Delta du Danube
Country
Romania
Inscribed in
1991
Criteria
(vii)
(x)
The conservation outlook for this site has been assessed as "good with some concerns" in the latest assessment cycle. Explore the Conservation Outlook Assessment for the site below. You have the option to access the summary, or the detailed assessment.
Les eaux du Danube se jettent dans la mer Noire en formant le plus vaste et le mieux préservé des deltas européens. Ses innombrables lacs et marais abritent plus de 300 espèces d'oiseaux ainsi que 45 espèces de poissons d'eau douce. © UNESCO
Summary
2025 Conservation Outlook
Finalised on
11 oct 2025
Good with some concerns
Current state and trend of VALUES
Low Concern
Overall THREATS
Overall PROTECTION and MANAGEMENT
Full assessment
Description of values
The largest continuous marshland of Europe and the second-largest delta
Criterion
(vii)
The Danue Delta is a uniquely dynamic relatively wild ecosystem with a rich diversity of wetland habitats. It is the largest continuous marshland of Europe and it is the second-largest and best preserved delta, which probably includes the greatest stretch of reedbeds in the world. The marsh vegetation is dominated by reeds, which form floating or fixed islands of decaying vegetation. Reeds cover some 1,700 km2 and the floating reed islands (plaur) 1,000 km2, whereas the total area not inundated is only 148 km2 (UNEP-WCMC, 2012, IUCN 2014).
Rare and threatened fauna, particularly avifauna
Criterion
(x)
The Danube Delta is a dynamic, relatively wild ecosystem with a rich diversity of wetland habitats, as well as numerous lakes, ponds and marshes, which attract over 300 species of birds and 45 species of freshwater fish. It is the major remaining wetland on the flyway between central and Eastern Europe and the Mediterranean and Middle East and Africa. Of the ca. 312 species of bird that have been recorded, over 176 species breed, the most important being Cormorant (Phalacrocorax carbo), Pygmy Cormorant (Microcarbo pygmeus), White Pelican (Pelecanus onocrotalus), which has 50% of the palaearctic breeding population there, and the globally vulnerable Dalmatian Pelican (Pelecanus crispus) (UNEP-WCMC 2012, IUCN 2017). There are numerous multi-species heron colonies and raptor species, including the globally endangered Saker Falcon (Falco cherrug) and White-tailed Eagle (Haliaeetus albicilla). It is possible that White-headed duck still breed in the area (UNEP-WCMC 2012). Among migratory birds, notable species include several species of swans, both Greater and Lesser White-fronted Geese (Anser albifrons and A. erythropus, the latter globally vulnerable), and large populations of various ducks. The critically endangered Slender-billed Curlew (Numenius tenuirostris) was last recorded there in 1989 (Green 1990). A large part of the wintering population of the globally vulnerable Red-breasted Goose (Branta ruficollis) is found in the Danube Delta (IUCN 2017). There are also important populations of threatened mammals, such as the critically endangered European Mink (Mustela lutreola) and the globally near-threatened Eurasian Otter (Lutra lutra), as well as of herpetofauna, such as the globally vulnerable Meadow viper (Vipera ursinii); the property harbours some 75 fish species, including Russian sturgeon (Acipenser gueldenstaedtii), spiny sturgeon (Acipenser nudiventris) and European sturgeon (Huso huso), which are all critically endangered (UNEP-WCMC 2012, IUCN 2017).
Wetland, river and coastal ecosystems underpinning World Heritage values
The Danube Delta is inscribed on the World Heritage list under World Heritage criteria vii and x only, not under World Heritage criterion ix. However, its World Heritage values are underpinned by the functioning of wetland, river and coastal ecosystems, which therefore constitute important additional biodiversity values of the property.
Assessment information
Climate change, water pollution, illegal fishing, as well as associated intensification of navigation routes, all represent high threats to the biodiversity values of the Danube Delta, as they all have significant implications for the ecosystem's integrity and biodiversity. Hydromorphological alterations in the form of river regulation, channelization, dredging, and dam construction are causing habitat fragmentation, loss of wetland areas, and altered water flow patterns and significantly affect aquatic and riparian species. The development of tourism infrastructure, such as hotels, roads, and recreational facilities, also occurring in sensitive habitats with related increased human activity (boating and other recreational activities) disturbs wildlife and contributes to habitat degradation. These threats are long-standing, persistent and possibly increasing (due to ongoing human interventions for navigation, flood control, and agriculture. Tourism in the Danube Delta is expanding, with more visitors seeking nature-based experiences. Increased frequency of extreme weather events due to global climate change is especially acute in th wetland ecosystems, such as the Danube Delta.
Water-borne & other effluent Pollution
(Water pollution)
Inside site
, Widespread(15-50%)
Outside site
Pollution from untreated wastewater and agricultural runoff is leading to eutrophication and degraded water quality (MMAP, 2023). Pollution carried downstream from catchment of the Danube upstream of the site represents a high threat with the introduction of pesticides, herbicides fertilizers and nutrients, salt, heavy metals and other pollutants causing negative impacts on the site (UNEP-WCMC 2012; MMAP, 2023). Water pollution and the resulting in eutrophication and corresponding algal blooms have had significant negative impact on the ecosystem (Euronews, 2013; Török et al., 2017) and species population dynamics, most notably on fish species, but may also affect piscivorous birds (IUCN, 2020).
