2 research outputs found
The State and Dynamics of Biological Communities in the Rybinsk Reservoir under Climate Changes
ΠΠ° ΠΎΡΠ½ΠΎΠ²Π΅ Π°Π½Π°Π»ΠΈΠ·Π° ΠΌΠ½ΠΎΠ³ΠΎΠ»Π΅ΡΠ½ΠΈΡ
Π΄Π°Π½Π½ΡΡ
ΠΏΠΎ ΡΡΡΡΠΊΡΡΡΠ½ΡΠΌ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠ°ΠΌ ΡΠΈΡΠΎ- (1954β2014 Π³Π³.) ΠΈ Π·ΠΎΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° (2004β2013 Π³Π³.), Π° ΡΠ°ΠΊΠΆΠ΅ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ Ρ
Π»ΠΎΡΠΎΡΠΈΠ»Π»Π° Π² Π²ΠΎΠ΄Π΅ ΠΈ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΡΡ
(2009β2014 Π³Π³.) Π ΡΠ±ΠΈΠ½ΡΠΊΠΎΠ³ΠΎ Π²ΠΎΠ΄ΠΎΡ
ΡΠ°Π½ΠΈΠ»ΠΈΡΠ° (ΠΠ΅ΡΡ
Π½ΡΡ ΠΠΎΠ»Π³Π°, Π ΠΎΡΡΠΈΡ) ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠ΅ ΠΊΠ»ΠΈΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΏΡΠΈΠ²ΠΎΠ΄ΡΡ ΠΊ ΡΡΠ°Π½ΡΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ ΠΈ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΎΠΎΠ±ΡΠ΅ΡΡΠ² Π²ΠΎΠ΄ΠΎΡ
ΡΠ°Π½ΠΈΠ»ΠΈΡΠ°, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠ½ΠΎΠΉ ΠΏΡΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠΈ ΡΡΠΎΡΠΈΠΈ ΠΏΡΠ΅ΡΠ½ΠΎΠ²ΠΎΠ΄Π½ΡΡ
ΡΠΊΠΎΡΠΈΡΡΠ΅ΠΌ. ΠΠΎΡΠ»Π΅ Π°Π½ΠΎΠΌΠ°Π»ΡΠ½ΠΎ ΠΆΠ°ΡΠΊΠΎΠ³ΠΎ Π»Π΅ΡΠ° 2010 Π³. Π²ΡΡΠ²Π»Π΅Π½ ΡΠ΅Π·ΠΊΠΈΠΉ ΠΏΠΎΠ΄ΡΠ΅ΠΌ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Ρ
Π»ΠΎΡΠΎΡΠΈΠ»Π»Π° Π² Π²ΠΎΠ΄Π΅ Ρ ΠΏΡΠ΅ΠΎΠ±Π»Π°Π΄Π°Π½ΠΈΠ΅ΠΌ Π²Π΅Π»ΠΈΡΠΈΠ½, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠ½ΡΡ
Π΄Π»Ρ ΡΠ²ΡΡΠΎΡΠ½ΡΡ
ΠΈ Π²ΡΡΠΎΠΊΠΎΡΠ²ΡΡΠΎΡΠ½ΡΡ
Π²ΠΎΠ΄. Π Π°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΡΠ°ΡΡΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΏΠΈΠ³ΠΌΠ΅Π½ΡΠΎΠ² Π² Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΡΡ
Π² ΡΠ°Π·Π½ΡΠ΅ Π³ΠΎΠ΄Ρ Π±ΡΠ»ΠΎ ΡΡ
ΠΎΠ΄Π½ΡΠΌ ΠΈ ΠΎΡΡΠ°ΠΆΠ°Π»ΠΎ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠ½ΡΡ Π΄Π»Ρ Π²ΠΎΠ΄ΠΎΡ
ΡΠ°Π½ΠΈΠ»ΠΈΡΠ° ΡΠΏΠ΅ΡΠΈΡΠΈΠΊΡ ΡΡΡΡΠΊΡΡΡΡ Π³ΡΡΠ½ΡΠΎΠ²ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ°. Π ΡΠ΅Π·ΠΎΠ½Π½ΠΎΠΉ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ΅ Π±ΠΈΠΎΠΌΠ°ΡΡΡ ΡΠΈΡΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° ΠΈ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Ρ
