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- Title
Groundwater microbial diversity and antibiotic resistance linked to human population density in Yucatan Peninsula, Mexico.
- Authors
Moore, Anni; Lenczewski, Melissa; Leal-Bautista, Rosa Maria; Duvall, Melvin
- Abstract
Microbial community composition in selected karst groundwater sites in the Yucatan Peninsula, Mexico, was assessed to determine the environmental variables influencing groundwater microbial diversity. The karst aquifer system is a groundwater-dependent ecosystem and is the world's second largest underwater karst cave system. The area's geology allows precipitation to infiltrate into the groundwater system and prevents accumulation of surface water; as such, groundwater is the only source of fresh water on the peninsula. The sampling locations consisted of three karst sinkholes that extend through the freshwater zone into the saline water, and an abandoned drinking water well of an ocean-side resort, during the dry and rainy seasons. The analysis showed that highly diverse microbial communities are present in the Yucatan groundwater, sustained by permanently warm temperatures and high nutrient input from human activity. Proximity to densely populated areas, such as tourist resorts, is the most important factor influencing both the diversity and presence of fecal bacteria and the antibiotic resistance profile.
- Subjects
YUCATAN (Mexico : State); MEXICO; DRUG resistance in bacteria; POPULATION density; MICROBIAL diversity; FRESH water; DRINKING water; GROUNDWATER
- Publication
Canadian Journal of Microbiology, 2020, Vol 66, Issue 1, p46
- ISSN
0008-4166
- Publication type
Article
- DOI
10.1139/cjm-2019-0173