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首页> 外文期刊>Diatom Research >Diatom adaptability to environmental change: a case study of two Cocconeis species from high-salinity areas
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Diatom adaptability to environmental change: a case study of two Cocconeis species from high-salinity areas

机译：硅藻对环境变化的适应性：以高盐度地区的两种球​​藻为例

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This paper investigates the impact of natural change in salinity on the morphological plasticity of diatom frustules. In particular, this study uses as an example the highly saline lagoons of the Coorong wetlands in South Australia. These wetlands have been strongly impacted by the drought in South Australia (2004-2010) which has resulted in a salinity gradient of 40 to 134 psu along the wetlands. In this framework, the impact of some environmental variables (i.e., dissolved oxygen, pH, turbidity, salinity, temperature and nutrients) was investigated on the nanoscale features characterizing the cell wall of two diatom species, Cocconeis placentula Ehrenberg and C. pinnata Gregory. The results suggest that not only salinity, but also nutrient concentration play a signicant role in the morphological plasticity of the frustule of these two diatom species. It is proposed that the morphological plasticity of the diatom frustules is species-specic and related to their immediate surrounding environmental conditions.
机译：本文研究了盐度的自然变化对硅藻壳的形态可塑性的影响。特别是，本研究以南澳大利亚库隆湿地的高盐度泻湖为例。这些湿地受到南澳大利亚州（2004-2010年）干旱的严重影响，造成沿湿地的盐度梯度为40至134 psu。在此框架下，研究了一些环境变量（即溶解氧，pH，浊度，盐度，温度和营养素）对表征两个硅藻物种（胎盘球藻Ehrenberg和C.pinnata Gregory）的细胞壁的纳米尺度特征的影响。结果表明，不仅盐度，而且营养物浓度在这两个硅藻物种的壳的形态可塑性中都起着重要作用。提出硅藻壳的形态可塑性是特定于物种的，并且与它们的周围环境条件有关。

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