Trophic and saprobic diatom-based indices are not indicating the same ecological status in a shallow lake, Türkiye

IF 1.2 4区环境科学与生态学 Q4 ECOLOGY

Community Ecology Pub Date : 2024-06-04 DOI:10.1007/s42974-024-00199-1

Nurhayat Dalkıran, Burcu Zünbülgil-Ünsal

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Abstract

This study aimed to assess the ecological health of a RAMSAR site lake by leveraging diatoms as ecological indicators. Utilizing six trophic and four saprobic indices, we evaluate the lake's ecological status. Monthly samples were collected from five sites between June 2014 and May 2015. Our findings revealed that the lake exhibited hypereutrophic characteristics according to TN and TP concentrations, as well as trophic state indices, except TIDL. Notably, the TI_VD index showed a significant correlation with TN and TP, while SI_Sla correlated significantly with TN. Despite the substantial organic matter load, our analysis positioned the lake at a beta mesosaprobic level with moderate ecological status across three saprobic indices. Interestingly, the annual average dissolved oxygen (DO) concentration classified the lake water as Class I in terms of water quality. The moderate saprobic index values suggest efficient organic matter oxidation, potentially influenced by high DO concentrations in the lake littoral. Our study underscores the importance of integrating trophic and saprobic indices to comprehensively evaluate ecosystem health and ecological status in shallow eutrophic lakes, offering insights into nutrient enrichment and organic pollution load, respectively.

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图尔基耶一个浅水湖泊中的营养和无生物硅藻指数并不显示相同的生态状况

本研究旨在利用硅藻作为生态指标，评估一个拉姆萨尔遗址湖泊的生态健康状况。我们利用六种营养和四种无机指数来评估湖泊的生态状况。我们在 2014 年 6 月至 2015 年 5 月期间从五个地点采集了月度样本。我们的研究结果表明，根据 TN 和 TP 浓度以及营养状态指数（TIDL 除外），该湖呈现出高富营养化特征。值得注意的是，TIVD 指数与 TN 和 TP 呈显著相关，而 SISla 与 TN 呈显著相关。尽管存在大量有机物负荷，但我们的分析仍将该湖泊定位在β中亚热带水平，在三个无机物指数方面处于中等生态状态。有趣的是，年平均溶解氧（DO）浓度将湖水水质划分为一级。适度的无机物指数值表明，湖泊沿岸的高溶解氧浓度可能影响了有机物的高效氧化。我们的研究强调了综合营养盐指数和无机盐指数对全面评估浅层富营养化湖泊生态系统健康和生态状况的重要性，并分别提供了对营养盐富集和有机污染负荷的见解。

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来源期刊

Community Ecology 环境科学-生态学

CiteScore

2.90

自引率

5.90%

发文量

审稿时长

>36 weeks

期刊介绍： Community Ecology, established by the merger of two ecological periodicals, Coenoses and Abstracta Botanica was launched in an effort to create a common global forum for community ecologists dealing with plant, animal and/or microbial communities from terrestrial, marine or freshwater systems. Main subject areas: (i) community-based ecological theory; (ii) modelling of ecological communities; (iii) community-based ecophysiology; (iv) temporal dynamics, including succession; (v) trophic interactions, including food webs and competition; (vi) spatial pattern analysis, including scaling issues; (vii) community patterns of species richness and diversity; (viii) sampling ecological communities; (ix) data analysis methods.