®®®® SIIA Público

Título del libro: Lake Alchichica Limnology: The Uniqueness Of A Tropical Maar Lake
Título del capítulo: The Littoral Environment

Autores UNAM:
JAVIER ALCOCER DURAND; ELVA GUADALUPE ESCOBAR BRIONES; LUIS ALBERTO OSEGUERA PEREZ;
Autores externos:

Idioma:

Año de publicación:
2022
Palabras clave:

Environmental heterogeneity; Littoral sediments; Littoral water column; Stromatolites


Resumen:

Lake Alchichica water level is decreasing. The formerly extended littoral zone has been reduced. Today the littoral zone is quite heterogenous in both water and sedimentary characteristics. There are areas with fine sediments and extensive vegetation cover (Ruppia maritima, filamentous benthic algae) and well protected from the wave action, to areas with coarse sediments, devoid of vegetation cover exposed to strong wave action. Sediments are mostly coarse (silty sands) and carbon enriched. Water temperature is relatively warm (18 °C) but fluctuated about 10 °C on a daily basis. The shallow water column remains well oxygenated (~120% saturation) and alkaline (pH = 9). Differently, electric conductivity (from fresh to saline) and nutrient concentrations (from oligo up to eutrophic) change from site to site. Environmental heterogeneity is largely associated to the stromatolite ring?s presence that provides a structural complexity to the littoral zone by imposing different degrees of physical interaction/interchange between the littoral and the pelagic zones from fully interconnected with the pelagic zone to completely isolated from it. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2022.


Entidades citadas de la UNAM: