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首页> 外文期刊>Estuarine Coastal and Shelf Science >Trophic network model of exposed sandy coast: Linking continental and marine water ecosystems
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Trophic network model of exposed sandy coast: Linking continental and marine water ecosystems

机译：裸露的沙质海岸的营养网络模型：连接大陆和海洋水生态系统

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摘要

A macroscopic food web network for the exposed sandy coastal zone of the south-eastern Baltic Sea was reconstructed using ECOPATH software to assess the matter and energy balance in the ecosystem. The model incorporated 40 living functional groups representing the Baltic Sea coastal system of Lithuania during the first decade of 21rst century. The overall pedigree index of our model was relatively high (0.66) as much of the input data originated from the study area. The results indicate net heterotrophy of the coastal zone due to strong influences from the nearby river lagoon system (Curonian Lagoon). The majority of fish species and waterbirds were present in the coastal system on a seasonal basis and their migrations contributed to heterotrophic conditions. Among fish, the freshwater stragglers possibly contribute to the reversal of flow in biomass and energy from the coastal zone to the river-lagoon system. Top predators such as breeding and wintering piscivorous waterbirds and large pike-perch were identified as keystone species. There was a clear negative balance for the biomass of small marine pelagic fishes such as smelt, sprat and Baltic herring which represent the main prey items in this system. (C) 2017 Elsevier Ltd. All rights reserved.
机译：使用ECOPATH软件重建了波罗的海东南沿海裸露的沙质海岸带的宏观食物网网络，以评估生态系统中的物质和能量平衡。该模型包含了代表21世纪前十年的立陶宛波罗的海沿岸系统的40个有生命的功能组。我们模型的整体谱系指数相对较高（0.66），因为许多输入数据都来自研究区域。结果表明，由于附近河流泻湖系统（库鲁尼亚泻湖）的强烈影响，沿海地区出现净异养。大多数鱼类和水鸟是季节性存在于沿海系统中的，它们的迁移造成了异养状况。在鱼类中，淡水流浪者可能有助于逆转从沿海地区到河流泻湖系统的生物质和能量流。顶级捕食者，例如繁殖和越冬的食鱼水鸟和大型梭鲈被确定为主要物种。小型海洋中上层鱼类（如熔炼，鲱鱼和波罗的海鲱）的生物量存在明显的负平衡，它们是该系统中的主要猎物。 （C）2017 Elsevier Ltd.保留所有权利。

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