(Table 1) Characteristics of suspended particulate matter, its mass concentration, and total number of microorganisms in surface waters of the Severnaya Dvina River marginal filter in August 2005

During summer periods of 2003-2005, spatial and vertical distributions of suspended particulate matter and bacteria in stratified and homogeneous waters of the White Sea was studied. Results of the study of various quantitative characteristics of the suspended particulate matter (first of all, area of surface and volumetric and mass concentrations) and abundance of microorganisms in water are discussed. A direct correlation between the value of the surface area of the suspended particulate matter and the total number of bacteria in water is revealed. However, it was manifested only during the early summer period of observations and was not expressed at the end of summer. Enhanced surface area of the suspended particulate matter can indicate the higher biochemical activity of its particles. Influence of pelitic (<0.01 mm) size fraction on bacteria abundance in different parts of the sea during summer is estimated.2003至2005年夏季期间，对白海层化与均质水体中悬浮颗粒物（suspended particulate matter）及细菌的空间、垂直分布特征开展了研究。本文探讨了悬浮颗粒物的多项定量特征（主要为表面积、体积浓度与质量浓度）以及水体中微生物丰度的相关研究结果。研究揭示了悬浮颗粒物表面积与水体细菌总数之间存在直接相关性，但该相关性仅在观测初期的夏季时段显现，夏末阶段则无显著表现。悬浮颗粒物表面积的提升，可反映其颗粒具有更高的生化活性。此外，本研究还评估了夏季期间白海不同区域内泥质（<0.01 mm）粒级组分对细菌丰度的影响。