NDLI: Phytoplankton diversity and cyanobacterial dominance in a hypereutrophic shallow lake with biologically produced alkaline pH

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Phytoplankton diversity and cyanobacterial dominance in a hypereutrophic shallow lake with biologically produced alkaline pH

Content Provider	Semantic Scholar
Author	López-Archilla, Ana Isabel Moreira, David López-García, Purificación Guerrero, Carmen
Copyright Year	2003
Abstract	In this work, we have characterized the diversity of phytoplanktonic species in a highly alkaline and hypereutrophic shallow lake, Santa Olalla (southwestern Spain), the evolution of their relative abundances, and that of several physicochemical parameters over 2 years. In the absence of an external input of alkaline water, Santa Olalla's stable high pH (average pH 9.52, with several maxima >10.5) is explained by an extremely high photosynthetic primary productivity. A variety of phytoplankton species was observed even during pH maxima. These included several species of green algae, diatoms, and euglenoids and several cyanobacteria from the orders Nostocales and Chroococcales. Quantitatively, cyanobacteria dominated. A blooming event due to Aphanothece clathrata was observed at one pH maximum, during which the diversity as measured by the Shannon-Weaver index was extremely low. Santa Olalla's cyanobacteria are alkaliphilic and/or extremely alkalitolerant and appear to be responsible for the generation and maintenance of stable high-pH conditions in their environment.
Starting Page	109
Ending Page	115
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1007/s00792-003-0369-9
PubMed reference number	15064977
Journal	Medline
Volume Number	8
Alternate Webpage(s)	http://max2.ese.u-psud.fr/publications/pdf36.pdf
Alternate Webpage(s)	https://doi.org/10.1007/s00792-003-0369-9
Journal	Extremophiles
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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