Researchers sampled over 70 seafood species in Pacific waters and discovered the presence of plastic and textile contaminants.

An investigation into the quality of fish in California and Indonesia has shown that prominent species in the seafood chain are contaminated with plastic and textile fibers.

Researchers analyzed the contents of two fish markets and found human-derived debris caused by differing waste management systems that could potentially harm consumers.

The Study

The study was able to discern the kinds of contaminants prominent in fish caught in different coasts along the Pacific Ocean.
Image: Vegan-Magazine

Researchers led by Chelsea Rochman at the University of California-Davis School of Veterinary Medicine sampled a variety of fish species in Half Moon Bay and Princeton, California and in Makassar, Indonesia.

The California sample included 76 fish from 12 species along with one species of shellfish. In Indonesia, the researchers sampled 76 fish from 11 species. The fish were caught by regular fisherman in local waters.

Researchers dissected the fish species and analyzed the contents of their guts. The process of chemically dissolving tissue allowed them to uncover plastic and fiber debris inside the fish.

In the Indonesian sample, 55 percent of fish possessed human-derived debris, including Indian mackerel, shortfin scad and silver-stripe round herring. Of the fish sampled, 28 percent contained debris.

One fish had a total of 21 pieces of plastic in its guts, as plastic debris were most prominent in Indonesia’s fish.

In the sample taken in California, 67 percent of species had debris, including the pacific oyster, pacific anchovy, striped bass and Chinook salmon. About 25 percent of the fish sampled were affected.

Researchers noted a difference between the kinds of debris in each location, with American fish posessing mostly textiles pollutants compared to the plastic pollutants dominating Indonesian waters.

“I was very surprised to see such a difference in type of debris between locations,” Rochman said.

Causes Of Contamination

Textile fibers from washing machine wastewater was found in fish sold in the United States.
Image: Chemical & Engineering News

Each country has a different system used to dispose of waste. Researchers believe that these systems illustrate why fish species in certain areas contain different contaminants.

In Indonesia, the waste management system allows plastics to be thrown into the ocean. The United States has implemented a plastic recycling initiative, which accounts for the lack of plastic debris.

Fish near the California coast contain high levels of textile fibers, which could be attributed to the prevalence of washing machines. The discharge from washing machines is sent to wastewater treatment plants, where it could easily seep into the ocean.

“Fibres are a ubiquitous contaminant in the effluent from wastewater treatment plants due to their small size and abundance in the waste stream. They have been found in several marine habitats and animals,” Rochman said.

Consumption of textile and plastic fibers can cause a number of health concerns, but the extent remains unclear until more research is conducted. Rochman urges policymakers and citizens to protect the oceans in order to keep the problem from worsening.

The post Textile And Plastic Pollution Found Inside Pacific Seafood appeared first on Citizens Report.

Studies show the Grand Canyon has been contaminated by mercury and selenium from a nearby coal burning power plant and distant river irrigation runoff.

The Grand Canyon has been a world heritage site since 1979. Despite the desire to protect it, pollution has permeated its natural features.

Findings from a recent U.S. Geological Survey study shows alarming levels of mercury and selenium in the Grand Canyon’s ecosystem, creating a risk for fish, other area wildlife and humans.

The Study

Mercury is a dangerous chemical that has been linked to autism, psychotic reactions, hallucinations, suicidal tendencies and delirium.
Via: RSC

Researchers examined six waterways that connected to the Colorado River through the Grand Canyon and found chemical contamination in the aquatic food webs. The study was recently published in the journal Environmental Toxicology and Chemistry.

The waters contained chemical compounds of mercury and selenium that can affect minnows, invertebrates and fish. The amount of chemicals present in the water would make the fish and fish-eating wildlife unsafe to eat.

However, rainbow trout had mercury levels that were below the EPA threshold, which means the most common kind of Colorado River fish are safe to eat. Researchers didn’t notice the usual deformities caused by mercury exposure in these animals, which could be because of a positive interaction between the mercury and selenium.

The Cause

Researchers believe that mercury was introduced to the Grand Canyon through pollution from a coal burning power plant in Page, Arizona.
Via: AZ Capitol Times

The Grand Canyon is in a remote part of Arizona, which makes data collection of distant areas difficult. The study cites potential sources of contamination from atmospheric deposition, watershed runoff, coal ash or irrigation returns.

There is a coal burning power plant located northeast of the Grand Canyon near Page, Arizona, which most likely contributed to the mercury contamination. Selenium probably exists naturally in the area, but upstream reservoir called Lake Powell could have contributed irrigation runoff from algae to the waterway.

“Our research adds to a growing body of evidence showing that remote ecosystems are vulnerable to long-range transport and subsequent bioaccumulation of contaminants,” according to the study. “Airborne transport and deposition is most commonly identified as the mechanism for contaminant introduction to remote ecosystems.”

Can The Contamination Be Contained?

Researchers believe that contamination in the Grand Canyon is going to continue to have a negative effect on the area’s wildlife and ecosystem.
Via: National Geographic

Environmentally conscious Americans have been advocating for the protection of historical natural sites, but the study shows that mercury concentrations are higher in comparison to other large rivers.

It is important to note that these chemicals are harmful to humans. Mercury contains a neurotoxin that affects the central nervous system. Selenium is a nutritional element, but an improper exposure to too much of the compound can cause teeth and hair to fall out, decreased alertness, lesions, skin discoloration and potentially liver tumors, according to the EPA.

The study says that mercury and selenium are “leading causes of impairment of lotic ecosystems.” Because the source of contaminated begins far beyond the borders of the Grand Canyon, it will be very difficult to contain.

“Protecting fish and wildlife in Grand Canyon from contaminant exposure driven by processes occurring beyond park and other political boundaries will remain an ongoing challenge,” according to the study.

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