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首页> 外文期刊>Estuarine Coastal and Shelf Science >Response of Acartia populations to environmental variability and effects of invasive congenerics in the estuary of Bilbao, Bay of Biscay
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Response of Acartia populations to environmental variability and effects of invasive congenerics in the estuary of Bilbao, Bay of Biscay

机译：比斯开湾毕尔巴鄂河口的A虫种群对环境变异的响应和侵入性同系物的影响

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摘要

The effect of environmental factors (river discharge, water temperature and dissolved oxygen saturation) on the abundance and distribution of Acartia populations and the interactions between their congenerics was evaluated by means of transfer function (TF) models in the estuary of Bilbao during the period 1998-2005. The recorded species were Acartia clausi, Acartia tonsa, Acartia margalefi and Acartia discaudata. Acartia clausi dominated in the entire euhaline region of this estuary until 2003 when it was displaced from the inner part by A. tonsa. This invasive species {A. tonsa) was found for the first time in 2001 and colonized successfully the inner (salinity 30) and intermediate (salinity 33) waters of this estuary since 2003. The TF models revealed an immediate and negative effect of A. tonsa on A. clausi in the intermediate salinity (33) waters, where these species showed the highest spatial overlap. The results indicate that environmental changes from 2003 influenced the abundance of Acartia species, being unfavourable for A. clausi. The decrease of A. clausi abundance in low salinity waters was related to a significant decrease of dissolved oxygen saturation levels, whereas the increase of temperature was linked to a significant increase of A tonsa. Acartia margalefi and A. discaudata were scarce over the entire period, but they were found to be valuable indicators of hydrological changes, which were associated to climate factors. These two latter species increased in abundance and expanded their seasonal distribution, and in the case of A. margalefi also its spatial distribution, in 2002, coinciding with the period in the time-series when autumn-winter rainfall and summer temperatures were lowest, and dissolved oxygen saturation levels were highest.
机译：通过1998年毕尔巴鄂河口的传递函数（TF）模型，评估了环境因素（河流排放，水温和溶解氧饱和度）对A虫种群的数量和分布及其同类之间的相互作用的影响。 -2005。所记录的物种是青car螨，通car螨，玛格A螨和盘尾disc。直到2003年，car鱼在整个河口的euhaline地区占主导地位，直到2003年被A.tonsa从内部移走。 {A.于2001年首次被发现，并自2003年以来成功定居了该河口的内水（盐度30）和中水（盐度33）。TF模型揭示了A.tonsa对A. clausi的直接和负面影响。在中等盐度（33）水域中，这些物种的空间重叠率最高。结果表明，自2003年以来的环境变化影响了A菜物种的丰富度，不利于青曲霉。低盐度水域青藻的丰度降低与溶解氧饱和度的显着降低有关，而温度的升高与A tonsa的显着增加有关。在整个时期内，玛卡塔氏菌和盘状拟杆菌都很稀少，但被发现是水文变化的重要指标，而水文变化与气候因素有关。后两个物种的丰度增加并扩展了其季节性分布，在A. margalefi的情况下，其空间分布也在2002年，与秋冬季降雨和夏季温度最低的时间序列相一致，并且溶解氧饱和度最高。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2009年第4期|621-628|共8页
  • 作者

    Guillermo Aravena; Fernando Villate; Ibon Uriarte; Arantza Iriarte; Berta Ibanez;

  • 作者单位

    Laboratory of Ecology, Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, PO Box 644, 48080 Bilbao, Spain;

    Laboratory of Ecology, Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, PO Box 644, 48080 Bilbao, Spain;

    Laboratory of Ecology, Department of Plant Biology and Ecology, Faculty of Pharmacy, University of the Basque Country, Paseo de la Universidad 7, 01006 Gasteiz, Spain;

    Laboratory of Ecology, Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country, PO Box 644, 48080 Bilbao, Spain;

    Basque Foundation for Health Innovacion and Research (BIOEF), 48015 Sondika, Bizkaia, Spain CIBER Epidemiology and Public Health (CIBERESP), Spain;

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  • 正文语种 eng
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  • 关键词

    Acartia species; environmental variability; estuaries; invasive species; transfer function models;

    机译：螨属;环境变化;河口入侵物种;传递函数模型;

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