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coral reef

Conservation

Scientists left cinderblocks in a barren part of the sea. 3 months later they were ecstatic.

Coral reefs are dying at alarming rates. Concrete may be a creative solution.

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Scientists are turning simple concrete into the building blocks for a healthier ocean.

A viral video has been making the rounds lately that shows a giant (and extremely bizarre) ship opening up at its middle and dropping a metric buttload—that's the official term—of cinderblocks directly into the ocean. The video is fascinating, so much so that I was certain it was AI-generated at first. After all, what kind of ship can part down the middle like that?

Turns out, the video is real! The ship is called a split hopper barge and is often used to transport and deliver dredged soil. Dumping concrete like this looks like the world's worst case of littering, but in actuality, the concrete blocks serve an important purpose that benefits sea life of all varieties.

But how?

For answers, look no further than the GARP — that's the Grenada Artificial Reef Project (also known as the Grand Anse Artificial Reef Project or GAARP).

With coral reefs under threat and disappearing all over the world, the team behind the project came up with an interesting solution they wanted to test out.

In 2013, the scientists placed four concrete pyramids (basically, cinderblocks stacked together into something of a tower structure) in a barren part of the Caribbean Sea. The location was just off the coastal beaches of Grenada.

In just 3 months, the pyramids had attracted tons of marine life.

The block pyramids gave shelter to the animals who otherwise had nowhere to hide, nest, or feed in this part of the water. "An initial growth of algae and colourful encrusting sponge was soon followed by a varied range of invertebrates. These included feather duster worms, lobster, crab, and urchins. Excitement developed as we started to see a range of juvenile fish including squirrel fish, goat fish, grunts and scorpionfish," says the official website.

After a year, word must have spread among the fish, because the simple concrete blocks transformed into "buzzing diverse communit[ies] of marine life."

At around 18 months, things started to get really exciting. Stony and brain corals, described as the "building blocks of coral" began to appear on the pyramids.

Over the following 10 years, the project has exploded with more and more coral growing on the blocks and more fish and other sea life moving in. "Each subsequent year more pyramids have been added to increase biomass. GARP is becoming a balanced ecosystem, home to over 30 species of fish, 14 different kinds of corals and many of the invertebrates and algae you would find on a naturally occurring reef."

Today, there are upwards of 100 pyramid blocks in the location. Other, similar projects are taking place in waterways all over the globe.

- YouTube www.youtube.com

GARP/GAARP isn't the first or only project of its kind. Concrete has been shown again and again to make an excellent shelter for marine life and a perfect launching pad for new coral growth.

People have tried other materials before, to varied results. One such project off the coast of Florida in the 1970s utilized millions (!) of old tires in an effort to create new fish habitats. Called the Osborne Reef, the effort is now considered a major ecological disaster as storms and sea currents have tossed many of the tires around, washing them ashore and even damaging otherwise healthy natural reefs nearby. Talk about a backfire. Major clean up initiatives to undo the damage are still underway.

Specialized concrete structures are heavy enough to stay put in rough conditions and are one of the few things that can withstand years and years of being battered by rough, salty seawater without degrading.

Coral reefs are disappearing around the globe at an alarming rate. Physical damage, both natural and manmade, along with pollution, coral harvesting, global warming, and bleaching wreaks havoc on natural ecosystems under the sea.

Coral reefs aren't just there to look pretty. They dampen waves and currents before they hit land, reducing erosion and protecting people who live on the coast. Reefs are home to a huge variety of marine life who use it for shelter and finding food. And, finally, they're amazing destinations for scientific discovery—new species and even medical treatments are being discovered on reefs all the time!

All that and the very existence of coral reefs may be in jeopardy, according to the EPA.

There's no easy fix to this grave problem. Natural coral reefs take thousands of years to grow and mature. So, even with all the cinderblocks in the world acting as growth platforms, it would be impossible for us to replace all the coral we've already killed or destroyed. Saving our oceans must be a multi-faceted effort, with initiatives that combat pollution and rising sea temperatures in addition to creating artificial reefs.

But projects like GARP/GAARP are an awesome start. They may not save the planet all on their own, but if you ask me, those fish look pretty darn grateful for their new home.

