciformis presents distribution in different floristic provinces on the Brazilian coast: tropical, transition and warm-temperate. Here, we evaluate the effects of simulated heatwaves on H. pseudomusciformis populations by measuring the changes in algal growth, pigment content, and photosynthesis. Based on data for the last four decades, we characterized the MHW patterns for each of the three collection sites. Perturbation levels were identified as average intensity heatwave (Δ +2 °C), maximum intensity heatwave (Δ +4 °C) and extreme intensity heatwave (Δ +6 °C), with an average duration of seven days. Based on growth rate data, corroborated with measurements of photosynthesis fluorescence and pigment contents. H. pseudomusciformis populations exhibit distinct tolerance and physiological responses to MHWs. The tropical and transition specimens were affected by Δ + 4 °C and Δ + 6 °C MHW scenarios, while the warm-temperate specimens was the only one to recover in all the MHW scenarios tested. These data are worrisome under a global warming scenario and an increase in MHWs, indicating that tropical and transition specimens of H. pseudomusciformis may be at risk of local extinction. This knowledge will be fundamental in driving any future management intervention or policy change for the conservation of marine ecosystems.

Mapping the macrofauna communities of Portugal's continental shelf north of Nazaré Canyon using Community Distribution Modelling (CDM)

The conservation and sustainable use of marine ecosystems is a worldwide concern, and to achieve it, managers and decision-makers require detailed environmental and biological information, namely supplied as maps of the seafloor. This work was conducted on Portugal's continental shelf located north of Nazaré Canyon. Sediment data was obtained in 226 grab samples, of which 169 were used to study the macroinvertebrate benthic communities. Acoustic transects were run for more than 2500 Km to obtain depth and maps of environmental variables were produced through spatial interpolation of the point data. A multivariate analysis of the biological data identified seven benthic communities, characterized by different species and environmental conditions (i.e., sediment type and depth). The spatial distribution of each biological community was modelled as the response to environmental variables using generalized linear models with a binomial distribution. Depth was the variable more often significantly related to the distribution of the benthic communities, selected in 5 of the 7 Community Distribution Models (CDM). Using the CDM expressions and maps of the environmental variables, probability maps were produced for the distribution of each community. Their combination allowed to obtain a final map of the most probable benthic communities throughout the study area, showing a high agreement (81%) between the observed and the predicted distributions. The maps produced in this study are valuable tools for the decision-making process involved in the management of the marine environment and their resources, for instance to classify these habitats according to the European nature information system (EUNIS) and in the scope of the Marine Strategy Framework Directive.

“Please let me visit”: Management options for marine ecosystems in a Mediterranean Marine Protected Area

Designation of Marine Protected Areas (MPAs) as a means to support conservation of marine ecosystems is expected to depend on local communities and stakeholder’ participation and support. This paper presents the preferences of residents of Malta for measures intended to protect Posidonia oceanica seagrasses and coralligenous formations from threats from the anchoring and mooring of vessels in an offshore MPA area. The results indicate that only the most modest of restrictions increase the economic welfare of residents as participants are, overall, against further restrictions to enter the MPA. Survey participants wish to see an increase in provisioning ecosystem services such as fish caught and increases in carbon sequestration and are willing to pay to secure such benefits. Respondents also appear to have individualistic and use-driven values as a result of interacting with the MPA while past experiences play an important role in preferences, with frequent visitors strongly objecting to further restrictions to entry. The good current condition of the seagrass beds might explain the rejection of stringent restrictions but fails to account for threats from climate change and projected increase in tourism vessels’ visits. Such findings make co-operation and appropriate communication of threats and policies for management of marine resources through MPAs to the public more imperative.

