The Schoolchild who Discovered a New Jellyfish Species

Markus — Thu, 11 Apr 2013 00:23:57 +0000

The thing I love the most about scientific discovery is that anyone can do it. Literally anyone could, tomorrow, turn over a stone or look at a seemingly empty spot in the night sky and find something which no human being has ever seen before. Or, perhaps more importantly, something which no one has full appreciated before.

And that’s exactly what happened to nine-year-old Saxon Thomas from Paradise Point in Queensland, Australia. While fishing in a canal in his backyard, Saxon found a jellyfish which he recognised as a box jellyfish. This was surprising at first, because no box jellies had previously been found in these waters. With a little help from his father, he carefully collected the fragile animal into a jar and sent it to Merrick Ekins, a marine expert at the Queensland Museum, to be identified.

But Ekins couldn’t identify it. It’s now been confirmed to actually be a new species, previously unknown to marine biologists. This has caused some consternation among locals who may now be thinking twice about swimming off the nearby coast. A few box jellyfish species are notorious for having extremely painful, and in some cases potentially fatal, stings.

Mercifully, this species is not the box jellyfish, otherwise known as chironex fleckeri, known for its lethal stings. This was the first species which Ekins checked, because if c. fleckeri was found around the coast of Queensland, it would be a big problem for local swimmers. Reassuringly, while the new jellyfish is a related species, it’s definitely not the same one.

Unfortunately though, for now at least, no one’s quite sure whether this new species is dangerous or not. Lacking the resources to investigate it further, local marine biologists explain that they won’t know how severe the stings this jelly can give are until someone is stung by one. Needless to say, no one’s particularly keen to find out voluntarily. While it’s very definitely capable of giving you a sting – this is, after all, how jellyfish catch their prey – it’s probably not life threatening. That said, Ekins cautions that there’s simply no way of knowing this for sure. Swimmers would be well advised to steer clear of them in any case.

Dangerous or otherwise, a new species is always an exciting find for biologists. Lisa Gershwin, director of Australian Marine Stinger Advisory services, shares in the excitement, while wondering what the new jellyfish species should be named. “I haven’t met Saxon yet but my intention is to one of these days when I meet him ask him what he would like it to be named,” she said, in keeping with the tradition that new species are named by whoever discovers it.

However, while this privilege is normally taken by the first scientist to describe the species, Gershwin thinks that Saxon Thomas should have the honour of naming the jellyfish he discovered. She explains, “I wanna give him the choice to name it because I think it’s such a wonderful thing that here’s these kids out playing with nature and going ‘hey wait, that’s different – what’s that?’ – and now we know. What a fabulous find.”

Fabulous indeed. And a reminder that it’s impossible to know when and where discoveries like this will be made next – or who might be there to make them!

Images:
Top – Box jellyfish – Peter Southwood/Wikimedia Commons
Bottom – Saxon Thomas with the jellyfish he found – via ABC Gold Coast

Cite this article:
Hammonds M (2013-04-11 00:23:57). The Schoolchild who Discovered a New Jellyfish Species. Australian Science. Retrieved: May 05, 2024, from http://australianscience.com.au/australia-2/the-schoolchild-who-discovered-a-new-jellyfish-species/

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The post The Schoolchild who Discovered a New Jellyfish Species appeared first on Australian Science.

Great danger for the Great Barrier Reef

Markus — Tue, 30 Oct 2012 00:19:12 +0000

The Great Barrier Reef is easily among the world’s great natural wonders. A world heritage site since 1981, it’s known everywhere as a showcase for the beauty which Earth’s oceans are capable of producing. The world’s largest system of coral reefs, it’s actually composed of over 2900 smaller reefs, stretching along Australia’s coastline for 2600 kilometres. In modern times, it’s a major tourist attraction, and for a lot longer, it’s been part of the culture of Aboriginal Australian people. Unfortunately, the modern world hasn’t been kind to the Great Barrier Reef. A variety of environmental factors are conspiring to make the future for these Australian corals look rather bleak.

