Coastal zones are dominated by economically important ecosystems, and excessive urban, industrial,
agricultural, and tourism activities can lead to rapid degradation of those habitats and resources.
Groundwater in the Eastern Yucatan Peninsula coastal aquifer discharges directly into the coastal ocean
affecting the coral reefs, which are part of the Mesoamerican Coral Reef System. The composition and
impacts of groundwater were studied at different coastal environments around Akumal (SE Yucatan
Peninsula). Radium isotopes and salinity were used to quantify fresh groundwater and recirculated
seawater contributions to the coastal zone. Excess Ra distribution suggests spatially variable discharge
rates of submarine groundwater. High NO3
levels and high coliform bacteria densities indicate that
groundwater is polluted at some sites. Dissolved phosphorous content is elevated in the winter and
during the high tourism season, likely released from untreated sewage discharge and from aquifer sediments
under reducing conditions.
Coastal zones are dominated by economically important ecosystems, and excessive urban, industrial,agricultural, and tourism activities can lead to rapid degradation of those habitats and resources.Groundwater in the Eastern Yucatan Peninsula coastal aquifer discharges directly into the coastal oceanaffecting the coral reefs, which are part of the Mesoamerican Coral Reef System. The composition andimpacts of groundwater were studied at different coastal environments around Akumal (SE YucatanPeninsula). Radium isotopes and salinity were used to quantify fresh groundwater and recirculatedseawater contributions to the coastal zone. Excess Ra distribution suggests spatially variable dischargerates of submarine groundwater. High NO3 levels and high coliform bacteria densities indicate thatgroundwater is polluted at some sites. Dissolved phosphorous content is elevated in the winter andduring the high tourism season, likely released from untreated sewage discharge and from aquifer sedimentsunder reducing conditions.
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