A community-based bioassay for the salinity stress on periphytic protozoan fauna in marine ecosystems

IF 2.1 3区地球科学 Q2 OCEANOGRAPHY

Continental Shelf Research Pub Date : 2024-02-01 DOI:10.1016/j.csr.2024.105177

Awais Ali , Xiaoxiao Zhong , Qiaoling Wang , Henglong Xu

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引用次数: 0

Abstract

To evaluate the salinity stress on ecological quality using protozoa, a 1-month baseline study was conducted along a gradient of salinity 9, 19, 29, 39, and 49 PSU (practical salinity unit). Protozoan samples were collected from an intertidal zone of the Yellow Sea, northern China. The findings demonstrated that (1) protozoan species represented different tolerance to scales of salinity stress; (2) the species richness decreased with increase of salinity, while in individual abundances sharply dropped with both increase and decrease of salinity compared to the control (29 PSU); (3) the probit regression revealed the median inhibition concentrations (IC₅₀) values 21.14 and 38.24 PSU for low (<29 PSU) and high (>29 PSU) situations, respectively; and (4) high salinity stress significantly shifted the community pattern of the protozoan fauna. Therefore, it is suggested that periphytic protozoan communities may be used a useful bioindicator of ecological quality under salinity stress in marine ecosystems.

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基于群落的生物测定法：海洋生态系统中盐胁迫对附生原生动物群的影响

为了利用原生动物评估盐度对生态质量的压力，我们沿着盐度梯度 9、19、29、39 和 49 PSU（实用盐度单位）进行了为期 1 个月的基线研究。样本采集自中国北部黄海潮间带。研究结果表明：(1)原生动物物种对不同盐度胁迫的耐受性不同；(2)与对照组（29 PSU）相比，物种丰富度随盐度的升高而降低，个体丰度随盐度的升高和降低而急剧下降；(3)probit 回归结果显示，盐度对原生动物的中位抑制浓度（IC50）分别为 21.14 和 38.24 PSU。(4) 高盐度胁迫显著改变了原生动物群落模式。因此，附生原生动物群落可作为海洋生态系统盐度胁迫下生态质量的有效生物指标。

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来源期刊

Continental Shelf Research 地学-海洋学

CiteScore

4.30

自引率

4.30%

发文量

136

审稿时长

6.1 months

期刊介绍： Continental Shelf Research publishes articles dealing with the biological, chemical, geological and physical oceanography of the shallow marine environment, from coastal and estuarine waters out to the shelf break. The continental shelf is a critical environment within the land-ocean continuum, and many processes, functions and problems in the continental shelf are driven by terrestrial inputs transported through the rivers and estuaries to the coastal and continental shelf areas. Manuscripts that deal with these topics must make a clear link to the continental shelf. Examples of research areas include: Physical sedimentology and geomorphology Geochemistry of the coastal ocean (inorganic and organic) Marine environment and anthropogenic effects Interaction of physical dynamics with natural and manmade shoreline features Benthic, phytoplankton and zooplankton ecology Coastal water and sediment quality, and ecosystem health Benthic-pelagic coupling (physical and biogeochemical) Interactions between physical dynamics (waves, currents, mixing, etc.) and biogeochemical cycles Estuarine, coastal and shelf sea modelling and process studies.