Alarmingly, in a study run by the US National Academy of Science earlier this year, it was found that over the past 27 years, the Great Barrier Reef has lost 50% of its corals. Half of the corals in the sites surveyed have disappeared since 1985, and it’s unlikely to be any better in any other locations. Alarmingly, two thirds of the corals lost, have been lost since 1998. Instead of slowing down, it seems that the damage is becoming more rapid over time.

The Great Barrier Reef is, in effect, the Amazon Basin of the Ocean. It’s a huge and bustling hub of biodiversity, rich with all manner of aquatic plant and animal species. Like a land-based rainforest, a vast number of self-contained ecosystems can be found within the reef, and many vulnerable and endangered species make their homes there. Species known to depend on the reef include turtles, crocodiles, dugongs, and sharks, as well as thousands of species of fish and invertebrate – including, of course, the corals themselves.

Climate conditions have been increasingly harrowing for the denizens of the reef, however. Inclement weather, including tropical cyclones, can cause severe damage to coral growths. Global warming is having a lethal effect on corals living near the edge of the reef, which are already at the high end of their temperature tolerance. The warm waters cause corals to expel their zooxanthellae (the symbiotic organisms with live with the coral, photosynthesising and providing around 90% of the coral’s energy requirements) resulting in coral bleaching and, eventually, death as the corals die of starvation. And then there’s the crown of thorns starfish, a natural predator of corals which has seen a sharp increase in numbers in recent years. While the starfish is actually in indigenous inhabitant of the reef, some suspect that overfishing of the starfish’s natural predators has contributed to their recent population explosion.

In light of the troubling findings, Australia’s Environment Minister, Tony Burke, said in an interview to ABC news that “We’ve all heard about damage to the reef over the years, but that 50 per cent figure, I think, rang a warning bell loud and clear for many people.” He also admitted that “there’s no doubt that there’s been a level of neglect for decades which, if it had been dealt with otherwise, we’d be in a much better situation now,” which is at least a sign that the problem is being given the recognition it deserves.

Australia has, in fact, put together its Reef Rescue programme over the past 5 years, spending millions of dollars on protecting the reef from human activities such as run off from land. While there’s not much which can be done about the cyclones which have done the most damage, work is also underway to cull the starfish which are currently the reef’s second biggest threat. Unfortunately, this is painstaking work, as each starfish has to be individually removed by hand. There’s simply no other suitable method.

The question then is how to safeguard the reef in the long term and hopefully help it to recover to its former glory? With one of the biggest future threats to the reef is global warming and the warmer waters which it causes, the method to be used to protect the reef is still under debate. Natalie Ban, who works for the ARC Centre of Excellence in Coral Reef Studies, is reported as saying, “In some areas summer is coming earlier and lasting longer; in others, both summers and winters are warmer than in the past.” Currently, there are two schools of thought on how to go about this – some argue that the most protection should be given to the areas which have suffered least, so that they can act as a haven for reef animals to help repopulate the area; while others would prefer the most vulnerable reef areas to receive the most protection.

Whatever means is chosen, it’s safe to say that Ban speaks for many of us in saying that she hopes for the best way of managing and protecting the reef during “what will undoubtedly be momentous environmental change.”

Images:
Top – Eric Johnson/NOAA
Middle – NASA
Bottom – Toby Hudson/Wikimedia Commons

Cite this article:
Hammonds M (2012-10-30 00:19:12). Great danger for the Great Barrier Reef. Australian Science. Retrieved: May 05, 2024, from http://australianscience.com.au/news/great-danger-for-the-great-barrier-reef/

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The post Great danger for the Great Barrier Reef appeared first on Australian Science.

marine biology – Australian Science

The Schoolchild who Discovered a New Jellyfish Species

Great danger for the Great Barrier Reef