Π»ΠΎΡΠΎΡΠΈΠ»Π»Π° Π»Π΅ΡΠ½ΠΈΠΉ ΠΌΠ°ΠΊΡΠΈΠΌΡΠΌ, ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π½ΡΠΉ ΡΠ°Π·Π²ΠΈΡΠΈΠ΅ΠΌ ΡΠΈΠ°Π½ΠΎΠ±Π°ΠΊΡΠ΅ΡΠΈΠΉ, ΡΡΠ°Π» Π΄ΠΎΠΌΠΈΠ½ΠΈΡΠΎΠ²Π°ΡΡ Π½Π°Π΄ Π²Π΅ΡΠ΅Π½Π½ΠΈΠΌ. Π ΡΡΡΡΠΊΡΡΡΠ΅ ΡΠΈΡΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° ΡΠ²Π΅Π»ΠΈΡΠΈΠ»ΠΈΡΡ ΠΏΡΠΎΠΏΠΎΡΡΠΈΠΈ ΡΠΈΠ°Π½ΠΎΠ±Π°ΠΊΡΠ΅ΡΠΈΠΉ ΠΈ ΠΌΠΈΠΊΡΠΎΡΡΠΎΡΠ½ΡΡ
ΡΠΈΡΠΎΡΠ»Π°Π³Π΅Π»Π»ΡΡ, ΠΎΡΠΌΠ΅ΡΠ΅Π½Ρ ΠΈΠ½Π²Π°Π·ΠΈΠΈ ΡΠΎΠ»ΠΎΠ½ΠΎΠ²Π°ΡΠΎ-Π²ΠΎΠ΄Π½ΡΡ
Π΄ΠΈΠ°ΡΠΎΠΌΠΎΠ²ΡΡ
ΠΈ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠ΅ ΡΠ°Π·ΠΌΠ΅ΡΠΎΠ² ΠΊΠ»Π΅ΡΠΎΠΊ. Π ΡΠ΅Π·ΠΎΠ½Π½ΠΎΠΉ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ΅ Π±ΠΈΠΎΠΌΠ°ΡΡΡ Π·ΠΎΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π»ΡΡ Π²ΡΠΎΡΠΎΠΉ ΠΏΠΎΠ·Π΄Π½Π΅Π»Π΅ΡΠ½ΠΈΠΉ (Π°Π²Π³ΡΡΡ) ΠΏΠΈΠΊ, ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎ ΠΏΡΠΎΡΠ²ΠΈΠ²ΡΠΈΠΉΡΡ Π² Π°Π½ΠΎΠΌΠ°Π»ΡΠ½ΠΎ ΠΆΠ°ΡΠΊΠΎΠ΅ Π»Π΅ΡΠΎ 2010 Π³. ΠΡΠΎΠΌΠ΅ ΡΠΎΠ³ΠΎ, Π½Π°Π±Π»ΡΠ΄Π°Π»ΠΎΡΡ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΠ΅ Π½Π° ΠΎΠ΄Π½ΡβΠ΄Π²Π΅ Π½Π΅Π΄Π΅Π»ΠΈ ΡΡΠΎΠΊΠΎΠ² Π½Π°ΡΠ°Π»Π° ΠΈ ΠΎΠΊΠΎΠ½ΡΠ°Π½ΠΈΡ ΡΠ΅Π·ΠΎΠ½Π½ΠΎΠ³ΠΎ ΡΠΈΠΊΠ»Π° ΡΡΠ΄Π° Π²ΠΈΠ΄ΠΎΠ² Π·ΠΎΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎ 1960β1970-Ρ
Π³Π³. ΠΠΎΡΠ²Π»Π΅Π½ΠΈΠ΅ Π»Π΅ΡΠ½Π΅Π³ΠΎ Π΄Π΅ΡΠΈΡΠΈΡΠ° ΡΠ°ΡΡΠ²ΠΎΡΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΊΠΈΡΠ»ΠΎΡΠΎΠ΄Π° (Π2 1β4 ΠΌΠ³/Π» Π² ΡΠ»ΠΎΠ΅ 1β7 ΠΌ Π½Π°Π΄ Π΄Π½ΠΎΠΌ) ΠΏΡΠΈΠ²Π΅Π»ΠΎ ΠΊ Π»ΠΎΠΊΠ°Π»ΡΠ½ΠΎΠΌΡ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π²Π΅ΡΡΠΈΠΊΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΡΠ°ΠΊΠΎΠΎΠ±ΡΠ°Π·Π½ΡΡ
-ΡΠΈΠ»ΡΡΡΠ°ΡΠΎΡΠΎΠ² ΠΈ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΡ ΠΈΡ
ΠΎΠ±ΠΈΠ»ΠΈΡ Π΄ΠΎ ΡΡΠ΅Ρ
ΡΠ°Π·The long-term data on structural characteristics of phytoplankton (1954β2014) and zooplankton (2004β2013), as well as chlorophyll content in the water and bottom sediments (2009β2014) in the Rybinsk Reservoir (Upper Volga, Russia) were analyzed. It was shown that the modern climate changes lead to transformation in the state and dynamics of biological communities that is characteristic of the trophicity increase. After the abnormally hot summer of 2010 a sharp rise in chlorophyll content in water with a predominance of values typical for eutrophic and highly eutrophic conditions was detected. Distribution of plant pigments in the bottom sediments