Feature Destination
On Thin Ice! Polar Bears in a Warming World: The Impact of Arctic Sea Ice Loss
By Stephanie L. Swanson
The Arctic is a very unique ecosystem, having many characteristics that distinguish it from other systems found at mid and lower latitudes. The Arctic is a place like no other with its complete darkness in the winter, continuous daylight in the summer, frigid yearlong temperatures, extreme winters, and its widespread shelf seas located around the deep ocean basin. Although, its greatest distinguishing characteristic is the permanent ice cap that is composed of multiyear ice and first year ice that gets added each year. This Arctic sea ice reaches out over the vast ocean areas, extending and retreating seasonally as the weather changes.
With the increase in overall climate temperatures, the Arctic ecosystem is in peril. Warming in the Arctic is double to triple the overall global rate of 0.4°C. These escalations in Arctic temperatures can be seen in the rapid reduction and alteration in the Arctic sea ice. Arctic sea ice has been progressively decreasing since 1979. According to researchers, the area the ice covered has deteriorated from 16.5 million km² in 1979 to 15.25 million km² in 2009; that’s a decrease of approximately 45,000 km² per year. However, the sea ice is not only decreasing in area, but in thickness as well. In the past ten years alone, there has been a reduction of multiyear sea ice at triple the normal rate seen over the past three decades. A significant thinning of multiyear ice of approximately 0.6 m was seen between 2004 and 2008. Additionally, with the warming temperatures, there is a reduction in snow fall and the creation of first year ice. With the reduction of first year ice, there is nothing to counteract the loss of multiyear ice. What’s more, the sea ice is breaking up earlier in the year and freezing later, causing a longer period of open-water time within the Arctic. If the loss of sea ice continues on its current path, it is predicted that Arctic waters could be ice free in summers by 2035.
The loss of sea ice in the Arctic is significantly altering the habitat of Arctic marine mammals who have evolved to reside in the unique Arctic climate. Arctic marine mammals are highly specialized for the Arctic environment and dependent upon the sea ice for survival. Furthermore, these mammals are unequipped to quickly respond to the rapidly shifting ecosystem as a result of climate change. There are seven marine mammal species that call the Arctic home year round; four of which are ice-obligate species, meaning that they are completely reliant on sea ice platforms for their livelihood. Ice-obligate species, like the polar bear, are well adapted for life on sea ice, and this sea ice is crucial for all aspects of their lives. This dependency on sea ice makes ice-obligate species susceptible to changes in climate that results in the loss of sea ice, especially if this change is sudden and on a large scale.
Polar bears are categorized as marine mammals as their preferred habitat is Arctic sea ice. They are the world’s largest species of carnivore found on land, weighing in between 900 and 1,600 pounds and averaging in size between 7 and 8 feet from head to tail. These animals are well adapted for life on the Arctic sea ice, with thick fur and layer of blubber. This blubber provides insulation against the cold and buoyancy for aid in swimming. Additionally, they have large, oar-like, front feet and a streamlined neck and skull perfectly adapted for swimming in the Arctic. As a marine mammal, they spend almost all of their life upon the sea ice, and depend on it for hunting, mating, and traveling.
Polar bears reside throughout the Arctic’s ice covered seas. As one of the most ice dependent Arctic marine mammal and a top predator, the polar bear is a significant indicator of the health of the entire ecosystem. As the Arctic sea ice changes and recedes, it has a negative effect on certain populations and individual polar bears in the Arctic. These negative effects reach into all aspects of the polar bears life, movements, food availability, health and reproduction, and interactions with humans. Furthermore, longer traveling distances over rougher sea ice and through open water will greatly increase the chances of injury, sickness, and death.
Polar bears are known for their annual movement patterns within their individual home ranges, and these movements are dependent on the Arctic sea ice. While polar bears are capable of and adapted for swimming large distances, swimming takes more energy and they prefer to travel using sea ice. Furthermore, as Arctic temperatures continue to increase, it will continue to affect the sea ice. As a result, the ice will reduce in thickness and area, causing the ice to be more labile. This can cause the ice to fracture and sections of ice to break away from the main body of ice; polar bears on the ice when it fractures will be drifting away from their home range and it may result in a difficult trip to return. Past research reported such cases happening in Southwest Greenland and Newfoundland. With the loss of sea ice, polar bears are forced to land resulting in a decrease in the access of prey, mates, and denning areas.