Commercial & Industrial Areas, Recreation & Tourism Areas
(Visitor accommodation with associated infrastructure and land-use changes )
Inside site
, Scattered(5-15%)
Outside site
Increasing tourism in the region has been associated with development of accommodation facilities and other associated infrastructure such as expanded transportation networks. The number of hotels and associated infrastructure in the area has increased with concern arising over the sustainability the types of tourism being promoted (WHC, 2007, IUCN Consultation 2017a, b, UNEP-WCMC 2012), also in ecologically sensitive areas, where increased human activity is leading waste and disturbance (increased number of boats with tourists) in protected zones (IUCN, 2020). Habitat fragmentation and destruction is caused both by tourism infrastructure and other infrastructure projects from infrastructure projects and from land-use changes (MMAP, 2023).
Fishing, Harvesting & Controlling Aquatic Species
(Illegal fishing and hunting)
Inside site
, Extent of threat not known
Outside site
Overfishing and unregulated fishing activities is targeting both freshwater and marine species and has an impact to the biodiversity loss (MMAP, 2023). Local, small scale fisheries represent one of the main sources of income for many of the local communities. Infringement of regulations on fishing still occurs despite actions jointly undertaken by various authorities (WHC 2007, IUCN Consultation 2017a, b), and there are concerns over how the fishery is managed (Teodorescu & van den Kommer, 2020). Whilst noted as a threat in this assessment, the lack of fisheries data of relevance to fish populations and ecosystems of the Danube Delta World Heritage site renders this data deficient (IUCN, 2020).
Utility & Service Lines, Shipping Lanes
(River canalization, hydromorpholoical alterations and upstream establishment of water infrastructure)
Inside site
, Scattered(5-15%)
Outside site
Modifications to the riverbanks, navigation channels, and water bodies are affecting the natural hydrology and habitats; sediment imbalance is caused by the human interventions such as dams and dredging (MMAP, 2023).
Past canalization work along the relatively untouched river landscape of the Sfântul Gheorghe branch bypassed river meanders and reduced use of lateral channels. The straightening accelerated the water flow, increased pollution and sedimentation, radically altering the pattern of alluvial deposition (UNEP-WCMC, 2012). This and upstream works which change the discharge dynamics of the Danube river are still affecting the functionality of the overall system through altered erosion and siltation (IUCN Consultation 2017b). The relative increase on Southern branches compared to Chilia Branch leads to increased rate of sedimentation in lakes (Begy et. al. 2018).
Past canalization work along the relatively untouched river landscape of the Sfântul Gheorghe branch bypassed river meanders and reduced use of lateral channels. The straightening accelerated the water flow, increased pollution and sedimentation, radically altering the pattern of alluvial deposition (UNEP-WCMC, 2012). This and upstream works which change the discharge dynamics of the Danube river are still affecting the functionality of the overall system through altered erosion and siltation (IUCN Consultation 2017b). The relative increase on Southern branches compared to Chilia Branch leads to increased rate of sedimentation in lakes (Begy et. al. 2018).
Utility & Service Lines
(Power lines)
Inside site
, Localised(<5%)
Outside site
A number of bird species, including endangered and vulnerable species, are at risk from collision with the many kilometres of electricity powerlines in the delta (UNEP-WCMC, 2012; LIFE Danube Free Sky, 2020), which also affect the aesthetic impression of the landscape. Despite the progress made within the LIFE Danube Free Sky project (2020-2025) (LIFE Danube Free Sky, 2024) on the installation of bird flight diverters and insulation of dangerous poles, the threat from existing power lines to bird species in the Danube Delta still persists (MMAP, 2023).
Recreational Activities
(Disturbance by tourism activities)
Inside site
, Scattered(5-15%)
Outside site
Growing visitor numbers have also resulted in increased number of motors boats and other visitation-related disturbances (IUCN, 2020). To prevent the negative impacts, the Danube Delta Biosphere Reserve Authority has developed Rules for navigation in the Danube Delta which introduced access and speed restrictions (WHC 2007, 2014, IUCN Consultation 2017a, UNEP-WCMC 2012).
Invasive / Other Problematic Species, Genes & Pathogens, Invasive Non-Native/ Alien Species
(Invasive species)
Invasive/problematic species
Corbicula fluminea
Aphanomyces astaci
Orconectes limosus
Pseudorasbora parva
Amorpha fruticosa
Ailanthus altissima
Other invasive species names
Dreissena polymorpha, Theodoxus fluviatilis
Inside site
, Extent of threat not known
Outside site
A number of invasive species have been observed in the Danube, including the Zebra Mussel (Dreissena polymorpha), the river nerite (Theodoxus fluviatilis), and the Asian Clam (Corbicula fluminea), the spread of which is mainly caused by the increasing interconnection of various European water bodies by canals and other waterways (ICDPR, 2014). There have also been reports of introduced, invasive fish species (UNEP-WCMC 2012), and of the crayfish plague, caused by the oomycete Aphanomyces astaci (Schrimpf et al., 2012). Among the invasive species, the following are highlighted as rapidly spreading: Dreissena polymorpha and Orconectes limosus among the aquatic species, Pseudorasbora parva among fish species and Amorpha fruticosa and Ailanthus altissima among plant species (MMAP, 2023). However, information is lacking on the current extent of this threat (IUCN, 2020).
Changes in Temperature Regimes, Changes in Precipitation & Hydrological Regime
(Environmental stress with negative impact on the ecological character of the Delta.)
