Saving the Antarctic Ecosystem in the Ross Sea
Ross Sea - A Pristine Marine Ecosystem
Can you imagine a place on this planet where human activity has made the least impact? Where the ecosystem has remained undisturbed for millennia with the creatures of the ecosystem living in harmony and security for all that time. There is such a place and it is the Ross Sea. However, in the last 10-15 years humans have been exploiting this region in the Southern Ocean that surround Antarctica. The reason is that overfishing in all the other oceans has exhausted the marine stock and fisheries are fishing further south in search of exotic fish and seafood.
The consequences of such indiscriminate fishing is enormous. Most of us live in blissful ignorance and continue to live the same way as the previous generations. However, it is time to sit up and take notice. It is time to think of what we are going to hand over to the next generations.
It was as recently as the 1840s that humans were able to land on the mainland of Antarctica though there had been some sightings before that time. It was explorer James Clark Ross, who discovered the Ross Sea named after him, in 1841. The Ross Sea is a large horseshoe-shaped embayment in the Antarctic landmass below New Zealand. In the early 1900s many exploratory expeditions were led into Antarctica and the surrounding ocean and has enriched the scientific knowledge of this area.
We humans have succeeded in exploiting this region to such an extent since late 1990s that many of the species are nearing extinction.
Uniqueness of the Ross Sea Ecosystem
The distance of the Ross Sea from civilization had protected it from being exploited until recently. The urgency of saving this pristine marine ecosystem was brought to the attention of concerned people in 2009 by The Last Ocean Charitable Trust, New Zealand. The Last Ocean with the help of scientist and environmental groups are campaigning to have the Ross Sea designated as a marine protected area.
Research since its discovery has revealed that the Ross Sea is a biodiversity hotspot having many unique ecological characteristics. Since it has remain untouched by human activity in comparison to other marine ecosystems, it has sizable populations of top predators including large fish, penguins, seals, whales and sea birds. For example 26% of the most popular species of penguins, the emperor penguins, are found here. Some of unique species found only in the Ross Sea are:
- a unique genotype of the Adelie penguin
- a species of killer whale, the type C Ross Sea killer whale
- one subspecies of the Weddell seal
- the rare glass sponges are abundant here.
- Over 230 species of sponges
- 157 species of echinoderms (a phylum including starfish, sea urchins and brittle stars)
- 120 species of amphipods (a type of crustacean)
- 235 polychaete species (worms) of which 15 are endemic (only found in Ross Sea)
- 273 molluscan species – the Antarctic scallop plays a major and atypical role in cycling carbon from the water column to seafloor sediments.
- 61 notothenoids fish species (native to Antarctic waters that have proteins in their blood to prevent them from freezing) of which is the Antarctic toothfish a top predator.
- 34 non-notothenoids fish species
- 11 species of seabirds breed here. Two of the largest colonies of emperor penguins in Antarctica are found here.
- 5 species of seals
- 6 species of whales
- 6 species of toothed whales
- colossal squid the largest of all squid species
These are only some of the reasons to preserve the Ross Sea as a no-take marine reserve.
The Ross Sea, Antarctica by John Weller (9.02 mins)
- U.S. Chefs Join Campaign to Save Chilean Sea Bass
In the past decade, the Chilean sea bass, also known as the Patagonian Toothfish, has become a popular item on many of America's best seafood menus. But the fish has become a victim of its own popularity.
- 'Eco-Friendly' Chilean Sea Bass May Not Be So Green - ScienceNOW
According to a new study of Chilean sea bass bearing the label of the Marine Stewardship Council (MSC), which gives seafood products its stamp of approval. Nearly one in five fillets sampled by the researchers may not have been sustainably caught.
Antarctic Toothfish or the Chilean Sea Bass
The Antarctic Toothfish (dissostichus mawsoni) is a close relative of the Patagoinan Toothfish (dissostichus eleginoides) and are both sold as Chilean sea bass. The Antarctic toothfish or Antarctic cod is found in the icy cold waters of the Southern Ocean and is a notothenoid and able to survive in such conditions. There is very little known about its life-history even after 40 years of research. For example, no eggs, larvae or small juveniles have ever been found. They are long-lived, up to 50 years and reach maturity at around 17 years. They are quite large, the size of an average human being, growing up to 175 cm and up to 200 pounds. They are not thought to spawn annually, and this in conjunction with their late maturity makes them highly vulnerable to overfishing.