Polar bears are also reliant upon the sea ice for foraging/hunting as they have developed an extreme specialization in prey. They rely on the availability and accessibility of ringed and bearded seals, their favored prey, for developing fat reserves. In the summer and autumn seasons, polar bears are cut off from their prey due to the loss of sea ice, consequently they must fast and relay on fat reserves for approximately four months until the ice expands again in the winter. Furthermore, female polar bears that are pregnant fast for up to 8 months because they remain on land for denning, birthing, nursing, and waiting for their cubs to grow large enough to travel safely onto the sea ice. However, with the warming temperatures, the ice is breaking up earlier and freezing later causing the length of fasting time for these bears to increase. In addition, the loss of sea ice during peak hunting seasons results in the polar bears inability to hunt seals. This is because polar bears do not capture their prey in open water. With the sea ice retreating further back, polar bears are unable to reach the seal pups that they feed on to gain the fat stores that carry them through their fasting periods. Recently, researchers have found that this lack of food availability has led to cannibalism within polar bear populations.
The collective effects of increased energy demands and the decrease in access to prey can lead to a decrease in body condition and other health related problems. With the shifts in prey and the amount of fasting time increased, the body condition of polar bears has been greatly affected. The premature break up of sea ice interrupts and shortens the polar bears feeding at the most crucial time of the year. Resulting in a poorer body condition before and during the seasonal fasting period. For the past three decades, researchers have seen a decline in the body condition of all ages of polar bears. This lower pre-fasting body condition leads to lower reproductive success, smaller litter sizes, and lower body conditions of both cubs and mother upon leaving the den. Overall, polar bears are free of parasites and rarely show signs of disease; however, lower body conditions will leave them more vulnerable to disease and parasites.
As the sea ice diminishes and food sources become scarce, polar bears venture inland often coming into contact with humans. In some locations, such as Hudson Bay, Foxe Basin, Baffin Bay, and Davis Strait, the sea ice completely melts causing the resident polar bear to spend months on land. Hungry and in search of food, these bears journey into human populated areas. This increase leads to an increase in human/bear conflict where ‘problem bears’, or bears that pose a risk to human life and/or property, are often killed.
In general, human-polar bear conflict occurs in one of three conditions: (1) polar bear(s) approach or wonder into human settlements, (2) polar bear(s) encounter humans working or camping in the tundra or on pack ice, and (3) people approaching polar bear(s) or their dens. The majority of human-polar bear conflict takes place when bears wonder into settlements, camps, and other human sites, where they raid food caches, damage property, attack dog and/or people, and overall endanger public safety. This may be due to food stressed/hungry bears being attracted to places where sled dogs are fed and housed, animals that were hunted for food get processed, and the remains of whale, seal, and caribou get discarded. Very rarely does human-polar bear conflict occur because the polar bear views humans as a food source. However, with the recent increase of ecotourism and Arctic research due to climate change, human-polar bear conflicts have increased, not only due to the influx of humans, but the lack of safety education and risk taking behavior.
Take Action
As a traveler or researcher, there are several actions one can take to insure the safety of both yourselves and the polar bears, while still enjoying all the Arctic has to offer. Be aware of your surroundings, do not take any unnecessary risks, and never approach a polar bear or their den. Before traveling, educate yourself on conflict prevention techniques and the laws regarding wildlife in the area in which you will be going. Keep all food items in bear proof containers and keep deterrence items, such as marine flares, cracker shells, bear bangers, and paper spray, with you during your travels. You can also help protect these animals from where you live by educating yourself on how the warming temperatures are impacting the Arctic ecosystem and how the loss of sea ice is impacting ice-obligate species. Easy steps taken at home, such as being energy-efficient, eating sustainable seafood, and minimizing consumption, can aide in slowing the loss of Arctic sea ice.

