Variables ambientales que condicionan la productividad primaria neta de perifiton en humedales artificiales al Norte de Bogotá - Colombia
...
Jarro Castañeda, Alexandra Edilibeth | 2014
Human settlements, city expansion and little information about the importance of wetlands, have altered the structure and functions of wetlands. This is the reason artificial wetlands are created, as a need to find and create means to conserve fauna and flora, as well as contributing to landscape management. Periphyton is important because it is a water quality indicator due to its high sensitivity to changes. Besides it is an important natural foods source within the food web, also this community may be the biggest contributor to water ecosystem productivity.
This study aims to determine the environmental variables (physicochemical water variables and climate) that affect the net primary productivity of the periphyton communities in two artificial wetlands in the north of Bogotá Colombia, as a way to establish a relationship between water quality and productive behavior of the periphyton community.
Between February and March 2013 weekly sampling was conducted in both wetlands: “El refugio de la Tingua” at the U.D.C.A. University and the lake at the “Gimnasio San Angelo”. To determine the concentration of the physicochemical variables (silicates, ammonium, nitrites, nitrates, dissolved oxygen, total dissolved phosphorus, total dissolved nitrogen, alkalinity and hardness) analytical laboratory protocols were used and field sampling protocols were followed. Artificial substrates were used for the determination of the net primary productivity and analyzed by two complementary methodologies, the concentration of chlorophyll and the ash-free dry weight.
In general, for both wetlands, the variables that determine the overall net primary productivity of periphyton were: total dissolved nitrogen, total dissolved phosphorus, pH, turbidity, water temperature, hardness, dissolved oxygen and silicates.
LEER