about us


Site general description
Situated on the Bulgarian side of the Danube river between the 391 and the и 393 km, at 18 km from Silistra. Coordinates: N 44.06.52 E 27.04.41; UTM grid NJ 08. Altitude: 10 - 111 m. Area: 902,1 ha (reserve), 600 ha (of Ramsar place), 602 ha (Biosphere reserve). In 1942 the lake “Srebarna” was declared a protected site, in 1948 it has declared as a Natural reserve, and in 1977 it became a biosphere reserve. In 1985 Srebarna was put on UNESCO list.

Ecosystem characterization
“Srebarna” is a eutrophic lake. It is inhabited by many plant and animal species. Some of the bird species (Pelecanus crispus, Phalacrocorax pygmeus) are rare or endangered. The biological diversity of Srebarna is very high. There were established 1116 genera and 2748 taxa, belonging to 47 classes and 24 phyla (Michev et al. 1998). According to Corine Biotope Project there are 13 types of habitats.

Available data and parameters
From 1998 ecological monitoring is being carried out by CLGE in Srebarna. Different biotic and abiotic parameters are being monitored (see Table).

Expected additional parameters and indicators
This is a site which can be a hot spot for socio-ecological studies in the context of the LTSER platform of LTER-EUROPE

Responsible Institution – Central Laboratory of General Ecology - BAS

Site coordinator & reference person

Assoc. Prof. Dr. Luchezar Pehlivanov
1113 Sofia, 2, Yuri Gagarin str.
Phone:+359 2 8717195
Fax: + 359 2 8705498
E-mail: lzp@ecolab.bas.bg

CLGE has a research laboratory with only basic field equipment and a living house.

