Ciliates and trophic state: A study in five adjacent urban ponds in Mexico City
Por:
Lugo-Vázquez A., Sánchez-Rodríguez M.R., Morlán-Mejía J., Peralta-Soriano L., Arellanes-Jiménez E.A., Escobar-Oliva M.A., Oliva-Martinez, M. G.
Publicada:
1 nov 2017
Resumen:
Aim: The ciliated protozoa are components of the microbial food web. A
relationship between species richness, number, and size of ciliates, and
the trophic state has been recognized in some works. The aim of this
study was to determine how the trophic differences affect the
protozooplankton composition, abundance, and biomass considering the
similarity in location and climatic conditions in five adjacent shallow
urban water bodies in Mexico City with differences in trophic state.
Methodology: Monthly protozooplankton samplings were conducted from
January to December 2015 and measured water temperature, dissolved
oxygen, specific conductance, pH and Secchi disk, RDP, TP, and
chlorophyll a. Integrated column samples for ciliates were obtained and
taxonomic richness, species density, and biomass by size class
calculated using in vivo, stained and Lugol fixed samples. ANOVA was
applied for environmental data comparison, and cluster analyses were
carried out using environmental and biological data. A redundancy
analysis was used to explain the variation of the ciliates biomass
related to physicochemical conditions.
Results: Ciliate densities and biomass varied accordingly with the
trophic state and showed higher values in the more productive ponds, and
lower values in the other ponds. Oligotrichia and Prostomatea were the
dominant taxonomic groups. Eastern Quarry ponds trophic state varied
from oligotrophic to near hypertrophic and abundance and biomass
variation of planktonic ciliates followed a trophic gradient, showing
higher values in more eutrophic systems. Ciliates in the range body size
of 30-50 mu m dominated the biomass in the ponds. An unexpected result
was the low species number and densities of the small size ciliates
(mainly Scuticociliatida) that often are important in eutrophic
conditions.
Interpretation: The relationship between the trophic state and the
abundance and biomass of plankton ciliates was confirmed. The size
fraction <20 mu m was not important, and the 30-50 mu m body size
ciliates were dominant even in the most productive ponds.
Filiaciones:
Lugo-Vázquez A.:
UNAM, FES Iztacala, Proyecto Invest Limnol Trop, Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Proyecto de Investigatión en Limnologia Tropical, FES Iztacala, Universidad Nacional Autónoma de México (UNAM), Av. de los Barrios No. 1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico, C.P. 54090, Mexico
Sánchez-Rodríguez M.R.:
UNAM, FES Iztacala, Proyecto Invest Limnol Trop, Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Proyecto de Investigatión en Limnologia Tropical, FES Iztacala, Universidad Nacional Autónoma de México (UNAM), Av. de los Barrios No. 1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico, C.P. 54090, Mexico
Morlán-Mejía J.:
UNAM, FES Iztacala, Proyecto Invest Limnol Trop, Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Proyecto de Investigatión en Limnologia Tropical, FES Iztacala, Universidad Nacional Autónoma de México (UNAM), Av. de los Barrios No. 1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico, C.P. 54090, Mexico
Peralta-Soriano L.:
UNAM, FES Iztacala, Proyecto Invest Limnol Trop, Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Proyecto de Investigatión en Limnologia Tropical, FES Iztacala, Universidad Nacional Autónoma de México (UNAM), Av. de los Barrios No. 1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico, C.P. 54090, Mexico
Arellanes-Jiménez E.A.:
UNAM, FES Iztacala, Carrera Biol, Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Carrera de Biología, FES Iztacala, UNAM, Av. de los Barrios, No. 1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico, C.P. 54090, Mexico
Escobar-Oliva M.A.:
UNAM, FES Iztacala, Carrera Biol, Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Carrera de Biología, FES Iztacala, UNAM, Av. de los Barrios, No. 1, Los Reyes Iztacala, Tlalnepantla, Estado de Mexico, C.P. 54090, Mexico
Oliva-Martinez, M. G.:
UNAM, FES Iztacala, Carrera Biol, Av Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
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