Stephanie Swanson is a conservationist and recent graduate of Miami University’s Project Dragonfly program; where she obtained a Masters in Conservation Biology. The focus of her studies is marine mammal awareness and conservation.
References
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Art & Culture
Sixteen days in Tunisia

Tunisia is named after Tunis. Not the other way around. If the country takes its name from the city, then any attempt to understand Tunisia must start in Tunis.
Before reading any further, look at a map. You must appreciate the exceptional location of Tunis; only then does the city make full sense. Historically, Tunis was little more than a compact nucleus pressed in the strip of land between the Séjoumi lagoon (a flamingo sanctuary) and Lake Tunis, once the natural harbour. Everything that now feels expansive, avenues, neighbourhoods, infrastructure, rests on land reclaimed from water. Bab Al-Bhar, the Sea Gate, crystallises this transformation: standing there today, flanked by white buildings, you have to imagine the water once visible straight through the gate. The city quite literally stole land from the sea as it expanded.
That tension between land and water, between natural geography and human intervention, repeats itself everywhere in Tunisia. An artificial peninsula appears in the ancient harbours of Carthage. Salt lakes replace vanished seas in Chott el Djerid. Urban coastlines are pushed back, fortified, paved over. Today, the landscape bears the marks of centuries of negotiation with water, sometimes reverent, sometimes violent. But let’s stay in the capital for a moment.
Visiting the medina (old town) on a Sunday, when most souks are closed, made the architecture audible. Without the commercial noise, proportions, light and texture take over; the business-day buzz is thrilling, but silence teaches you how the city breathes. That quiet also sharpens your attention to thresholds. And then the beauty of the doors hits you. Again and again. Painted, carved, symbolic, they demand to be read, often concealing unexpected worlds behind them. In the medina, access is never guaranteed: museums may still be family homes, so you knock, you wait and someone might let you in. Knowledge survives through generosity. This constant negotiation between private and public space explains why repurposing feels so natural here. People inhabit ancient burial sites, former shrines become cafés and even the old slave market has transformed into the jewellers’ quarter; history reused rather than erased. The twenty madrasas scattered through the medina embody this logic perfectly: still embedded in daily life, neither fully public nor entirely private, their doors test your luck. Finally stepping inside one felt unreal, courtyards opening suddenly, tiled interiors that seemed imagined rather than constructed. I honestly felt I was dreaming.
But don’t forget to look up, as architecture constantly communicates power, belief and belonging, often far more than we initially perceive. The green-tiled domes signalling burial places, the octagonal or patterned motifs minarets proclaiming variants of Islam (Ottoman and Almohad respectively) or the colour codes identifying hammams and barber shops all speak a visual language that locals instinctively read. In Tunis, belief is never private, it is inscribed into skylines and façades.
That inscription extends inward. Mosques feel less like austere institutions than wellness centres, spaces of rest, learning and calm. Mats are placed against ancient columns to shield people’s backs from the cool marble. I even witnessed people nap inside Al-Zaytuna. So much peace that you can sleep. How do churches compare?

Al-Zaytuna itself is the city’s anchor, the Great Mosque. The souks grew around it, originally as little more than rented awnings, now covered streets wrapping commerce around devotion. You walk through trade and suddenly stumble into the sacred. Built in the seventh century, shortly after the Islamic conquest of Byzantine Africa, the mosque stands on layers of belief. While it is likely that a temple existed here since antiquity, legend says it was built on the shrine of Saint Olive of Palermo. “Zaytuna” means olive, in Arabic and in Spanish. Language preserves memory even when stones are repurposed. Indeed, the entire prayer hall is held by a forest of Roman columns and capitals, older worlds literally supporting newer ones.
As a Spaniard, Tunisia had many a surprise in store for me. Rue des Andalous reveals one of Tunisia’s most consequential migrations. During the Middle Ages, much of Spain was Muslim. Forced conversions, expulsions and finally the mass expulsion even of Moriscos (former Muslims converted to Christianity) in 1609 drove tens of thousands across the sea. Spain was Al-Andalus in Arabic and so these Spaniards became known as “Andalusians”. Large numbers settled in Tunisia, founding neighbourhoods and entire industries. That legacy is not abstract. Chechias, the characteristic red felt hats associated with Tunisois men, were produced using techniques brought by Andalusian refugees. By the nineteenth century, chechia makers were among the wealthiest and most influential merchants in Tunis. The Tunis souks where you can still watch them work are living archives of forced migration turned cultural inheritance. Indeed, the link with Al-Andalus is still emotionally present. Several people called me “cousin” when I told them I was Spanish. It did not feel metaphorical. It felt familial. Spanish presence resurfaces repeatedly: forts at La Goulette, inscriptions in Castilian, Andalusian refugees founding towns like Testour, where the mosque clock runs backwards (‘anticlockwise’) like Arabic script. Jewish and Muslim Spaniards built whole towns together after fleeing persecution. They brought urban planning, architecture, food and memory.

Non-human animals are also everywhere if you know where to look, silently narrating human history. Today, cats dominate Tunis, lounging, glamorous, fully at home in the city. But North Africa was once also home to another feline: lions, ultimately erased from the landscape by hunting. At the Bardo museum, Roman mosaics celebrate them while also depicting their mass slaughter in amphitheatres. Venationes (gladiatorial hunting shows) paved the way to extinction long before modern poaching. Rome’s “games” were ecological disasters disguised as entertainment. El Djem boasts the third largest amphitheatre in the world, an uncomfortable reminder that the spectacle of violence against animals became industrial. Birds, too, mark survival. Storks now nest on electrical poles, thanks to recent conservationist efforts, and the ancient castle on the artificial Chikly island in Lake Tunis is now a natural reserve for over fifty-seven species.
Water management reveals another continuity of power. Ancient Carthage was defined by water engineering. Artificial harbours, commercial and naval, remain legible after 2,200 years. Aqueducts carried water across vast distances; cisterns stored enough to sustain one of the Mediterranean’s largest cities. Fresh water was sacred. Springs, such as that at Zaghouan, were divine. Nymphs were believed to guard the source so temples rose where water emerged from the rock. But human transformations of the landscape sometimes rival natural phenomena. Chott el Djerid, now a salt desert, was once part of the Mediterranean Sea. When geological shifts cut it off, the water evaporated, leaving salt behind. The salt is now actively extracted and shipped north, sold to Scandinavian countries as grit to combat icy roads. At the same time, visions of reversing this desiccation persist, from colonial-era schemes to the revival of the “Sahara Sea” project in the 2010s, approved by the Tunisian state in 2018. Coastlines have also been shaped by humans. Hammamet’s medina once met the waves directly. Boulders and walkways intervened. Monastir’s ribat once stood on the beach before roads severed it from the sea. Sousse’s medina now violently cut away from the Mediterranean. Tunisia has never stopped imagining how to reshape water.



Just as water and animals shape human settlement, so too does climate. Again and again in Tunisia, habitation reveals extraordinary adaptation to environment. At the ancient site of Bulla Regia, houses were built partly underground to escape heat, flooding interior spaces with light while sheltering them from extremes. At Matmata, troglodyte dwellings carved into the earth have stabilised temperature in a harsh desert landscape for centuries. At Zriba Olia, a town only abandoned decades ago, Amazigh (Berber) architecture merges seamlessly with mountain rock: the house ends, the mountain begins. Even the Roman theatre at Dougga takes perfect advantage of the mountain’s elevation. These are not picturesque oddities; they are intelligent, time-tested responses to landscape. But changes aren’t always benign, especially when colonial brutality is concerned. In Carthage, Roman policy deliberately buried, erased and levelled the Punic past on Byrsa Hill. Centuries later, French authorities turned amphitheatres into chapels, erected cathedrals atop Punic acropolises and even built a farmhouse on the Roman capitol at Oudna. Layers of civilisation were literally crushed to assert dominance. The irony is that archaeology eventually resurrected what imperial ideology tried to annihilate.



Language binds all of this astonishing diversity together. Phoenician (Punic) script underpins our Latin alphabet. Tifinagh survives among Amazigh communities. Writing systems are fossils of contact. Even humour reveals linguistic layering: Tunisians seem to have the worst, and best, wordplay, producing gems like “Pub-elle”, “Bar Celone” or “Mec Anic”, jokes cleverly built on French that land perfectly in Tunisian streets. Religion, too, refuses neat boundaries. Phoenician deities merge with Egyptian, Persian and Roman gods. Judaism flourished in North Africa from antiquity and remained deeply rooted in Tunisia until the twentieth century. Christianity arrived early, fractured into multiple denominations and left basilicas, cathedrals and martyrs’ narratives across the landscape. Islam absorbed, adapted and reinterpreted what came before. Syncretism is not the exception here, it is the rule.
By the end, what remains clearest is this: Tunisia is not a palimpsest with erased layers. It is an accumulation where nothing disappears entirely. Former seas leave salt. Empires leave infrastructure. Migrations leave words, recipes, and cousins!
Sixteen days is nothing.
And it was everything.
Written by: Fernando Nieto-Almada
ABOUT THE AUTHOR

