plankton biology

bbc.com
Video captures moment plastic enters food chain - BBC News
A video captures the moment plankton ingest a plastic microfibre.

A scientist has filmed the moment plastic microfibre is ingested by plankton, illustrating how the material is affecting life beneath the waves.

The footage shows one way that waste plastic could be entering the marine and global food chain.

An estimated 150 million tonnes of plastic “disappears” from the world’s waste stream each year.

Waste plastic in the world’s seas has been recognised by the United Nations as a major environmental problem.

“When I saw it, I thought that here was something, visually, to convey to the public the problem of plastic in the sea,” said Richard Kirby, who recorded the footage.

“What intrigues me is that because the fibre has made a loop inside the animal’s gut, you can actually see the consequences of something as small as the arrow worm consuming microplastic.”

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From Drifter to Dynamo: The Story of Plankton

Most plankton are tiny drifters, wandering in a vast ocean. But where wind and currents converge they become part of a grander story… an explosion of vitality that affects all life on Earth, including our own. Watch the latest “Deep Look” video from KQED and pbsdigitalstudios:

http://youtu.be/jUvJ5ANH86I

Microscope Monday: Dinoflagellates Unite

How many creatures do you see moving through the water? If at first glance it looks like just one, don’t be deceived. This dinoflagellate, called Polykrikos hartmanii, forms “pseudocolonies,” in which several individual organisms (called zooids) are joined together, hunting for other dinoflagellates to feed on. A single pseudocolony can contain anywhere from 4 to 16 individuals. It’s thought that these pseudocolonies form because of incomplete cell division: Another nucleus forms, but the new cell doesn’t break off. (Video: Tim Mullady)

  • What I say: I'm fine!
  • What I mean: Am I the only one who's ever bothered by what Plankton from Spongebob is actually supposed to be? Like, everyone else in this universe is determined at least down to the family, but Plankton is the only one whose name is only a paraphyletic taxon. I mean, even Mr. Krabs, who's said to be a hybrid of a crab and a prawn (I think) at least remains in the class of crustaceans. And Plankton's colour furthermore implies that he's phytoplankton, which would make him the only non-animalistic character to show consciousness, the only plant that talks and thinks. Also has it never struck him that he is capable of asexual reproduction and despite having a whale's dad for a nemesis, he is never threatened by the food chain at all? If he wanted the secret formula so badly, he could've easily created tons of replicas of himself and thrown over all of Bikini Bottom and more. Like, I know it's a cartoon where the protagonist makes a fire underwater, but for Christ"s sake! Stephen Hillenburg is a marine biologist, what was he thinking?!
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Still wondering how plankton swims?

The open sea is a pelagic ecosystem (Pelagic is a term that refers to a part of the sea or ocean, that is not near the shore nor near the bottom), in wich the living components are plankton an nekton.

Plankton (singular plankter) are a diverse group organisms that includes microalgaes (phytoplankton) -both first gif- and animals (zooplankton) that float along at the mercy of the sea’s tides and currents.

Several structural features and behaviors have evolved to keep afloat organism that are not strong swimmers. some plankton species display a number of interesting adaptation that help them avoid predation. Many planton and nekton swim by cilia, flagella, appendages and undulatory tails

Some are babies (correct term is larva) that will grow into strong-swimming, non-planktonic adults. Others will remain plankton for their entire lives, also jellyfish. Most of the plankton in the ocean are micro-algaes, It is estimated that 80% of the oxygen on earth is produced by phytoplankton.

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One more Plankton Panel. From top to bottom:

1. Freshwater Phytoplankton, mainly Diatoms and Dinoflagellates / from Lake Chuzenji, Nikko, Tochigi Pref., Japan / Microscope:Leica DMRD (DIC)  (CC BY-SA 2.5)

2. Assorted diatoms as seen through a microscope. These specimens were living between crystals of annual sea ice in McMurdo Sound, Antarctica. Image digitized from original 35mm Ektachrome slide. These tiny phytoplankton are encased within a silicate cell wall. (Public Domain - NOAA)

3.  Phytoplankton - the foundation of the oceanic food chain. (Public Domain - NOAA)

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Caused by the bio luminescence of phytoplankton, this natural phenomenon occurs when a particular species becomes stressed. It is thought to be used as a defense mechanism, with the phytoplankton spraying glowing goo at potential predators.

Tourists flock to this specific area of the Maldives to see the ocean light up like the stars.

- Konner

(Images and information from The Independent)

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Plankton poop could be spreading plastic waste across the oceans

Researchers at the University of Exeter and Plymouth Marine Laboratory concluded that the organisms, known as zooplankton commonly ingest tiny plastic particles, which inevitably makes their way to their feces, reported Phys.org. The tiny organisms, among the most abundant things in Earth’s oceans, are part of the building blocks of life, and any human-caused disruptions to their diet have scientists concerned.

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