Inside site
, Throughout(>50%)
Outside site
Rising temperatures and altered precipitation patterns are exacerbating environmental stress and increased frequency of extreme weather events impacting ecosystems and local communities (State Party of Romania, 2024; MMAP, 2023; Nesterenko et al, 2014). The impacts of the climate change include increases in flood and droughts events, rise in Black sea water level leading to erosion and flooding of the coastal areas, thus floodplain ecosystem changes (Nesterenko et al, 2014). An exacerbation of these impacts is previewed for the future and sectors particularly vulnerable include water resources, agriculture and human health (Nesterenko et al, 2014). Based on a vulnerability assessment a transboundary Climate Change Adaptation Strategy and Action Plan for Danube Delta Region (Romania-Ukraine-Moldova) has been developed focussing both on facilitating the adaptation of natural systems and reducing human pressures on ecosystems (Nesterenko et al, 2014)
Uncontrolled development of tourism and climate change is one of the most serious threats to the site’s biodiversity, together with invasive species whose further spread would pose a serious threat to the native fauna of the Danube Delta. Further intensification of navigation, together with alterations of the flow regime and expansion of additional invasive species represent potential significant threats to the site’s integrity, whose extent and impact is however still poorly understood.
Invasive Non-Native/ Alien Species
(Additional invasive species)
Inside site
, Extent of threat not known
Outside site
With increasing navigation and travel, there is a significant but, as yet, difficult to quantify risk that additional invasive species might be introduced.
Shipping Lanes
(Further river canalization)
Inside site
, Extent of threat not known
Outside site
There is a potential threat from planned or proposed construction projects to ease navigation along the lower Danube, such as the Bystroe Canal, which was discussed heavily in the 2003-2008 period (UNEP-WCMC 2012). These might alter the hydrological regime and the functioning of the ecosystem on which the World Heritage values of the site depend.
Recreation & Tourism Areas
(Uncontrolled visitation and access and urbanisation)
Inside site
, Scattered(5-15%)
In line with the global increase in so-called wilderness tourists, the number of tourism service providers is also increasing (e.g. conversion of traditional rural houses into tourist accommodation, thus abandoning the traditional small-scale use of natural resources in exchange for easier and faster earnings from tourism, as well as the number of providers of boat transport to the most remote parts of the Delta) (pers. comm.). The Biosphere Reserve's management has no control over such tourism developments, nor is it able to monitor what is happening on the ground.
Involvement of stakeholders and rightsholders, including indigenous peoples and local communities, in decision-making processes
According to the past Periodic Reports, local communities have some input into discussions relating to management but no direct role in management (State Party of Romania, 2014). A need for more adequate consultation with main stakeholders has been noted (IUCN Consultation, 2017a) within the complex governance arrangement that occur throughout the Delta (Teampău et al., 2020). The updated management plan for the Danube Delta Biosphere Reserve highlights the importance of involving stakeholders and local communities in decision-making processes through regular public consultations on management and conservation plans, supported by education and capacity-building programs to raise awareness among local communities. The management plan also recognizes the dependence of local communities on the delta's natural resources and includes strategies for sustainable development to balance conservation measures with economic needs (MMAP, 2023). However, the effectiveness of the prescribed measures in practice is not monitored and evaluated.
Legal framework
The Danube Delta Biosphere Reserve was established on the basis of Law No. 82/1993, government resolutions and ministerial decrees containing provisions on the designation of protected areas and the management of natural resources, including fisheries. The management of the area is regulated by Emergency Ordinance No. 57/2007 and Rules and Activities for management are prescribed (Danube Delta Biosphere Reserve Authority, 2023). Despite its strengths, the legal framework has certain gaps, such as insufficient resources and personnel for effective enforcement, weak mechanisms to control illegal activities such as poaching and unauthorised development, and it is not always harmonised with local, national and international conservation policies. In the past concerns have been expressed about attempts to change the legislation (The Danube delta law) in order to suit different unsustainable economic interests, with possible legislative changes which would allow tourism in strictly protected areas and provide for some other potential land use changes, as well as possible provide for organic agriculture, including use of some chemicals, which is currently completely prohibited in the Danube Delta (IUCN Consultation, 2020). However, no updated information has been found on the potential change in legislation.
Governance arrangements
The Danube Delta Biosphere Reserve has a dedicated administrative authority tasked with implementing management plan, monitoring biodiversity, engaging stakeholders and implementing conservation laws and regulations. This structure provides a clear mandate for enforcing legal frameworks. However, the most recent Periodic Reporting states that the coordination between administrative bodies involved in the management of the property could be improved (State Party of Romania, 2024).
Integration into local, regional and national planning systems (including sea/landscape connectivity)
The management of the area, based on the provisions in the management plan, is in line with the national strategies of Romania, including the national management plans and the Water Framework Directive (2000/60/EC) and the Floods Directive (2007/60/EC) of the European Union. The management plan takes into account multifunctional measures that combine biodiversity protection with other areas of public policy (e.g. water retention function of floodplains and sustainable agriculture) (MMAP, 2023). However, effective implementation requires greater inter-agency and cross-border coordination to tackle complex, shared environmental problems. Indeed, in the most recent Periodic Reporting states that the coordination between administrative bodies involved in the management of the property could be improved (State Party of Romania, 2024). Balancing economic development (e.g. shipping and tourism) with nature conservation objectives remains a challenge. Limited financial resources and inadequate monitoring systems hinder the comprehensive implementation of integrated projects. There has apparently been cooperation with the management authorities of neighbouring and ecologically connected reserves in Ukraine, but not in Moldova (UNEP-WCMC, 2012). European Structural Funds have been made available to aimed at achieving European standards on the environmental protection and economic development for the broader Danube Delta area, however challenges in remain and the effectiveness of schemes funded through these means could be further optimised (Bostan et al., 2019).
