Impact of native and invasive cyclopoid predators in relation to the diversity of the zooplankton community
Por:
Valencia-Vargas, Meetztli Alejandra, Nandini, S., Paez, M. E. Castellanos, Sarma, S. S. S.
Publicada:
23 nov 2022
Ahead of Print:
1 oct 2022
Resumen:
The ecological impact of invasive species may be less in communities
with high species diversity. We hypothesized that the feeding rates of
an invasive copepod would be unaffected by high species diversity of
prey in the medium as compared with a native species which would have
reduced feeding rates under similar conditions. The biotic resistance to
prey consumption was evaluated by testing consumption rate of the
invasive species: Mesocyclops pehpeiensis and the native species:
Mesocyclops longisetus curvatus, Acanthocyclops americanus, Eucyclops
sp. and Microcyclops dubitabilis separately exposed to two treatments:
high diversity with 13 prey species (rotifers and microcrustaceans) and
low diversity with three prey species (determined on the basis of
previous studies on zooplankton diversity in Mexican water bodies). We
also tested the prey preference index of M. pehpeiensis in the absence
and presence of the native copepod M. longisetus curvatus. M.
pehpeiensis consumed the same number of prey in both treatments,
regardless of high or low diversity conditions, whereas the four native
species consumed less prey in the high diversity than the low diversity
treatments. High community diversity may not represent an obstacle to
the successful establishment of the invasive exotic copepod M.
pehpeiensis.
Filiaciones:
Valencia-Vargas, Meetztli Alejandra:
Univ Autonoma Metropolitana, Ciencias Biol & Salud, Mexico City, DF, Mexico
Nandini, S.:
(Corresponding Author), Univ Nacl Autonoma Mexico, Lab Zool Acuat, UMF, FES Iztacala, Av Los Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Univ Nacl Autonoma Mexico, Lab Zool Acuat, UMF, FES Iztacala, Av Los Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
Paez, M. E. Castellanos:
Univ Autonoma Metropolitana, Dept Hombre & Ambiente, Lab Rotiferol & Biol Mol Plancton, Unidad Xochimilco, Ciudad De Mexico 04960, Mexico
Sarma, S. S. S.:
Univ Nacl Autonoma Mexico, Lab Zool Acuat, UMF, FES Iztacala, Av Los Barrios 1, Tlalnepantla 54090, Estado De Mexic, Mexico
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