Fishers and poachers along the Black Sea coast often find suffocated dolphins entangled in their nets,
asserted
dolphins → find → nets
They release them by cutting off their fins and dropping them in the sea.
asserted
They → release → sea
Their bodies, with net marks on their skin, are often washed ashore.
asserted
bodies → wash → skin
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asserted
Russia → kill → Africa
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Fishing and poaching in littoral Black Sea nations plummeted because of Russia’s 2022 full-scale invasion, as Moscow strove to occupy all of Ukraine’s Black Sea coast.
asserted
Moscow → recruit → coast
It failed – but the ongoing hostilities have been killing “hundreds times more” bottlenose and short-beaked dolphins and harbour porpoises, according to Ivan Rusev, head researcher at the Tuzly Lagoons national park in southern Ukraine.
uncertain
hostilities → fail → Ukraine
In 2022 alone, some 50,000 dolphins died this way, and by 2026, the number exceeded 120,000, or one in four cetaceans in the Black Sea
asserted
number → die → Sea
, Rusev told Al Jazeera.
asserted
Rusev → tell → Jazeera
Dolphins are apex predators, and their decimation further ruins the Black Sea’s ecosystem already affected by chemicals from munitions, spills of oil, fuel and vegetable oils from dozens of sunk or damaged warships, tankers and freighters.
asserted
decimation → ruin → warships
Many dead dolphins still have their fins, but look starved.
asserted
dolphins → have → fins
Explosions, launches of cruise missiles from warships, and military sonar systems confuse them, deafening their primary survival tool, echolocation, and making them unable to navigate, communicate and hunt.
“If a dolphin can’t fish, it loses weight fast,” said Rusev, whose park covers 280 square kilometres (108 square miles) of salty lagoons that serve as a stopover and breeding site for migratory birds.
asserted
that → confuse → birds
The dolphins switch to consuming their blubber that has already accumulated pollutants from wastewater, agricultural runoff, microplastics and antibiotics.
asserted
that → switch → microplastics
The self-poisoning incapacitates their immune system, and they succumb to lethal respiratory tract infections caused by the so-called morbillivirus.
asserted
they → poison → morbillivirus
The Black Sea is one of the world’s youngest – some scholars hypothesise that it was a freshwater lake until about eight millennia ago, when the Bosporus Strait burst open, causing what may have been the biblical Great Flood.
uncertain
what → hypothesise → youngest
The sea’s waters lack oxygen and support no fauna or flora below 50 to 100 metres.
asserted
waters → lack → metres
The chronic environmental damage from the war was aggravated by another shock: the 2023 destruction of the giant Kakhovka dam on the Dnipro River, releasing most of its 18 cubic kilometres (4.3 cubic miles) of water contaminated with fertiliser runoff, heavy metals and machine oil.
asserted
damage → aggravate → runoff
Fish species such as mullet and bluefish have become scarce, even though fishing in Black Sea nations has been affected by restrictions, bans and naval mines that were spotted near Istanbul.
The changes inevitably affect the dolphins.
“With dolphins at the top of the food chain, everything from zooplankton to fish reaches them,” Rusev said.
asserted
Rusev → become → them
Environmentalists from other Black Sea nations – Bulgaria, Romania, Turkiye – also reported a spike in dolphin deaths, even though the cause of their death couldn’t always be established.
“Most of the stranded dead cetaceans are usually in an advanced state of decomposition, making detection of net marks and other marks almost impossible,” Dimitar Popov of Green Balkans, Bulgaria’s oldest nature conservation group, told Al Jazeera.
asserted
Popov → report → Jazeera
He agrees with Rusev that “sonar systems of warships and submarines definitely affect cetaceans and their echolocation and hearing abilities”.
asserted
systems → agree → cetaceans
Meanwhile, Russian environmental monitors blamed the dolphin deaths on “parasites” and “virus infections” without any further explanation.
asserted
monitors → blame → explanation
And even though only a tiny percentage of dead dolphins are washed ashore, their appearance horrifies Ukrainians already unnerved by nearly daily drone and missile attacks.
asserted
appearance → wash → attacks
In August, Tetiana Smolchenko enjoyed a seaside stroll with her eight-year-old son Oleh in the southern city of Odesa – until the child spotted an emaciated, decaying dolphin.
asserted
child → enjoy → dolphin
“I nearly threw up,” the 33-year-old, whose husband serves in the military and whose apartment building has been damaged by a Russian drone twice, told Al Jazeera.
asserted
building → throw → Jazeera
“We’re so used to human deaths now, but seeing these creatures die because of the war is no less horrifying,” she said.
asserted
she → ’re → war
“We both wept.”
asserted
We → weep → ?
What looks like a military triumph could become a heavy blow to the marine ecosystem.
uncertain
looks → look → ecosystem
Since 2022, Ukrainian sea and airborne drones have sunk two submarines and three dozen Russian warships, including the Black Sea Fleet’s flagship, the Moskva (Moscow) guided missile cruiser.
asserted
drones → sink → flagship
They were all loaded with toxic fuel and other chemicals.
asserted
They → load → fuel
Even though Ukrainian drone operators attacking Russian “shadow fleet” tankers are instructed to specifically target their engines, oil and fuel spills continue to happen.
asserted
spills → attack → engines
Oil molecules form a film that coats seaweed, poisoning molluscs and fish, especially sturgeons that die in droves.
asserted
that → form → droves
Every explosion deafens and kills fish, and the sound, coupled with flying drones, startles birds migrating back and forth between Northern Europe and the Middle East.
asserted
sound → deafen → Europe
“And when a bird can’t find enough food, doesn’t have ‘fuel,’ it can’t reach the destination where it winters or nests,” Rusev said.
asserted
Rusev → find → destination
“It will affect the number of certain bird populations for years.”
asserted
It → affect → years
Startled by the blasts, flamingoes, who only started nesting in his park years ago,
asserted
who → startle → park
are leaving their hatches, and seagulls immediately eat the eggs, he said.
asserted
he → leave → eggs
The war’s only silver lining for wild nature around the sea is that the number of boars, roes, foxes, jackals, hares and badgers has risen because hunting and poaching nearly stopped, he said.
asserted
he → rise → boars
And the ecosystem’s post-war recovery is going to be uneven.
asserted
recovery → go → ?
While the number of insects and small mammals should return to normal within years, the dolphin population’s recovery will take decades.
asserted
recovery → return → decades
“We estimate that it would take 30 to 50 years to renew the population of cetaceans, so that the sea ecosystem becomes more or less normal,” Rusev said.
asserted
Rusev → estimate → cetaceans
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