Boundaries
While the boundaries of the Danube Delta Biosphere Reserve are extensive and cover key biodiversity hotspots, there are ongoing concerns about whether they fully encompass all critical habitats, especially in the context of climate change, human activity (especially tourism), and hydromorphological modifications (pers. comm.). Additionally, there are areas outside the reserve that still experience pressures like pollution and habitat fragmentation (MMAP, 2023).
Overlapping international designations
The World Heritage site management authorities also manage the Ramsar site, as well as the Biosphere Reserve (State Party of Romania, 2024). The boundaries of the Danube Delta Biosphere Reserve World Heritage property do not encompass the entire territory of the biosphere reserve; instead, they primarily cover its core zone areas (which is aligned with UNESCO recommendation). The World Heritage Site designation focuses on areas with the highest ecological and conservation value, while the broader biosphere reserve includes core, buffer, and transition zones designed for various levels of protection and sustainable use. The entire Danube Delta Biosphere Reserve area completely overlaps with the Danube Delta Ramsar site (no. 521/1991). The Biosphere Reserve is also part of the Natura 2000 Network (sites no. ROSCI 0065, ROSCI 0066, ROSPA 0031, ROSPA 0076). Danube Delta Biosphere Reserve was also first time awarded with the European Diploma for Protected Areas in 2000. Since then the Diploma was renewed in 2005, in 2010 and again in 2020 for the next 10 years.
Implementation of World Heritage Committee decisions and recommendations
The World Heritage Committee has taken specific decisions on the Danube Delta Biosphere Reserve, in particular: Decision 29 COM 7B.18 (2005) on the Bystroe Canal project in Ukraine and its potential negative impacts on the Danube Delta ecosystem and the World Heritage property in Romania; Decision 32 COM 8D (2008) addressing the need for precise boundary definitions and sizes of the property. Romania provided the necessary clarifications. Since 2009, no decisions or recommendations to be implemented by the State Party have been taken (World Heritage Committee, 2017).
Climate action
Since 2014, the Danube Delta WH site is part of the transboundary Climate Change Adaptation Strategy and Action Plan for Danube Delta region (Romania-Ukraine-Moldova) (Nesterenko, 2014). The plan was developed under the project „Climate proofing Danube Delta through integrated land and water management” co-financed by European Commission, and based on a vulnerability assessment focusses both on facilitating the adaptation of natural systems and reducing human pressures on ecosystems.
As part of the Danube Floodplain Project, more than 125,823 hectares of potential floodplain areas were identified to improve natural water retention and the resilience of the ecosystem. Targeted interventions in aquatic habitats to restore hydrological conditions in heavily modified lakes and channels, such as in the Razim-Sinoe and Dranov areas. The Danube Sediment project deals with sediment transport and deposition to counteract hydro-morphological changes and aims to restore the sediment balance along the Danube. While significant progress has been made, the effectiveness of these measures depends on sustainable funding, cross-border cooperation and integration into broader climate adaptation frameworks (MMAP, 2023).
As part of the Danube Floodplain Project, more than 125,823 hectares of potential floodplain areas were identified to improve natural water retention and the resilience of the ecosystem. Targeted interventions in aquatic habitats to restore hydrological conditions in heavily modified lakes and channels, such as in the Razim-Sinoe and Dranov areas. The Danube Sediment project deals with sediment transport and deposition to counteract hydro-morphological changes and aims to restore the sediment balance along the Danube. While significant progress has been made, the effectiveness of these measures depends on sustainable funding, cross-border cooperation and integration into broader climate adaptation frameworks (MMAP, 2023).
Management plan and overall management system
The World Heritage site is managed by the Danube Delta Biosphere Reserve Authority under the coordination of the Ministry of Environment and Forests (State Party of Romania, 2014). A new comprehensive management plan was adopted in 2023 (MMAP, 2023) and is considered fully adequate to maintain the property's OUV (State Party of Romania, 2024).
Law enforcement
Capacity to enforce legislation and regulations in the World Heritage property was evaluated as acceptable with some remaining deficiencies of enforcement in the most recent Periodic Report (State Party of Romania, 2024). The need for a more effective implementation of laws and management plans in Danube Delta together with a clarification of institutional responsibilities has been noted since (IUCN Consultation, 2017). Persistent problems such as illegal fishing, poaching and unauthorized construction pose a challenge to enforcement efforts. These activities, often in remote areas, may go undetected due to insufficient human, financial and technical resources limiting the ability to monitor the large and ecologically complex protected area (pers. comm.). Involvement of local communities in law enforcement appears limited in the current management plan (MMAP, 2023). This weak cooperation between enforcement agencies, local authorities and stakeholders can lead to inefficiencies in prosecuting violations and implementing remedial measures (pers. comm.).
Sustainable finance
The available levels of funding were assessed as "acceptable" in the most recent Periodic Report (State Party of Romania, 2024). The funding mainly comes from governmental sources, with some additional income from individual visitor charges and international projects (State Party of Romania, 2014). The financial sustainability of the Danube Delta Biosphere Reserve is supported by various funding sources, but faces the challenge of maintaining a stable and adequate flow of funds for its overall conservation and development objectives. The funding for the running costs mainly comes from governmental sources (98%) (State Party of Romania, 2024). Private sector involvement contributes only 2%. However, a significant proportion of funding for projects implementation comes from EU programs, with only 15% from national and local government budgets (State Party of Romania, 2024). The heavy reliance on EU funding raises concerns about the long-term sustainability of projects once these funding cycles have ended. Delays in the disbursement of funds, particularly from national budgets, have led to delays in project implementation.
