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Investigating the Coastal Water Quality of the Galapagos Islands, Ecuador

  • Curtis H. StumpfEmail author
  • Raul A. Gonzalez
  • Rachel T. Noble
Chapter
Part of the Social and Ecological Interactions in the Galapagos Islands book series (SESGI, volume 1)

Abstract

The Galapagos Islands offer a unique ecological landscape found nowhere else in the world. However, a lack of water and sanitation infrastructure within populated areas of the Galapagos Islands has the potential to affect many of these ecosystem attributes. Specifically, a rapidly growing population and expanding impacts of tourism are contaminating the coastal environments of the Galapagos Islands. Water quality monitoring is conducted globally to provide important information on the incidence of dangerous microbial contamination. Fecal indicator bacteria (such as Enterococcus spp. and Escherichia coli) are quantified as proxies for the presence of pathogens that can be found in water that is contaminated with human and animal feces. These fecal indicator bacteria, however, cannot be used to indicate a specific source of fecal contamination. Recently, advancements have been made in the quantification of other alternative markers for human fecal contamination, such as members of the Bacteroidales group. These are bacteria or gene markers in the bacteria that are predominantly found in the human gastrointestinal tract and, as such, can be more accurate indicators of the presence of human fecal pollution. In this study, we used molecular techniques for measurement of DNA to quantify both Enterococcus spp. and Bacteroides spp. specific molecular markers of human fecal contamination in the coastal waters of San Cristobal and Santa Cruz islands. Enterococcus spp. and Bacteroides spp. specific molecular marker concentrations were high enough in certain locations to warrant concern. Human fecal pollution was present in both coastal marine beach waters and a brackish water lagoon popular for bathing and recreation. Since our study, the wastewater treatment plant on San Cristobal has been upgraded, possibly resulting in reduced microbial contamination. However, these results indicate that poor wastewater management could be posing a threat to human health for both residents and tourists, and the coastal environments of the Galapagos Islands. Improvements to marine water quality are critical to protect inhabitants, tourists, and the fragile ecosystem components of the Galapagos Islands and to ensure the long-term viability and sustainability of a unique place.

Keywords

Fecal Coliform Fecal Contamination Fecal Indicator Bacterium Galapagos Island Japan International Cooperation Agency 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The research was made possible through a University of North Carolina Center for Galapagos Studies SEED grant. Special thanks to Veronica Barragan and David Hervas for assistance with sample shipping and Philip Page and Carlos Mena for assistance with logistics. Also, thanks to Monica Green for sample verification and Rodney Gaujardo and Dana Gulbransen for map development. Additional thanks to Parque Nacional Galapagos for assistance with site selection and permission to conduct this research and, particularly, Washington Tapia and Javier López from the Galapagos National Park for assistance at the beginning of the project.

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Copyright information

© Springer Science+Business Media, LLC 2013

Authors and Affiliations

  • Curtis H. Stumpf
    • 1
    Email author
  • Raul A. Gonzalez
    • 2
  • Rachel T. Noble
    • 2
  1. 1.Crystal Diagnostics Ltd.RootstownUSA
  2. 2.Institute of Marine SciencesUniversity of North Carolina at Chapel HillMorehead CityUSA

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