Dinámica del ensamblaje algal epifítico en el sistema de planos inundables de Ayapel a través del pulso de inundación
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Montoya Moreno, Yimmy | 2013-07
Spatial and temporal variations of the epiphytic algae
assemblages associated with roots of macrophytes in
14 sampling sites, seven zones with lentic and seven with
lotic conditions of the Ayapel flood plain was evaluated. It
was determined that the degree of connectivity between
the river, the streams and swamp increased in high waters
which produced physico-chemical uniformity conditions and
limited the development local conditions. Thus, the most
isolated bodies reach a greater degree of independence from
the main body due to the formation of horizontal gradients.
This individualization of the physico-chemical conditions is
most evident in the low water phase. Diversity and richness of
species variation at the spatial level was found, as well as lower
floristic similarity (30%) between the periphytics assemblages
which favored the recorded high species richness. Diatoms
predominated in the system, being favored by ammonium
concentration; their abundance decreased with precipitation
increase. Chlorophyceae are favored by the precipitation
increase, variation in water level, low concentrations of
nitrates, nitrogen ammoniacal and electrical conductivity.
Low concentrations of nutrients and the decrease of
precipitation favor the development of the cyanobacteria.
Finally, Euglenophyceae, Dynophyceae and Chrysophyceae
are considered as minority algal groups within the epiphytic
assembly
LEER