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Sea anemones are ingesting plastic microfibers

Tiny fragments of plastic in the ocean are consumed by sea anemones along with their food

Date:
March 28, 2019
Source:
Carnegie Institution for Science
Summary:
Tiny fragments of plastic in the ocean are consumed by sea anemones along with their food, and bleached anemones retain these microfibers longer than healthy ones, according to new research. The work is the first-ever investigation of the interactions between plastic microfibers and sea anemones, which are closely related to corals.
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Tiny fragments of plastic in the ocean are consumed by sea anemones along with their food, and bleached anemones retain these microfibers longer than healthy ones, according to new research from Carnegie's Manoela Romanó de Orte, Sophie Clowez, and Ken Caldeira.

Their work, published byEnvironmental Pollution, is the first-ever investigation of the interactions between plastic microfibers and sea anemones. Anemones are closely related to corals and can help scientists understand how coral reef ecosystems are affected by millions of tons of plastic contaminating the world's oceans.

One of the most-common types of plastics in the ocean are microfibers from washing synthetic clothing and from the breakdown of maritime equipment such as ropes and nets. Microfibers are found across all the world's oceans and are beginning to appear in fish and shellfish consumed by humans.

"Plastic pollution is a serious and growing problem for our oceans and the animals that live in them," Romanó de Orte said. "We wanted to understand how these long-lived contaminants are affecting fragile coral reef ecosystems. Plastics could be confused by the organisms for food and could also be carriers of other harmful contaminants. Since sea anemones are closely related to corals, we decided to study sea anemones in the laboratory to better understand effects of plastics on corals in the wild."

Most laboratory research on plastic pollution uses tiny beads of plastic, not microfibers. So Romanó de Orte, Clowez, and Caldeira set out to determine whether microfibers are ingested by healthy sea anemones and by those that have lost the symbiotic algae that provide them with nutrients, a condition called bleaching. On corals reefs, bleaching is caused by increasing ocean temperatures due to global climate change.

The research team introduced three different kinds of microfibers -- nylon, polyester, and polypropylene -- to both unbleached and bleached sea anemones both alone and mixed with brine shrimp.

They found that when introduced alone, nylon was consumed by about a quarter of the unbleached anemones and the other two microfibers were not taken up at all. But when the microfibers were mixed with brine shrimp, about 80 percent of the unbleached anemones ingested all three microfibers. For the bleached anemones, 60 percent consumed nylon and 20 percent consumed polyester with no food present, and 80 percent took up all three microfibers when mixed with brine shrimp.

花了更长的时间漂白海葵驱逐the microfibers after ingesting them than it did for the healthy anemones, although all microfibers were gone by the third day. However, in a natural marine environment, anemones and coral would continually be reintroduced to new microfibers, making the contamination a chronic condition of their existence.

"Our work suggests that plastic pollution and climate change are packing a one-two punch for coral reefs," Caldeira explained. "When the reefs are bleached by hot ocean temperatures, the organisms are more likely to eat and retain plastic microfibers. It looks like the effects of global warming and of ocean pollution don't just add together, they multiply."

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Materialsprovided byCarnegie Institution for Science.注意:内容可能被编辑风格d length.


Journal Reference:

  1. Manoela Romanó de Orte, Sophie Clowez, Ken Caldeira.Response of bleached and symbiotic sea anemones to plastic microfiber exposure.Environmental Pollution, 2019; DOI:10.1016/j.envpol.2019.02.100

Cite This Page:

Carnegie Institution for Science. "Sea anemones are ingesting plastic microfibers: Tiny fragments of plastic in the ocean are consumed by sea anemones along with their food." ScienceDaily. ScienceDaily, 28 March 2019. .
Carnegie Institution for Science. (2019, March 28). Sea anemones are ingesting plastic microfibers: Tiny fragments of plastic in the ocean are consumed by sea anemones along with their food.ScienceDaily. Retrieved July 20, 2023 from www.koonmotors.com/releases/2019/03/190328112522.htm
Carnegie Institution for Science. "Sea anemones are ingesting plastic microfibers: Tiny fragments of plastic in the ocean are consumed by sea anemones along with their food." ScienceDaily. www.koonmotors.com/releases/2019/03/190328112522.htm (accessed July 20, 2023).

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