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More than 100,000 tourists will head to Antarctica this summer. Should we worry about damage to the ice and its ecosystems?

As the summer sun finally arrives for people in the Southern Hemisphere, more than 100,000 tourists will head for the ice. Travelling on one of more than 50 cruise ships, they will brave the two-day trip across the notoriously rough Drake Passage below Patagonia, destined for the polar continent of Antarctica. During the COVID summer of 2020-21, just 15 tourists on two yachts visited Antarctica. But now, tourism is back – and bigger than ever. This season’s <a href="https://iaato.org/wp-content/uploads/2022/06/ATCM44-IAATO-Overview.pdf">visitor numbers</a> are up more than 40% over the largest <a href="https://iaato.org/wp-content/uploads/2020/07/IAATO-on-Antarctic-visitor-figures-2019-20-FINAL.pdf">pre-pandemic year</a>. So are all those tourists going to damage what is often considered the last untouched wilderness on the planet? Yes and no. The industry is well run. Tourists often return with a new appreciation for wild places. They spend a surprisingly short amount of time actually on the continent or its islands. But as tourism grows, so will environmental impacts such as black carbon from cruise ship funnels. Tourists can carry in microbes, seed and other invasive species on their boots and clothes – a problem that will only worsen as ice melt creates new patches of bare earth. And cruise ships are hardly emissions misers. <h2>How did Antarctic tourism go mainstream?</h2> In the 1950s, the first tourists hitched rides on Chilean and Argentinian naval vessels heading south to resupply research bases on the South Shetland Islands. From the late 1960s, dedicated icebreaker expedition ships were venturing even further south. In the early 1990s, as ex-Soviet icebreakers became available, the industry began to expand – about a dozen companies offered trips at that time. By the turn of this century, the ice continent was receiving more than 10,000 annual visitors: Antarctic tourism had gone mainstream. What does it look like today? Most Antarctic tourists travel on small “expedition-style” vessels, usually heading for the relatively accessible Antarctic Peninsula. Once there, they can take a zodiac boat ride for a closer look at wildlife and icebergs or shore excursions to visit penguin or seal colonies. Visitors can kayak, paddle-board and take the polar plunge – a necessarily brief dip into subzero waters. For most tourists, accommodation, food and other services are provided aboard ship. Over a third of all visitors never stand on the continent. Those who do set foot on Antarctica normally make brief visits, rather than taking overnight stays. For more intrepid tourists, a few operators offer overland journeys into the continent’s interior, making use of temporary seasonal camp sites. There are no permanent hotels, and Antarctic Treaty nations recently <a href="https://documents.ats.aq/ATCM44/fr/ATCM44_fr001_e.pdf">adopted a resolution</a>against permanent tourist facilities. As tourists come in increasing numbers, some operators have moved to offer ever more adventurous options such as mountaineering, heli-skiing, underwater trips in submersibles and scuba diving. <h2>Is Antarctic tourism sustainable?</h2> As Antarctic tourism booms, some advocacy organisations have warned the impact may be unsustainable. For instance, the Antarctic and Southern Ocean Coalition <a href="https://www.asoc.org/campaign/responsible-tourism-and-shipping/">argues</a> cruise tourism could put increased pressure on an environment already under significant strain from climate change. In areas visited most by tourists, the snow has a <a href="https://theconversation.com/each-antarctic-tourist-effectively-melts-83-tonnes-of-snow-new-research-177597">higher concentration</a> of black carbon from ship exhaust, which soaks up more heat and leads to snow melt. Ship traffic also risks carrying <a href="https://www.pnas.org/doi/10.1073/pnas.2110303118">hitchhiking invasive species</a> into the Southern Ocean’s vulnerable marine ecosystems. That’s to say nothing of greenhouse gas emissions. Because of the continent’s remoteness, tourists visiting Antarctica have a <a href="https://www.tandfonline.com/doi/full/10.1080/09669581003653534">higher per capita carbon footprint</a>than other cruise-ship