The influence of salinity on the distribution of Egeria densa in the Valdivia river basin, Chile
The influence of salinity on the distribution of Egeria densa in the Valdivia river basin, Chile
Authors
Hauenstein Barra, Enrique
Ramírez García, Carlos
Ramírez García, Carlos
Authors
Date
2012-08-13
Datos de publicación:
Archiv fuer Hydrobiologie, Vol.107, N°4, 511-519, 1986
Keywords
Salinidad - Macrófitas
Collections
Abstract
A sudy was made regarding the influence of salinity on the distribution of Egeria
densa in the Valdivia river basin, Chile. Measurements were taken of the biomass of this
species from locations of differing salinity within the range of its distribution in the Valdivia river. In the laboratory, the growth and photosynthetic rates of shoots kept in different saline concentrations were recorded. It was found that Egeria densa tolerates salinities up to 5g/l, which grow naturally in the Valdivia river. In the laboratory, by
contrast, it prospers in concentrations up to around 8g/l. In concentrations up to
around 1 g/l there is a clear stimulation of shoots growth; in greater concentrations a
slight inhibition of photosynthesis, growth and adventitious roots production is noted.