Effects of Soil Salinity on Native Vegetation in the San Dieguito Lagoon

Overview

Objectives/Goals There have been several problems with restoring native vegetation to the San Dieguito Lagoon. We believed that the salinity of the soil had an effect on the type of growth within Disposal Site 32 (an area of attempted re-vegetation). The first plot we observed contained mostly the species Suaeda Taxifolia, while the second plot contained a mixture of Atriplex Lentiformis. Methods/Materials To find out if salinity was the culprit we took samples from the two different plots of and compared the salinity of the topsoil as well as soil six inches down. We used a conductivity probe to determine the salinity. Results The salinity of the topsoil was less than that of the salinity six inches down in both respective plots, which is expected. Our analysis indicated that the topsoil salinities are equal in both plots, while the salinity at six inches is different. Moreover, the salinity is greater in plot one with the Suaeda Taxifolia than the second plot with Atriplex. Conclusions/Discussion We can affirm that salinity varies within one disposal site, and that this variability affects the type plant growth by creating different environments in which the seeds must germinate.

Competition history

• CSEF 2011 Environmental Science · Entry S1131

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