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Type: Article
Published: 2016-08-31
Page range: 173–183
Abstract views: 25
PDF downloaded: 1

Anabaenopsis morphospecies (Cyanobacteria, Nostocales) from Los Patos shallow lake (Province of Buenos Aires, Argentina)

INBIOTEC-CONICET y CIB-FIBA, Vieytes 3103, Mar del Plata 7600, Argentina
Institute of Botany, Academy of Sciences of the Czech Republic, Dukelská 135, 37982 Třeboň, Czech Republic
División Ficología, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata & CIC-BA, Paseo del Bosque s/n°, La Plata 1900, Argentina
Anabaenopsis Argentine biodiversity cyanobacterial blooms shallow lakes Algae

Abstract

The genus Anabaenopsis comprises about 20 morphospecies distributed in plankton of tropical, subtropical and temperate regions during warm periods. The morphological diversity and population dynamics of Anabaenopsis species from one artificial shallow lake from the Province of Buenos Aires, Argentina, was studied during summer 2005 and 2006; and from April 2012 to May 2014. The most common and abundant species were identified as A. elenkinii and A. cf. cunningtonii (first report in Argentina). Anabaenopsis circularis and A. milleri (first report in the American continent and Argentina) were less common, whereas A. nadsonii was rarely observed. Almost all species contributed to algal blooms during warm periods. However, some species were registered even under the lowest temperatures recorded (7.5 °C) and sustained biovolume also during winter (A. milleri, A. elenkinii and A. cf. cunningtonii). These results indicate that some species of the genus are capable of growing at temperatures much lower than 20°C. The species richness noted in this study suggests that there is likely much more diversity remaining on this genus to be reported in Argentina.