Hristina Kalcheva

Personal information

Contacts

Dr. Hristina Vasileva Kalcheva
Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences (IBER-BAS)
1 Tsar Osvoboditel Blvd., 1000 Sofia, BULGARIA
Phones: +359 2 9885115 288; +359 889 013099
E-mail: hristinakalcheva@yahoo.com

Curriculum vitae

Date and place of birth: 1 July 1962, Sofia, Bulgaria

Education:
1982-1984 - Medical institute (now college), Medical University, Sofia
Specialist degree (now BSc) - nurse; again exams for a college education in 1995
1985-1987 - Faculty of Biology, Plovdiv University
1987-1990 - Faculty of Biology, Sofia University “St. Kliment Ohridski”
1990 - MSc in biology
Master thesis: Underground water mites from Vitosha Mountain and middle stretch of the Iskar River.
10.2005-03.2009 - PhD student, Institute of Zoology, BAS (now IBER-BAS)
2011 - PhD in hydrobiology, IBER-BAS
PhD thesis: Trophic significance of bacterioplankton in stagnant freshwater ecosystems - interactions with abiotic and biotic factors in the pelagial.

Employment:
1980-1982, 1984-1985 - dentist nurse, IV City hospital
1990-1995 - nurse, Medical Academy (1991-1993 - on maternity leave; 1 son)
1995-2005 (2006 - part time) - dentist nurse, Medical University, Faculty of Dental Medicine, Sofia
2009-2010 - biologist, Institute of Zoology, BAS
01.07.2010-2012 - assistant, IBER-BAS
2012 - present - chief assistant, IBER-BAS

Training Courses:
2006: English language (intermediate level); Training centre of BAS, Sofia; 1971-1979 - Language centre, Sofia.
2007: Statistical methods by using computer programs; Training centre of BAS.
2008:1.Molecular methods in microbiology; NCIPD, Sofia; 2.Trophic dynamics in ecosystems: feeding interactions, species identity and body size; ESF Research Networking Programme SIZEMIC, Clare College, University of Cambridge, UK.
2009: BIO-NET transnational training for researchers; FP7 KBBE, Sofia
2010: Identification and phenotyping of microorganisms and cell cultures with the system BIOLOG; Aquachim, Sofia.
2011: Geographic information systems (GIS) in protection and management of wetlands; IBER-BAS, Sofia.
2012: 1.Integrated management and dynamics of ecosystems of wetlands; IBER-BAS; 2. Fundamentals in understanding water quality; Faculty of Chemistry and Pharmacy, Sofia University.

Languages: English, Russian

Membership: International Association for Danube Research (IAD) - since 2012.
Union of Scientists in Bulgaria - since 2015.

Research interests

Aquatic microbial ecology, bacterioplankton, trophic interactions in freshwater ecosystems, hydrochemistry, molecular biology, statistical methods in biology, invasive alien species

Publications

2012-2019:

IF - Q2:
1. Kalchev, R., Beshkova M., Botev I., Kalcheva H., Kozuharov D., Trichkova T. Effect of Dreissena polymorpha (Bivalvia: Dreissenidae) on physicochemical characteristics of Zhrebchevo Reservoir (Central Bulgaria). Comptes Rendus de l Academie Bulgare des Sciences, 66, 11, BAS, 2013, ISSN:1310-1331, 1571-1578. ISI IF:0.198
2. Kalchev, R., Beshkova M., Kalcheva H. Methodological remarks about determination of phytoplankton chlorophyll-a and its usage. Comptes rendus de l’Académie bulgare des Sciences, in press (accepted 2018), ISSN:1310-1331, ISI IF 2018: 0.321.
3. Lyubenova, M., Kalcheva H., Chikalanov A. Investigation of relationships between ring width index and tree traits. Comptes rendus de l’Académie bulgare des Sciences, in press (accepted 2019), ISSN:1310-1331, ISI IF 2018: 0.321.