travellers. Of course, these impacts aren’t limited to tourism. Scientific expeditions come with similar environmental costs – and while there are far fewer of them, scientists and support personnel spend far more time on the continent. <h2>Antarctic tourism isn’t going away – so we have to plan for the future</h2> Are sustainable cruises an oxymoron? Many <a href="https://www.popsci.com/environment/why-cruise-ships-are-bad-for-the-environment/#:%7E:text=Studies%20have%20shown%20one%20cruise,in%20unhealthy%20levels%20of%20pollution.">believe so</a>. Through its sheer size, the cruise industry has created <a href="https://theconversation.com/time-to-rock-the-boat-cruise-ships-can-destroy-the-very-destinations-they-sell-to-us-55245">mass tourism</a> in new places and <a href="https://theconversation.com/overtourism-a-growing-global-problem-100029">overtourism</a> in others, generating unacceptable levels of crowding, disrupting the lives of residents, repurposing local cultures for “exotic” performances, damaging the environment and adding to emissions from fossil fuels. In Antarctica, crowding, environmental impact and emissions are the most pressing issues. While 100,000 tourists a year is tiny by global tourism standards – Paris had almost 20 million in 2019 – visits are concentrated in highly sensitive ecological areas for only a few months per year. There are no residents to disturb (other than local wildlife), but by the same token, there’s no host community to protest if visitor numbers get too high. Even so, strong protections are in place. In accordance with the Antarctic Treaty System – the set of international agreements signed by countries with an Antarctic presence or an interest – tourism operators based in those nations have to apply for permits and follow <a href="https://www.ats.aq/e/protocol.html">stringent environmental regulations</a>. To avoid introducing new species, tourists have to follow rules such as disinfecting their boots and vacuuming their pockets before setting foot on the ice, and keeping a set distance from wildlife. Almost all Antarctic cruise owners belong to the International Association of Antarctica Tour Operators, the peak body that manages Antarctic tourism. For the first time this year, operators have to report their <a href="https://iaato.org/antarctic-tour-operators-fuel-consumption-to-be-analysed-as-they-embark-on-climate-strategy/">overall fuel consumption</a> as part of IAATO’s efforts to make the industry more climate-friendly. Some operators are now using hybrid vessels that can run partly on electric propulsion for short periods, reducing carbon dioxide emissions. <h2>Returning from the ice: the ambassador effect</h2> Famed travel writer Pico Iyer <a href="https://www.nytimes.com/2022/11/17/t-magazine/travel-destinations-experiences.html?te=1&nl=from-the-times&emc=edit_ufn_20221127">recently wrote</a> of his experience in the deep south of the world. The visit, he said, “awakens you to the environmental concerns of the world … you go home with important questions for your conscience as well as radiant memories”. Iyer isn’t alone. This response is widespread, known in the industry as <a href="https://www.cambridge.org/core/journals/polar-record/article/what-and-who-is-an-antarctic-ambassador/4943D999A9D58BC00D1705C110075163">Antarctic ambassadorship</a>. As you’d expect, this is <a href="https://iaato.org/antarctic-ambassadors/antarctic-ambassadors/">strongly promoted</a> by tourism operators as a positive. Is it real? That’s contentious. Studies on links between polar travel and pro-environmental behaviour have yielded <a href="https://doi.org/10.1017/S0032247408007456">mixed results</a>. We are working with two operators to examine the Antarctic tourist experience and consider what factors might feed into a long-lasting ambassador effect. If you’re one of the tourists going to Antarctica this summer, enjoy the experience – but go with care. Be aware that no trip south comes without environmental cost and use this knowledge to make clear-eyed decisions about your activities both in Antarctica and once you’re safely back home. Image credits: Getty Images This article originally appeared on <a href="https://theconversation.com/more-than-100-000-tourists-will-head-to-antarctica-this-summer-should-we-worry-about-damage-to-the-ice-and-its-ecosystems-192843" target="_blank" rel="noopener">The Conversation</a>.

