Abstract

This study analyzes the data of spectrophotometric determination of plant pigments in the bottom sediments of Lake Nero based on bottom survey data of 2017. A low variability (C_v = 27–31%) in concentrations of chlorophyll a and pheopigments over the bottom area and vertically in the sapropel cores is established. The values of pigment concentrations in bottom sediments of the lake belong to the hypertrophic category. The hypertrophic state of the lake with respect to the pigment content (>300 μg/g of dry sediment) is maintained for the period of formation of an 80-cm sapropel layer (~800 years). Trends towards an increase in concentrations of plant pigments from the lower to upper layers of cores are revealed upon a significant relationship with concentrations of organic matter and total nitrogen, which indicates the natural eutrophication of the lake.

中文翻译：

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基于沉积颜料的浅层尼罗河自然富营养化特征

摘要

本研究基于2017年的底部调查数据，分析了尼罗湖底部沉积物中的植物色素，通过分光光度法测定的数据。叶绿素a浓度的低变异性（C _v = 27–31％）并且在腐殖质岩心的底部区域和垂直方向上形成色铁。湖底沉积物中色素的浓度值属于肥大类。相对于色素含量（> 300μg/ g干燥沉积物）而言，湖泊的肥大状态在形成80厘米腐殖质层的过程中（约800年）得以维持。从植物核的下层到上层，植物色素的浓度增加的趋势与有机物和总氮的浓度存在显着关系，这表明了湖泊的自然富营养化。