microplastics

Where does plastic go once it enters the ocean? This is a harder question to answer than it may seem. When we think of plastic pollution, most of us think of large pieces of plastic floating at the surface of the ocean, but that’s only a piece of the puzzle. Plastic can be found at every depth in the ocean. Some of that plastic does float, but some drifts underwater, and some sinks all the way down to the ocean floor. It is especially hard to keep track of the smallest pieces of plastic, microplastics less than 5mm in size. Recent research is revealing that those microplastics are being moved not just by currents and weather, but by animals through their digestive tracts.

Happy World Ocean Day! Today is a day to stop and think about our ocean, how it helps us (so many ways!), and what we can do to make sure it stays healthy. This year’s theme is plastic pollution. Unfortunately, our ocean faces many threats, one of which is marine debris. Marine debris is a major issue that impacts our ocean and consequently, impacts us.

Learn more about plastic pollution– the most prevalent form of marine debris– and how we can work together to keep our ocean plastic-free.

By: Demi Fox, Northeast Regional Coordinator for the NOAA Marine Debris Program

We’re spending March talking all about marine debris and its types, sources, impacts, and solutions. Tune in throughout the month to learn more about this important topic and how we can all be part of the effort to make our lives and our ocean #DebrisFree.

Marine debris is a serious threat to marine animals. While large pieces of litter can have dramatic impacts on marine animals, less obvious are the dangers of plastics measuring less than five millimeters in size, known as “microplastics.” These small pieces of debris have quickly become a high research priority for scientists around the world. Microplastics enter the marine environment from a variety of sources: microbeads in cosmetics, microfibers washed from our clothing, and plastic fragments degraded by the sun, among many others. The threats they pose depend on their quantity, chemical composition, location in the ocean and the water column, and availability for ingestion. Despite its small size, microplastic debris is affecting some of the planet’s largest animals.

By: Chelsea M. Rochman, Guest Blogger and Assistant Professor in the Dept. of Ecology and Evolutionary Biology at the University of Toronto

The microplastics literature is growing at a tremendous rate. Every day, new studies are published about their sources, fate, and effects. There is no longer any doubt that microplastics of all shapes, sizes, and types contaminate diverse ocean habitats and animals. We also understand much more about the effects of microplastics on organisms than we did just a few years ago. Still, there are research gaps to fill. As part of a project funded by the NOAA Marine Debris Program, we set out to answer questions related to these research gaps. We examined whether environmentally-relevant concentrations of different types of microplastics directly affect freshwater prey and indirectly affect their predators. Check out the results which were just published.

By: Dr. Stefanie Whitmire, Guest Blogger and Research Scientist at the Baruch Institute of Coastal Ecology & Forest Science, Clemson University

Microplastics are plastic pieces measuring less than five millimeters in size and in recent decades, there have been many studies that indicate a strong presence of this type of debris in marine and coastal environments. Microplastics can come from a variety of sources. Some microplastics are manufactured at that small size as microbeads, found in products like toothpaste and facial scrubs, or pellets, which are used to make larger plastic items. Microfibers, another type of microplastic debris, come from synthetic items such as rope or clothing (like fleece). Microplastics also come from the breakdown of larger plastic pieces, such as water bottles and fishing line. To investigate the number and distribution of microplastics on National Park beaches across the Unites States, researchers at Clemson University collaborated with the National Park Service to collect and analyze sand from 37 coastal National Parks.

By: Matthew Coomer, Intern with the NOAA Marine Debris Program

You may not think about wastewater treatment plants (WWTPs) very often, but you use them every day. In fact, they are essential to protecting our health and the environment; WWTPs change our sewage into clean water that can safely re-enter rivers and the ocean. These facilities are complex, but to simplify, they filter solid material out of wastewater, allow microorganisms to feed on the organic matter that’s left behind, and then kill any dangerous bacteria. Whenever you use water at home or in your community, you use your local WWTP. Unfortunately, while these treatment plants are very good at their job, they may also be point sources of a persistent type of marine debris— microplastics.

Microplastics are a type of plastic marine debris that are less than five millimeters in size. Research on this type of debris has become more widespread, but since there is no single agreed-upon method for separating, counting, and weighing microplastics in water samples, it is difficult to compare results across studies. Common approaches may be used, but most laboratories develop their own procedures based on factors such as budget, equipment availability, labor, and the specific research questions being asked.

Since so many different protocols are being used, the NOAA Marine Debris Program partnered with researchers at the University of Washington Tacoma to compare different methodologies.