R. Kalchev

发表

BACTERIOPLANKTON DYNAMICS AND ITS RELATIONS TO THE PRODUCTIVITY IN CARP FISH PONDS

D. Terziyski, Hristina V. Kalcheva, L. Nikolova, 2008 .

Bacterioplankton Dynamics and the Influence of Environmental Factors on it in the Srebarna Lake

Hristina V. Kalcheva, R. Kalchev, M. Beshkova, 2008 .

Small-scale distribution, accuracy determination and comparability of abundance and diversity of phytoplankton in two Bulgarian reservoirs

R. Kalchev, Veselka Tsavkova, Sonya Stoyanova, 2005 .

The Effect of Dreissena polymorpha on Bacterioplankton, Nematode Fauna and their Relations to Environmental Factors in Ogosta Reservoir (Danube Basin)

D. Kozuharov, T. Trichkova, Hristina V. Kalcheva, 2016 .

Bacterioplankton of Wetlands along the Lower Danube River ( Bulgaria ) and Its Relation to Environmental Factors

Hristina V. Kalcheva, R. Kalchev, M. Beshkova, 2014 .

Analysis of Ecosystem Services of Wetlands along the Bulgarian Section of the Danube River

M. Pavlova, Svetla Doncheva, R. Kalchev, 2014 .

Trophic state and trophic structure in three Bulgarian reservoirs

M. Pavlova, D. Kozuharov, I. Botev, 2014 .

Trophic Relationships and Status of Reservoirs with and without Occurrence of Dreissena ssp. (Mollusca, Bivalvia) Built on Bulgarian Danube River Tributaries

Hristina V. Kalcheva, R. Kalchev, M. Beshkova, 2016 .

Variability of biological characteristics and their relations to environmental variables in fish ponds stocked with carp fish larvae in two different proportions.

D. Terziyski, Hristina V. Kalcheva, R. Kalchev, 2010 .

Fish abundance differences and relations to plankton primary production in two variants of pond stocking with common carp ( Cyprinus carpio L . ) , grass carp ( Ctenopharyngodon idella Val

I. Iliev, D. Terziyski, R. Kalchev, 2009 .

Effect of organic fertilizer on plankton primary productivity in fish ponds

G. Grozev, D. Terziyski, A. Stoeva, 2007, Aquaculture International.

VARIABILITY OF CHEMICAL CHARACTERISTICS AND THEIR RELATIONS TO ENVIRONMENTAL AND BIOLOGICAL VARIABLES IN TWO VARIANTS OF PONDS STOCKING WITH FISH LARVAE

A. Ivanova, D. Terziyski, R. Kalchev, 2010 .

Fish abundance differences and relations to primary production in two variants of pond stocking with common carp(Cyprinus carpio L.), grass carp (Ctenopharyngodon idella Val.) and bighead carp (Aristichthys nobilis Rich.) larvae

I. Iliev, D. Terziyski, R. Kalchev, 2009 .

Relationships Between Plankton Primary Productivity , Biotic and Abiotic Variables of Carp Fish Ponds

D. Terziyski, Hristina V. Kalcheva, R. Kalchev, 2016 .

The 40 th Anniversary Conference of the International Association for Danube Research ( IAD ) The Danube and Black Sea Region – Unique Environment and Human Well-Being Under Conditions of Global Changes : Scientific Topics , Contributions and Results

T. Trichkova, R. Kalchev, 2014 .

Relationships Between Bacterioplankton, Zooplankton and Environmental Factors in Fertilized and Non-fertilized Carp Fishponds

R. Kalchev, L. Pehlivanov, 2008 .

Relationships between macrophyte species, their life forms and environmental factors in floodplain water bodies from the Bulgarian Danube River Basin

R. Kalchev, M. Beshkova, V. Valchev, 2020 .

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

I. Botev, T. Trichkova, R. Kalchev, 2004 .

INVESTIGATION OF RELATIONS BETWEEN ABIOTIC VARIABLES, THEIR INFLUENCE ON THE PLANKTON PRIMARY PRODUCTIVITY AND THE MANURING EFFECT IN FISH PONDS

D. Terziyski, Hristina V. Kalcheva, R. Kalchev, 2017 .

Some allometric and non-allometric relationships between chlorophyll-a and abundance variables of phytoplankton

R. Kalchev, M. Beshkova, R. Tsvetkova, 1996, Hydrobiologia.

Bacterioplankton from Two Hungarian Danube River Wetlands (Beda-Karapancsa, Danube-Drava National Park) and its Relations to Environmental Variables

M. Dinka, E. Ágoston-Szabó, A. Kiss, 2016 .

CONTROL OF ZOOPLANKTON AND NUTRIENTS ON BACTERIOPLANKTON IN FISH PONDS WITH CARP LARVAE

A. Ivanova, D. Terziyski, Hristina V. Kalcheva, 2010 .

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

R. Kalchev, Ivan Botev, 1999 .