algae

WTF Fun Fact 13728 – Three-Toed Sloths

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Three-toed sloths are nature’s slowest-moving mammals. Their slow pace is not just due to laziness but has evolved for survival. These fascinating creatures live in the tropical forests of Central and South America. Their lethargic lifestyle helps them conserve energy, crucial for their survival in their low-nutrient environment. Their slow metabolism means they do not have to eat a lot, as they can survive on leaves, buds, and fruits.

Their slow movement minimizes detection by predators like jaguars and harpy eagles. They only come down from the trees once a week to defecate. Their slow motion and excellent camouflage make them practically invisible to many forest predators. This trait is key to their survival despite their apparent vulnerability due to their speed.

Algae and the Sloth’s Ecosystem

A fascinating aspect of the three-toed sloth is its symbiotic relationship with algae. Because of the sloth’s slow movement and frequent inactivity, algae often grow on their fur. This algae creates a unique ecosystem on the sloth’s body, attracting other organisms like moths. These moths live and breed within the fur, contributing to this small ecosystem.

The algae provide a greenish hue, further camouflaging the sloth among the tree branches. This camouflage helps them blend in with their environment and avoid predators. The algae also serve as an emergency food source for the sloth, offering essential nutrients. This unique relationship is a prime example of nature’s interconnectedness and how different species can mutually benefit from each other.

How Three-Toed Sloths Adapt to Survive

Sloths have unique adaptations that enable their survival. They possess long claws that allow them to hang upside down from tree branches for extended periods. Their strong limbs make this hanging behavior possible without expending much energy. Their fur is dense and wiry, providing insulation and a base for the algae to grow. This algae camouflage adds an extra layer of protection against predators.

Their slow metabolism also plays a crucial role in their survival strategy. This reduced energy expenditure allows them to survive on their diet of leaves. However, the low energy levels limit their ability to move quickly. This slow movement contributes to the growth of algae on their fur, which then becomes part of their camouflage strategy.

Despite their slow speed, three-toed sloths have a remarkable survival strategy in their tropical habitats. They represent an exceptional example of how evolution has shaped creatures to adapt uniquely to their environments. Their relationship with algae and other microorganisms shows the intricate web of life and how creatures can benefit from unlikely partnerships.

—WTF fun facts

Source: “With a little help from my friends: sloth hair, moths and algae” — The Sloth Conservation Foundation

WTF Fun Facts 12706 – Oxygen From The Ocean

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It’s easy to think all our oxygen comes from trees on land – and a LOT of it does (especially rainforests, which there are lots of, and which need protection). But, in fact, most of it comes from the oceans.

That’s a bit harder to believe, but that doesn’t make it less true.

Plankton, specifically phytoplankton, produce most of the Earth’s oxygen. It also serves as food for sea creatures, but they don’t do much else that makes them interesting to most people. They just float around, completely at the mercy of the currents. They’re green and cruddy and you might even look at them and think “eww.”

And that’s fine since they also can’t be offended.

Here’s the deal: even though oceanic phytoplankton isn’t nearly as pretty as trees, it does similar work for us. These little organisms mostly float along the surface of the water or the upper part of the ocean where light still penetrates. They require sunlight to live and grow and produce food for other ocean creatures. They contain chlorophyll to capture the sunlight. If you remember back to grade school science, you probably see where this is going – photosynthesis.

Our oceanic phytoplankton turns the energy from sunlight, as well as carbon dioxide, and mineral salts partly into oxygen. There’s a lot of other stuff going on there too (other byproducts of photosynthesis, like the sugar they feed on), but oxygen is the byproduct we care about at the moment since we need it to breathe.

The cool thing is that even if you don’t live anywhere near an ocean, you still get the benefits because of the way the planet works. Oxygen is great because it just fills the atmosphere and doesn’t need to be shipped via trucks and planes to far-off destinations.

Scientists estimate that 50-80% of the oxygen production that takes place on Earth comes from the ocean. That’s a big range, but even if you go with the more conservative number, it’s clear that we can’t live without them. However, a lot of that oxygen also goes back into the ocean for other ocean life that needs it.

Don’t get us wrong, we love rainforests and regular trees too. But phytoplankton is doing more work than other flora when it comes to keeping breathing creatures alive.

We can do things like track plankton and get some readings off them, but it’s hard to know exact numbers of what they’re producing at any given time. The amount of oxygen they give off can change with the time of day or the time of year. It can also change depending on how healthy the oceans are.

One problem is that things like dead and decaying plants and animals in the ocean also consume oxygen when they decompose. That’s just one reason why killing off aquatic life (such as coral reefs) can be bad for us.

But if you remember one thing, it should be that these tiny, single-celled creatures do a lot of work for us by not only producing oxygen but by absorbing some of the CO2 we emit.

Some people call them “the lungs of the sea.” – WTF fun facts

Source: “How much oxygen comes from the ocean?” — National Oceanic and Atmospheric Administration