Relationships among nitrogen and total phosphorus, algal biomass and zooplankton density in the central Amazonia lakes
Enlace de publicación: http://link.springer.com/article/10.1007/s10750-007-0705-7
Año de publicación: 2007
Autor de la publicación: Trevisan, G. V., and B. R. Forsberg
Revista de publicación: Hydrobiologia
The relationship among concentrations of total nitrogen (TN), total phosphorus (TP), algal biomass (Chl) and the density and size of individuals of the zooplankton community were studied for the dry season (November 1999–January 2000) at 20 lakes of the Central Amazonia. The study was conducted along a productivity gradient to identify the existence of resource or predator-dependent patterns on the primary producers of the trophic web. A strong positive relationship was observed between the log Chl and TN (r2 = 0.88, P = 0.000) and to log Chl and log TP (r2 = 0.85, P = 0.000) in a simple linear regression. However, when both variables were running together in a multiple regression, TN alone explained every variation of algal biomass (r2 = 0.89, PTN = 0.022, PTP = 0.233).