International Travel

Artificial intelligence tool learns “song of the reef” to determine ecosystem health

Coral reefs are among Earth’s most stunning and biodiverse ecosystems. Yet, due to human-induced climate change resulting in warmer oceans, we are seeing growing numbers of these living habitats dying. The urgency of the crisis facing coral reefs around the world was highlighted in a recent <a class="spai-bg-prepared" href="https://www.gbrmpa.gov.au/the-reef/reef-health" target="_blank" rel="noreferrer noopener">study</a> that showed that 91% of Australia’s Great Barrier Reef had experienced coral bleaching in the summer of 2021–22 due to heat stress from rising water temperatures. Determining reef health is key to gauging the extent of the problem and developing ways of intervening to save these ecosystems, and a new artificial intelligence (AI) tool has been developed to measure reef health using… sound. Research coming out of the UK is using AI to study the soundscape of Indonesian reefs to determine the health of the ecosystems. The results, <a class="spai-bg-prepared" href="https://www.sciencedirect.com/science/article/pii/S1470160X22004575?via%3Dihub" target="_blank" rel="noreferrer noopener">published</a> in Ecological Indicators, shows that the AI tool could learn the “song of the reef” and determine reef health with 92% accuracy. The findings are being used to track the progress of reef restoration. “Coral reefs are facing multiple threats, including climate change, so monitoring their health and the success of conservation projects is vital,” says lead author Ben Williams of the UK’s University of Exeter. <div class="newsletter-box spai-bg-prepared"> <div id="wpcf7-f6-p193163-o1" class="wpcf7 spai-bg-prepared" dir="ltr" lang="en-US" role="form"> </div> </div> “One major difficulty is that visual and acoustic surveys of reefs usually rely on labour-intensive methods. Visual surveys are also limited by the fact that many reef creatures conceal themselves, or are active at night, while the complexity of reef sounds has made it difficult to identify reef health using individual recordings. “Our approach to that problem was to use machine learning – to see whether a computer could learn the song of the reef. Our findings show that a computer can pick up patterns that are undetectable to the human ear. It can tell us faster, and more accurately, how the reef is doing.” Fish and other creatures make a variety of sounds in coral reefs. While the meaning of many of these calls remains a mystery, the new machine-learning algorithm can distinguish overall between healthy and unhealthy reefs. Recordings used in the study were taken at the <a class="spai-bg-prepared" href="http://www.buildingcoral.com/" target="_blank" rel="noreferrer noopener">Mars Coral Reef Restoration Project</a>, which is restoring heavily damaged reefs in Indonesia. The study’s co-author Dr Tim Lamont, a marine biologist at Lancaster University, said the AI method provides advantages in monitoring coral reefs. “This is a really exciting development,” says Lamont. “Sound recorders and AI could be used around the world to monitor the health of reefs, and discover whether attempts to protect and restore them are working. “In many cases it’s easier and cheaper to deploy an underwater hydrophone on a reef and leave it there than to have expert divers visiting the reef repeatedly to survey it, especially in remote locations.” <img id="cosmos-post-tracker" class="spai-bg-prepared" style="opacity: 0; height: 1px!important; width: 1px!important; border: 0!important; position: absolute!important; z-index: -1!important;" src="https://syndication.cosmosmagazine.com/?id=193163&title=Artificial+intelligence+tool+learns+%E2%80%9Csong+of+the+reef%E2%80%9D+to+determine+ecosystem+health" width="1" height="1" /> <div id="contributors"> <a href="https://cosmosmagazine.com/technology/artificial-intelligence-reef-song/" target="_blank" rel="noopener">This article</a> was originally published on <a href="https://cosmosmagazine.com" target="_blank" rel="noopener">Cosmos Magazine</a> and was written by <a href="https://cosmosmagazine.com/contributor/evrim-yazgin" target="_blank" rel="noopener">Evrim Yazgin</a>. Evrim Yazgin has a Bachelor of Science majoring in mathematical physics and a Master of Science in physics, both from the University of Melbourne. Image: Getty Images </div>

Technology

Marine protected area is long overdue: Humans threaten the Antarctic Peninsula’s fragile ecosystem