Abalone Caye is a small island off the coast of Belize, and for about a week, it's home to an important group of kids.

The island, located in the middle of the Port Honduras Marine Reserve, is home to a small research station where five local college-age kids eat, work, and live together for a week each summer before heading back to the mainland.

There's a good reason for this expedition: These kids are in training to become community reef researchers.


Photo from TIDE, used with permission.

The Community Researcher Training Program is managed by James Foley and the Toledo Institute for Development and Environment (TIDE), an environmental institute in Belize. TIDE manages a large swath of natural areas in southern Belize, including the Port Honduras Marine Reserve. And the students, who all come from local communities, conduct research that's vital to helping us protect our coral reefs.

They learn how to do scientific research that'll help TIDE monitor and protect the reef, such as taking underwater fish counts, going out with fishermen to weigh their catches, or doing surveys of the local markets.

Foley also teaches them professional-level scuba diving as well as teamwork, which can be really important since the work means they may have to stay out on boats (or tiny islands) for hours or days at a time.

Photo from TIDE, used with permission.

Nice, right? But let's pause for a second and zoom out. Because big picture: Our reefs are in trouble, and they desperately need good management.

Coral reefs are an amazing ecosystem, but climate change is disrupting the little animals that make reefs, causing a potentially fatal problem known as coral bleaching. What's more, poor fishing practices means that reefs have been overfished, polluted, poisoned, trawled, and even blasted with dynamite.

Bleached coral in the Great Barrier Reef. Photo by Acropora/Wikimedia Commons.

Looking at all these problems caused by people, it's tempting to say, "OK, fine, we'll just close them off and keep everyone out." But that's neither realistic nor fair. Communities rely on these reefs for food and income, so managed access to the reefs is necessary in most areas around the world.

But managed access isn't just about limiting the number of fishermen — it's about studying and monitoring reef health and making policy changes as necessary, which is where the Community Researcher Training Program comes in. If we can head off problems like overfishing and pollution, we can help keep reefs healthy.

Foley's program has been successful because local communities don't always trust outsiders who come in and start telling people to change.

Often these communities have been living next to and with reefs for generations. They have deep cultural, historical, and economic ties to the reefs and their way of life.

So when a foreigner comes in – who hasn't lived there, whose family hasn't spent years fishing there – and starts ordering people around, it's understandable that locals would be mistrustful.

Foley has experienced this firsthand. He said that when he first arrived at TIDE, he'd try to talk to locals the conventional way, gathering locals into a room with graphs or discussions about trends and trying to tell them about changes they needed to make. But his words weren't always received well.

"People would be standing up, interrupting me, and saying 'You don't know what you're talking about. I've been fishing here all my life, and my father before me,'" Foley said.

And outsiders aren't always the best candidates for the job anyway.

Some research or management organizations rely on foreign volunteers, but doing that can come with drawbacks. You can't always count on volunteers having a lot of scientific training. Outsiders might also not understand the local environment or culture.

Even if the outsiders are highly trained professionals, it can still be a problem. Foley mentioned seeing otherwise good science derailed by a lack of local knowledge — some bit of information the scientist missed but that all the local fishermen knew by heart.

And at the end of the day, they don't live there. While a force of foreign volunteers might care deeply about the reef on an emotional or intellectual level, they don't live with it or depend on it for their livelihoods like the locals do.

That's why putting scientific power in the hands of these local kids is an awesome idea.

Photo from TIDE, used with permission.

In fact, many of the same fishermen who were initially distrustful of the program are now on board.

"We've actually had now fishermen standing up in meetings and saying, 'Five years ago, you telling me this, I wouldn't have believed it. But now my own daughter's collecting the data,'" Foley said.

Some of the students in the program are on an academic track already, but others are children of local fishing families and "second-chancers" — kids who've been in trouble with the law or dropped out of school and need another opportunity to succeed.

Foley's been doing this since 2011, and he says the entire program is a win-win. Even if the students don't end up as researchers themselves, they end up with a highly desirable skill set; some have since become tour guides, members of the coast guard, or even TV presenters. And they can still sometimes be called in to help from time to time, too.