Safeguarding marine life: conservation of biodiversity and ecosystems

Marine ecosystems and their associated biodiversity sustain life on Earth and hold intrinsic value. Critical marine ecosystem services include maintenance of global oxygen and carbon cycles, production of food and energy, and sustenance of human wellbeing. However marine ecosystems are swiftly being degraded due to the unsustainable use of marine environments and a rapidly changing climate. The fundamental challenge for the future is therefore to safeguard marine ecosystem biodiversity, function, and adaptive capacity whilst continuing to provide vital resources for the global population. Here, we use foresighting/hindcasting to consider two plausible futures towards 2030: a business-as-usual trajectory (i.e. continuation of current trends), and a more sustainable but technically achievable future in line with the UN Sustainable Development Goals. We identify key drivers that differentiate these alternative futures and use these to develop an action pathway towards the desirable, more sustainable future. Key to achieving the more sustainable future will be establishing integrative (i.e. across jurisdictions and sectors), adaptive management that supports equitable and sustainable stewardship of marine environments. Conserving marine ecosystems will require recalibrating our social, financial, and industrial relationships with the marine environment. While a sustainable future requires long-term planning and commitment beyond 2030, immediate action is needed to avoid tipping points and avert trajectories of ecosystem decline. By acting now to optimise management and protection of marine ecosystems, building upon existing technologies, and conserving the remaining biodiversity, we can create the best opportunity for a sustainable future in 2030 and beyond.

Perceptions of ecosystem services and disservices associated with open water swimming

Open water swimming is becoming an increasingly popular recreational activity. Understanding the human well-being benefits that open water swimmers derive from interaction with outdoor spaces is fundamental to environmental decision making, yet little is currently known about the benefits, threats and needs of open water swimmers in relation to the environments they swim in. In this study we provide a balanced assessment of the perceived cultural ecosystem services (CES) and ecosystem disservices (EDS) experienced by open water swimmers in the UK. Factor analysis based on an online questionnaire with 505 respondents revealed three distinct clusters of CES benefits that contribute to human well-being (‘spiritual value and interaction with nature’, ‘mental and physical health’, and ‘social bonds’). Swimming frequency, site type, gender and whether respondents were members of environmental groups affected response patterns towards CES benefits. There were five distinct clusters of EDS (‘natural hazards’, ‘security and safety (health)’, ‘security and safety (weather)’, ‘recreation’ and ‘material (biotic and abiotic)’. Key EDS ranked as an issue (by more than 50% of respondents) related to water quality, currents, rubbish and litter in water bodies and boat traffic. Swimming duration, age and swimming frequency in particular affected response patterns surrounding EDS, and to a small extent the site type. The results can be used to support the effective implementation of national and international policy, which aims to improve human well-being through encouraging use of outdoor spaces, whilst promoting the conservation and sustainable use of freshwater and marine ecosystems. The results of this study support effective ecosystem management of aquatic environments used by recreational open water swimmers through: - Facilitating the inclusion of cultural ecosystem services/ ecosystem disservices experienced by open water swimmers in management planning - Identifying the main human well-being benefits experienced by open water swimmers when interacting with waterbodies and demonstrating that these vary depending on the demographics of the recreational user, and characteristics of the recreational activity - Understanding the main ecosystem disservices experienced by open water swimmers and identifying management actions to address these - Providing a framework that can be used for similar assessments

Ocean Sound Propagation in a Changing Climate: Global Sound Speed Changes and Identification of Acoustic Hotspots

AbstractClimate change is a relevant threat on a global scale, leading to impacts on ecosystems and ocean biodiversity. A considerable fraction of marine life depends on sound. Marine mammals, in particular, exploit sound in all aspects of their life, including feeding and mating. This work explores the impact of climate change in sound propagation by computing the three‐dimensional global field of underwater sound speed. The computation was performed based on present conditions (2006–2016) and a “business‐as‐usual” future climate scenario (Representative Concentration Pathway 8.5), identifying two “acoustic hotspots” where larger sound speed variations are expected. Our results indicate that the identified acoustic hotspots will present substantial climate‐change‐induced sound speed variations toward the end of the century, potentially affecting the vital activities of species in the areas. Evidence is provided of the impact of such variation on underwater sound transmission. As an example of a species impacted by underwater transmission, we considered one marine mammal endangered species, the North Atlantic right whale (Eubalaena glacialis), in the northwestern Atlantic Ocean. To the best of our knowledge, this is the first global‐scale data set of climate‐induced sound speed changes expected under a future scenario. This study provides a starting point for policies oriented research to promote the conservation of marine ecosystems and, in particular, endangered marine mammals.

