Título del libro: Lake Alchichica Limnology: The Uniqueness Of A Tropical Maar Lake
Título del capítulo: Metazooplankton: The Joys and Challenges of Living in a Saline, Oligotrophic, Warm Monomictic Lake
ELIZABETH ORTEGA MAYAGOITIA; JOSE ARTURO ALCANTARA RODRIGUEZ; ALFONSO LUGO VAZQUEZ; AIDEE MONTIEL MARTINEZ; JORGE CIROS PEREZ;
Autores externos:
Idioma:
Año de publicación:
2022
Palabras clave:
Diversification; Local adaptation; Metazooplankton; Phenotypic plasticity; Resource limitation; Vertical migration
Resumen:
From a structural point of view, the metazooplankton assemblage of Lake Alchichica has two peculiar traits: there are only three species, and they display highly variable population dynamics, both at seasonal and interannual scales. Data from 5 years of field sampling show that the microendemic calanoid copepod Leptodiaptomus garciai is the dominant species. In contrast, the rotifers Brachionus sp. ?Mexico? and Hexarthra cf. jenkinae are discontinuously present. A combination of field and laboratory experiments and molecular tools have unveiled that the zooplankton assemblage is restricted to the few species that can withstand the local conditions of salinity and food limitation, being L. garciai the most fitted species to both factors. This species evades the predation risk from planktivorous fish by performing diel vertical migrations that are partially ineffective when the anoxic hypolimnion develops. Moreover, likely due to the permanence of the water body and unfavorable conditions for the hatching of resting eggs in the dark, anoxic waters, L. garciai and B. sp. ?Mexico? have lost or reduced their capacity of producing resting eggs. This modification in their life-history traits limits the potential gene flow with other populations and the dispersal to new environments. Consequently, the peculiar combination of salinity, food limitation, depth, and the seasonal occurrence of the anoxic hypolimnion have shaped the ecological and evolutionary dynamics of zooplankton populations. Local adaptation and genetic isolation are diversification mechanisms that could also explain the occurrence of other endemisms across the tree of life in this fascinating environment. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2022.
Entidades citadas de la UNAM:
ISBN:
9783030790967
Editorial:
Springer International Publishing Nombre de la publicación:
Metazooplankton: The Joys and Challenges of Living in a Saline, Oligotrophic, Warm Monomictic Lake
Página inicial:
237
Página final:
260
