The macrophyte–algae relationship has primary importance in affecting the functioning of shallow lake ecosystems. However, how substratum type, grazing, and nutrient status affect the relationship, is still largely unknown. Here, we studied algal assemblages covering either the submerged macrophyte, Ceratophyllum demersum, or artificial plastic plants with similar morphological complexity to answer these questions. Nutrient status was assessed as euand hypertrophic conditions in two separate lakes. In contrast to previous studies, the algal community on artificial substrates resembled to those observed on C. demersum. Independently of nutrient status (lakes), algae colonised artificial substrates intensively, but the highest algal biomass was observed in the hypertrophic lake. The community of periphytic algae was represented by diatoms, chlorophytes, and cyanobacteria. In the eutrophic lake, rather diatoms were present with high relative abundance, whereas, in the hypertrophic lake, rather cyanobacteria prevailed. Grazing pressure was high in both lakes and in the case of both substrate types, affecting the biomass of periphytic algae significantly. Our results indicate that macroinvertebrate grazing plays a crucial role in affecting periphytic algal biomass, independently of nutrient status and substratum type in shallow lakes. Ac c pte d A tic le

中文翻译：

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放牧影响周围植物-大型植物关系中的附生藻类生物量，与底物类型和营养状况无关

大型植物-藻类关系在影响浅湖生态系统的功能方面具有重要意义。然而，基质类型、放牧和营养状况如何影响这种关系，仍然很大程度上未知。在这里，我们研究了涵盖沉水大型植物、Ceratophyllum demersum 或具有相似形态复杂性的人造塑料植物的藻类组合，以回答这些问题。营养状况被评估为两个独立湖泊中的eu和肥大条件。与之前的研究相比，人工基质上的藻类群落类似于在 C. demersum 上观察到的藻类群落。独立于营养状况（湖泊），藻类在人工基质上大量定居，但在肥厚的湖泊中观察到最高的藻类生物量。附生藻类群落以硅藻为代表，叶绿素和蓝藻。在富营养化的湖泊中，相当多的硅藻存在，而在肥厚的湖泊中，则以蓝藻为主。两个湖泊和两种基质类型的放牧压力都很高，显着影响了附生藻类的生物量。我们的结果表明，大型无脊椎动物放牧在影响浅湖中的附生藻类生物量方面起着至关重要的作用，而与养分状况和基质类型无关。已接受的文章 我们的结果表明，大型无脊椎动物放牧在影响浅湖中的附生藻类生物量方面起着至关重要的作用，而与养分状况和基质类型无关。已接受的文章 我们的研究结果表明，大型无脊椎动物放牧在影响浅湖中的附生藻类生物量方面起着至关重要的作用，而与养分状况和基质类型无关。已接受的文章