%0 Journal Article
%T Planktonic Cyanobacteria of the tropical karstic lake Lagartos from the Yucatan Peninsula, Mexico Las cianobacterias planct¨®nicas del lago tropical c¨¢rstico Lagartos de la Pen¨ªnsula de Yucat¨¢n, M¨¦xico
%A Francisco Valadez
%A Gabriela Rosiles-Gonz¨¢lez
%A Antonio Almaz¨¢n-Becerril
%A Martin Merino-Ibarra
%J Revista de Biolog¨ªa Tropical
%D 2013
%I Universidad de Costa Rica
%X The tropical karstic lakes on the Mexican Caribbean Sea coast are numerous. However, there is an enormous gap of knowledge about their limnological conditions and micro-algae communities. In the present study, surface water samples were collected monthly from November 2007 to September 2008 to provide taxonomical composition and biovolume of planktonic cyanobacteria of the lake Lagartos from State of Quintana Roo, Mexico. Water temperature, pH, conductivity, salinity, soluble reactive phosphorus (SRP), dissolved inorganic nitrogen (DIN), and soluble reactive silica (SRSi) levels were also analyzed. A total of 22 species were identified. Chroococcales and Oscillatoriales dominated the phytoplankton assemblages during the study period. Chroococcus pulcherrimus, Coelosphaerium confertum, Cyanodyction iac, Phormidium pachydermaticum and Planktolyngbya contorta were recorded for the first time in Mexico. A surplus of DIN (mean value of 42.7¦ÌM) and low concentrations of SRP (mean value of 1.0¦ÌM) promoted the enhanced growth and bloom formation of cyanobacteria. The mean biovolume was 3.22X10(8)¦Ìm3/mL, and two biovolume peaks were observed; the first was dominated by Microcystis panniformis in November 2007 (7.40X10(8)¦Ìm3/mL), and the second was dominated by Oscillatoria princeps in April 2008 (6.55X10(8)¦Ìm3/mL). Water quality data, nitrates enrichment, and trophic state based on biovolume, indicated that Lagartos is a hyposaline, secondarily phosphorus-limited, and eutrophic lake, where the cyanobacteria flora was composed mainly by non-heterocystous groups. Los lagos c¨¢rsticos tropicales en la costa del Caribe mexicano son numerosos. Sin embargo, existe un enorme desconocimiento acerca de sus condiciones limnol¨®gicas y de las comunidades de microalgas que se desarrollan en ellos. El objetivo del presente estudio fue estudiar las condiciones limnol¨®gicas en las que crecen las poblaciones de cianobacterias planct¨®nicas del lago Lagartos, Quintana Roo, M¨¦xico. Las recolectas se realizaron de forma mensual entre noviembre 2007 y septiembre 2008. Las especies fueron identificadas y su biovolumen determinado. Se midieron in situ la temperatura del agua, pH, conductividad y salinidad. Tambi¨¦n, se analizaron las concentraciones de f¨®sforo reactivo soluble (SRP), nitr¨®geno inorg¨¢nico disuelto (DIN) y s¨ªlice reactivo soluble (SRSi). Se identificaron 22 especies de cianobacterias. Chroococcus pulcherrimus, Coelosphaerium confertum, Cyanodyction iac, Phormidium pachydermaticum y Planktolyngbya contorta fueron nuevos registros para M¨¦xico. Un exceso de DIN (valor promedi
%K ianobacteria
%K proliferaci¨®n
%K calidad del agua
%K nutrientes
%K eutr¨®fico
%K Quintana Roo
%K cyanobacteria
%K bloom
%K water quality
%K nutrients
%K eutrophic
%K Quintana Roo
%U http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442013000300035