Department of Water Protection, Faculty of Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland.
Department of Water Protection, Faculty of Biology, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland.
Sci Total Environ. 2024 Nov 1;949:174932. doi: 10.1016/j.scitotenv.2024.174932. Epub 2024 Jul 27.
Small and shallow water bodies are particularly sensitive to adverse conditions connected with anthropogenic eutrophication. As model systems, ponds are a good object for ecological research and monitoring of global environmental changes. We examined cyanobacteria along with other groups of algae versus zooplankton and abiotic characteristics of water in 51 aquatic ecosystems exposed to anthropogenic pressure (from natural forest to highly disturbed field ponds) with 3 distinct trophic groups: meso-, eu- and hypertrophic. This study aimed to define how different levels of trophy affect pond-specific cyanobacteria assemblages and to identify species responding to particular trophic states. We demonstrated that trophic type determined the occurrence of certain cyanobacteria species. From among 78 identified taxa, shade- and turbid mixed adapted were the most numerous. Eutrophic ponds had the highest cyanobacteria species and diversity and abundance of zooplankon. Dominating species such as Chroococcus minimus, Anagnostidinema amphibium, Phormidium granulatum or Komvophoron minutum preferred mesotrophic, while e.g. Jaaginema subtilissimum, Limnolyngbya circumcreta, Limnothrix vacuolifera or Romeria leopolienis eutrophic waters and these were not grazed by filtrators. Only 3 species (Aphanizomenon flos-aquae, Dolichospermum circinale, Planktothrix agardhii) were associated with hypertrophic ponds. Therefore, we assume that cyanobacteria taxa have a high indicative potential to distinguish between trophic type of ponds. Reynolds Functional Groups also exhibit responses to changes in water quality. It was partucularly evident in the case of cyanobacteria representatives of codon M which was attributed to eutrophic ponds. Advancing our understanding about trophic preferences of cyanobacteria is crucial, especially in the era of global warming and the persistent issue of water eutrophication, when problems with harmful cyanobacterial blooms are intensifying. The research findings have ecological significance and management implications, highlighting the often-overlooked importance of pond ecosystems in maintaining overall water quality.
小型浅水体对与人为富营养化有关的不利条件特别敏感。作为模型系统，池塘是生态研究和监测全球环境变化的良好对象。我们检查了池塘中的蓝藻以及其他藻类与浮游动物和水的非生物特性，这些池塘暴露在人为压力下（从天然森林到高度受干扰的田间池塘），分为 3 个不同的营养组：中营养、中营养和富营养。本研究旨在定义不同营养水平如何影响特定池塘的蓝藻群落，并确定对特定营养状态有反应的物种。我们表明，营养类型决定了某些蓝藻物种的出现。在 78 种鉴定的分类群中，阴生和浑浊混合适应的蓝藻种类最多。富营养池塘的蓝藻物种最多，浮游动物的多样性和丰度也最高。优势物种如 Chroococcus minimus、Anagnostidinema amphibium、Phormidium granulatum 或 Komvophoron minutum 更喜欢中营养型，而 e.g. Jaaginema subtilissimum、Limnolyngbya circumcreta、Limnothrix vacuolifera 或 Romeria leopolienis 则更喜欢富营养型水体，而这些水体不会被滤食者捕食。只有 3 种（鱼腥藻、水华束丝藻、束丝藻）与富营养型池塘有关。因此，我们假设蓝藻类群具有很高的指示潜力，可以区分池塘的营养类型。Reynolds 功能群也对水质变化有反应。在 codon M 的蓝藻代表中尤为明显，这归因于富营养型池塘。深入了解蓝藻的营养偏好至关重要，尤其是在全球变暖的时代和持续存在的水体富营养化问题下，有害蓝藻水华问题日益加剧。研究结果具有生态意义和管理意义，突出了池塘生态系统在维持整体水质方面的重要性，而这一点常常被忽视。