was similar in different years, which shows the specific character of the sediment complex structure in the reservoir. In the seasonal dynamics of phytoplankton biomass and chlorophyll concentration the summer maximum caused by development of cyanobacteria began to dominate above the spring one. In the structure of phytoplankton the proportions of cyanobacteria and myxotrophic phytophagellates increased, the invasion of brackish-water diatoms was marked, and diminution of the cell size was noted. In seasonal dynamics of zooplankton biomass the second late peak was formed in August and it was particularly pronounced in the abnormally hot summer of 2010. In addition, there was a 1β2 week shift in timing of the beginning and ending in seasonal cycle of a number of zooplankton species relative to the 1960β1970s. Appearance of a summer dissolved oxygen deficiency (up to 1β4 mg O2/L in the layer of 1β7 m above the bottom) resulted in a local change in the vertical distribution of crustacean filtrators and decrease in their abundance up to three time
The State and Dynamics of Biological Communities in the Rybinsk Reservoir under Climate Changes
ΠΠ° ΠΎΡΠ½ΠΎΠ²Π΅ Π°Π½Π°Π»ΠΈΠ·Π° ΠΌΠ½ΠΎΠ³ΠΎΠ»Π΅ΡΠ½ΠΈΡ
Π΄Π°Π½Π½ΡΡ
ΠΏΠΎ ΡΡΡΡΠΊΡΡΡΠ½ΡΠΌ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠ°ΠΌ ΡΠΈΡΠΎ- (1954β2014 Π³Π³.) ΠΈ Π·ΠΎΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° (2004β2013 Π³Π³.), Π° ΡΠ°ΠΊΠΆΠ΅ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΡ Ρ
Π»ΠΎΡΠΎΡΠΈΠ»Π»Π° Π² Π²ΠΎΠ΄Π΅ ΠΈ Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΡΡ
(2009β2014 Π³Π³.) Π ΡΠ±ΠΈΠ½ΡΠΊΠΎΠ³ΠΎ Π²ΠΎΠ΄ΠΎΡ
ΡΠ°Π½ΠΈΠ»ΠΈΡΠ° (ΠΠ΅ΡΡ
Π½ΡΡ ΠΠΎΠ»Π³Π°, Π ΠΎΡΡΠΈΡ) ΠΏΠΎΠΊΠ°Π·Π°Π½ΠΎ, ΡΡΠΎ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΠ΅ ΠΊΠ»ΠΈΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΏΡΠΈΠ²ΠΎΠ΄ΡΡ ΠΊ ΡΡΠ°Π½ΡΡΠΎΡΠΌΠ°ΡΠΈΠΈ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ ΠΈ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ Π±ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠΎΠΎΠ±ΡΠ΅ΡΡΠ² Π²ΠΎΠ΄ΠΎΡ
ΡΠ°Π½ΠΈΠ»ΠΈΡΠ°, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠ½ΠΎΠΉ ΠΏΡΠΈ ΡΠ²Π΅Π»ΠΈΡΠ΅Π½ΠΈΠΈ ΡΡΠΎΡΠΈΠΈ ΠΏΡΠ΅ΡΠ½ΠΎΠ²ΠΎΠ΄Π½ΡΡ
