The Great Barrier Reef: Bleached | The Odyssey Online
Start writing a post
Politics and Activism

The Great Barrier Reef: Bleached

If we truly want to preserve our natural wonders, we can't sit by, wishing they'd stay the same.

70
The Great Barrier Reef: Bleached

“The lack of fish was the most shocking thing. In broad terms, I was seeing a lot less than 50 percent of what was there [before the bleaching]. Some species I wasn’t seeing at all.”

Justin Marshall, an investigator with the citizen science group Coral Watch, had just completed a survey of the Great Barrier Reef near Lizard Island. His discoveries, as relayed to The Guardian, were grim.

A natural wonder, Australia's iconic Great Barrier Reef is the largest collection of coral reefs in the world, visible even from space. A sweeping mosaic of life calls the Reef home, from sea cows to dolphins: UNESCO reports "1,500 species of fish, about 400 species of coral, 4,000 species of mollusk, and some 240 species of birds." No other World Heritage site contains this level of biodiversity.

Beautiful as it is, the Great Barrier Reef's in danger. Rising ocean temperatures are leading to a single phenomenon, one that's affected over ninety percent of the Reef: bleaching.

1. What the heck is Bleaching?

Coral is naturally bone-white. The bright range of color below is actually a tiny marine algae living on the coral. Coral gives its algae a "home base," so to speak, and in return the algae provides food for its host.

Hot temperatures sour this relationship. Coral is happiest within a very narrow range of water temperature; when things heat up, the stressed coral kicks its algae out.

The result? Seascapes like this.

Bleached.


An important distinction: bleached coral doesn't mean dead coral. Ocean temperature isn't constant; bleaching happens to various degrees, and always has. Nature's tough. If temperatures cool down once again, algae can return and the reef may recover.

If not, though, the coral--deprived of algae, its energy source--starves.

And when coral starves, the reef transforms. Smaller fish depend on coral for food and shelter; there's little reason to stay once it dies. The bigger fish which eat the smaller ones disappear in suit. Marine birds follow their food--the fish.

Australian scientists reported in April that "...only 7% of the coral reefs across the Great Barrier Reef have completely avoided bleaching." The northern sector of the reef was hardest-hit, with 81% ruled Severely Bleached.

2. What can we do to help?

Rising ocean temperatures are the result of rising global temperatures. Right now, the only way to reverse this uptick in heat is to "dramatically reign in our emission of greenhouse gases."

Great, but how? Our society runs on fossil fuel, and it can seem impossible to tackle an issue as large as that. The secret's in chipping away at that issue, a little bit at a time: we can all take steps to reduce our impact. Reduce your carbon footprint. Try to bike or walk when possible. When driving, don't do it "pedal to the metal."

Scientists across fields are surveying the damage and making every effort to reverse bleaching. The Southern sector of the reef is in relatively good shape for recovery--but only if its environment allows it to heal. Rising temperatures weaken its shot at survival. So does pesticide and chemical runoff from agriculture. So do oil spills: Queensland authorities recently tracked down a ship which spilled 15 tons of oil off the Great Barrier Reef.

If we truly want to preserve our natural wonders, we can't sit by, wishing they'd stay the same. We have to take action and protect them. Nature is resilient, and the Reef may still survive--but only if we ensure the ocean is a place where survival is possible.

Report this Content
This article has not been reviewed by Odyssey HQ and solely reflects the ideas and opinions of the creator.
Relationships

10 Facts All People In A Large Family Can Confirm During The Holiday Season

The holiday season can be the best and most stressful time of the year, especially when more people are involved.

1106
kids jumping

The holidays are full of lights, sweets, sweaters, and your favorite movies. There's nothing quite like this period from the beginning of December through January. Christmas, Hanukkah, and New Years. The fun of it all.

I don't know about you but with my large Italian family something is always going on during this season. It can be the most wonderful time of the year while also being the most hectic. These are a few things you know if your family is anything like mine during this time.

Keep Reading...Show less
10 things that happen the second Thanksgiving is over
reference.com

To those who celebrate, you just spent an entire day cooking an elaborate meal with all of your favorite foods. You probably ate your body weight in pumpkin pie and mashed potatoes. What happens now? Oh yea, Christmas. It’s time to take out all of the decorations and Christmas themed things that have been sitting in the attic since last year; it’s time to make a reappearance. So, here are 10 things that happen the second Thanksgiving is over.

Keep Reading...Show less
Adulting

18 Things I Want To Do Now That I'm 18

I'm technically an adult, so I'm legally required to live a little, right?

4383
Happy Birthday Cake

For the entirety of my high school career, I was always seen as the goody-two-shoes. I never got in trouble with a teacher, I kept stellar grades, and when I wasn't doing extracurricular activities, I was at home studying. Even when I did go out, it was usually with a bunch of fellow band geeks. The night would end before 11:00 PM and the only controversial activity would be a fight based on who unfairly won a round of Apples-to-Apples when someone else clearly had a better card (I promise I'm not still holding a grudge).

Now that I'm officially an adult, I want to pursue some new things. I want to experience life in a way that I never allowed myself to do prior to entering college. These are the years that I'm supposed to embark on a journey of self-discovery, so what better way to do that than to create a bucket list?

Keep Reading...Show less
Featured

10 Life Lessons from Christmas Classics

The holiday classics that shaped my life

2692
10 Life Lessons from Christmas Classics
Flickr

The holiday season is full of stress, debt, and forced conversation. While we rush through the month of December, it's important to take a step back and enjoy the moments before they're gone. Most families love to watch Christmas movies, but these beloved films provide more than entertainment. Here are 10 life lessons that I've learned from the holiday classics we watch every year.

Keep Reading...Show less
Featured

15 Mind-Bending Riddles

Hopefully they will make you laugh.

202074
 Ilistrated image of the planet and images of questions
StableDiffusion

I've been super busy lately with school work, studying, etc. Besides the fact that I do nothing but AP chemistry and AP economics, I constantly think of stupid questions that are almost impossible to answer. So, maybe you could answer them for me, and if not then we can both wonder what the answers to these 15 questions could be.

Keep Reading...Show less

Subscribe to Our Newsletter

Facebook Comments