By the year 2011 an estimated 20% of adult toothfish had been reduced, although there are not reliable scientific data on the original population. For all we know it might be more than 20% which we have exploited in the name of satisfying our taste buds. An indicator of a loss of numbers is that scientists are now unable to catch adult and large sub-adult fish in southern McMurdo Sound where 200-500 per year were routinely caught in a scientific tag-release programme that was started in 1972.
Precious Sub-Antarctic flora and fauna taken from the Rainbow Warrior
Why Save the Top Predators of an Ecosystem?
It is the top predators like the tigers, lions, sharks, tuna, billfish, whales and seals who influence the structure and function of an ecosystem. Without these predators prey populations would increase to such an extent that it would destabilize the food web of the terrestrial or marine ecosystems. A food web is a system of interlocking and interdependent food chains. Even if one link in the food web is broken it can cause a cascade of complex of effects for the whole planet including humans.
Soaring demand for the Chilean sea bass in the USA and Asian markets is a major threat to the Antarctic ecosystem. Not only is the legal 3000 tonnes of Antarctic toothfish caught every year, there is a threat of illegal fishing as well. The chilean sea bass are caught with bottom longlines which can kill endangered albatrosses, sea creatures and birds.
Save the Last Pristine Ocean on Earth
In the process of saving the top predators such as the Antarctic toothfish, killer whales, seals, albatrosses and the colossal squid we will be able to save the delicate balance of Nature. There are four main threats to the Antarctic ecosystem:
- Predator loss
- Climate change
- Habitat destruction
The Last Ocean - Official Trailer (2.46mins)
- The Last Ocean New Zealand
Hidden away at the bottom of the world is the most pristine stretch of ocean on Earth, the Ross Sea Antarctica. The toothfish is a key predator and unless fishing is stopped the natural balance of the Ross Sea ecosystem will be lost forever.
How Can We help?
There are few immediate steps we all can take to protect the Antarctic ecosystem irrespective of which country we live in:
- Say no to eating Chilean sea bass and other exotic seafood.
- Say no to any seafood, become a vegetarian or vegan
- If you don't feel ready to go vegan or vegetarian, then reduce consumption of seafood.
- Reduce your carbon footprint in every way possible
- be aware that 'ecofriendly' or 'green' or 'sustainably' obtained chilean sea bass is really not so
- spread the word
- sign the petition.
- Watch the movie – The Last Ocean when it comes to your town or online.
The Last Ocean feature documentary was screened at the New Zealand International Film Festival and screenings are being held in many cities in next few months. Check out their blog for the latest news.
The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) was established by international convention in 1982 with the objective of conserving Antarctic marine life.
CCAMLR -- Convention on the Conservation of Antarctic Marine Living Resources
The ecosystems of the Southern Ocean that surrounds Antarctica is primarily governed by the CCAMLR, a key component of the Antarctic Treaty System. It is important that CCAMLR designate a large-scale, no-take marine reserve in the Ross Sea. This is the only chance to preserve the least-impacted marine region on Earth for future generations. The Antarctic Ocean Alliance recommends that CCAMLR establish a fully protected marine reserve of approximately 3.6 million square kilometers in the Ross Sea region as a first step towards creating many more marine reserves around Antarctica.
The CCAMLR commission has 25 member nations and convenes for discussions once a year (usually in October-November). Sign the petition to add your voice to protect the last relatively untouched ocean on this planet.
Learn More and Take Action
- What's at Stake
The oceans around Antarctica are the only oceans on this earth still relatively untouched by human activity. They are home to almost 10,000 unique and diverse species, many of which cannot be found anywhere else on the planet.
- Antarctic Ocean Alliance
The Antarctic Ocean Alliance (AOA) is a coalition of leading environmental and conservation organisations working to establish a network of designated, no-take marine reserves and marine protected areas in the Antarctic.