Zooplankton community changes in relation to different macrophyte species: Effects of Egeria densa removal
Por:
Espinosa-Rodríguez C.A., Sarma S.S.S., Nandini, S.
Publicada:
1 ene 2021
Categoría:
Aquatic science
Resumen:
Macrophytes sometimes become a nuisaance, interfering with navigation,
fishing, and aesthetic purposes. Therefore, in many water bodies, the
macrophytes are periodically removed. However, with the removal of
macrophytes, changes occur in the physico-chemical properties of water
and the plankton associated with them. Here we describe the zooplankton
community composition using functional traits (feeding guilds and
habitat type) from littoral and open water zones in the central Mexican
waterbody Benito Juarez Reservoir for one year. In two sites, the
macrophyte Egeria densa was removed by the local administration, which
resulted in an increase of turbidity, chlorophyll a and phycocyanin
levels. Among rotifers, Polyarthra, Trichocerca, Lecane, Lepadella, and
Keratella were the dominant genera while for microcrustaceans, copepods,
Alona, Ceriodaphnia, Chydorus, and Simocephalus were the dominant
genera. Littoral sites had a higher number of microphagous and raptorial
species than open water; however, after macrophyte removal, microphagous
species were more reduced than raptorial species. Moreover, a decrease
in semi-planktonic and benthic-periphytic species, as well as an
increase in planktonic organisms was observed after macrophyte removal.
Nonmetric multidimensional scaling showed that before the removal of
Egeria, macrophyte sites were different from open water; however, after
the removal, the zooplankton community was similar in all sites.
Canonical correspondence analysis (CCA) showed that carbonates,
nitrates, oxygen, and turbidity were the strongest predictors
determining zooplankton composition. Our study showed that macrophyte
removal caused habitat modification and zooplankton community shifts
that reduce diversity and functional groups. (C) 2021 European Regional
Centre for Ecohydrology of the Polish Academy of Sciences. Published by
Elsevier B.V. All rights reserved.
Filiaciones:
Espinosa-Rodríguez C.A.:
Division of Research and Postgraduate Studies, Edificio Unidad de Morfofisiología, Universidad Nacional Autónoma de México, Campus Iztacala, Av. de los Barrios no. 1, Iztacala, Tlalnepantla, Edo, de Mexico, 54090, Mexico
Grupo de Investigación en Limnología Tropical, UIICSE, FES Iztacala, Universidad Nacional Autónoma de México, Av. De los Barrios 1, Col. Los Reyes Iztacala, Tlalnepantla, Estado de México, CP 54090, Mexico
Sarma S.S.S.:
Division of Research and Postgraduate Studies, Edificio Unidad de Morfofisiología, Universidad Nacional Autónoma de México, Campus Iztacala, Av. de los Barrios no. 1, Iztacala, Tlalnepantla, Edo, de Mexico, 54090, Mexico
Nandini, S.:
Division of Research and Postgraduate Studies, Edificio Unidad de Morfofisiología, Universidad Nacional Autónoma de México, Campus Iztacala, Av. de los Barrios no. 1, Iztacala, Tlalnepantla, Edo, de Mexico, 54090, Mexico
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