Staff capacity, training and development
The management of the Danube Delta Biosphere Reserve is hampered by inadequate staffing. Existing staff are responsible for biodiversity monitoring, stakeholder involvement and enforcement. The need for improved professional training is recognized (State Party of Romania, 2024). While a site-based capacity building plan exist it is not fully implemented (State Party of Romania, 2024). Training programs exist, but their frequency and scope are inadequate. It is noted that it is difficult to recruit and retain qualified staff (pers. comm.). Limited funding for training programs restricts opportunities for staff development.
Education and interpretation programmes
A number of education and interpretation programmes exist, but further improvements need to be made to ensure better presentation and interpretation of the Outstanding Universal Value of the property (State Party of Romania, 2014, 2024). Education and interpretation programmes in the Danube Delta Biosphere Reserve include activities to raise public awareness (e.g. special days dedicated to World Water Day or Danube Day); the local press and posts on online platforms are important tools to inform the public. Environmental education activities in local schools and communities and cooperation with academic and research institutions are ongoing.
Tourism and visitation management
Although the Management Plan (MMAP, 2023) for the Danube Delta Biosphere Reserve highlights a number of tools and measures to control the development of tourism and the implementation of tourism activities and visitation in the area, such as a zoning system (which singles out particularly sensitive areas for 'no-go' measures, seasonal restrictions on visiting particularly sensitive areas, visitor monitoring, careful planning of tourism infrastructure, etc.) and a number of support activities for tourism development, which should not harm the biodiversity of the area (e.g. support for eco-tourism initiatives, education and training, stakeholder involvement, etc.), tourism is one of the main threats to the biodiversity of the area and causes severe environmental degradation (habitat destruction, pollution, construction of facilities and infrastructure). Deficiencies in implementing the tourism management strategy have been recognized (State Party of Romania, 2024), and improvements in the visitor use of the property are needed.
Insufficient monitoring and, above all, inadequate control of tourism is largely due to insufficient resources and finances, as well as low levels of public awareness (pers. comm.). Tourism projects, especially those supporting the construction or improvement of infrastructure, often put economic interests before conservation objectives. This situation seems to have worsened in recent years with the increase in visitor numbers.
Insufficient monitoring and, above all, inadequate control of tourism is largely due to insufficient resources and finances, as well as low levels of public awareness (pers. comm.). Tourism projects, especially those supporting the construction or improvement of infrastructure, often put economic interests before conservation objectives. This situation seems to have worsened in recent years with the increase in visitor numbers.
Sustainable use
The Danube Delta Biosphere Reserve Management Plan 2023 emphasizes sustainable resource use as the cornerstone of conservation efforts, to be achieved through the integration of conservation and sustainable use, stakeholder involvement, regulatory measures and monitoring, enforcement and adaptive management. However, overexploitation of natural resources (including poaching, overfishing and logging), limited resources for monitoring and enforcement of environmental laws, lack of support for the development of alternative livelihoods, poverty of the local population and especially unregulated tourism activities are the biggest and strongest obstacles to the sustainable use of natural resources in the Danube Delta Biosphere Reserve (Management Plan, 2023).
Monitoring
Monitoring in the Danube Delta Biosphere Reserve covers certain biological elements, psycho-chemical elements, hydromorphological features and chemical pollutants. Limited financial and technical resources, limited data availability, climatic and seasonal challenges and anthropogenic influences such as tourism, agriculture and infrastructure development affect the accuracy of monitoring and ecosystem restoration efforts (pers. comm.).
Research
The Danube Delta Biosphere Reserve's research priorities are focused to biodiversity conservation, understanding ecosystem services, studying the effects of changing climatic conditions on water levels, species migration, and habitat stability, investigating sustainable fishing, agriculture, and tourism practices that balance economic benefits with conservation and monitoring pollutant levels in water, soil, and biota. Research is conducted through partnerships with universities, research institutions, and conservation organizations Regular fieldwork for sample collection and species monitoring (using technologies like GIS, remote sensing, and drones for spatial analysis) and engaging local communities in citizen science projects (MMAP, 2023). According to the State Party, scientific knowledge about the values of the World Heritage property is sufficient for most key areas but there are gaps; there is considerable research but it is usually not directed towards management needs and/or improving understanding of Outstanding Universal Value (State Party of Romania, 2014, 2024).
Effectiveness of management system and governance in addressing threats outside the site
A legal framework, which defines the reasons for its existence, a management plan that guides the day-by-day operations, an organizational body which gives form to its organizational needs and decision-making, and resources (human, financial and intellectual) are in place. However, the both sustainable long-term financing and staffing are considered inadequate to ensure effective management and delivery of the conservation objectives (IUCN Consultation 2017a, b; pers comm.).
Effectiveness of management system and governance in addressing threats inside the site
Although the management system has a solid foundation and some successes in addressing threats (alignment with international standards, including the UNESCO Man and Biosphere Program and EU legislation such as the Water Framework Directive and Natura 2000 Directives), the zoning system in place, (limited) involvement of local communities and stakeholders in conservation efforts and decision-making processes, and partnerships with international and national conservation organizations to provide technical and financial support, improving enforcement, strengthening management coordination and securing sustainable funding are critical to increasing the effectiveness of the system.
