Wednesday, July 2, 2025

Polaris of Enlightenment

Pepparholm: “The Nordic region’s largest biological laboratory”

Published 19 January 2025
– By Editorial Staff
The European green toad (Bufotes viridis) has settled on Pepparholm.
3 minute read

On the artificial island of Pepparholm, plant and animal life thrive without any human interference. Since the island was created during the construction of the Öresund Bridge in 1999, hundreds of plant species and several animal species have been found, and new species are still being discovered.

The Öresund Bridge, also known as the Öresund Link, was inaugurated on July 1, 2000, and spans 15.9 kilometers between Malmö and Copenhagen, both above and below the Öresund Strait via a tunnel.

The original plan for the link was to build it along Saltholm Island. However, this would have required either building the bridge straight across the island or expanding the island. However, due to the risk of disturbing the island’s wildlife, the plan was abandoned and the decision was made to build an artificial island south of Saltholm instead.

Pepparholm, in Danish Peberholm, was designed by bridge and landscape architect Inger Berglund from Falun and built between 1995 and 1999. The island got its name from a naming competition in the Danish newspaper Politiken.

The bridge construction faced opposition from various quarters, including arguments that it would disrupt the natural flow of water. Saltwater, being heavier than freshwater, flows more effectively in deeper areas. However, Pepparholm was built in a shallow area that did not affect the water flow, and Öresund was further deepened to improve the existing water flow. The excavated material was then used to construct the island.

“The largest biological laboratory in the Nordic countries”

The tunnel to Copenhagen starts at Pepparholm, where both a railway and a highway pass through the island. However, no trains stop on the island, and the highway exit can only be used by people with special permission. Only biologists and staff from the Öresund Bridge are allowed to visit the island, which has thus remained untouched by human activity since its creation.

Pepparholm, together with Saltholm and the surrounding sea, is part of Natura 2000 site 142. Natura 2000 is a network of valuable natural areas within the EU with species and habitats that are considered particularly worthy of protection from a European perspective. Because nature on Pepparholm has been allowed to develop without human interference or conservation, the island is also seen as an experiment and has been called “the Nordic region’s largest biological laboratory”.

Unusual species

Pepparholm today has a rich plant and animal life with hundreds of plant species and a large number of animal species identified on the island.

Marschall’s wallflower (Erysimum marschallianum) and early marsh orchid (Dactylorhiza incarnata). Montage. Photo: Aleksej Yabs, Ivar Leidus/CC BY-SA 3.0

Several rare species have also been discovered on Pepparholm. For example, the wild and protected early marsh orchid thrives in colonies on the island, having first been found in 2004. In 2007, the plants true salad burnet (Poterium sanguisorba), creeping willow, pale toadflax and Siberian iris were identified. In total, the island is estimated to harbor around 600 plant species, according to Natursidan. Another unusual discovery is the plant Marschall’s wallflower (Erysimum marschallianum), which is not found in either Sweden or Denmark, but is believed to have arrived by train from Finland, according to the state broadcaster SVT.

In 2010, a hare was discovered on the island, believed to have made its way there over the ice. Five years later, white rabbits were found, which it is suspected may have been released from a car. Grey herons, western marsh harriers and peregrine falcons also nest on Pepparholm, which is also popular with other bird species. In total, around 40 different species nest on the island.

The rare European green toad was discovered on the island in 2005. The species is otherwise only found in a few places in Denmark and along the west coast of Scania. A large number of insect species have also been identified, including over 300 beetle species and more than 400 butterfly species. Even the rare and poisonous hobo spider has been found at Pepparholm.

Eurasian spoonbill (Platalea leucorodia). Photo: Andreas Trepte/CC BY-SA 2.5

New species discovered every year

Every year, biologists and botanists survey Pepparholm and new species continue to be discovered. In 2023, it was noted that a colony of spoonbills had begun to move in the area, as reported by Natursidan. The following year, in 2024, the grasshopper species Aiolopus thalassinus was identified, which is completely new to Denmark. In addition, the rare plant species of hawkweed and denseflower mullein were found during the same period.

The Öresund Bridge, also called the Öresund Link, is a combined rail and road connection between Malmö, Sweden, and Copenhagen, Denmark, spanning 15.9 kilometers. It includes a cable-stayed bridge, a tunnel, and the artificial island Pepparholm, created to facilitate the transition between the bridge and tunnel. Construction began in 1995 and was completed in 2000 at an estimated cost of €4 billion. Officially opened on July 1, 2000, the bridge is considered an engineering marvel, with its dual design of bridge and tunnel allowing it to navigate the busy Öresund Strait without disrupting marine traffic. It has since become a vital infrastructure for travel and commerce between the two countries.

