Cyanobacterial biodiversity from different freshwater ponds of Thanjavur, Tamilnadu (India).
DOI:
https://doi.org/10.24310/abm.v32i0.7017Abstract
ABSTRACT. Cyanobacterial biodiversity from different freshwater ponds of Thanjavur, Tamilnadu
(India). Studies on the cyanobacterial biodiversity of 5 different freshwater ponds in and around
Thanjavur, Tamilnadu during summer month (June, 2004) has been made and compared their variations
among five different ponds. In addition, certain physico-chemical parameters of pond waters such as
dissolved oxygen, net productivity, pH, carbonate, bicarbonate, nitrate, nitrite, total phosphorus,
inorganic phosphorus etc. were also analyzed and statistically compared with the cyanobacterial
diversity. Totally 39 species of 20 genera of cyanobacteria were recorded in all 5 different ponds.
Only 6 species of cyanobacteria were identified in Pond 1 (Dabeerkulam), where a massive bloom of
Microcystis aeruginosa was recorded, which had a significant effect in reducing the other
cyanobacterial population. As many as five species namely Aphanothece microscopica, Synechocystis
aquatilis, Merismopedia glauca, Oscillatoria limnetica and O. subbrevis were common in all the
ponds surveyed except in Pond 1.
Key words. Biodiversity, ecosystem, cyanobacteria, Oscillatoria, Microcystis.
RESUMEN. Biodiversidad de cianobacterias en diferentes charcas de agua dulce de Thanjavur,
Tamilnadu (India). Se ha inventariado, y comparado entre sí, la biodiversidad de cianobacterias de 5
charcas de agua dulce de Thanjavur, Tamilnadu (India); el estudio se llevó a cabo en junio de 2004.
En paralelo, también se determinaron los valores de ciertos parámetros físico-químicos que podrían
explicar las variaciones en los valores de biodiversidad: oxígeno disuelto, productividad neta, pH,
carbonato, bicarbonato, nitrato, nitrito, fósforo total, fósforo inorgánico, etc. Un total de 39 especies
de 20 géneros de cianobacterias se identificaron entre las 5 charcas. En la charca 1 (Dabeerkulam) se
detectaron 6 especies, pero cuando tuvo lugar una flor de agua de Microcystis aeruginosa las restantes
especies apenas se pudieron detectar. Cinco especies (Aphanothece microscopica, Synechocystis
aquatilis, Merismopedia glauca, Oscillatoria limnetica y O. subbrevis fueron comunes en todas las
charcas con excepción de la número 1.
Palabras clave. Biodiversidad, cianobacterias, ecosistema, Oscillatoria, Microcystis.
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