Robotic technology is being developed to help rid the reefs of invasive species–the crown of thorns starfish on our side of the world and the lionfish in the Atlantic and Caribbean.
Robot designed to kill the invasive crown of thorns
From Scientific American:
The Great Barrier Reef will have a robotic protector beginning this winter. The underwater autonomous vehicle is programmed to patrol the massive living structure in search of destructive crown-of-thorns starfish (COTS), which it then kills by lethal injection. These starfish prey on coral polyps, and although they are native to the reef, their population has exploded in the past few years, possibly because of overfishing of their natural predators. Click here to read the full story.
Our friends in the Atlantic and Caribbean also have a serious problem with the invasive lionfish. Another robot has been proposed to help with this predator.
Prototype of the lionfish killer robot
From Live Science:
The robotics company iRobot, known for creating the autonomous and endearing Roomba vacuums, is taking steps to make a clean sweep of lionfish in the coastal waters of the Atlantic Ocean, with a robot designed to target and dispatch the invasive fish. Click here to read the full article
An industrious Balinese high schooler started a business selling bamboo straws
I ran across a couple of articles today about straws that I thought I would share. First, from National Geographic: “Straw Wars: The Fight to Rid the Oceans of Discarded Plastic.”
The second one, from our own backyard here in Bali, made me smile and gives me hope: “Putu’s Bamboo Straws.”
Do your part–say ‘No Thanks’ to plastic straws.
Ways to Protect Coral Reefs
Click here to read full article
On the left is normal coral; on the right is bleached coral after exposure to sunscreen
I see divers and snorkelers slathering on sunscreen every time I go out on the Sea Rovers’ boats. Since there are only a limited number of dive sites at Menjangan and here in Pemuteran, it really worries me about the impact these chemicals may be having on the reefs. Here are some excerpts from an article from National Geographic and PADI. Click on the links if you want to read them in full.
The sunscreen that you dutifully slather on before a swim on the beach may be protecting your body—but a new study finds that the chemicals are also killing coral reefs worldwide.
Four commonly found sunscreen ingredients can awaken dormant viruses in the symbiotic algae called zooxanthellae that live inside reef-building coral species. Even low levels of sunscreen, at or below the typical amount used by swimmers, could activate the algae viruses and completely bleach coral in just four days, the results showed.
The researchers estimate that 4,000 to 6,000 metric tons of sunscreen wash off swimmers annually in oceans worldwide, and that up to 10 percent of coral reefs are threatened by sunscreen-induced bleaching.
So what’s a diver (or snorkeler) to do?
When it comes to sunscreen, any natural product (organic, biodegradeable etc) is better for the environment then the conventional one. Look for a brand that uses physical sunblocks such as titanium dioxide and zinc oxide instead of chemical ones.
Read the label. A product advertising itself as “reef safe” doesn’t necessarily mean what it says. Always look at ingredient lists to make sure reef-damaging substances (such as oxybenzone, butylparaben, octinoxate and 4-methylbenzylidine camphor, all of which have been shown to cause coral bleaching even at low levels) aren’t included.
Apply sunscreen at least 10-15 minutes before going in the water so that the lotion absorbs into your skin.
Now that you’re ready to make the switch to coral reef safe sunscreen (and human-safe), consider the 10 options below, all of which have a “1” rating from the EWG, and positive reviews from online consumers. The products below are not officially endorsed by PADI or Project AWARE; however, if you are reading this article in the United States and make a purchase by clicking a link below, a portion of your purchase will go to Project AWARE via the Amazon Associates program.
- Aubrey Organics Natural Sun Sunscreen, Sensitive Skin/Children, SPF 30+
- Badger Sunscreen Cream, Unscented, SPF 30
- UV Natural Sport Lip Sunscreen, SPF 30+
- Badger Broad Spectrum Sport Facestick, SPF 35
- ECO logical All Natural Sunscreen, SPF 30+
- Elemental Herbs Sport Sunscreen, SPF 30+
- Green Screen D Organic Sunscreen, Original, SPF 35
- BurnOut Ocean Tested Physical Sunscreen, SPF 30
- Raw Elements USA Eco FormulaSPF 30
- All Terrain KidSport SPF30*
I wear a thin wetsuit or dive skin whenever I’m on the boat (I do have a noticeable tan line that starts at my wrists; I could wear my gloves if it becomes too unsightly). I try to sit in the shade, and if I can’t, I use a towel over my head to shield my face from the sun. A broad-brimmed hat would also protect your face.
Some of the world’s problems seem so big that there’s nothing we can do; consider making this small change to do your bit to protect our precious coral reefs.
In honor of World Oceans Day, I’d like to share my new website, Kat’s Ocean, with all of the Sea Rovers’ Brethren.
Thanks to my friend Lin Fronda back in the Cayman Islands who designed this logo 6 years ago–finally get to use it
The site is still a baby with lots of growing to do. I’ve never built a website before, so I’m still climbing a steep learning curve. You can learn more about me, my life in Bali and my diving adventures in the blog. I plan to expand the UW Photography Tips & Tricks section to perhaps offer courses and answer questions from registered users. There aren’t many pictures in the galleries yet; I have over 23,000 images going back to 2002 to sort through, so I hope you will keep coming back to check out what’s new (and what’s old).