This isn't just feel-good fluff, either: Good community management might be the key to saving reefs.

In July 2016, the academic journal Nature published a worldwide survey of coral reefs. The most interesting things they found were called "bright spots," places where reefs were doing substantially better than anyone expected.

A healthy reef can support a gigantic network of different plants and animals. Photo from joakant/Pixabay.

The bright spots weren't just remote, humanless areas either. Some were located right next to huge human populations and fished heavily. So what was the link between the bright spots? Where there were bright spots, local communities were actively involved in monitoring and protecting the reef.

Programs like these may end up being the heart of future reef conservation.

"It's really all about empowering local communities to participate in the management of their natural resources and building trust between the communities," said Foley.

So in the future, if you go diving and find yourself surrounded by magnificent schools of fish, sea turtles, blooms of color, and all the other signs of a healthy coral reef, you might want to remember and thank these community researchers.

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The Wilderness Society

Australia's Great Barrier Reef is one spectacular (and sometimes scary, but always beautiful) place.

1. This, ladies and gentlemen, is a lion fish. Gorgeous, but dangerous. All images via iStock.


I mean, just look at it...

2. Don't you want to jump right in?

It's unlike any other reef in the world.

3. Beneath the surface of that water is a whole lot of life.

Why? Well, for starters, it's enormous.

4. Now that's a view.

It covers over 1,400 miles (that's more than the distance from New York City to Miami, FYI), and is the only living thing visible from space.

The Great Barrier Reef — the largest coral reef on Earth — actually comprises more than 3,000 smaller reef systems and hundreds of islands.

5. Check out the Whitsunday Islands. They're beautiful!

It has World Heritage status and definitely deserves it.

World Heritage status is the United Nations' way of deeming a certain place or human creation as having significant cultural or physical value to humanity. National Geographic perfectly explains why the reef has been designated as such:

"The most riveting sight of all — and the main reason for World Heritage status — is the vast expanse of coral, from staghorn stalks and wave-smoothed plates to mitt-shaped boulders draped with nubby brown corals as leathery as saddles. Soft corals top hard ones, algae and sponges paint the rocks, and every crevice is a creature's home. The biology, like the reef, transforms from the north — where the reef began — to the south. The shifting menagerie is unmatched in the world."

6. Look at these yellow and white beauties.

The Great Barrier Reef is more than just beautiful, though — it's home to an absurd amount of unique species.

Like puffer fish.

7. Puffer fish are amazing ... but definitely don't eat one.

And clown fish.

8. Yes, like Nemo!

Giant potato cod also call these waters home.

9. This big fella can change colors depending on its surroundings.

As well as parrot fish.

10. Colorful, huh?

And lion fish.

11. Remember this beautiful specimen from photo #1?

You might spot a jellyfish floating around Down Under, too.

12. If you don't know how to stay safe from jellyfish, you should.

Or, if you're lucky, one of these things! A marine turtle.

13. These are just the coolest.

Don't forget about octopus, either.

14. These species are way cool ... especially the mimic octopus.

Or trigger fish, which aren't shaped this way by accident.

15. Trigger fish are long and slim — perfect for slithering into coral crevices.

I could go on and on — seriously, there are over 1,800 species of fish alone in the Great Barrier Reef — but you get my drift.

These creatures (and so many others) are incredibly important to ocean wildlife.

And that's why it's essential that their home stays protected.

16. Why would we ever want to destroy a place that looks like this?

We need to take action in big ways — like get serious in our fight against climate change (which is already affecting many of the reef's species) and protect the coral and its inhabitants from those of us humans who enjoy fishing and collecting (even if it's at the expense of an entire ecosystem).

If we want to, we can keep the ocean life off Australia's coasts thriving for generations to come.

That's why you should support the Wilderness Society, who are fighting Big Oil in Australia.

The group is demanding that BP stays out of the Great Australian Bight — another pristine marine region Down Under. Fun fact: More than 85% of the species in the shallows of the Bight can be found nowhere else on Earth!.

To support the Wilderness Society, sign their petition to keep BP out of the Bight for good.

17. I'm fairly certain Nemo and his friends would appreciate us protecting their home.