General Directorate of Water Management, T.R. Ministry of Agriculture and Forestry, Ankara, Turkey.
Faculty of Arts and Sciences, Department of Biology, Dumlupınar University, Kütahya, Turkey.
Environ Sci Pollut Res Int. 2021 Aug;28(32):43567-43578. doi: 10.1007/s11356-021-13282-1. Epub 2021 Apr 9.
The Kızılırmak River is the longest river (1.355 km) in Turkey and flows into the Black Sea. Main pressures in the basin are waste water discharges, widespread agriculture, livestock activities, and excessive salinity due to the natural formation. In this study, the performance of the most widely used European diatom indices (IPS, IDG, IBD, EPI-D, TDI, and TI) was tested statistically by comparing them with the indicators of organic pollution (biological oxygen demand and ammonium-nitrogen), eutrophication (orthophosphate and nitrate-nitrogen) and salinization (electrical conductivity) in the Kızılırmak basin, Turkey. For this purpose, a total of 97 diatom samples from 33 rivers were collected seasonally in 2014 and 215 species were identified. Principal component analysis was performed to evaluate the "general degradation" in the basin, and linear regression was used to calculate the correlations with diatom indices. As a result, EPI-D, IPS, IBD, and TI were strongly correlated indices, respectively, while IDG and TDI had the lowest correlations with general degradation. Only the EPI-D index was significantly correlated with all environmental variables. Our results showed that the EPI-D index can be used for the ecological status assessment in terms of phytobenthos in the Kızılırmak basin in line with the Water Framework Directive.
基齐尔达雷马克河是土耳其最长的河流（全长 1355 千米），流入黑海。该流域的主要压力来自废水排放、广泛的农业、畜牧业活动以及自然形成的高含盐量。在这项研究中，通过将最广泛使用的欧洲硅藻指数（IPS、IDG、IBD、EPI-D、TDI 和 TI）与有机污染（生物需氧量和氨氮）、富营养化（正磷酸盐和硝酸盐氮）和盐度（电导率）的指标进行比较，对它们的性能进行了统计检验。为此，于 2014 年对土耳其基齐尔达雷马克河流域的 33 条河流进行了季节性采样，共采集了 97 个硅藻样本，鉴定出 215 个物种。进行了主成分分析以评估流域的“总体退化”情况，并进行了线性回归以计算与硅藻指数的相关性。结果表明，EPI-D、IPS、IBD 和 TI 分别是相关性较强的指数，而 IDG 和 TDI 与总体退化的相关性最低。只有 EPI-D 指数与所有环境变量均显著相关。研究结果表明，EPI-D 指数可用于基齐尔达雷马克河流域的水生植物生态状况评估，符合《水框架指令》的要求。
