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Estuarine-coastal gradient in food web network structure and properties

机译：食物网网络的河口-沿海梯度结构和性质

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摘要

Longitudinal changes in the structure and properties of food webs are known to occur in river systems from mountains to lowland areas. However, it is still unknown how food web structure and properties change along the estuarine-coastal gradient. Highly resolved estu-arine food webs were assembled for 30 sites in the Tagus estuary and adjacent coastal waters to investigate changes in food web structure and properties along 4 sections: upper estuary, middle estuary, channel and coast. This work confirmed the highly variable nature of estuarine systems, not only in terms of physicochemical and biological communities, but also in food web structure and network properties. The upper estuary stood out for having the highest variability for many food web properties. Overall, more significant differences were detected within this estuarine-coastal gradient than previously reported for river systems, and over a much smaller spatial scale.
机译：食物网的结构和性质的纵向变化已知发生在从山脉到低地地区的河流系统中。然而，仍然未知食物网的结构和性质如何沿河口-沿海梯度变化。在塔霍河口和邻近沿海水域的30个地点组装了高度分辨的河口-食物网，以调查河口，河口中部，河道和海岸4个部分的食物网结构和性质的变化。这项工作不仅在物理化学和生物群落方面，而且在食物网结构和网络特性方面都证实了河口系统的高度可变性。上河口因许多食物网特性的可变性最高而引人注目。总体而言，在此河口-沿海梯度范围内，与以前的河流系统相比，在较小的空间范围内，发现了更大的差异。

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