Research projects and funding institutions
  • Caracterization of the ichthyofauna in different types of water bodies as indicator for the state of hydroecosystems – BAS
  • Identifying important herpetological areas with European significance in Bulgaria – BAS
  • Ecology and migration of Pelicanus crispus Bruch in Bulgaria – BAS
  • Interrelationship models of neighbouring lotic and lentic ecosystems in the processe of recovery and development of aquatic communities in wetlands of the Lower Danube terrace, NSF- B1307
  • Biotopic distribution and communities of terrestrial small mammals in the region of the Srebarna Biosphere Reserve – NSF- B1316
  • Complex ecological monitoring of the Srebarna Biosphere Reserve since 2001– MOEW 2854
  • Structure, distribution and dynamic of the zooplankton in the Srebarna Biosphere Reserve – (with Ukraine) – Bilateral project MES
  • Mapping of reed islets around the breeding place of Pelicanus crispus Bruch in the Srebarna Biosphere Reserve with purpose of establishing a new places for nesting – MOEWBioWetMan: A science based approach to understand biodiversity driven functions and services for improving wetland management – Austrian Science Organization
Main references
Ivanova, I., R. Nedkov, T. Michev, N. Kambourova. 2007. Study of the dynamics of the floating islands in the Sreburna biosphere reserve territory using aerospace, GPS and ground-based data. – Ecological engineering and environment protection, 3-4: 19-28. (In Bulgarian with English abstract).
Kalchev R., Vasilev V., Hiebaum G., Tsavkova V., Pehlivanov L. (2007) Recovery of the Srebarna Lake - experience and perspectives. Journal Balkan Ecology, 10, 117-130
Kovachev, S. et al., 1993. Hydrobiological investigations of the Reserve “Srebarna”. In: Waterengineering LTD. Sofia, Project “Reconstruction of the biosphere reseve “Sre¬barna”. Phase I., Sofia, october 1993, 45-47 (in Bulg.).
Kambourova, N. 2004. Breeding Ornithofauna of Srebarna Managed Reserve – Spatial Distribution and Long-Term Changes. Ph-D thesis, Central Laboratory of General Ecology – Bulgarian Academy of Sciences, Sofia, 275 pp.
Kambourova, N. 2005. The Current State of Colonial Waterbirds in Srebarna Managed Reserve. – Annuals of Sofia University “St. Kliment Ohridski”, Department of Biology, Book 4 – X Science Session, Sofia 2003, Part II, Tome 96: 313 – 320.
Kambourova, N., T. Michev. 2005. Biological Mapping of Small-sized Natural Territories. - Annuals of Sofia University “St. Kliment Ohridski”, Department of Biology, Book 4 – X Science Session, Sofia 2003, Part II, Tome 96: 463 – 469.
Kambourova, N. 2005. Habitat Distribution of Breeding Bird Species from Order Passeriformes in the Vicinity of Srebarna Managed Reserve. In: Chipev, N., V. Bogoev (managing editors). 2005. First National Scientific Conference of Ecology “Biodiversity, Ecosystems and Global Changes”, Sofia 4-5 November 2004, 193 – 202 (In Bulgarian).
Kambourova, N. (2005). The recent status of breeding bird communities of Srebarna Managed Reserve, North-East Bulgaria. – Acrocephalus 26 (125): 81 – 97.
Nikolov, S., Spasov, S., Kambourova, N. 2006. Density, number and habitat use of Common Buzzard, Buteo buteo wintering in the lowlands of Bulgaria. – Buteo 15: 39-47.
Kovachev, S., 1994. Content and goals of the programme for monitoring activities in the Srebarna Biosphere reserve. In: Proceedings ‘Sustainable use of the land and man¬agement of water resources in the watershed of the Srebarna Biosphere Reserve’, Silis¬tra, October 1994, Ministry of environment, 196-200 (in Bulg.).
Kovatchev, S. G. & Uzunov, Y. I. 1986. Formation of macroinvertebrate communities in the course of the biological selfpurification of the Mesta River. - Arch. Hydrobiol., 4: 427-526.
Michev T. and Stoyneva M. (eds). (2007) Inventory of Bulgarian wetlands and their biodiversity. Sofia: Publishing House Elsi-M, 364 p.,
Michev, T., M. Stoyneva, V. Velev, N. Michov, 1993. Complex ecological investigations of the Srebarna Biosphere Reserve in the conditions of contemporary anthropogenic im¬pact. Project of contract 220/1992 with Ministry of Education and Science of Bulgaria. Scientific report for the first phase of the project (november 1992 - october 1993), Sofia, 27 pp. (in Bulg.).
Naidenow, W., 1965. Contribution to the study of the copepod and branchiopod fauna of the water basins adjacent to the Danube. Izvestiya na Zoologicheskiya Institut s Muzey 19: 203-232 (in Bulg., Germ. summ.).
Pehlivanov, L., G. Atanasov, 2007. Silurus aristotelis (Pisces: Siluridae) a New Species in the Bulgarian Ichthyofauna. - Acta zool. bulg., 59 (2), 211-213.
Pehlivanov, L., V. Tzavkova, V. Vasilev. 2006. Development of the zooplankton community in the Srebarna Lake (North-Eastern Bulgaria) along the process of ecosystem rehabilitation. - In: Proceedings 36th International Conference of IAD. Austrian Committee DanubeResearch / IAD, Vienna. ISBN 13: 978-3-9500723-2-7, 280-284 p.
Pehlivanov, L., V. Vasilev, M. Vassilev. 2005. Changes of the ichthyofauna in the Srebarna Lake for the last 60 years – In: (Chipev et al., eds.) Proceedings of the First National Scientific Conference of Ecology (Sofia, November 4-5, 2004), Petexton, София: 265-270 (In Bulgarian with Engl. Abstract).
Pehlivanov, L., V. Tzavkova, W. Naidenov. 2004. The Metazoan plankton of the Biosphere Reserve Srebarna Lake (North-Eastern Bulgaria). Lauterbornia, 49: 99-105.
Sichanov D., V. Popov, V. Biserkov, S. Zidarova, N. Chipev. 2006. Spatial pattern and diversity of small mammal assemblages in the area of Srebarna Managed Nature Reserve (NE Bulgaria). Acta Zoologica Bulgarica 58, 209-222.
Sichanov, D., N. Chipev, V. Biserkov. 2004. Spatial distribution of terrestrial small mammals in the region of Srebarna reserve. Годишник на Софийския университет. Биологически факултет. Т. 96: 411-421.
Stoyneva, M. P., 1996. Long-term studies of the phytoplankton assemblages of the shallow Srebarna Lake (North-Eastern Bulgaria). Program and Abstracts "10th Workshop Inter¬national Association of Phytoplankton Taxonomy and Ecology", June 21-29, 1996, Gra¬nada (Spain), p. 52.
Vassilev, M., L. Pehlivanov, 2003. Structural Changes of Sturgeon Catches in the Bulgarian Danube Section. -Acta Zoologica Bulgarica, 55 (3): 97 - 102.
Vassilev, M., L. Pehlivanov. 2005. Checklist of the Bulgarian freshwater fishes. – Acta zool. Bulg., 57 (2): 161-190.
Vasilev V., V. Tzavkova, G. Hiebaum, R. Kalchev. Srebarna Lake plankton primary production and factors influencing its seasonal and annual variations. Acta Zoologica Bulgarica. (in press)
Velev, V., 1997. Changes of the dynamics of main phytocoenoses of the higher vegetation in the Srebarna Biosphere Reserve. In: Proceedings, International Symposium ‘Ekologiya 97’, Bourgas, pp. 224-226 (in Bulg.).
Velkov, B., L. Pehlivanov, M. Vassilev, 2004. Umbra krameri Walbaum (Pisces, Umbridae) – a reinstated species in the Bulgarian ichthyofauna. – Acta Zool. Bulg. 56 (2): 233-235.