Fernando read History at university in London and Paris and currently teaches Languages. You can follow him on Instagram here.
Aquacultures & Fisheries
Small Scale Fishing in Tunisia Faces Growing Environmental and Economic Strain
For generations, fishing along Tunisia’s coast has been both livelihood and identity. From the shallow tidal flats of the Gulf of Gabès to the small ports of Sfax, Kerkennah, and Mahdia, the sea once offered a reliable rhythm. Fishermen knew the seasons, the winds, and the species that would arrive and depart each year. That knowledge shaped not only income, but family life, food traditions, and entire coastal cultures.
Today, that rhythm is breaking down. Tunisian fishermen are facing a convergence of pressures that few communities are equipped to absorb. Climate change is altering weather patterns and sea conditions faster than local knowledge can adapt. Fish stocks are declining or shifting their ranges. At the same time, destructive bottom trawling has expanded into coastal waters, undermining both ecosystems and the economic viability of small scale fishing.
Together, these forces are eroding a centuries old relationship between people and sea.

A Coast Shaped by Small Scale Fishing
Tunisia’s fishing history is deeply tied to artisanal practices. With more than 1,300 kilometres of Mediterranean coastline, the country developed one of the largest small scale fishing fleets in the region. The vast majority of Tunisian fishing vessels are small boats operating close to shore, using nets, traps, and fixed gear designed to work with coastal ecosystems rather than against them.
In places like the Kerkennah Islands, fishing traditions such as the charfia system were refined over centuries. Wooden barriers and palm fronds guided fish into enclosures using tides and seasonal movements. These methods depended on healthy seagrass meadows, predictable spawning cycles, and intact coastal habitats. They also reflected a deep understanding of ecological limits.
By the early 2000s, fishing supported tens of thousands of Tunisian families directly and many more through processing, transport, and trade. Fish was both a staple food and an important export, especially to European markets.
That balance is now under strain.
Climate Change Reaches the Docks
The Mediterranean Sea is warming faster than the global ocean average. Rising sea surface temperatures have intensified marine heatwaves, altered currents, and increased the frequency of extreme weather events. For fishermen working in small boats, these changes are not abstract trends. They translate into lost days at sea, damaged equipment, and growing danger.
Fishermen across Tunisia report longer periods of bad weather and storms that arrive with little warning. Conditions that once followed seasonal patterns are now unpredictable. Autumn and winter storms are stronger and more erratic, making it harder to plan fishing trips or ensure safe returns.
Research by international fisheries and climate bodies shows that weather related disruptions already affect fishing activity for a significant portion of the year, particularly in northern and central Tunisia. The risks are highest for artisanal fishermen, whose boats lack the size, shelter, and safety systems of industrial fleets.
In some cases, these risks have been fatal. Storm related sinkings in recent years underscore how climate change is increasing the human cost of fishing in the Mediterranean.
A Sea Rich in Life, and Increasingly Fragile
Beneath Tunisia’s coastal waters lies one of the Mediterranean’s most ecologically important regions. The Gulf of Gabès is unique due to its shallow depth and tidal range, which support vast meadows of Posidonia oceanica seagrass. These underwater forests are among the most productive ecosystems in the sea.
Posidonia meadows act as nurseries for fish, feeding grounds for invertebrates, and carbon sinks that help regulate the climate. Hundreds of marine species depend on them at some stage of their life cycle, including species of commercial importance and others already considered threatened.
Tunisia’s waters also host migratory species, sea turtles, dolphins, and endemic organisms found nowhere else. This biodiversity has long supported artisanal fishing, allowing small scale gear to yield steady catches without exhausting stocks.
However, climate change is weakening this ecological foundation. Warmer waters affect reproduction, oxygen levels, and species distribution. Some fish are migrating north or into deeper waters. Others are declining as habitats degrade.
These changes alone would challenge fishermen. Combined with destructive fishing practices, they become devastating.
The Rise of Bottom Trawling in Coastal Waters
Over the past decade, bottom trawling known locally as kys fishing has expanded dramatically along Tunisia’s coast. Using heavy nets dragged across the seabed, these vessels capture everything in their path. The method is highly efficient in the short term and highly destructive in the long term.
Bottom trawling damages seagrass meadows, disturbs sediments, releases stored carbon, and destroys the complex structures that support marine life. It also tears through the nets and traps used by artisanal fishermen, causing direct economic losses.
