Abstract

New data on the contents of plant pigments and organic matter in bottom sediments of channel, floodplain and estuarine biotopes of the Gorky Reservoir (upstream Volga, Russia) are presented. Patterns of the distribution of sedimentary chlorophyll a and the products of its degradation, pheopigments, depending on the water current velocity, depth and type of the bottom sediments were revealed. Taking into account the zoning of the reservoir by abiotic factors, the trophic conditions in bottom sediments were estimated by the total content of chlorophyll a and pheopigments. Average concentration of sedimentary pigments, calculated considering the areas of bottom sediments of different types, in 2009–2010 (25.3 ± 1.5 μg/g dry sediments) is less than in the years of previous observations, 1996–1998 and 2001 (59.1 and 31.9 ± 3.7 μg/g, respectively). The trophic state of the reservoir’s benthal remains mesotrophic.

中文翻译：

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沉积颜料对高尔基水库底部生物群落营养状态的变异

摘要

提出了有关高尔基水库（俄罗斯伏尔加河上游）河道，洪泛区和河口生物群落底部沉积物中植物色素和有机物含量的新数据。根据水流速度，深度和底部沉积物的类型，揭示了沉积叶绿素a的分布模式及其降解产物，色素色素。考虑到非生物因素对储层的分区，通过叶绿素a的总含量估算了底部沉积物的营养状况。和色粉。考虑到不同类型底部沉积物的面积，2009-2010年的沉积颜料平均浓度（25.3±1.5μg/ g干沉积物）低于先前观测的1996-1998和2001年（59.1和31.9）分别为±3.7μg/ g）。水库底栖生物的营养状态仍然是中营养的。