Zooplankton community structure in relation to microcystins in the eutrophic Lake Zumpango (State of Mexico)
Por:
Figueroa-Sanchez, Michael A., Nandini, S., Sarma, S. S. S.
Publicada:
1 abr 2020
Resumen:
We studied the seasonal variation of rotifers, cladocerans and copepods
in Lake Zumpango, Mexico City, from June 2010 to May 2011. Physical and
chemical variables of the water were measured at three sites, while 50 L
of water was filtered from these sites to study the zooplankton
abundance, diversity and biomass. The water temperature ranged from 14
to 23 degrees C, and nitrate and phosphate concentrations from 0.2 to 1
and 4 to 14 mg L-1, respectively. Microcystis sp. Dolichospermum sp. and
Planktoihrix sp. were present throughout the year. Microcystin
concentrations were between 0.06 to 11.7 mu g L-1, but for six months
the concentrations exceeded 1 mu g L-1 (1.1 to 11.7 mu g L-1), with the
highest concentrations observed in August and October. We recorded 33
species of rotifers, including Brachionus angularis (1 to >11000 ind.
L-1), and Brachionus havanaensis (1 to 6683 ind. L-1), while the most
abundant cladoceran was Moina micrura (about 10 ind. L-1). The species
diversity ranged from 0.8 to 2.9 bits ind(-1), but small (<250 mu m)
zooplankton (rotifers and copepod nauplii) dominated the community.
Filiaciones:
Figueroa-Sanchez, Michael A.:
UNAM, Ciencias Mar & Limnol, Cd Univ, Coyoacan 04510, Cd Mexico, Mexico
Nandini, S.:
UNAM, Lab Zool Acuat, Div Invest & Posgrad, Edificio UMF, Tlalnepantla, Edo De Mexico, Mexico
Sarma, S. S. S.:
UNAM, Lab Zool Acuat, Div Invest & Posgrad, Edificio UMF, Tlalnepantla, Edo De Mexico, Mexico
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