Five Films, a UK based film company invested in sharing the stories of our Earth and biology filmed for the first time in recorded scientific history the event of zooplankton eating plastics. Although a seemingly mundane discovery, this evidence of microorganisms filling their tiny little bellies with plastics provides more backing to the claim that plastics are affecting our marine life in a fundamental way. So in order to eat, the little plankton guy stirs up all the water surrounding him in a frenzy of limbs and eats up all the foodstuffs he draws into his mouth from the water. In this case, the foodstuffs being plastics. As observed in the video, the plastics are the florescent green beads in the water, and you can see the plankton eating and having the plastics in their bodies. Now, from our research in class, and basic knowledge of the plastics that exist in the oceans, it is not too surprising to find out that the plankton are eating the micro pieces of plastics which makeup the majority of plastic pollution in the ocean. The significance of this video is the amount and concentration of plastics eaten by the plankton, and how this affects the biology of our oceans. It is almost impossible/very very hard to know the correction concentrations of plastics in the ocean because we as individuals/ scholars, and the scientific community do not exactly how big our ocean is. So its very hard to calculate how the presence of plastics and the organisms who eat them when we can’t accurately measure the body in which they live in. But when we can know is that these feeding habit it altering our ocean ecosystem in ways we don’t entirely understand yet. Plastics are unnatural substances, and so when something like, i don’t know, a plankton per-say eats it, their insides get a little funky. So if we follow the food chain oceanic game of “The Little Old Lady Who Swallowed a Fly” it would look as follows: the plankton ate the plastic, and the crab ate the plankton, and the fish ate the crab, and then the person ate the fish. Why did the plankton eat the plastic? It’s not that we don’t know why, it is because there is so much of it in a micro sense in the ocean that zooplankton inevitably ingest it while eating. Now this is a problem for all of us for a number of reasons, the main points being that a) our ecosystems are changed because of the presence of plastics, and b) we ourselves could be harmed by eating/ having the presence of plastics in out marine life, big and small. Relating back to our research, this video helps visual the statistics of plastics being gathered in the ocean, and the affects it has on our ocean life. Also, look at the plankton, it’s pretty cool to watch them eat.
This is a great video that you found Ana. In addition to the evidence of plastic ingestion, I particularly like it for it’s illustration of life in a low Reynolds number world. Note how quickly the motion of the particles stop when the zooplankton stops moving it’s appendages (between the 7 s and 12 s marks in the video). Perhaps this is a topic for another day.
I was curious about the statement that we don’t have a good idea about the size of the oceans. Where did you get that impression? I think we have a pretty good idea how much volume there is in the oceans. However, it is true that we don’t know how much plastic is in there because it’s so hard to measure.