Antarctica, the world’s <a href="https://media.nature.com/original/magazine-assets/d41586-018-07183-6/d41586-018-07183-6.pdf">last true wilderness</a>, has been protected by an <a href="https://www.ats.aq/e/antarctictreaty.html">international treaty</a> for the last 60 years. But the same isn’t true for most of the ocean surrounding it. <a href="https://www.asoc.org/advocacy/marine-protected-areas">Just 5%</a> of the Southern Ocean is protected, leaving biodiversity hotspots exposed to threats from human activity. The Western Antarctic Peninsula, the northernmost part of the continent and one of its <a href="https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0011683">most biodiverse regions</a>, is particularly vulnerable. It faces the cumulative threats of commercial krill fishing, tourism, research infrastructure expansion and climate change. In an <a href="https://www.nature.com/articles/d41586-020-02939-5">article</a> published in Nature today, we join more than <a href="https://homewardboundprojects.com.au/about/">280 women in STEMM</a> (science, technology, engineering, maths and medicine) from the global leadership initiative Homeward Bound to call for the immediate protection of the peninsula’s marine environment, through the designation of a <a href="https://www.antarcticanow.org/">marine protected area</a>. Our call comes ahead of a meeting, due in the next fortnight, of the <a href="https://www.ccamlr.org/en">international group</a> responsible for establishing marine protected areas in the Southern Ocean. We urge the group to protect the region, because delays could be disastrous. Threats on the peninsula The Southern Ocean <a href="https://theconversation.com/explainer-how-the-antarctic-circumpolar-current-helps-keep-antarctica-frozen-106164">plays a vital role</a> in global food availability and security, regulates the planet’s climate and drives global ocean currents. Ice covering the continent stores 70% of the earth’s freshwater. Climate change threatens to unravel the Southern Ocean ecosystem as species superbly adapted to the cold struggle to adapt to warmer temperatures. The impacts of climate change are especially insidious on the Western Antarctic Peninsula, one of the fastest-warming places on Earth. In February, temperatures reached a record high: <a href="https://theconversation.com/anatomy-of-a-heatwave-how-antarctica-recorded-a-20-75-c-day-last-month-134550">a balmy 20.75℃</a>. The peninsula is also the <a href="https://theconversation.com/humans-are-encroaching-on-antarcticas-last-wild-places-threatening-its-fragile-biodiversity-142648">most-visited part of Antarctica</a>, thanks to its easy access, dramatic beauty, awe-inspiring wildlife and rich marine ecosystems. Tourist numbers have doubled in the past decade, increasing the risk of introducing invasive species that hitch a ride on the toursts’ gear. More than <a href="https://www.scribd.com/document/470576496/Polar-Perspectives-No-1-Is-it-time-for-a-paradigm-shift-in-how-Antarctic-tourism-is-controlled#download&from_embed">74,000 cruise ship passengers</a> visited last year, up from 33,000 in the 2009-10 season. <a href="https://theconversation.com/australia-wants-to-build-a-huge-concrete-runway-in-antarctica-heres-why-thats-a-bad-idea-139596">The expansion of infrastructure</a> to accommodate scientists and research, such as buildings, roads, fuel storage and runways, can also pose a threat, as it displaces local Antarctic biodiversity. Eighteen nations have science facilities on the Antarctic Peninsula, the highest concentration of research stations anywhere on the continent. There are 19 permanent and 30 seasonal research bases there. Another big threat to biodiversity in the peninsula is the commercial fishing of Antarctic krill, a small, shrimp-like crustacean which is the <a href="https://royalsocietypublishing.org/doi/10.1098/rspb.2017.2015">cornerstone of life</a> in this region. A cornerstone of life Krill is a foundation of the food chain in Antarctica, with whales, fish, squid, seals and Adélie and gentoo penguins all feeding on it. But as sea ice cover diminishes, more industrial fishing vessels can encroach on penguin, seal and whale foraging grounds, effectively acting as a competing super-predator for krill. In the past 30 years, colonies of Adélie and Chinstrap penguins on the Antarctic Peninsula have <a href="https://www.jstor.org/stable/41242231?seq=1">declined by more than 50%</a> due to reduced sea ice and krill harvesting. Commercial Antarctic krill fishing is largely for omega-3 dietary supplements and fish-meal. The fishery in the waters of the Western Antarctic Peninsula is the largest in the <a href="https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1467-2979.2011.00406.x">Southern