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Dive into the research topics where Ivan Botev is active.

Publication


Featured researches published by Ivan Botev.


Journal of Natural History | 2008

Characteristics of zebra mussel (Dreissena polymorpha) populations in infested reservoirs, northwest Bulgaria

Teodora Trichkova; D. Kozuharov; Zdravko Hubenov; Ivan Botev; Mladen Zivkov; Svetoslav D. Cheshmedjiev

The zebra mussel populations in the Reservoirs Ogosta and Rabisha (northwest Bulgaria, Danube River basin) were studied with respect to distribution, shell morphometry, abundance and biomass. In the reservoirs, the zebra mussels occurred at depths between 3.5 and 10.0 m and only on hard and mixed substratum. Based on principal component analysis, the majority of total variance of morphometric data was explained by the shell size and only a small proportion by the shell shape of the zebra mussels. In the Rabisha Reservoir, shell plasticity in respect to site location was observed. The absolute abundance and total biomass of zebra mussels differed among the sites within both reservoirs. The mean values in the Rabisha population were much higher than in the Ogosta population. The relations of shell morphometry, abundance and biomass of zebra mussels to the physicochemical conditions in the reservoirs were discussed.


Freshwater Biology | 2009

Ecological thresholds in European alpine lakes

Jordi Catalan; M. Grazia Barbieri; Frederic Bartumeus; Peter Bitušík; Ivan Botev; Anton Brancelj; Dan Cogălniceanu; Marina Manca; Aldo Marchetto; Nadja Ognjanova-Rumenova; Sergi Pla; Maria Rieradevall; Sanna Sorvari; Elena Štefková; Evžen Stuchlík; Marc Ventura


Freshwater Biology | 2009

Regionalisation of chemical variability in European mountain lakes

Lluís Camarero; Michela Rogora; Rosario Mosello; Nicholas J. Anderson; Alberto Barbieri; Ivan Botev; Martin Kernan; Jiří Kopáček; Atte Korhola; André F. Lotter; Gregor Muri; Carmen Postolache; Evžen Stuchlík; Hansjörg Thies; Richard F. Wright


Freshwater Biology | 2009

Trace elements in alpine and arctic lake sediments as a record of diffuse atmospheric contamination across Europe.

Lluís Camarero; Ivan Botev; G. Muri; Roland Psenner; Neil L. Rose; Evzen Stuchlik


Aquatic Sciences | 2005

Acidification in European mountain lake districts: a regional assessment of critical load exceedance.

Cj Curtis; Ivan Botev; Lluís Camarero; Jordi Catalan; Dan Cogalniceanu; M. Hughes; Martin Kernan; Jiří Kopáček; Atte Korhola; Roland Psenner; Michela Rogora; Evžen Stuchlík; Mauro Veronesi; Richard F. Wright


Journal of Limnology | 2004

Ecological relations and temporal changes in the pelagial of the high mountain lakes in the Rila Mountains (Bulgaria)

Roumen Kalchev; Ivan Botev; Milena Hristozova; Wesselin Naidenow; Galerida Raikova-Petrova; Maya P. Stoyneva; Dobrina Temniskova-Topalova; Teodora Trichkova


Fundamental and Applied Limnology, Advances in Limnology , 62 pp. 153-166. (2009) | 2009

Benthic diatom flora in relation to chemical and physical factors in high mountain lakes in the Rila Mountains (Southwestern Bulgaria).

Nadja Ognjanova-Rumenova; Ivan Botev; M Kernan


Water Science and Technology | 1999

Long-term eutrophication development in five coastal lakes of the Bulgarian black sea region

Roumen Kalchev; Ivan Botev


River Systems | 2008

Long-term and seasonal changes of nutrients, seston and phytoplankton concentrations in the Lower Danube (Bulgarian-Romanian stretch)

Roumen Kalchev; Doina Ionica; Michaela Beshkova; Ivan Botev; Cristina Sandu


Phytologia Balcanica: International Journal of Balkan Flora and Vegetation | 2011

Using sediment diatom assemblages in the assessment of environmental changes in high-altitude lakes, Rila Mts, Bulgaria

Nadja Ognjanova-Rumenova; Ivan Botev; Yanka N. Vidinova

Collaboration


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Roumen Kalchev

Bulgarian Academy of Sciences

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Teodora Trichkova

Bulgarian Academy of Sciences

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Michaela Beshkova

Bulgarian Academy of Sciences

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Lluís Camarero

Spanish National Research Council

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Evžen Stuchlík

Charles University in Prague

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Mladen Zivkov

Bulgarian Academy of Sciences

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Yanka N. Vidinova

Bulgarian Academy of Sciences

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Zdravko Hubenov

Bulgarian Academy of Sciences

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