The protection and management of the site includes many positive elements, including recent efforts towards balancing the complex governance systems and land use patterns throughout the Danube catchment, which inevitably effects the ecosystems conserved within the site as well as a wealth of research into the values themselves. However, concerns remain with regards to key areas of the management of the site, i.e. relationship with local people, integration into regional and national planning systems, monitoring, sustainable use, tourism management, and enforcement. More sustainable financing has been a long-standing need to address these aspects of management. The recently proposed legislative changes which would loosen restrictions regarding activities such as tourism in the strictly protected area are of high concern and if approved, carry the potential to negatively impact the values of the site.
The largest continuous marshland of Europe and the second-largest delta
High Concern
Trend
Deteriorating
The marshland is of concern due to a variety of anthropogenic and natural influences. These include changes in water flow due to dams and irrigation projects upstream and the loss of wetlands due to drainage and land reclamation, pollution (nutrient pollution from agricultural runoff leading to eutrophication, pollution from industrial and domestic sources upstream), overfishing, unsustainable hunting, illegal harvesting of resources and introduction of alien species, and especially unregulated tourism. Rising temperatures and changing precipitation patterns affecting ecosystems, as well as the increasing frequency and severity of extreme weather events such as droughts and floods, are the most obvious threats arising from climate change.
Rare and threatened fauna, particularly avifauna
Low Concern
Trend
Stable
Monitoring reports of the Danube Delta biosphere reserve do not report trends in bird abundance and species richness. The “Saving Pelecanus crispus in the Danube Delta” LIFE Project has led to some positive results, including stabilized breeding populations in some sites (Project layman report, 2009). However, a mass mortality event due to H5N1 avian influenza killed 108 Dalmatian pelicans in 2015 (Kiss et al. 2016). A new breeding species (Ruddy Shelduck, Tadorna ferruginea) was reported by the same authors, and some other locally rare species were confirmed to have established breeding populations in the site. As for freshwater fish species, industrial fishing has had a dramatic impact on certain species, such as sturgeon. Despite the introduced fishing ban for these species, a number of species remain under threat. Habitat degradation from hydrological alterations, pollution, invasive species, overexploitation, such as poaching of fish and birds, and illegal harvesting of eggs impact conservation status of rare and threatened fauna. Examples of most threatened bird species with description of the major threats include: Pelecanus crispus (habitat destruction and disturbance), Haliaeetus albicilla (habitat loss and poisoning), Aythya nyroca (wetland drainage and pollution), Chlidonias niger (changes in water levels and habitat degradation, Sturgeon species (overfishing and river modifications), Triturus dobrogicus (habitat fragmentation and water pollution and Lutra lutra (water pollution and habitat disturbance) (MMAP, 2023).
The monitoring results for the Danube Delta Biosphere Reserve by Lupu et al. (2022; 2023) provide an indication of the general trends of key attributes:
In 2023, a decreasing trend of fish resources was noted including migratory stock for Pontic shad. In total 59 fish-species for Danube River and 21 fish-species for Somova-Parcheș lakes-complex were recorded from which 13 were Community Interest species, but missing Romanogobio kessleri antipai with uncertain presence and Umbra krameri, confirming of habitat reduction of this species even in Danube Delta considered the strongest community of Umbra krameri. In the autumn of 2020, 36 species of fish and 2 species of crustaceans (Pontastacus leptodactylus and Eriocheir sinensis) were caught in the river-maritime delta from the Roșu-Puiu lake complex. Overall, the ichthyofauna of the complex is dominated by limnophilous and stagnophilic-reophilous or reophilic-stagnophilic species such as Bilcca bjoerkna (white bream), Alburnus alburnus (bleak), Scardinius
erythrophthalmus (rudd) and Rutilus rutilus (roach), followed by characteristic-associated species. such
as Pelecus cultratus (ziege), Perca fluviatilis (perch), Clupeonella cultriventris (Black Sea sprat),
Rhodeus amarus (bitterling), Leuciscus aspius (asp) and Carassius gibelio (giebel carp), but most
species are sporadic in the complex. There is an increase in the number of species compared to
previous years, but especially the appearance in the Roșu Lake of the Chinese mitten crab (Eriocheir
sinensis) a non-native species that was first recorded relatively recently in the ecosystems of the Danube
Delta. These monitoring results indicate the difficulty of determining the state and trend regarding fish resources.
In regards to waterfowl species a total of 61642–64923 pairs were inventoried in the 2023 season, which is the highest value in the last 5 years for colonial waterbird species populations in the D.D.B.R. Even though the flow of the Danube is strongly controlled by the existing dam system in the river's hydrographic basin, in 2023, due to the greater amount of precipitation, the level remained relatively high in the spring and summer months. This hydrological condition has favored the nesting of marsh tern species (Chlidonias niger, Chlidonias hybrida, and Chlidonias leucopterus), Black-headed Gull (Larus ridibundus), and Common Tern (Sterna hirundo). For three mixed colonies that had disappeared in 2022 (Nebunu, Obretinul Mic, and Pocora-Letea), the hydrological regime facilitated the return of Pygmy Cormorant, Night Heron, and Grey Heron as breeding species in these locations.