Ocean</a>. The krill catch here has <a href="https://www.ccamlr.org/en/fisheries/krill">more than tripled</a> from 88,800 tonnes in 2000 to almost 400,000 tonnes in 2019 — the third-largest krill catch in history and a volume not seen since the 1980s. How do we save it? To save the Antarctic Peninsula, one of critical steps is to protect its waters and its source of life: those tiny, but crucially important, Antarctic krill. <img style="width: 500px; height: 281.25px;" src="https://oversixtydev.blob.core.windows.net/media/7838471/antarctica-3.jpg" alt="" data-udi="umb://media/b40e7f32cd174fa39cb137d91ce94e0f" /> Image caption: A map of the current and proposed marine protected areas under consideration. Cassandra Brooks, Author provided This can be done by establishing a marine protected area (MPA) in the region, which would limit or prohibit human activities such as commercial fishing. An MPA around the peninsula was first proposed <a href="https://www.researchgate.net/publication/336888437_Protecting_Antarctica_through_Co-production_of_actionable_science_Lessons_from_the_CCAMLR_marine_protected_area_process">in 2018</a>, <a href="https://www.ccamlr.org/en/science/mpa-planning-domains">covering</a> 670,000 square kilometres. But the Commission for the Conservation of Antarctic Marine Living Resources (the organisation responsible for establishing MPAs in the Southern Ocean) has yet to reach agreement on it. The proposed MPA is an excellent example of balancing environmental protection with <a href="https://theconversation.com/no-take-marine-areas-help-fishers-and-fish-far-more-than-we-thought-119659">commercial interests</a>. The area would be split into two zones. The first is a general protection zone covering 60% of the MPA, designed to protect different habitats and key wildlife and mitigate specific ecosystem threats from fishing. The second is a krill fishery zone, allowing for a precautionary management approach to commercial fishing and keeping some fishing areas open for access. <img style="width: 500px; height: 281.25px;" src="https://oversixtydev.blob.core.windows.net/media/7838472/antarctica-2.jpg" alt="" data-udi="umb://media/be0da721223d49479b289f835fa16b2b" /> Image caption: A map of the current and proposed marine protected areas under consideration. Cassandra Brooks, Author provided The proposed MPA would stand for 70 years, with a review every decade so zones can be adjusted to preserve ecosystems. No more disastrous delays The commission is made up of 25 countries and the European Union. In its upcoming meeting, the proposed MPA will once again be considered. Two other important MPA proposals are also on the table in the East Antarctic and Weddell Sea. In fact, for <a href="https://www.theguardian.com/environment/2019/nov/02/antarctic-marine-park-conservationists-frustrated-after-protection-bid-fails-for-eight-time">eight consecutive years</a>, the proposal for a marine park in Eastern Antarctica has failed. Delays like this are potentially disastrous for the fragile ecosystem. Protecting the peninsula is the most pressing priority due to rising threats, but the commission should adopt all three to fulfil their <a href="https://www.researchgate.net/publication/269874896_Competing_values_on_the_Antarctic_high_seas_CCAMLR_and_the_challenge_of_marine-protected_areas">2002 commitment</a> to establishing an MPA network in Antarctica. If all three were established, then more than 3.2 million square kilometres of the Southern Ocean would be protected, giving biodiversity a fighting chance against the compounding threats of human activity in the region. Written by <a href="https://theconversation.com/profiles/marissa-parrott-561432">Marissa Parrott</a>, University of Melbourne; <a href="https://theconversation.com/profiles/carolyn-hogg-1166504">Carolyn Hogg</a>, University of Sydney; <a href="https://theconversation.com/profiles/cassandra-brooks-419939">Cassandra Brooks</a>, University of Colorado Boulder; <a href="https://theconversation.com/profiles/justine-shaw-299755">Justine Shaw</a>, The University of Queensland, and <a href="https://theconversation.com/profiles/melissa-cristina-marquez-1166518">Melissa Cristina Márquez</a>, Curtin University. Republished with permission of <a href="https://theconversation.com/humans-threaten-the-antarctic-peninsulas-fragile-ecosystem-a-marine-protected-area-is-long-overdue-147671">The Conversation.</a>

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More than 100,000 tourists will head to Antarctica this summer. Should we worry about damage to the ice and its ecosystems?

Artificial intelligence tool learns “song of the reef” to determine ecosystem health

Marine protected area is long overdue: Humans threaten the Antarctic Peninsula’s fragile ecosystem