IF - Q3:
4. Tyufekchieva, V., Kalcheva H., Vidinova Y., Yaneva I., Stoyanova T., Ljubomirov T. Distribution and ecology of Taeniopterygidae (Insecta: Plecoptera) in Bulgaria. Acta zoologica bulgarica, 65, 1, 2013, ISSN:0324-0770, 89-100. ISI IF:0.357
5. Beshkova, M., Kalchev R., Kalcheva H. Phytoplankton in the Zhrebchevo reservoir before and after invasion of Dreissena polymorpha. Acta zoologica bulgarica, 66, 3, 2014, ISSN:0324-0770, 399-409. ISI IF:0.532
6. Kalchev, R., Dinka M., Beshkova M., Kalcheva H., Berczik A., Agoston-Szabo E. Factors influencing the chemical characteristics and nutrient retention/release potential of wetlands in the Middle (Hungarian) and Lower (Bulgarian) Danube River. Acta zoologica bulgarica, Suppl. 7, 2014, ISSN:0324-0770, 75-81. ISI IF:0.532
7. Kalchev, R, Beshkova M, Botev I., Kalcheva H., Kenderov L., Kozuharov D., Trichkova T. Relation of transparency, dissolved oxygen and pH to Dreissena spp. occurrence in Bulgarian standing waters. Acta zoologica bulgarica, 66, 3, 2014, ISSN:0324-0770, 389-397. ISI IF:0.532
8. Kalcheva, H., Kalchev R., Beshkova M.. Bacterioplankton of wetlands along the Lower Danube River (Bulgaria) and its relation to environmental factors. Acta zoologica bulgarica, Suppl. 7, 2014, ISSN:0324-0770, 83-89. ISI IF:0.532
9. Kenderov, L., Pavlova M., Trichkova T., Tyufekchieva V., Vidinova Y., Kozuharov D., Botev I., Hubenov Z., Uzunov Y., Stoichev S., Beshkova M., Kalcheva H., Kalchev R. Trophic state and trophic structure in three Bulgarian reservoirs. Acta zoologica bulgarica, 66, 2, 2014, ISSN:0324-0770, 247-254. ISI IF:0.532
10. Beshkova, M., Belkinova D., Kalchev R., Kalcheva H., Mladenov R., Stojanov P. Influence of Dreissena polymorpha (Pallas, 1771) (Mollusca: Bivalvia) on phytoplankton and physicochemical characteristics of Bulgarian reservoirs. Acta Zoologica Bulgarica, Suppl. 9, 2017, ISSN:0324-0770, 171-180. SJR:0.301, ISI IF:0.369
11. Kalcheva, H., Beshkova M., Kalchev R. Bacterioplankton and its relations to environmental factors and the presence of invasive mussels Dreissena spp. in three Bulgarian reservoirs. Acta Zoologica Bulgarica, Suppl. 9, 2017, ISSN:0324-0770, 161-170. ISI IF:0.369
12. Trichkova, T., Tomov R., Vladimirov V., Kalcheva H., Uludağ A. ESENIAS and DIAS Networks and Highlights of the 7th ESENIAS Workshop with Scientific Conference ‘Networking and Regional Cooperation towards Invasive Alien Species Prevention and Management in Europe’.. Acta zoologica bulgarica, Suppl. 9, 2017, ISSN:0324-0770, 5-19. ISI IF:0.369

IF - Q4:
13. Terziyski, D., Beshkova M., Kalchev R., Kalcheva H., Iliev I. Relationships of water column transparency, total phosphorus and chlorophyll-a in reservoirs with and without Dreissena spp. (Bivalvia: Mollusca). Acta zoologica bulgarica, 70, 3, 2018, ISSN:0324-0770, 389-395. ISI IF:0.278

SJR - Q3:
14. Terziyski D., Kalchev R., Kalcheva H., Alexandrov V. Investigation of relations between abiotic variables, their influence on the plankton primary productivity and the manuring effect in fish ponds. Bulgarian Journal of Agricultural Science, 22, 2016, ISSN:1310-0351, 485-491. SJR:0.229

