Riparian forest may represent a key subsidy to aquatic food webs. While most research has been done in running waters, the origin of resources subsidising biomass and the role of riparian coverage in food webs remains largely unstudied in reservoirs. This research evaluated the role of forest riparian zones as food web subsidies in a recently formed reservoir of Ijuí River, Brazil. The diet of fish and the origin of carbon and nitrogen fuelling fish biomass was compared between littoral habitats with riparian forests and of open canopy. Sampling for stable isotopes of fish and basal resources and the application of bayesian mixing models showed that most of the fish production originates from terrestrial carbon in this recently formed reservoir. Moreover, an increasing terrestrial support to the biomass was found towards the riparian forest areas (subsidising c.a. 70% vs. around 57% of fish biomass in littoral areas of riparian forest and open canopy, respectively).This study remarked the role of riparian forest areas as energetic subsidises to aquatic ecosystems. Management actions in newly formed reservoirs should include preserving riparian forests to avoid losing natural ecosystem subsidies.

中文翻译：

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河岸森林补贴了最近形成的亚热带水库中鱼类的生物量

沿岸森林可能是水生食物网的关键补贴。尽管大多数研究是在自来水进行的，但在储层中仍未研究补贴生物质的资源来源以及河岸覆盖物在食物网中的作用。这项研究评估了在巴西伊尤伊河最近形成的水库中森林河岸带作为食物网补贴的作用。比较了沿岸生境，沿岸森林和开放性林冠层之间的鱼类饮食以及碳和氮为鱼类生物燃料的来源。对鱼类和基础资源的稳定同位素进行采样以及贝叶斯混合模型的应用表明，在这个新近形成的水库中，大多数鱼类生产源自陆地碳。而且，在沿岸森林地区发现了对生物量的陆地支持增加（分别在沿岸森林和开放林冠的沿海地区补贴了约70％的鱼类生物量，而对鱼生物量的补贴约为57％）。精力充沛的对水生生态系统的补贴。在新形成的水库中的管理行动应包括保护河岸森林，以避免失去自然生态系统补贴。