Multiannual variations in Microcystis bloom episodes - Temperature drives shift in species composition.

Autor: Ninio S; Kinneret Limnological Laboratory (KLL) Israel Oceanographic and Limnological Research (IOLR), P.O.Box 447, Migdal, 49500, Israel., Lupu A; Kinneret Limnological Laboratory (KLL) Israel Oceanographic and Limnological Research (IOLR), P.O.Box 447, Migdal, 49500, Israel., Viner-Mozzini Y; Kinneret Limnological Laboratory (KLL) Israel Oceanographic and Limnological Research (IOLR), P.O.Box 447, Migdal, 49500, Israel., Zohary T; Kinneret Limnological Laboratory (KLL) Israel Oceanographic and Limnological Research (IOLR), P.O.Box 447, Migdal, 49500, Israel., Sukenik A; Kinneret Limnological Laboratory (KLL) Israel Oceanographic and Limnological Research (IOLR), P.O.Box 447, Migdal, 49500, Israel. Electronic address: assaf@ocean.org.il.
Jazyk: angličtina
Zdroj: Harmful algae [Harmful Algae] 2020 Feb; Vol. 92, pp. 101710. Date of Electronic Publication: 2019 Dec 09.
DOI: 10.1016/j.hal.2019.101710
Abstrakt: Cyanobacteria are notorious for producing water blooms and for toxin formation. Toxic cyanobacterial blooms present an ever-increasing serious threat to both the quality of drinking water and recreational uses and severely disrupt aquatic ecosystems, worldwide. In many cases, such blooms are dominated by toxic Microcystis sp. that produce a family of structurally similar hepatotoxins, known as microcystins (MCs). Here we present a retrospective analysis of Microcystis seasonal blooms from Lake Kinneret (Sea of Galilee, Israel) indicating that the population is composed of at least 25 different genotypes and two different chemo-types, whose relative abundance changes over decades. Based on a long-term record of biotic and abiotic parameters and laboratory experiments we propose that minor increase in water temperature, but not in salinity, may affect Microcystis community structure by changing the relative abundance of species/strains from toxic to less or non-toxic species.
Competing Interests: Declaration of Competing Interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
(Copyright © 2019 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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