Abstract

According to the saprobity index, estimated by the phytoplankton biomass, the degree of organic pollution of ecotone areas (the mouth of the Il’d River and the littoral of the Volga reach of the Rybinsk Reservoir) has been determined. The saprobity index in protected shallow waters was 1.83 in 2009 and 2.07 in 2010; in the pelagial, it was 2.14 and 2.13 in 2009 and 2010, respectively. In the river–reservoir system, the lowest average values of the saprobity index were noted in the mouth area of the Il’d River: in 2009 it was 1.94, in 2010 1.87, and in 2011 1.88. In the river and the reservoir, its values were higher: 2.05 and 2.07 in 2009, 1.96 and 2.08 in 2010, and 1.97 and 1.99 in 2011, respectively. The decrease in saprobity in shallow waters and at the mouth of the river, compared to the bordering water, indicates a higher intensity of self-purification processes, which can ensure the sustainability of the ecosystem of the reservoir as a whole. Abnormal weather phenomena, in particular, high summer water temperatures, can lead to the destabilization of the features of ecotone algocenoses and, as a result, to a violation in the process of self-purification of the reservoir.

中文翻译：

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生态交错区过程导致水域对营养生长的抵抗力（根据浮游植物指标）

摘要

根据浮游植物生物量估算的腐化指数，确定了生态交错带地区（伊尔德河河口和雷宾斯克水库伏尔加河沿岸）的有机污染程度。 2009年和2010年，受保护的浅水区的腐败指数分别为1.83和2.07；在远洋，2009年和2010年分别为2.14和2.13。在河流-水库系统中，Il'd河口地区的腐化度指数平均值最低：2009年为1.94，2010年为1.87，2011年为1.88。在河流和水库中，其值较高：2009年分别为2.05和2.07，2010年为1.96和2.08，2011年为1.97和1.99。与周边水体相比，浅水区和河口的盐度降低，表明自净过程强度更高，可以保证整个水库生态系统的可持续性。异常天气现象，特别是夏季高水温，可能导致交错带藻生特征不稳定，从而破坏水库的自净过程。