Department of Biology, Faculty of Art and Science, Gaziantep University, 27310, Gaziantep, Turkey.
Department of Biology, Faculty of Art and Science, Osmaniye Korkut Ata University, 80000, Osmaniye, Turkey.
Environ Sci Pollut Res Int. 2023 Oct;30(46):102936-102946. doi: 10.1007/s11356-023-29471-z. Epub 2023 Sep 7.
Hydrological (rainy and dry) periods can affect the water quality of lentic ecosystems, which may be useful for understanding their ecological condition in the watershed. Ecological status of various lentic ecosytems (both brackish and freshwater) in the western Mediterranean basin was evaluated by using various diatom metrics throughout rainy (May) and dry (August and October) periods to explain the diatom-stressor interactions using multivariate approaches. Canonical correspondence analysis separated freshwater habitats under the pressures of nitrate and total organic carbon from brackish ecosystems under the pressures of conductivity, nitrite, sulphate, calcium, and copper, which were characterized by different phytoplankton species. Ecological integrations of diatom species varied in the ecosystems throughout rainy and dry periods. Different ecological regional diatom indices were used to find the best index/indices indicating the ecological status of lakes and reservoirs in the basin during the two hydrological periods. The trophic diatom index developed for lakes was not found to be suitable for assessing lentic habitats. European diatom indices generally showed the distinction in the assessment of these ecosystems in the rainy and dry seasons, but others could not. Among the diatom indices, only the trophic index Turkey (TIT) showed a statistically significant correlation with TP. The TIT not only showed degradation of the water quality of ecosystems during the dry season compared to the rainy season, but it has also been successful in distinguishing the ecological conditions of lentic ecosystems.
水文（雨期和旱期）时期会影响静水生态系统的水质，这对于了解流域内生态系统的状况可能很有用。通过在雨期（5 月）和旱期（8 月和 10 月）使用各种硅藻指标，评估了西地中海盆地各种淡水和微咸水（咸水和淡水）静水生态系统的生态状况，利用多元方法解释硅藻胁迫相互作用。典范对应分析将硝酸盐和总有机碳压力下的淡水生境与电导率、亚硝酸盐、硫酸盐、钙和铜压力下的微咸水生态系统区分开来，这些生态系统具有不同的浮游植物物种。在雨期和旱期，硅藻物种的生态整合在各生态系统中有所不同。在这两个水文时期，使用不同的生态区域硅藻指数来找到指示盆地湖泊和水库生态状况的最佳指数/指数。为湖泊开发的营养硅藻指数被发现不适合评估静水生境。欧洲硅藻指数通常在评估这两个季节的这些生态系统时表现出明显的区别，但其他指数则不然。在硅藻指数中，只有土耳其营养指数（TIT）与 TP 呈统计学显著相关。TIT 不仅表明旱季生态系统的水质比雨季恶化，而且还成功地区分了静水生态系统的生态条件。
