New User? Sign Up  |  Sign In  |  Help
“Logo
 

                 LogoLogo

Question
Answer
Discover
     
Search for questions :
My Profile

philosopher

Open Questions Bookmark and Share

Why isn't anything being done to stop our food supply from being posioned?

Microplastics
Pollutants at sea are almost as diverse as the species they endanger. According to a new study, even the ocean’s top predators, like grey seals, are at risk from microplastics. Researchers from the Plymouth Marine Laboratory (PML) have discovered that microplastics pose a threat to marine animals even when they did not directly ingest them.

As defined by the National Ocean Service of the U.S. National Oceanic and Atmospheric Administration, microplastics are pieces of plastic less than five millimeters long. These pollutants are known to be harmful to the aquatic life that inadvertently ingests them: from tiny feeders like zooplankton and other smaller fish all the way up to whales and sharks.

A new study published in the journal Environmental Pollution found that microplastics have also found their way to predators even higher up the food chain. The team of researchers, led by Sarah Nelms from PML’s Microplastics Research Group, analyzed the fecal matter of captive grey seals as well as the digestive tracts of wild-caught Atlantic mackerel the seals usually feed upon.

microplastic poisoning trophic transfer pollution marine life
Image credit: PML
Trophic Transfer
As it turns out, about half of the fecal samples and one-third of the mackerels contained microplastics. The seals, however, had not eaten the microplastics directly. Instead, they had entered their systems through a process known as trophic transfer. In fact, these findings provide the first evidence that trophic transfer, which was already known to occur between animals lower on the food chain, can also happen in larger predators.

“Our finding that microplastics can be passed from fish to marine top predators is something we’ve long thought was the case but, until now, lacked the evidence to back our theory up,” Nelms explained in a press release. “We have shown that trophic transfer is an indirect, yet potentially major, route of microplastic ingestion for these predators.”

Plastics are the most prevalent form of marine pollution. Over time, as they break down, they turn into microplastics. Other types of microplastics come from health and beauty products (things like facial cleansers and toothpaste) that find their way to the ocean by way of water filtration systems.



The way in which these pollutants have now been determined to transfer between creatures in the food chain is similar to how fish assimilate a dangerous type of mercury called methylmercury. One study found that methylmercury builds up in aquatic food chains in such a way that top predators become highly enriched, too. The more mercury the fish contain, the more dangerous it becomes for humans to consume. As it accumulates in the body, methylmercury becomes poisonous.

One question that has yet to be answered is, could the same be said of microplastics? “More work is needed to understand the extent to which microplastics are ingested by wild animals and what impacts they may have upon the animals and ecosystems,” said Penny Lindeque, lead PML microplastics researcher. Since more research is needed, and the study of the effects of microplastics on aquatic life is still an emerging field, it may be some time before we have an answer.

See link.
https://futurism.com/the-byte/poop-microplastics-stool-pollution

22 day(s) ago

    Comment(s) (0)
    Report
   Like  
   Email to Friends  
   Bookmark  
   Subscribe to Answer Alerts  
No comments yet !     Be the first to comment !
Answers (1)

Kravenhead
The short answer? Because of industry influence in politics.
For every two steps forward in pollution efforts, we take 1 1/2 steps back.
Industries fund campaigns and lobby politicians to loosen regulations, or eliminate them altogether, to improve their bottom line.
Then, politicians, not wanting to look bad in the eyes of voters, say it needs to be done for the economy's sake. In other words, they make it sound like their doing voters a favor, not corporations.
That's pretty much it in a nutshell.
Meanwhile, the planet gets trashed and our health is compromised.

I guess there's an even shorter answer.... Greed.

Posted 22 day(s) ago

( 1 )
( 0 )
    Comment(s) (0)
   Report
No comments yet ! Be the first to comment on this answer !

Edit your answer. Click save, when done.
Question Title Why isn't anything being done to stop our food supply from being posioned?
Your Answer
  |         |                            
bold  italic  underline  strike       big  small       superscript  subscript 
  Allows to add a link.
Caption :
Link URL :
( Must starts with "http://" )
Add  |   Cancel
  Allow to insert an image. Must be among the following file types - *.jpg, *.gif, *.png & *.bmp.
Image Url :   Upload New
( Image url must always starts with " http:// " )
Width : pixels
( Must not be greater than 450px. Enter 0px for no resize )
Add  |   Cancel
  Allow to insert YouTube video. Insert the video embed code.
Embed Code :
Add  |   Cancel
Character Count ( Max. - 5000 ) : 3428
  Your comment on this question
  |         |                            
bold  italic  underline  strike       big  small       superscript  subscript 
  Allows to add a link.
Caption :
Link URL :
( Must starts with "http://" )
Add  |   Cancel
  Allow to insert an image. Must be among the following file types - *.jpg, *.gif, *.png & *.bmp.
Image Url :   Upload New
( Image url must always starts with " http:// " )
Width : pixels
( Must not be greater than 450px. Enter 0px for no resize )
Add  |   Cancel
  Allow to insert YouTube video. Insert the video embed code.
Embed Code :
Add  |   Cancel
Max Allowed : 5000 Characters Current Count : 0
  Your comment on this answer
  |         |                            
bold  italic  underline  strike       big  small       superscript  subscript 
  Allows to add a link.
Caption :
Link URL :
( Must starts with "http://" )
Add  |   Cancel
  Allow to insert an image. Must be among the following file types - *.jpg, *.gif, *.png & *.bmp.
Image Url :   Upload New
( Image url must always starts with " http:// " )
Width : pixels
( Must not be greater than 450px. Enter 0px for no resize )
Add  |   Cancel
  Allow to insert YouTube video. Insert the video embed code.
Embed Code :
Add  |   Cancel
Max Allowed : 5000 Characters Current Count : 0
Email this question link to friends
You must enter an email-address, if a name is entered and vice-versa for each friend.
Friend #1 -
Friend #2 -
Friend #3 -
Friend #4 -
Friend #5 -
Enter Security Code : *

 

Copyright ©  All rights reserved.

Contact Us   Terms of Use