Israeli-Ecuadorian Study Finds Toxic Pollutants in Galapagos Marine Ecosystems
A joint Israeli-Ecuadorian research team has discovered various toxic pollutants in the marine ecosystems of the Galapagos Islands, located about 1,000 kilometers off Ecuador's coast in the Pacific Ocean. Known globally for their unique and fragile biodiversity and UNESCO World Heritage status, the islands face increasing threats from human activity despite their remote and protected nature.
The study, led by Professor Ariel Kushmaro from Ben-Gurion University of the Negev's School of Sustainability and Climate Change, in collaboration with the University of San Francisco de Quito, collected water samples from six human-impacted sites such as ports and tourist beaches, and four pristine sites closed to human activity. Chemical analyses revealed the presence of artificial pollutants including petroleum hydrocarbons, pharmaceuticals, personal care products, pesticides, industrial chemicals like plasticizers, flame retardants, synthetic hormones, and UV filters from cosmetics, at concentrations ranging from 1 to 100 parts per million.
These pollutants exhibit high dispersal capabilities, threatening marine ecosystem health. Active pharmaceutical ingredients were detected in tissues of invertebrates such as shellfish and reef-building corals. Some UV filters found can disrupt wildlife hormonal systems, affecting reproduction, growth, and metabolism. Notably, a UV filter (4-MBC) was detected even in two pristine sites, highlighting ocean currents' role in spreading contaminants beyond their sources.
The researchers attribute pollution to inadequate waste management, untreated sewage discharge, and large industrial fishing fleets near the marine reserve, which contribute to chemical and plastic pollution. Previous studies have documented bioaccumulation of heavy metals like mercury and cadmium in commercially important fish species, sometimes exceeding safe consumption levels.
Professor Kushmaro emphasized the urgent need for quantitative monitoring and management strategies to protect this iconic marine reserve. Dr. Valeria Ochoa-Herrera from the University of San Francisco de Quito stressed the global responsibility to preserve the Galapagos due to their biological importance and worldwide environmental impact. The study was published in Regional Studies in Marine Science and supported by the Goldman Sonnenfeldt School of Sustainability and Climate Change and a UFSQ-BGU collaboration grant.