ΡΠΊΠΎΡΠΈΡΡΠ΅ΠΌ. ΠΠΎΡΠ»Π΅ Π°Π½ΠΎΠΌΠ°Π»ΡΠ½ΠΎ ΠΆΠ°ΡΠΊΠΎΠ³ΠΎ Π»Π΅ΡΠ° 2010 Π³. Π²ΡΡΠ²Π»Π΅Π½ ΡΠ΅Π·ΠΊΠΈΠΉ ΠΏΠΎΠ΄ΡΠ΅ΠΌ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Ρ
Π»ΠΎΡΠΎΡΠΈΠ»Π»Π° Π² Π²ΠΎΠ΄Π΅ Ρ ΠΏΡΠ΅ΠΎΠ±Π»Π°Π΄Π°Π½ΠΈΠ΅ΠΌ Π²Π΅Π»ΠΈΡΠΈΠ½, Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠ½ΡΡ
Π΄Π»Ρ ΡΠ²ΡΡΠΎΡΠ½ΡΡ
ΠΈ Π²ΡΡΠΎΠΊΠΎΡΠ²ΡΡΠΎΡΠ½ΡΡ
Π²ΠΎΠ΄. Π Π°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΡΠ°ΡΡΠΈΡΠ΅Π»ΡΠ½ΡΡ
ΠΏΠΈΠ³ΠΌΠ΅Π½ΡΠΎΠ² Π² Π΄ΠΎΠ½Π½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΡΡ
Π² ΡΠ°Π·Π½ΡΠ΅ Π³ΠΎΠ΄Ρ Π±ΡΠ»ΠΎ ΡΡ
ΠΎΠ΄Π½ΡΠΌ ΠΈ ΠΎΡΡΠ°ΠΆΠ°Π»ΠΎ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠ½ΡΡ Π΄Π»Ρ Π²ΠΎΠ΄ΠΎΡ
ΡΠ°Π½ΠΈΠ»ΠΈΡΠ° ΡΠΏΠ΅ΡΠΈΡΠΈΠΊΡ ΡΡΡΡΠΊΡΡΡΡ Π³ΡΡΠ½ΡΠΎΠ²ΠΎΠ³ΠΎ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ°. Π ΡΠ΅Π·ΠΎΠ½Π½ΠΎΠΉ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ΅ Π±ΠΈΠΎΠΌΠ°ΡΡΡ ΡΠΈΡΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° ΠΈ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Ρ
Π»ΠΎΡΠΎΡΠΈΠ»Π»Π° Π»Π΅ΡΠ½ΠΈΠΉ ΠΌΠ°ΠΊΡΠΈΠΌΡΠΌ, ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π½ΡΠΉ ΡΠ°Π·Π²ΠΈΡΠΈΠ΅ΠΌ ΡΠΈΠ°Π½ΠΎΠ±Π°ΠΊΡΠ΅ΡΠΈΠΉ, ΡΡΠ°Π» Π΄ΠΎΠΌΠΈΠ½ΠΈΡΠΎΠ²Π°ΡΡ Π½Π°Π΄ Π²Π΅ΡΠ΅Π½Π½ΠΈΠΌ. Π ΡΡΡΡΠΊΡΡΡΠ΅ ΡΠΈΡΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° ΡΠ²Π΅Π»ΠΈΡΠΈΠ»ΠΈΡΡ ΠΏΡΠΎΠΏΠΎΡΡΠΈΠΈ ΡΠΈΠ°Π½ΠΎΠ±Π°ΠΊΡΠ΅ΡΠΈΠΉ ΠΈ ΠΌΠΈΠΊΡΠΎΡΡΠΎΡΠ½ΡΡ
ΡΠΈΡΠΎΡΠ»Π°Π³Π΅Π»Π»ΡΡ, ΠΎΡΠΌΠ΅ΡΠ΅Π½Ρ ΠΈΠ½Π²Π°Π·ΠΈΠΈ ΡΠΎΠ»ΠΎΠ½ΠΎΠ²Π°ΡΠΎ-Π²ΠΎΠ΄Π½ΡΡ
Π΄ΠΈΠ°ΡΠΎΠΌΠΎΠ²ΡΡ
ΠΈ ΡΠΌΠ΅Π½ΡΡΠ΅Π½ΠΈΠ΅ ΡΠ°Π·ΠΌΠ΅ΡΠΎΠ² ΠΊΠ»Π΅ΡΠΎΠΊ. Π ΡΠ΅Π·ΠΎΠ½Π½ΠΎΠΉ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ΅ Π±ΠΈΠΎΠΌΠ°ΡΡΡ Π·ΠΎΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° ΡΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π»ΡΡ Π²ΡΠΎΡΠΎΠΉ ΠΏΠΎΠ·Π΄Π½Π΅Π»Π΅ΡΠ½ΠΈΠΉ (Π°Π²Π³ΡΡΡ) ΠΏΠΈΠΊ, ΠΌΠ°ΠΊΡΠΈΠΌΠ°Π»ΡΠ½ΠΎ ΠΏΡΠΎΡΠ²ΠΈΠ²ΡΠΈΠΉΡΡ Π² Π°Π½ΠΎΠΌΠ°Π»ΡΠ½ΠΎ ΠΆΠ°ΡΠΊΠΎΠ΅ Π»Π΅ΡΠΎ 2010 Π³. ΠΡΠΎΠΌΠ΅ ΡΠΎΠ³ΠΎ, Π½Π°Π±Π»ΡΠ΄Π°Π»ΠΎΡΡ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΠ΅ Π½Π° ΠΎΠ΄Π½ΡβΠ΄Π²Π΅ Π½Π΅Π΄Π΅Π»ΠΈ ΡΡΠΎΠΊΠΎΠ² Π½Π°ΡΠ°Π»Π° ΠΈ ΠΎΠΊΠΎΠ½ΡΠ°Π½ΠΈΡ ΡΠ΅Π·ΠΎΠ½Π½ΠΎΠ³ΠΎ ΡΠΈΠΊΠ»Π° ΡΡΠ΄Π° Π²ΠΈΠ΄ΠΎΠ² Π·ΠΎΠΎΠΏΠ»Π°Π½ΠΊΡΠΎΠ½Π° ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎ 1960β1970-Ρ
