“Imagine What It Would Look Like If ChatGPT Were A Lossless Algorithm. If That Were The Case, It Would

What are Phytoplankton and Why Are They Important?

Breathe deep… and thank phytoplankton.

Why? Like plants on land, these microscopic creatures capture energy from the sun and carbon from the atmosphere to produce oxygen.

Phytoplankton are microscopic organisms that live in watery environments, both salty and fresh. Though tiny, these creatures are the foundation of the aquatic food chain. They not only sustain healthy aquatic ecosystems, they also provide important clues on climate change.

Let’s explore what these creatures are and why they are important for NASA research.

Phytoplankton are diverse

Phytoplankton are an extremely diversified group of organisms, varying from photosynthesizing bacteria, e.g. cyanobacteria, to diatoms, to chalk-coated coccolithophores. Studying this incredibly diverse group is key to understanding the health - and future - of our ocean and life on earth.

Their growth depends on the availability of carbon dioxide, sunlight and nutrients. Like land plants, these creatures require nutrients such as nitrate, phosphate, silicate, and calcium at various levels. When conditions are right, populations can grow explosively, a phenomenon known as a bloom.

Phytoplankton blooms in the South Pacific Ocean with sediment re-suspended from the ocean floor by waves and tides along much of the New Zealand coastline.

Phytoplankton are Foundational

Phytoplankton are the foundation of the aquatic food web, feeding everything from microscopic, animal-like zooplankton to multi-ton whales. Certain species of phytoplankton produce powerful biotoxins that can kill marine life and people who eat contaminated seafood.

Phytoplankton are Part of the Carbon Cycle

Phytoplankton play an important part in the flow of carbon dioxide from the atmosphere into the ocean. Carbon dioxide is consumed during photosynthesis, with carbon being incorporated in the phytoplankton, and as phytoplankton sink a portion of that carbon makes its way into the deep ocean (far away from the atmosphere).

Changes in the growth of phytoplankton may affect atmospheric carbon dioxide concentrations, which impact climate and global surface temperatures. NASA field campaigns like EXPORTS are helping to understand the ocean's impact in terms of storing carbon dioxide.

Phytoplankton are Key to Understanding a Changing Ocean

NASA studies phytoplankton in different ways with satellites, instruments, and ships. Upcoming missions like Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) - set to launch Jan. 2024 - will reveal interactions between the ocean and atmosphere. This includes how they exchange carbon dioxide and how atmospheric aerosols might fuel phytoplankton growth in the ocean.

Information collected by PACE, especially about changes in plankton populations, will be available to researchers all over the world. See how this data will be used.

The Ocean Color Instrument (OCI) is integrated onto the PACE spacecraft in the cleanroom at Goddard Space Flight Center. Credit: NASA

Light photons, which make up the world around us, were observed inside a vacuum. Their natural locations were completely random.

Human DNA was then inserted into the vacuum. Shockingly the photons were no longer acting random. They precisely followed the geometry of the DNA.

BREAKING NEWS

I just learned about a bird species called Golden Plover. Their chicks have an amazing camouflage: their baby fluff resembles MOSS!

LOOK AT THEM! JUST LOOK AT THEM!

...Oh to be a tiny golden plover lying in the moss safe and sound waiting for your mom to bring you some worms...

Feels like summer 23.07.2024.

Mouse brain labeled using the brainbow technique. Brainbow is a technique used to distinguish individual neurons using different-colored derivatives of GFP (green fluorescent protein). By Dr. Tamily Weissman-Unni.

nothing is as tender as annotating your favourite books. it’s like leaving a piece of your heart on the pages for somebody else to find.

Meditations by Marcus Aurelius

Hello! Why did penguins evolve to have black feathers if they live in icy (mostly white?) locations? I understand them having a white tummy because when swimming they could be more difficult to identify by a predator swimming below them? Thanks!

Love your blog!

Hello! So, here's what I learned at uni:

the widely-accepted reason penguins have black feathers is the same reason they have white tummies, but backwards. When swimming, they are more difficult to identify by a predator swimming above them! You can see similar countershading in sharks and dolphins, and also on land animals like mountain goats and lizards. Overall, it helps to make animals less obvious when viewing from the side, because it reduces the obviousness of their shadow.

As to why penguins have black feathers in icy, mostly white, locations (on LAND), you need to consider why it would be good to be white in an icy, white location in the first place!

Mostly, it would provide camouflage, which would protect from land predators! However, penguins don't really have any significant land predators in Antarctica. There are no polar bears, or big snakes, or even foxes or coyotes in Antarctica, so the penguin won't benefit from being camouflaged on land. Basically, there's no "selective pressure" for them to be all white!

some penguin chicks, however, do have to worry about a few predators, so they have a little more camouflage than the adult penguins:

What's more, there are likely advantages to black feathers in a cold environment like Antarctica! For example, in the sun, dark feathers absorb more thermal energy, helping to warm the penguin and maintain their body heat.

There may also be some stuff with black feathers being more resistant to wear/ friction drag in the water, but that's entering the realm of ongoing research, which I won't get into here.

Let me know if there's anything that needs clarifying!

(some citations if anyone wants further reading:)

Bonser, R. H. (1995). Melanin and the abrasion resistance of feathers. The Condor, 97(2), 590-591.

Ksepka, D. T. (2016). The penguin's palette--more than black and white: this stereotypically tuxedo-clad bird shows that evolution certainly can accessorize. American Scientist, 104(1), 36-44.

Rowland, H. M. (2009). From Abbott Thayer to the present day: what have we learned about the function of countershading?. Philosophical Transactions of the Royal Society B: Biological Sciences, 364(1516), 519-527.

Zagrai, A., & Hassanalian, M. (2020, July). Penguin coloration affects skin friction drag. In 2020 Gulf Southwest Section Conference.

The books I'm reading at the moment.

Meditations by Marcus Aurelius - I love this book. It puts you in the perspective of the time and space you occupy, I found a lot of my own thinking and feelings within the pages of this book. A guy born in AD 121 has very clear view on life that is still relevant today.

Great Adaptations by Kenneth Catania - A professor of biological sciences takes you on a journey with him while he studies various animals adaptive abilities. Star nosed moles, electric eels, tentacled snakes... Very interesting insight in how these creatures evolved and adapted.

What we cannot know by Marcus du Sautoy - Explains concepts from the ground up, I like the illustrations that accompany the text and practical examples. Lays foundations to the known and wonders into the future of research and the possibilities that come with it as well as limitations. Covering themes from quantum physics and cosmology to sensory perception and neuroscience.

Labyrinths of reason by William Poundstone - "Blue sky, sunshine, deja vu glazed with dread." How do you know this isn't all a dream? Is anything certain? Ontology, logic, mathematics, deduction, epistemology, memory formation, paradoxes and puzzles.

A brain for numbers by Andreas Nieder - Humans' understanding of numbers is intuitive. How are infants able to perceive numbers even before they learn the words for them? How do our brains process numbers? Can animals count? He shows how it is an adaptive ability and that plenty of animals have the number sense too. There is a variety of research and supporting evidence mentioned which I really like.