"Общая численность бактериопланктона и содержание метана в водной толще Чукотского моря за период исследований по программе RUSALCA" "The total number of bacterioplankton and the methane content in the water column of the Chukchi Sea during the RUSALCA research program" Savvichev Alexander St. Petersburg

The total number of bacterioplankton is most a general characteristic of an abundance of microorganisms in water column of the seas and oceans 2004 The Number of Bacteria in the Surface of Water Column Chukchi Sea varied from 70 x 10 3 cell per ml (in Herald canyon) to 280 x 10 3 cell per ml (near Chukotka Peninsula). Average 170 x 10 3 cell per ml.

2009 The Number of Bacteria in the Water Column of Bering Strait varied from 550 x 10 3 cell per ml (near Chukotka) to 1500 x 10 3 cell per ml (near Alaska); of Chukchi Sea – from 88 x 10 3 cell per ml (north) to 380 x 10 3 cell per ml (Herald Canyon); in East Siberian Sea from 76 x 10 3 to 160 x 10 3 (Longa Strait) Average 210 x 10 3 cell per ml

2012 The Number of Bacteria in the Surface of Water Column of Chukchi Sea varied from x 10 3 cell per ml (North of Herald Canyon and Chukchi Sea) to 490 x 10 3 cell per ml (near Chukotka); average 240 x 10 3 cell per ml The water area of the Chukchi Sea in terms of Bacteria Number is clearly divided into two parts: the northern and southern. The Number of bacterioplankton in these parts differ by 3 times. Итак, средние показатели Общей численности бактериопланктона в конце лета за три года исследований варьировали от 170 до 240 тысяч клеток. Thus, the average total number of bacterioplankton in late summer for a three-year study ranged from 170 to 240,000 cells

The maximum production of bacteria is found out in Bering strait near to coast of Alaska, and in a southern part of Chukchi Sea. Production of bacteria in East Siberian Sea twice more low, than in Chukchi Sea. Chukchi and East Siberian Sea 0.10 – 0.75 (Average 0.38)

The value of production of bacterioplankton in 2012 was clearly different in the northern and southern part of the Chukchi Sea. In 2004 and 2009 this pattern was not so clear. North 0.10 – 0.67 South 0.90 – 4.4 (µg C l -1 day -1 )

Production of bacterioplankton in Chukchi Sea in times more low, than in White Sea, Barents Sea and Kara Sea

RUSALCA – 44.6 (Average 14.5)

In the surface water of the Chukchi Sea, the contents of methane varied from 5.1 to 15.3 nM average 9.2). In the surface water of the East Siberian Sea, the contents of methane varied from 5.08 to nM, average 8.1 nM ).

In the near- bottom water of the Chukchi Sea, the contents of methane varied from 5.1 to 66.3 nM average 21.3).

In the surface water of the Chukchi Sea (2012), the contents of methane was varied from 2.0 to 12.9 nM (average 5.6). During the three years of research it was the lowest average content of methane in surface water

In the near-bottom water of the Chukchi Sea, the contents of methane varied from 6.7 to 26.5 nM (average 15.5). The methane content in the bottom water layer for the three years of research compared to the surface methane content was more stable

The values of methane in surface sediments of Chukchi and East Siberian Sea vary from (from 234 nM to 603 nM СН 4 /dm 3 )