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Comparative analysis of phytoplankton patterns in two modified lakes with contrasting hydrological features

机译：具有水文特征对比的两个改良湖泊浮游植物格局比较分析

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摘要

Hydrological management represents one of the main factors controlling physical and chemical characteristics as well as biodiversity and productivity of planktonic communities in artificial and modified lakes. In Alpine piedmont reservoirs, which often receive large water inputs from high altitude watersheds, control operated by hydrological regime over ecological processes is also mediated by other related variables such as water temperature and turbulence, and load of inorganic suspended solids. This contribution reports on results obtained from a comparative study on the impact of hydrological regime on phytoplankton patterns in two modified piedmont lakes of different size and hydrology located in the NE Italian Alps: Lake Santa Croce (V = 147 × 10~6 km~3) and Lake Toblino (V = 5.7 × 10~6 km~3). Phytoplankton of both lakes was characterised by a pronounced dominance of diatoms, accompanied by cryptophytes and green algae. The mesotrophic Lake Santa Croce showed a typical seasonal succession of dominant groups, while phytoplankton growth in the eutrophic Lake Toblino was variable and showed pronounced pulses in relation to dramatic changes in the hydrological regime. The comparative study of phytoplankton, based on morpho-functional classification and application of multivariate analyses (non-metric multidimensional scaling, principal components analysis, and redundancy analysis), showed that hydrological regime affected phytoplankton growth in the two lakes both directly, i.e. through renewal time, and indirectly, i.e.rnregulating thermal conditions in Lake Santa Croce and nutrient availability in both lakes. Nevertheless, effectiveness of hydrological constraints largely depended on lake size and morphology, being more pronounced in the shallower and smaller Lake Toblino.
机译：水文管理是控制物理和化学特性以及人工湖和改良湖中浮游生物群落生物多样性和生产力的主要因素之一。在经常从高海拔流域接收大量水输入的阿尔卑斯山麓水库中，水文状况对生态过程的控制还受到其他相关变量（例如水温和湍流以及无机悬浮固体负荷）的调节。该贡献报告的结果是通过对意大利东北部两个不同大小和水文特征的改良山麓湖泊中的水文状况对浮游植物格局的影响进行比较研究得出的结果：圣克鲁斯湖（V = 147×10〜6 km〜3 ）和托布利诺湖（V = 5.7×10〜6 km〜3）。两个湖泊的浮游植物都以硅藻显着优势为特征，并伴有隐藻和绿藻。中营养型的圣克鲁斯湖显示出典型的优势种群季节性变化，而富营养型的托布利诺湖中的浮游植物生长却是可变的，并且与水文状况的急剧变化有关，显示出明显的脉动。根据形态功能分类和多元分析（非度量多维标度，主成分分析和冗余分析）的应用对浮游植物进行的比较研究表明，水文状况直接影响了两个湖泊中浮游植物的生长，即通过更新同时间接地调节圣十字湖的热状况和两个湖泊的养分利用率。然而，水文约束的有效性在很大程度上取决于湖泊的大小和形态，在浅而小的托布利诺湖中更为明显。

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  • 来源
    《Permafrost and periglacial processes》 |2010年第2期|213-226|共14页
  • 作者

    Monica Tolotti; Adriano Boscaini; Nico Salmaso;

  • 作者单位

    IASMA Research and Innovation Centre, Fondazione E. Mach-Istituto Agrario di S. Michele all'Adige, Environment and Natural Resources Area, Via E. Mach, 1, I-38010 S. Michele a/Adige, Trento, Italy;

    IASMA Research and Innovation Centre, Fondazione E. Mach-Istituto Agrario di S. Michele all'Adige, Environment and Natural Resources Area, Via E. Mach, 1, I-38010 S. Michele a/Adige, Trento, Italy;

    IASMA Research and Innovation Centre, Fondazione E. Mach-Istituto Agrario di S. Michele all'Adige, Environment and Natural Resources Area, Via E. Mach, 1, I-38010 S. Michele a/Adige, Trento, Italy;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    modified lakes; hydrology; phytoplankton ecology; morpho-functional classification; multivariate analyses;

    机译：修改后的湖泊;水文学浮游植物生态学形态功能分类;多元分析;

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