Although bottom trawling is regulated under Tunisian law and Mediterranean fisheries agreements, enforcement has struggled to keep pace with its spread. Legal ambiguities, limited monitoring capacity, and misclassification of vessels have allowed trawlers to operate in areas where they are restricted or banned.
In regions such as Sfax and the Gulf of Gabès, the number of kys trawlers has increased sharply since the early 2010s. Many fishermen attribute this rise to declining catches from traditional methods and economic pressure following political and social upheaval after 2011.
The result is a vicious cycle. As trawlers degrade habitats and reduce fish stocks, artisanal fishermen see their catches fall. Some abandon fishing altogether. Others feel compelled to adopt destructive methods themselves, even as they recognise the long term damage.
Economic Stakes Beyond the Shore
Fishing remains economically significant for Tunisia. Annual production reaches well over one hundred thousand tonnes, with a substantial portion exported. European markets are particularly important, making sustainability and traceability critical for trade.
Illegal and indiscriminate fishing practices threaten that relationship. International partners have raised concerns about bottom trawling and enforcement gaps, warning that continued violations could jeopardise exports and reputational standing.
Tunisian authorities have increased inspections, seizures, and surveillance in recent years, and have acknowledged both progress and limitations. With a long coastline and limited resources, oversight remains uneven.
Meanwhile, coastal communities bear the consequences first.
Lives Caught in the Middle
On the docks, the impacts are deeply personal. Fishermen speak of species that once fed families now becoming luxuries. Octopus, once affordable and common, has become scarce and expensive. Younger fishermen hesitate to invest in boats or start families, unsure whether the sea can still provide a future.
Older fishermen recall a time when knowledge of tides, winds, and seasons was enough to make a living. Today, even experience cannot offset degraded ecosystems and unpredictable conditions.
The loss is not only economic. It is cultural. As fishing becomes less viable, traditions tied to food, language, and community risk fading with it.
An Uncertain Horizon
Tunisia’s fishermen are navigating a narrow passage between climate change and industrial pressure. Protecting their future will require more than enforcement alone. It will demand rebuilding marine ecosystems, supporting small scale adaptation, and recognising that artisanal fishing is not a problem to be replaced, but a solution worth preserving.
The sea still holds life. Whether it can continue to sustain those who have depended on it for generations depends on choices made now, before the tide turns further against them.
Sources and References
Arab Reporters for Investigative Journalism. Climate Change Deepens the Struggles of Tunisia’s Fishermen, as “Kys” Trawlers Boats Steal Their Livelihoods.
Food and Agriculture Organization of the United Nations. Mediterranean fisheries assessments and Tunisia country profiles.
Intergovernmental Panel on Climate Change. Sixth Assessment Report. Mediterranean regional impacts.
Environmental Justice Foundation. Reports on bottom trawling and seafloor carbon release in Tunisia.
General Fisheries Commission for the Mediterranean. Technical regulations and Gulf of Gabès management measures.
UNEP Mediterranean Action Plan. Coastal ecosystems and climate vulnerability.
International Union for Conservation of Nature. Mediterranean biodiversity and Posidonia oceanica assessments.
Mongabay. Investigative reporting on illegal trawling and seagrass loss in the Gulf of Gabès.
Giacomo Abrusci, SEVENSEAS Media
Conservation Photography
Running Wild: The Return of Patagonia National Park’s Rheas
The Chacabuco Valley stretched wide before us. The golden steppe was broken by winding rivers, framed by snow-capped ridges that seemed to glow in the fall sun. We were in the heart of Patagonia National Park, a place reborn from what used to be one of the largest sheep ranches in Chile. Old Estancias once carved the land into squares made of barbed wire and filled with overgrazed pastures. But today, those fences are gone. The grasslands pulse with guanacos again and the park has become a symbol of what rewilding can mean when it’s done right.
We’d come here to see a beacon of rewilding in the area, which took shape as an oddly familiar looking species of bird called the Darwin’s rhea (known locally as ñandú or choique.) It’s Patagonia’s strangest survivors, this flightless animal with legs built for speed and feathers streaked in soft browns that disappear into the grass. From a distance, they look almost prehistoric, like something you might imagine darting across the steppe in a bygone epoch. Up close, they’re ecosystem engineers, spreading seeds that shape grassland health, and feed predators such as pumas and foxes that depend on them for survival.