SJR - Q4:
15. Terziyski D., Kalchev R., Kalcheva H., Alexandrov V. Study on the changes of biotic variables, their influence on the primary productivity and the effect of manuring of fish ponds. Ecologia Balkanica, 8, 2, 2016, ISSN:1313-9940, 1-11. SJR:0.123
16. Terziyski, D., Kalchev R., Kalcheva H., Alexandrov V. Relationships between plankton primary productivity, biotic and abiotic variables of carp fish ponds. Ecologia Balkanica, 8, 2, 2016, ISSN:1313-9940, 25-32. SJR:0.123

SJR (without Q):
17. Tzvetkova, P., Lyubenova M., Boteva S., Todorovska E., Tsonev S., Kalcheva H. Effect of herbicides paraquat and glyphosate on the early development of two tested plants. In: IOP Publishing of World Multidisciplinary Earth Sciences Symposium (WMESS 2018). IOP Conference Series: Earth and Environmental Science 221, 2019, 012137, ISSN:0000-2011, 1-17, SJR2018: 0.17.

International peer-reviewed journals without IF and SJR:
18. Kalchev R., Beshkova M., Kalcheva H. Trophic relationships and status of reservoirs with and without occurrence of Dreissena spp. (Mollusca: Bivalvia) built on Bulgarian Danube River tributaries. Transylvanian Review of Systematical and Ecological Research, 18, 1, 2016, ISSN:2344-3219, 13-22.
19. Kalchev R., Berczik Á., Beshkova M., Dinka M., Kalcheva H., Kiss A., Ágoston-Szabó E. Trophic status and phytoplankton limitation conditions in selected Bulgarian and Hungarian Danube River wetlands. Transylvanian Review of Systematical and Ecological Research, 18, 2, 2016, ISSN:2344-3219, 19-28.
20. Kalcheva H., Stoichev S., Beshkova M., Kalchev R., Stanachkova M., Kozuharov D., Trichkova T. The effect of Dreissena polymorpha on bacterioplankton, nematode fauna and their relations to environmental factors in Ogosta Reservoir (Danube Basin). Transylvanian Review of Systematical and Ecological Research, 18, 1, 2016, ISSN:2344-3219, DOI:10.1515/trser-2015-0077, 23-34.
21. Kalcheva H., Dinka M., Ágoston-Szabó E., Berczik Á., Kalchev R., Tarjányi N., Kiss A. Bacterioplankton from two Hungarian Danube River wetlands (Beda-Karapansca, Danube-Drava National Park) and its relations to environmental variables. Transylvanian Review of Systematical and Ecological Research, 18.1, 2016, ISSN:2344-3219, DOI:10.1515/trser-2015-0075, 1-12.
22. Terziyski, D., Kalcheva H., Ivanova A., Kalchev R. Investigation on some biotic factors in carp fish ponds. Agricultural Science and Technology, 8, 1, Trakia University, Stara Zagora, Bulgaria, 2016, ISSN:1313-8820, 62-69.
23. Peteva, S., Kalcheva H., Lyubenova M. Relationship between important deciduous traits in Bulgaria. Universal Journal of Geoscience, 5, 6, 2017, ISSN:2331-9593, 157-168.
24. Boteva, S., Lyubenova M., Kalcheva H. Growth test with Lepidium sativum L. for soil monitoring of sites, part of the Bulgarian National Soil Monitoring System. Bulgarian Journal of Soil Science, 4 (1), 2019, ISSN:2534-8787, 46-54.

Proceedings from conferences:
25. Kalchev, R., Beshkova M., Kalcheva H., Kazakov S., Nikolov V., Pavlova M., Pehlivanov L. Morphological, topographical and physicochemical characteristics of Bulgarian Danube River wetlands. Limnlological reports 39: Proc.39th IAD Conference Living Danube. 21-24 August 2012, Szentendre, Hungary, 71-79.
26. Kalchev, R., Beshkova M., Evtimova V., Fikova R., Kalcheva H., Tzavkova V., Vassilev V. Long-term trophic changes in Bulgarian–Romanian Danube River section and in adjacent wetland on Bulgarian territory during its restoration. SASA, Belgrade, 2018, ISBN:978-86-7025-779-5, 55-77.

