Resumen del producto

The Mexican Caribbean reef lagoons are oligotrophic ecosystems, where residual water discharges (RWD) associated with tourist activity to groundwater aquifer systems supply additional dissolved inorganic nitrogen (DIN) to these lagoons. The contribution of DIN can be exacerbated in years with extraordinary precipitation (> 2500 mm in 2013) in the Mexican Caribbean. Thalassia testudinum seagrass is characterized by anitrogen content < 2 % dry weight. If the DIN flow increases in exceptional rainfall, itis expected that the content of nitrogen in T. testudinum will increase with respect to thehistorical average precipitation (1200 mm) of the last 30 years. In the present work thenitrogen content in T. testudinum is quantified in order to determine changes associatedwith the RWD during the dry and rainy season from 2010 to 2016 in Akumal Bay. Thenitrogen content in the leaves of T. testudinum was quantified in an elemental analyzer.In the years of 2010, 2012, 2015 and 2016 the nitrogen content in T. testudinum wassimilar between dry and rainy season. In the years of 2013 and 2014, the nitrogencontent was higher in the rainy season with respect to the dry season. This evidencesuggests that in periods of extraordinary rainfall, the flow of DIN to the coastal lagoonsof the Caribbean increases, making this nitrogen available to the seagrass T. testudinum.

Palabras clave: seagrass; Mexican Caribbean; groundwater aquifer; oligotrophic; reef lagoons

Para obtener una copia del documento contacta la personal de la biblioteca a través del correo bibliocicimar{a}ipn.mx