Π³Π³. ΠΠΎΡΠ²Π»Π΅Π½ΠΈΠ΅ Π»Π΅ΡΠ½Π΅Π³ΠΎ Π΄Π΅ΡΠΈΡΠΈΡΠ° ΡΠ°ΡΡΠ²ΠΎΡΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΊΠΈΡΠ»ΠΎΡΠΎΠ΄Π° (Π2 1β4 ΠΌΠ³/Π» Π² ΡΠ»ΠΎΠ΅ 1β7 ΠΌ Π½Π°Π΄ Π΄Π½ΠΎΠΌ) ΠΏΡΠΈΠ²Π΅Π»ΠΎ ΠΊ Π»ΠΎΠΊΠ°Π»ΡΠ½ΠΎΠΌΡ ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΡ Π²Π΅ΡΡΠΈΠΊΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΡΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΡΠ°ΠΊΠΎΠΎΠ±ΡΠ°Π·Π½ΡΡ
-ΡΠΈΠ»ΡΡΡΠ°ΡΠΎΡΠΎΠ² ΠΈ ΡΠ½ΠΈΠΆΠ΅Π½ΠΈΡ ΠΈΡ
ΠΎΠ±ΠΈΠ»ΠΈΡ Π΄ΠΎ ΡΡΠ΅Ρ
ΡΠ°Π·The long-term data on structural characteristics of phytoplankton (1954β2014) and zooplankton (2004β2013), as well as chlorophyll content in the water and bottom sediments (2009β2014) in the Rybinsk Reservoir (Upper Volga, Russia) were analyzed. It was shown that the modern climate changes lead to transformation in the state and dynamics of biological communities that is characteristic of the trophicity increase. After the abnormally hot summer of 2010 a sharp rise in chlorophyll content in water with a predominance of values typical for eutrophic and highly eutrophic conditions was detected. Distribution of plant pigments in the bottom sediments was similar in different years, which shows the specific character of the sediment complex structure in the reservoir. In the seasonal dynamics of phytoplankton biomass and chlorophyll concentration the summer maximum caused by development of cyanobacteria began to dominate above the spring one. In the structure of phytoplankton the proportions of cyanobacteria and myxotrophic phytophagellates increased, the invasion of brackish-water diatoms was marked, and diminution of the cell size was noted. In seasonal dynamics of zooplankton biomass the second late peak was formed in August and it was particularly pronounced in the abnormally hot summer of 2010. In addition, there was a 1β2 week shift in timing of the beginning and ending in seasonal cycle of a number of zooplankton species relative to the 1960β1970s. Appearance of a summer dissolved oxygen deficiency (up to 1β4 mg O2/L in the layer of 1β7 m above the bottom) resulted in a local change in the vertical distribution of crustacean filtrators and decrease in their abundance up to three time