These birds possess an unusual way of fertilizing the land, making them critical players and worth a heavy invesment in their rewilding. Unlike guanacos, which use fixed latrines (skat dropping areas) that concentrate nutrients in one spot, rheas are wanderers in every sense. As they roam, they drop seeds across the steppe in a steady scatter, with each pile of droppings carried further by rodents like tuco-tucos that burrow and churn the soil. This gives plants a chance to take root in Patagonia’s harsh winds. It’s a less prominent, yet highly fundamental cycle where rheas eat, move, fertilize, and in doing so, stitch the landscape together. Without them, the steppe would grow weaker and far less resilient.

Rheas, standing about three feet tall, are designed to vanish into Patagonia’s grasslands rather than dominate them. Rheas move almost like ghosts, disappearing into the landscape until you realize the ground itself was alive and moving all along. And yet here, in what should be one of their strongholds, rheas had nearly vanished.
Just a decade ago, a survey inside the park found fewer than 22 individuals left—a catastrophically low number for a bird so integral. The reasons were painfully manmade, as they often are when it comes to biodiversity loss like this. Decades of ranching, which ended here in 2008, had blanketed the valley in fences that trapped and killed rheas. Eggs were taken for food, chicks were chased down, and their range shrank until they were pushing just shy of a memory.

That’s where Emiliana Retamal, a young veterinarian turned wildlife ranger, comes into the conversation. She’s part of a small team with Rewilding Chile trying to bring rheas back to the Chacabuco steppe. The first thing she said upon meeting was to slow our movements, talk less, and to follow her lead when approaching these flightless wonders. We were off to the holding pens that served as a temporary home for both rhea adults and chicks, known here as charitos. Some of them were getting ready to be released into the wild, marking another historic moment for the rewilding team.
The following morning was all about getting things right. Rewilding Chile’s rhea initiative, called Ñandú Conservation and Recovery Programme, has been running since 2014. Ever since, the team has been incubating eggs, raising chicks, slowly reintroducing birds into the wild, all building toward a goal of restoring a self-sustaining population of at least 100 adults and at least four actively reproducing.

For Emiliana, release days are equal parts research, nerves, and a ton of hope. Each bird is carefully prepared, including mandatory health checks, parasite treatments, and a period of acclimatization inside open-air pens where they gain strength and learn to fend for themselves. The idea is not to domesticate them in any way, but rather, give them just enough of a head start to survive top predators, and Patagonia’s harsh winters once the pen gates swing open. Some are fitted with GPS collars—the first of their kind for monitoring rheas here—allowing the team to track their survival rates and see if they’re reproducing in the wild.
We were fortunate enough to witness this particular relase, which was a true milestone. Alongside captive-born birds, a group of 15 rheas had been translocated from Argentina for the first time. These wild individuals were specifically brought in to bolster genetics. These bird groups act quite differently, with the wild ones moving as a tighter group and demonstrating discomfort around people. That’s exactly what Emiliana wants, as the goal is to ensure the animals remember what it means to be wild or remain entirely wild to up their chances of survival.

When the moment finally came, the puesto (or field station) buzzed with controlled urgency. Emiliana and her patchwork team of rangers, vets, community leaders, and allies, moved with practiced rhythm, coaxing these powerful, awkward-looking birds into small wooden crates. These rheas were not tame, so asking them to willingly go into confinement requires a patient and steady hand. Every movement was about safety—maximizing calmness while minimizing stress, and avoiding injury for all.
Outside, a convoy of trucks rumbled to life while drones circled high above, ready to follow the release. Autumn had painted the surrounding forests in fire-reds, yellows and oranges. The air carried the kind of crispness that warned of winter’s approach. Bundled in layers, we set off across the park along a road that wound through valleys where iconic mountains dominated the horizon. The landscape begged us to stop and stare, but the mission pushed us forward. When we reached the release site, the cages were lifted down and arranged side by side. The team stood in a nervous silence. Everything was ready, so the countdown began.

