phytoplankton dynamics in La Antigua River, Mexico
Gaytán-Herrera1, E. Cuna-Pérez2 and P. Ramírez-García1*
Postgraduate Division, UNAM, FES-Iztacala, Av. de los Barrios No. 1, 54090
Tlalnepantla, Estado de México, México
Paleolimnology Laboratory, UNAM, FES-Iztacala, Av. de los Barrios No. 1,
54090 Tlalnepantla, Estado de México, México
Author E-mail: email@example.com
La Antigua River
Paper received : 20.07.2016
Revised received : 21.04.2017
Re-revised received :
Accepted : 06.06.2017
Aim: To contribute to
the knowledge of rivers in Mexico, we studied the phytoplankton abundance and
diversity over a year in La Antigua River, east Mexico.
sampling was performed for one year (March 2013 to February 2014), at 5
stations. Physicochemical parameters and chlorophyll-a were analyzed. A
diagram of Holston-Tukey was performed to identify the dominant, constant,
temporary and rare species Detrended Correspondence Analysis was applied to
find possible links between species and environmental variables.
Shannon-Wiener index was calculated.
water temperature was 26°C and depth was 1.7 m, dissolved oxygen was 8.9 mg l-1,
pH was 7.8, turbidity value was 10.6 NTU, conductivity was 488 µS cm-1,
SRP and nitrate were 2.6 µg l-1 PO4-3-P and
0.6 mg l-1 NO3-N, chlorophyll-a was 5 µg l-1.
About 200 taxa of microalgae were recorded. Diatoms were dominated.
Chlorophyceae were rich in species. Cyanoprokaryota ranked third in species
richness, Euglenophyceae, Dinophyceae, Cryptophyceae and Crysophyceae had a lower
2 and 3 had the highest contamination by wastewater discharges of the
population of La Antigua. Stations 4 and 5 were separated due to increases in
salinity. These stations are the closest to the sea. Station 1 is likely to
be cleaner and less salty.
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