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首页> 外文期刊>Estuarine coastal and shelf science >Shifts in coastal fish communities: Is eutrophication always beneficial for sticklebacks?
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Shifts in coastal fish communities: Is eutrophication always beneficial for sticklebacks?

机译:Shifts in coastal fish communities: Is eutrophication always beneficial for sticklebacks?

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摘要

Following declines. of predatory fish, mesopredators such as sticklebacks have been linked to shifts in coastal trophic networks through both top-down (preying on mesograzers and facilitating algal blooms) and bottom-up (benefitting from eutrophicated conditions) processes. Here, we tested whether the association between eutrophication effects (filamentous algae and turbidity) and sticklebacks held true in the Finnish Archipelago Sea where predatory fish populations have remained stable. If so, sticklebacks should be more abundant in the middle archipelago, where eutrophic conditions have led to increased turbidity, higher filamentous algal loads, and decreased cover of submerged aquatic vegetation (SAV), than in the outer archipelago, where environmental conditions are better. We measured the spatial and seasonal variation of sticklebacks (three-spined Gasterosteus aculeatus and nine-spined Pungitius pungitius) in middle and outer archipelago sites, as well as environmental variables potentially affecting their abundance.

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