Toxic cyanobacteria blooms of Mukhor Bay (Lake Baikal, Russia) during a period of intensive anthropogenic pressure

I. Tikhonova, A. Kuzmin, Galina Fedorova, E. Sorokovikova, Andrey Krasnopeev, A. Tsvetkova, Yu. R. Shtykova, S. Potapov, Maria Ivacheva, Tatyana Zabortzeva, Oksana Evstropyeva, I. Tomberg, N. Zhuchenko, A. Galachyants, O. Belykh
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引用次数: 1

Abstract

The status of Lake Baikal as a UNESCO World Heritage Site, due to its unique ecology and value as a global aquatic resource have resulted in strict environmental regulations to protect the watershed and biota it supports. Despite this, the ecosystem of the lake is being exposed to negative anthropogenic impact and deteriorating water quality. In this article, we describe the bioecological state of Mukhor Bay – the warmest bay of Lake Baikal and one which is actively visited by tourists. We try to highlight the environmental problems of Baikal and aim to change attitudes towards water resources in this unique ecosystem. We present data on the taxonomic, genetic, and biochemical characteristics of cyanobacteria blooms that develop in the plankton of the bay. Further, we establishing their risk to human health and provide information for the environmental state management. Toxic blooms of Dolichospermum lemmermannii (cyanobacteria) were detected in the phytoplankton of Mukhor Bay. The nutrients content and chlorophyll concentration was low and corresponded to the oligo-mesotrophic status. Microcystins were detected in the dried phytoplankton biomass and the water, coastal samples contained a higher amount of this toxin. We hypothesize that one of the factors contributing to toxic cyanobacteria growth in the Mukhor Bay is the nutrient loadings due to surface and groundwater runoff from surrounding area.
有毒的蓝藻开花穆霍湾(贝加尔湖,俄罗斯)在一段时间内密集的人为压力
贝加尔湖作为联合国教科文组织世界遗产的地位,由于其独特的生态和作为全球水生资源的价值,导致了严格的环境法规来保护它所支持的流域和生物群。尽管如此,湖泊的生态系统正面临着负面的人为影响和不断恶化的水质。本文介绍了贝加尔湖最温暖的海湾、游客最活跃的海湾——木湖湾的生物生态状况。我们试图强调贝加尔湖的环境问题,旨在改变人们对这一独特生态系统中水资源的态度。我们目前的数据分类,遗传和生化特征的蓝藻华发展的浮游生物的海湾。进一步,我们确定了它们对人类健康的风险,并为环境状态管理提供信息。在木可湾浮游植物中检测到蓝藻毒华。营养物质含量和叶绿素浓度较低,处于中营养化状态。在干燥的浮游植物生物量和水中检测到微囊藻毒素,沿海样品含有较高的微囊藻毒素。我们假设,导致有毒蓝藻生长的因素之一是来自周围地区的地表和地下水径流造成的营养负荷。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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