In 2020 a total of 140 colonies of waterfowl species (plus an extra 7 probable locations) was found, holding 43193 - 64051 breeding pairs of 26 species. The most abundant species were Great White Pelican (12000 - 15000
pairs), Great Cormorant (9950 pairs) and Pygmy Cormorant (5130-6530 pairs). Followed at a relatively large difference by Night Heron (2740-3840 pairs), Caspian Gull (2955 pairs), Squacco Heron (2100-2900 pairs), Little Egret (1800-2300 pairs) and Common Tern (1829 pairs). The results of field investigations were compared with those of 2019 and previous years showing that there was an absolute minimum of only 1420 pairs for the Whiskered Tern (Chlidonias hybrida), that represent a decrease of almost 6 times the average of 2015-2019 (8155 pairs) and a halving of the nesting numbers from 2019.
The special hydrological conditions recorded during the 2020 breeding season generally favored ichthyophagous bird species in the way that the trophic resource has been more accessible. However, there are also situations in which fish stocks in some areas have decreased and fishing efficiency has not covered the energy needs of all members of the colony. The environmental factors in 2020 breeding season were highlighted by a particularly low water level in spring and early summer and a sharp rise in the level in early July with severe negative influences on the distribution and reproduction of marsh tern species (Chlidonias niger, Chlidonias hybrida, Chlidonias leucopterus), Black-headed Gull and Common Tern, especially in the western part of the Danube Delta where the amplitude of floods is higher. The sudden rise in level in early July led to the abandonment of all colonies of all these species in areas with free flooding regime from the western half of Danube Delta.
Wild fires (especially in March-May) are a significant threat for populations of reed-breeding species (Ardea cinerea, Ardea purpurea and Ardea alba). Musura Island present a similar case with Ceaplace Island, so there is a strict corelation between the size of the colonial waterbirds breeding populations the available nesting surface and the degree of disturbance in the colonies. The Romanian sector of Musura Island registered the largest number of nesting pairs of Pallas’s Gull (Larus ichthyaetus) observed so far, respectively 270 pairs.
The monitoring results for the Danube Delta Biosphere Reserve by Lupu et al. (2022; 2023) provide an indication of the general trends of key attributes:
In 2023, a decreasing trend of fish resources was noted including migratory stock for Pontic shad. In total 59 fish-species for Danube River and 21 fish-species for Somova-Parcheș lakes-complex were recorded from which 13 were Community Interest species, but missing Romanogobio kessleri antipai with uncertain presence and Umbra krameri, confirming of habitat reduction of this species even in Danube Delta considered the strongest community of Umbra krameri. In the autumn of 2020, 36 species of fish and 2 species of crustaceans (Pontastacus leptodactylus and Eriocheir sinensis) were caught in the river-maritime delta from the Roșu-Puiu lake complex. Overall, the ichthyofauna of the complex is dominated by limnophilous and stagnophilic-reophilous or reophilic-stagnophilic species such as Bilcca bjoerkna (white bream), Alburnus alburnus (bleak), Scardinius
erythrophthalmus (rudd) and Rutilus rutilus (roach), followed by characteristic-associated species. such
as Pelecus cultratus (ziege), Perca fluviatilis (perch), Clupeonella cultriventris (Black Sea sprat),
Rhodeus amarus (bitterling), Leuciscus aspius (asp) and Carassius gibelio (giebel carp), but most
species are sporadic in the complex. There is an increase in the number of species compared to
previous years, but especially the appearance in the Roșu Lake of the Chinese mitten crab (Eriocheir
sinensis) a non-native species that was first recorded relatively recently in the ecosystems of the Danube
Delta. These monitoring results indicate the difficulty of determining the state and trend regarding fish resources.
In regards to waterfowl species a total of 61642–64923 pairs were inventoried in the 2023 season, which is the highest value in the last 5 years for colonial waterbird species populations in the D.D.B.R. Even though the flow of the Danube is strongly controlled by the existing dam system in the river's hydrographic basin, in 2023, due to the greater amount of precipitation, the level remained relatively high in the spring and summer months. This hydrological condition has favored the nesting of marsh tern species (Chlidonias niger, Chlidonias hybrida, and Chlidonias leucopterus), Black-headed Gull (Larus ridibundus), and Common Tern (Sterna hirundo). For three mixed colonies that had disappeared in 2022 (Nebunu, Obretinul Mic, and Pocora-Letea), the hydrological regime facilitated the return of Pygmy Cormorant, Night Heron, and Grey Heron as breeding species in these locations.
In 2020 a total of 140 colonies of waterfowl species (plus an extra 7 probable locations) was found, holding 43193 - 64051 breeding pairs of 26 species. The most abundant species were Great White Pelican (12000 - 15000
pairs), Great Cormorant (9950 pairs) and Pygmy Cormorant (5130-6530 pairs). Followed at a relatively large difference by Night Heron (2740-3840 pairs), Caspian Gull (2955 pairs), Squacco Heron (2100-2900 pairs), Little Egret (1800-2300 pairs) and Common Tern (1829 pairs). The results of field investigations were compared with those of 2019 and previous years showing that there was an absolute minimum of only 1420 pairs for the Whiskered Tern (Chlidonias hybrida), that represent a decrease of almost 6 times the average of 2015-2019 (8155 pairs) and a halving of the nesting numbers from 2019.
The special hydrological conditions recorded during the 2020 breeding season generally favored ichthyophagous bird species in the way that the trophic resource has been more accessible. However, there are also situations in which fish stocks in some areas have decreased and fishing efficiency has not covered the energy needs of all members of the colony. The environmental factors in 2020 breeding season were highlighted by a particularly low water level in spring and early summer and a sharp rise in the level in early July with severe negative influences on the distribution and reproduction of marsh tern species (Chlidonias niger, Chlidonias hybrida, Chlidonias leucopterus), Black-headed Gull and Common Tern, especially in the western part of the Danube Delta where the amplitude of floods is higher. The sudden rise in level in early July led to the abandonment of all colonies of all these species in areas with free flooding regime from the western half of Danube Delta.