Same but different? Zoantharian assemblages (Anthozoa: Hexacorallia) in Bonaire and Curaçao, southern Caribbean

Marine community datasets are key to the effective management and conservation of marine ecosystems, including coral reefs, which are increasingly threatened by a myriad of stressors. Although community information exists for many comparatively well-studied taxa, other common groups remain to be examined for even such basic information. In this study, we report on the zoantharian communities (Cnidaria: Anthozoa: Hexacorallia: Zoantharia) on the reefs of Bonaire in the southern Caribbean, and compare current results from 30, 20, 10, and 5 m depths to recent similar surveys from nearby Curaçao. The surveys revealed a total of 17 zoantharian species and epibiotic associations on the reefs of Bonaire. Additionally, results showed that while zoantharian assemblages around Bonaire at shallow 5 and 10 m depths, dominated by Palythoa spp., were similar to those found on Curaçao, diversity and numbers of zoantharians were higher at 20 and 30 m due to more abundant epibiotic Parazoanthidae species associated with sponges. Differences in assemblage structure were seen in deeper 20 and 30 m depths between the two islands, implying that conservation of deeper reef slopes, or along depth gradients, may need to be independently considered and addressed for each location. Analyses with environmental parameters on the Bonaire dataset indicate the potential importance of coral reef rugosity and physical structure in shaping these zoantharian communities, aspects that should be focused on in more detail in future research.

Alternative Conservation Paradigms and Ecological Knowledge of Small-Scale Artisanal Fishers in a Changing Marine Scenario in Argentina.

We studied conservation paradigms of small-scale artisanal fishers and other actors involved in the conservation of the Bahía Blanca Estuary (BBE)—a Southwestern Atlantic estuary under anthropogenic pressures (conservationists, NGOs, individuals in the private sector and the port consortium). We focused on the relationship between fishers and non-human entities (e.g., animals, tides, lunar cycles, etc.) from alternative conservation paradigms according to Pálsson’s schema (orientalism, paternalism, communalism). We also explored the ecological knowledge of fisher communities to identify possible conservation strategies. Using an ethnographic approach, we identified communalism as the dominant paradigm within the fisher communities as opposed to the paternalistic and orientalist approaches of conservationists and industry employees in the BBE. Fishers demonstrated a broad knowledge on the effects of climate change on fish stocks and pollution on ocean environments and biota, which gillnets avoid catching juveniles and threatened species, and landscape changes over the long-term period, among others areas that could be useful for conservation of these changing coastal ecosystems. We conclude that understanding local perspectives and practices is essential for a democratic exchange among different bodies of knowledge to conserve marine ecosystems.

Seaweeds influence oyster microbiota and disease susceptibility.

A growing awareness of role that microbiota can play in mediating the effects of pathogens on hosts has given rise to the concept of the pathobiome. Recently, we demonstrated that the Pacific oyster mortality syndrome affecting Crassostrea gigas oysters is caused by infection with the Ostreid herpesvirus type 1 (OsHV-1) followed by infection with multiple bacterial taxa. Here we extend the concept of this pathobiome beyond the host species and its bacterial microbiota by investigating how seaweed living in association with oysters influences their response to the disease. We hypothesized that by their mere presence in the environment, different species of seaweeds can positively or negatively influence the risk of disease in oysters by shaping their bacterial microbiota and their immune response. Although seaweed and oysters do not have direct ecological interactions, they are connected by seawater and likely share microbes. To test our hypothesis, oysters were acclimated with green, brown or red algae for 2weeks and then challenged with OsHV-1. We monitored host survival and pathogen proliferation and performed bacterial microbiota and transcriptome analyses. We found that seaweeds can alter the bacterial microbiota of the host and its response to the disease. More particularly, green algae belonging to the genus Ulva spp. induced bacterial microbiota dysbiosis in oyster and modification of its transcriptional immune response leading to increased susceptibility to the disease. This work provides a better understanding of a marine disease and highlights the importance of considering both macrobiotic and microbiotic interactions for conservation, management and exploitation of marine ecosystems and resources.

