At first glance, the tumbled rocks at the edge of the ocean cove where I once lived look lifeless-too rugged a place for animals to make their home. But explore these boulders, and you'll meet a fascinating community of creatures that survive in the harsh intertidal zone.
The intertidal zone lies along the ocean's edge. In this unique habitat, the water level changes with the Moon-driven tides. At high tide, seawater covers shoreline that might be several feet, or a few meters, above water at low tide.
Catalina Island's Intertidal Zone
On Catalina Island, 20 miles (32 km) off the coast of Southern California, much of the intertidal habitat is rocky and rough. I worked as a teacher at Catalina Island Marine Institute, an outdoor marine science school that students from fourth grade to twelfth grade visit to learn about the ocean. I loved taking my classes to investigate our constantly changing intertidal zone.
Let's explore this wondrous environment between the tides!
First, listen to the constant rhythm of the intertidal world: a whoosh as blue-green water pours into cracks around the rocks, a gargle as the frothy water is sucked back out.
If we watched one patch of intertidal rock all day, we'd see water swirl over it at high tide, the Sun bake it at low tide, and waves pound on it in between. In California and most places on Earth, there are two high tides and two low tides each lunar day. (A lunar day is the time it takes the Moon to orbit Earth, which is about 24 hours and 50 minutes.)
It's almost low tide now, the perfect time to find intertidal creatures out of the water. Let's go-be careful on the slippery rocks!
Intertidal Creatures
Denne historien er fra July/August 2022-utgaven av Muse Science Magazine for Kids.
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Denne historien er fra July/August 2022-utgaven av Muse Science Magazine for Kids.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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Who's Your Cousin?
The great apes are among the most popular animals in most zoos. Their actions, facial expressions, and family life remind us so much of ourselves. Have you ever wondered, though, how we might look to them?
Is it possible to die of boredom?
To figure out if we can die of boredom, we first have to understand what boredom is. For help, we called James Danckert, a psychologist who studies boredom at the University of Waterloo in Canada.
THE PROBLEM WITH PALM OIL
Palm oil is all around you. It’s in sugary snacks like cookies and candy bars. It’s in lipstick and shampoo and pet food.
SERGE WICH
Serge Wich’s favorite days at work are spent out in the forest, studying orangutans in Sumatra and Borneo or chimpanzees in Tanzania.
ELODIE FREYMANN
When you’re feeling sick, it probably doesn’t occur to you to try eating tree bark.
Guardians of the Forest
EARLY, MAKESHIFT WILDLIFE DRONES HELPED TO DETECT AND PROTECT ORANGUTANS.
APE ANTICS
The Whirling World of primate play
Dr. Ape Will See You Now
HUMANS AREN’T THE ONLY PRIMATES THAT USE MEDICATION.
THE LEFT OVERS
A lot has happened for modern humans to get to this point. We lost most of our hair, learned how to make tools, established civilizations, sent a person to the Moon, and invented artificial intelligence. Whew! With all of these changes, our bodies have changed, too. It’s only taken us about six million years.
SO, WHAT IS A PRIMATE?
What do you have in common with the aye-aye, sifaka, siamang, and potto? If you said your collarbone, you re probably a primatologist—a person who studies primates. If you’re not, read on.