Wild fires (especially in March-May) are a significant threat for populations of reed-breeding species (Ardea cinerea, Ardea purpurea and Ardea alba). Musura Island present a similar case with Ceaplace Island, so there is a strict corelation between the size of the colonial waterbirds breeding populations the available nesting surface and the degree of disturbance in the colonies. The Romanian sector of Musura Island registered the largest number of nesting pairs of Pallas’s Gull (Larus ichthyaetus) observed so far, respectively 270 pairs.
Assessment of the current state and trend of World Heritage values
Deteriorating
The state of the marshland habitat is of concern due to the compounding effects of human activities and climate change and the insufficient resources for enforcement and restoration. However, the results for avifauna and ichthyofauna are more nuanced. While some populations have shown stable trends and even significant increases, others have declined significantly. Nevertheless in some cases recovery in breeding populations were observed in following years. Therefore the overall state of rare and threatened fauna is considered low concern currently. Climate change impacting hydrological regimes and affecting water level can have significant impacts on breeding success. Additionally, wildfires present an important threat for reed breeding species.
Assessment of the current state and trend of other important biodiversity values
High Concern
Stable
The Danube Delta Biosphere Reserve has important cultural (traditional fishing, reed harvesting and handicrafts), economic (fishing, agriculture and ecotourism) and recreational values. The other values and attributes of the Danube Delta Biosphere Reserve are of significant conservation concern, mainly due to the erosion of cultural heritage and traditional practices, unsustainable economic activities affecting livelihoods and environmental health, poorly managed tourism exacerbating habitat degradation, and increasing pressure from climate change and socio-economic dynamics.
Additional information
Fishing areas and conservation of fish stocks
Fishing represents an important source of income for local communities. However, better enforcement of fishing regulations is needed (IUCN Consultation 2017a, b).
Outdoor recreation and tourism
The site is major tourism destination for national and international tourists (WHC 2014, IUCN Consultation 2017a, b).
Sustainable extraction of materials (e.g. coral, shells, resin, rubber, grass, rattan, etc)
Reed as building material is an important benefit for local and national beneficiaries (IUCN Consultation 2017a).
Wilderness and iconic features,
Cultural identity and sense of belonging
The Danube Delta provides ample cultural services and has supported the production of numerous works of art (IUCN Consultation 2017a).
Importance for research
The delta also is a pilot area for research and education (IUCN Consultation 2017b).
Carbon sequestration,
Water provision (importance for water quantity and quality)
The Danube Delta contributes to purification of water, carbon sequestration and climate regulation (IUCN Consultation 2017a)
The landscapes and ecosystems of the Danube Delta provide a wide range of supporting, provisioning, regulatory and cultural ecosystem services, which offer ample benefits to local and national inhabitants as well as international visitors, in terms of food and building materials, tourism and recreation, the production and dissemination of art and knowledge, as well as the maintenance of a healthy living environment.
| № | Organization | Brief description of Active Projects | Website |
|---|---|---|---|
| 1 | Danube Delta National Institute for Research and Development | Data Deficient |
www.ddni.ro
|
| 2 | Romanian Ornitological Society | Data Deficient |
www.sor.ro
|
| 3 | WWF Danube Carpathian Programme Romania, Danube Biosphere Reserve Ukraine, Center for Regional Studies Ukraine, NGO | Project co-financed by the European Commission and implemented by WWF Danube Carpathian Programme Romania, Danube Biosphere Reserve Ukraine, Center for Regional Studies Ukraine, NGO | |
| 4 | Rewilding Europe | Working with partners, the rewilding team is working to significantly improve the ecological integrity and natural functioning of 40,000 hectares of wetland and terrestrial delta habitat, using rewilding principles at on a landscape scale. |
https://rewildingeurope.com/areas/danube-delta/
|
| 5 | mproving water management to restore and maintain ecological balance in the region, with a focus on reducing pollution and ensuring sustainable use of resources. | Improving water management to restore and maintain ecological balance in the region, with a focus on reducing pollution and ensuring sustainable use of resources. |
N/A
|
| 6 | Local NGOs, research institutes, and international biodiversity conservation organizations. | Enhancing the conservation status of flora and fauna, particularly addressing invasive species and habitat restoration. |
N/A
|
| 7 | Ministry of Tourism, local businesses, and international ecotourism bodies. | Balancing tourism growth with ecological sustainability, including infrastructure improvements and visitor education. |
N/A
|
| 8 | DDBRA, DDNI | The Danube Delta Biosphere Reserve (DBBR) is the richest fish area in our country. The fish fauna of the reserve also includes anadromous species that migrate up the Danube from the Black Sea to spawn, such as the cod (Huso huso), the sturgeon (Acipenser gueldenstaedtii), the trout (Acipenser stellatus), rare, protected species that need 10-15 years to reach maturity and reproduce. The cega (Acipenser ruthenus) is also a species of sturgeon, but an exclusively freshwater fish that reaches maturity at 4-5 years to reproduce. The Danube mackerel (Alosa pontica) and the shad (Alosa tanaica) are also anadromous species that migrate from the Black Sea to the Danube in early spring to spawn. All these fish species are studied and inventoried in this project. |
https://statiesturioni.ddbra.ro/despre-proiect
|
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