Guidance for stakeholder consultation to support national ecosystem services assessment: A case study from French marine assessment

In line with international frameworks and following the example of other countries, France conducted a national ecosystem services (ES) assessment in 2012. National assessments are intended to be both comprehensive and useful. In practice, these objectives are conflicting and difficult to reach, leading the experts in charge of the assessment to allocate effort according to their own priorities. In the case of the marine part of the French ES assessment, we consulted stakeholders at the national scale to better connect the assessment to the interest of the end-users. We implemented a participatory approach based on a combination of workshops and online questionnaires. We collected stakeholder’s perception of (i) ES bundle; (ii) hierarchization of issues; (iii) specific issues of concern; and (iv) research needs for different types of marine ecosystems and groups of species. The results of the consultation assisted the assessment process in selecting key issues that necessitate in-depth analysis, and identifying discrepancies between stakeholders’ perceptions and the scientific knowledge that need to be addressed. Stakeholders’ perceptions were also mobilized as an additional source of data to inform decision-makers regarding the state of ecosystems and their ES. In the end, this work underlines the importance of stakeholder’s consultation to support ES assessment and provides guidance for its implementation in the future. Our results can also inform research needs to support the conservation of marine ecosystems.

Editorial: Advances in 3D Habitat Mapping of Marine Ecosystem Ecology and Conservation

Editorial: Advances in 3D Habitat Mapping of Marine Ecosystem Ecology and Conservation

Artisanal Fisher Association Leaders’ Estimates of Poaching in Their Exclusive Access Management Areas

In marine environments, poaching can become a key threat to marine ecosystem conservation. Poaching can occur in marine protected areas and/or in fishery management areas. Unfortunately, understanding the magnitude and characteristics of poaching under community based and co-management governance schemes in coastal and marine environments, has not received the attention it deserves. In Chile, a system of Territorial Users Rights for Fisheries (TURF) has been recognized as one of the largest experiences of small-scale fisheries co-management at a global scale. Currently, poaching is one of the main threats to the TURF system in Chile. In this article, we assessed poaching of a highly valuable benthic resource (Concholepas concholepas) from TURF management areas. We estimated artisanal fisher association leaders’ perceptions of poaching within their TURFs and explore determinants of poaching for Concholepas concholepas. Poaching of Concholepas concholepas showed differences along the studied sites. As expected, the greater abundance of Concholepas concholepas in the management areas generates an increased incentive to poach. Areas that make the greatest investment in surveillance are those most affected by poaching. However, our study cannot determine the effectiveness of current levels of surveillance on illegal extraction. Results show older areas tend to reduce the levels of illegal extraction, which could indicate a greater capacity and experience to control poaching. Supporting fisher associations in enforcing TURFs and following up on sanctions against perpetrators are conditioning factors, highlighted by fisher leaders, for TURF sustainability. The approach used in this study provides insights to prioritize geographies and opportunities to address poaching in small-scale co-managed fisheries.

Сохранение и развитие морских и прибрежных экосистем: полярный фактор

The paper presents an analysis of polar ecological policy actors. From this perspective, authors discuss in detail a role of state in conservation and development of marine and coastal ecosystems. Furthermore, they describe a green agenda for polar regions. At last, some ways for creating of ecological policies in the Arctic and the Antarctic regions, most especially on behalf of sea and marginal ecosystems conservation and evolution, are proposed. One of the most vital parts of such policies is staff training. The authors have attempted a comprehensive analysis of the Green Agenda at the global, national and local levels in terms of the effectiveness of its proposed mechanisms for the protection of biodiversity in polar areas. Researchers have also reviewed plans of Russia according to the new set of strategies for Arctic and Antarctic regions, which were adopted in 2020. The ideas proposed by the authors can be used in a real-case scenario both for strategies implementation and for public discussion on the global ecological problems.