Book chapters:
27. Naumova S., Kalcheva H. Bacterial communities. In: Uzunov Y., Georgiev B., Varadinova E., Ivanova N., Pehlivanov L., Vasilev V. (Eds.) Ecosystems of Biosphere Reserve Srebarna Lake, Prof. Marin Drinov Academic Publishing House, Sofia, 2012, ISBN:978-954-322-543-3, 25-38.
28. Vasilev, V., Kalchev R., Diadovski I., Kalcheva H., Ivanova I., Fikova R. Spatial and temporal morphometric changes. In: Uzunov Y., Georgiev B., Varadinova E., Ivanova N., Pehlivanov L., Vasilev V. (Eds.) Ecosystems of Biosphere Reserve Srebarna Lake, Prof. Marin Drinov Academic Publishing House, Sofia, 2012, ISBN:978-954-322-543-3, 185-196.

Books (editor):
29. Trichkova, T., Tomov R., Vladimirov V., Kalcheva H., Uludağ A. (Eds.) 2017. Acta Zoologica Bulgarica, Supplement 9, ESENIAS Scientific Reports 3. 7th ESENIAS Workshop with Scientific Conference ’Networking and Regional Cooperation Towards Invasive Alien Species Prevention and Management in Europe’, 28-30 March 2017, IBER- BAS, ESENIAS, Sofia, Bulgaria, 308 pp.
30. Trichkova, T., Tomov R., Vladimirov V., Kalcheva H., Vanev Y., Uludağ A., Tyufekchieva V. (Eds.) 2017. Book of Abstracts, 7th ESENIAS Workshop with Scientific Conference ’Networking and Regional Cooperation Towards Invasive Alien Species Prevention and Management in Europe’, 28-30 March 2017, IBER-BAS, ESENIAS, DIAS, Sofia, Bulgaria, 168 pp. ISBN 978-954-9746-42-6.
31. Trajanovski S., Trichkova T., Tomov R., Vladimirov V., Kalcheva H., Zdraveski K. (Eds.) 2019. Book of Abstracts, Joint ESENIAS and DIAS Scientific Conference and 9th ESENIAS Workshop ‘Species, ecosystems and areas of conservation concern under threat from the invasive alien species’, 03-06 September 2019, HIO, ESENIAS, DIAS, IBER-BAS, Ohrid, Republic of North Macedonia,160 pp. [ISSN (ISBN):1409-9373]

