Bacterioplankton in the Western Kara Sea

IF 1.3 4区地球科学 Q4 OCEANOGRAPHY Oceanology Pub Date : 2024-05-14 DOI:10.1134/s0001437024020103

N. D. Romanova, M. A. Boltenkova, E. M. Bezzubova

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Abstract—

This paper reports data on the structural and production characteristics of bacterioplankton in the western Kara Sea at the beginning and middle of summer. On the slope of the St. Anna Trough, the average prokaryote abundance in the water column was 594–708 × 10³ cells mL⁻¹ (26.4–36.5 mgC m^–3) in June and 247–517 × 10³ cells mL⁻¹ (12–28 mgC m^–3) at the beginning of August. On the transect along the Novaya Zemlya archipelago, the average bacterioplankton abundance in the water column was 186–554 × 10³ cells mL⁻¹ (8.5–30 mgC m^–3) within a week after the seasonal ice retreat and 169–443 × 10³ cells mL⁻¹ (8–21 mgC m^–3) in midsummer. The specific bacterial growth rate did not exceed 1.28 day^–1; high values were observed in the upper warm water layer, above the halocline, and also in near-bottom water. At the beginning of summer, the bacterioplankton production tended to decrease in the northeast direction. The prokaryote abundance distribution was associated with water temperature and oxygen saturation possibly as an indirect indicator of the past phytoplankton bloom.

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西喀拉海的浮游细菌

摘要--本文报告了初夏和盛夏喀拉海西部浮游细菌的结构和生产特征数据。在圣安娜海槽斜坡上，6 月份水体中原核生物的平均丰度为 594-708 × 103 cells mL-1 （26.4-36.5 mgC m-3），8 月初为 247-517 × 103 cells mL-1 （12-28 mgC m-3）。在沿新谢姆利亚群岛的横断面上，季节性冰退后一周内水体中浮游细菌的平均数量为 186-554 × 103 cells mL-1 （8.5-30 mgC m-3），盛夏时为 169-443 × 103 cells mL-1 （8-21 mgC m-3）。细菌的比生长率不超过 1.28 天-1；在上层暖水层、卤跃层以上以及近底层水域观察到的细菌比生长率较高。初夏时节，浮游细菌产量呈向东北方向减少的趋势。原核生物的丰度分布与水温和氧饱和度有关，可能是过去浮游植物大量繁殖的间接指标。

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来源期刊

Oceanology 地学-海洋学

CiteScore

2.00

自引率

20.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Oceanology, founded in 1961, is the leading journal in all areas of the marine sciences. It publishes original papers in all fields of theoretical and experimental research in physical, chemical, biological, geological, and technical oceanology. The journal also offers reviews and information about conferences, symposia, cruises, and other events of interest to the oceanographic community.