On the count of three, the gates opened and the wranglers stepped back fast. For a heartbeat, not a single bird moved. Then, with a rush of feathers and legs, the rheas spilled out into the open, scattering across the grasslands like wind made visible. Some lingered, hesitating at the threshold. Others bolted in tight groups, vanishing into the tawny steppe. It certainly was not graceful, but it was emotional nonetheless. A species that had nearly disappeared from this place was running free, once again.
Releases like this may look simple. Open the gates, let the birds run, right? But the reality is far from it. Rewilding is hard work, and with rheas, it’s closer to brutal. In the wild, more than half of chicks don’t survive their first year. Eggs are eaten by predators or trampled by livestock, chicks are picked off by foxes, eagles, and pumas, and even curiosity can be fatal. Young birds often die from mistaking the wrong thing for food, like rocks or other inedible objects. And on top of that, the male birds are sometimes left caring for 50 chicks at once, making survival that much harder. Add to that the genetic bottleneck of starting with so few individuals in the wild, and every single bird that makes it into adulthood feels like a victory against impossible odds.

That’s why Emiliana and her team treat each rhea like an individual case study. Every release is followed by weeks of long days in the field monitoring and collecting data. Collars on individuals provide glimpses of survival, but much of the knowledge still comes from old-fashioned ranger work of tracking footprints across the steppe. Their job next will be to spot birds from a distance, asking local police and community members to report sightings to speed up the process.
And yet, for all the setbacks, the progress is undeniable for this team. From a ghost population of just 22 individuals to more than 70 now roaming the Chacabuco steppe, the recovery is indisputable. But numbers alone aren’t enough around here. Survival depends on genetics, and until recently, most of the birds released here had been hatched or raised in captivity. This means they were strong in body, but softer in instinct. This release however, was marking a turning point.

These 15 wild rheas translocated from Argentina to Puesto Ñandú—just a few kilometers from the border—arrived carrying what captive-bred birds could not: diverse DNA, sharper instincts, and that memory of how to live without the aid of humans. While borders divide people, they mean nothing to the animals who cross them freely. Rheas don’t recognize Chile or Argentina, but they recognize habitat. And if this recovery is to last, it will take both nations working together to protect the grasslands they share.
Even with the numbers trending upward, one of the biggest challenges is, of course, social. In nearby Cochrane, Emiliana is known casually as “the choique girl.” People are aware of the project, but they don’t always feel ownership of it. Many still see the park as something created by outsiders, disconnected from their lives. That gap is fundamental, and something the Rewilding Chile team, as well as its other collaborators including Quimán Reserve, CONAF (Chile’s National Forestry Corporation), SAG (Agriculture and Livestock Service) and Carabineros de Chile, are putting emphasis on. Rewilding efforts must be equally about saving species and building genuine relationships with communities or everything done in the field will not be effective.

Being in attendance on that release day, standing in the steppe as the cages opened and rheas burst back into a landscape that once nearly lost them, was something that will never escape our memory. The pride on the team’s faces, the outward relief after months of preparation, the sight of those birds vanishing into the golden grasslands, all felt triumphant.
As Emiliana reminded us, this is only the beginning. In the vastness of Patagonia National Park, surrounded by snow-capped ridges and rivers that once ran through sheep pastures, the work ahead is as immense as the landscape itself. Watching rheas roam free again was proof that rewilding means to restore the past, in addition to defining a new future, where ecosystems can someday thrive without our intervention.
Written by: Andi Cross
ABOUT THE AUTHOR

Andi Cross is an explorer, strategist, and extended range diver with Scuba Schools International and Scubapro, who leads Edges of Earth—a global expedition and consulting collective documenting resilience and climate solutions across the world’s most remote coastlines. Her work centers on “positive deviance”—spotlighting outliers succeeding against the odds—and using storytelling and strategy to help scale their impact.
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