2007-2011:
32. Kalcheva, H. V. 2011. Trophic significance of bacterioplankton in stagnant freshwater ecosystems - interactions with abiotic and biotic factors in the pelagial. Summary of PhD thesis, IBER-BAS, Sofia, 38 pp. (In Bulgarian, abstract in English)
33. Kalcheva, H., Terziyski D., Kalchev R., Dochin K., Ivanova A. Control of zooplankton and nutrients on bacterioplankton in fish ponds with carp larvae. Bulgarian Journal of Agricultural Science 16 (3), 2010, 284-297. (IF 0.153)
34. Terziyski, D., Kalchev R., Dochin K., Piskov I., Kalcheva H., Pehlivanov L. Variability of biological characteristics and their relations to environmental variables in fish ponds stocked with carp fish larvae in two different proportions. Bulgarian Journal of Agricultural Science 16 (3), 2010, 332-340. (IF 0.153)
35. Beshkova, M., Kalcheva H., Kalchev R. Phytoplankton and bacterioplankton in three reservoirs (North-East Bulgaria) recommended as a potential reference sites according to the Water Framework Directive of EU. Acta zoologica bulgarica, Suppl. 2, 2008, 165-174.
36. Kalcheva, H., Nikolova L., Terziyski D., Stoeva A., Kalchev R. Relationships between bacterioplankton, zooplankton and environmental factors in fertilized and nonfertilized carp fish ponds. Acta zoologica bulgarica, Suppl. 2, 2008a, 175-184.
37. Kalcheva, H., Nikolova L., Terziyski D., Stoeva A., Kalchev R. Bacterioplankton dynamics and its relations to the productivity in carp fish ponds. Bulgarian Journal of Agricultural Science 14 (2), 2008b, 186-194.
38. Kalcheva, H., Beshkova M., Pehlivanov L., Kalchev R. 2008c. Bacterioplankton dynamics and the influence of environmental factors on it in the Srebarna Lake. In: Proceedings of the 3rd International Conference BALWOIS 2008, 27-31 May 2008, Ohrid, Republic of Macedonia. Abstract and full paper - FP119, 2008c, 9 pp.
39. Kalcheva, H., Terziyski D., Kalchev R. Comparison of bacterioplankton development between control and fertilized fish ponds. In: Galabov, A., Najdenski H. (Eds.), Proceedings of the Eleventh Congress of the Bulgarian Microbiologists with International Participation, October, 5-7, 2006, Varna, CD, Vol.1, 2007, pp. 170-174.

Published abstracts: 20, from a total of 27 presentations (9 oral and 18 posters) at 20 conferences (16 international). Some published abstracts from presentations (still not published in full text):
1. Kalcheva, H., Beshkova M., Terziyski D., Ivanova A., Dochin K., Pehlivanov L., Vasilev V., Tsavkova V., Botev I., Kalchev R. Trophic cascades in the pelagic food webs and abiotic changes as driving forces of bacterioplankton size structure in shallow anthropogenically manipulated and natural ecosystems and in reservoirs infested by Dreissena polymorpha in Bulgaria. 3rd International Workshop of the ESF Research Networking Programme SIZEMIC "Body-size in a changing world”, June 21-25, 2010, Institute of Marine Sciences (CSIC), Barcelona, Spain, Book Program and abstracts, 2010, p. 8.
2. Kalcheva, H., Terziyski D., Ivanova A., Kalchev R. Abiotic factors and trophic cascades in grazer and microbial food webs as driving forces of bacterioplankton structure in experimental fish ponds. MESOAQUA International Symposium “Recent achievements and future directions in Aquatic Mesocosm Research”, 16-19 October, 2012, Heraklion, Crete, Greece, Book of Abstracts, ID 209, 2012, p. 56.
3. Kiss, A., Kazakov S., Berczik A., Dinka M., Ágoston-Szabó E., Pehlivanov L., Kalcheva H., Kalchev R. Distribution of Eurytemora velox (Copepoda, Temoridae) in the Danube River and new data from Bulgaria and Hungary: Is it an invasive or non-invasive alien species in the Danube? 42 IAD Conference, 2-6 July 2018, Smolenice, Slovakia. Book of Abstracts, 2018, p. 32.
4. Kalcheva H., Kiss A., Dinka M., Berczik Á., Kalchev R., Ágoston-Szabó E. Crustacean zooplankton diversity and relations with bacterioplankton, chlorophyll-a, macrophytes and abiotic factors in two wetlands of the Middle Danube River, Hungary. Joint ESENIAS and DIAS Scientific Conference and 9th ESENIAS Workshop ‘Species, ecosystems and areas of conservation concern under threat from the invasive alien species’, 3-6 September 2019, Ohrid, Republic of North Macedonia. Book of Abstracts, p. 144.

Citations (2012-2019): 52 (25 in WoS and Scopus - 18 with IF, 7 with SJR).

Projects (2006-2019): 12.

Affiliation

Department

Aquatic Ecosystems

Division

Biodiversity and Processes in Freshwater Ecosystems

Research group

Lentic Ecosystems

History

Member for

10 years 14 weeks