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Peace activist urges NATO–Russia cooperation over toxic munitions on Baltic Sea floor

The new cold war

Published yesterday 12:09
– By Editorial Staff
Approximately 40 tons of hazardous chemical warfare agents lie scattered on the bottom of the Baltic Sea, according to experts.
2 minute read

An estimated 1.6 million tons of World War II ammunition still lies at the bottom of the North Sea and Baltic Sea.

According to experts, this not only poses a security threat but also a growing environmental risk – and removal should be done through international cooperation rather than individual initiatives.

The majority of the ammunition, primarily left behind by Nazi Germany, consists of conventional shells. However, about 40 tons contain dangerous chemical warfare agents, including mustard gas and phosgene. After decades underwater, many of the containers have begun to corrode, posing a threat to the marine ecosystem and potentially to coastal areas.

– The question was how to deal with the recovery of these poison time bombs for the biosphere of the Baltic Sea. Of course, due to the corrosion of these vessels, there is a danger for the fish and the plants, and other countries, says German publicist and peace activist Bernhard Trautvetter in an interview with RT.

He emphasizes that the responsibility cannot lie with a single country and that NATO countries in the Baltic region, as well as Russia, which has access to these waters through its exclave of Kaliningrad and the St. Petersburg area, must join forces to “pull this time bomb out of the world”.

German pilot project

Germany launched a pilot project in 2023 to salvage the ammunition, conducting work in the Bay of Lübeck, with the first phase completed in April this year. The authorities described the project as a success but acknowledged that further technical adaptations are needed in areas where ammunition concentrations are particularly high.

The initiative has simultaneously raised concerns among environmental organizations, researchers, and neighboring countries about how the recovery affects the marine environment, especially if conducted without cross-border coordination.

Russia has long expressed concern about the chemical legacy of the war and has repeatedly called for an international effort to clear the seabed of war materials. In practice, however, Russia has been kept out of the efforts made so far, largely due to the deteriorated security situation and the frosty relationship with the West following the initiation of the war in Ukraine.

EU classifies mink as invasive

Biodiversity

Published 25 June 2025
– By Editorial Staff
Minks threaten biodiversity by preying on birds, amphibians and small mammals, causing great damage to sensitive ecosystems.
2 minute read

The EU’s list of invasive alien species has been updated – mink is now included. However, Finland plans to apply for an exemption to continue fur farming.

The European Union has updated its list of alien species that threaten biodiversity. The species on the list are banned from being imported, sold, bred, cultivated or used within the EU. One of the most notable new additions is the mink – a decision that is causing concern in the Finnish fur industry, which has been heavily criticised in many quarters.

Invasive species are animals and plants that spread to new areas and cause ecological imbalance. They can outcompete native species and cause significant damage to ecosystems. The EU list is intended as a tool to limit their spread and protect biodiversity.

The inclusion of mink in the ban could deal a severe blow to Finland’s controversial fur farms, but Finland hopes to obtain an exemption, as it did in 2017 when the raccoon dog was added to the list.

– The assessment is that Finland is likely to be granted an exemption, says Karin Cederlöf, government secretary at the Ministry of Agriculture and Forestry.

North American beaver displacing European variety

If the exemption is approved, mink farming could continue in the country, but under stricter safety requirements. However, no new farms would be allowed to be established.

Finland is now preparing an official request to the EU for an exemption for mink. The government and parliament have given the go-ahead, and work will start immediately after the summer break.

In addition to mink, the North American beaver has also been added to the list. Finland has already taken measures to reduce the spread of the disease in order to protect the endangered European beaver. These efforts will now be further intensified, according to Cederlöf.

Several new bird and fish species as well as plants are also covered by the rules. Among mammals, in addition to mink, sika deer is also among the newly added species.

The EU’s work against invasive species is usually described as a central part of the Union’s environmental strategy, and the list is updated regularly as new threats are identified. For Finland, the decisions represent a delicate balance between nature conservation and economic interests – and the exemption for mink could be decisive for the future of the fur industry.

Chimpanzees caught on camera sharing alcoholic fruit

Published 14 June 2025
– By Editorial Staff
2 minute read

For the first time, wild chimpanzees have been documented eating and sharing fruit containing alcohol. The research team speculates that this behavior could be described as an early evolutionary stage of “feasting”.

Researchers from the University of Exeter in England set up ten separate cameras with motion sensors in a national park in Guinea-Bissau in West Africa. There, they captured chimpanzees sharing the fermented fruit Treculia africana. The fruit contained an alcohol content of up to 0.61 percent. The behavior raises questions about whether and why chimpanzees consciously seek out alcohol.

– For humans, we know that drinking alcohol leads to a release of dopamine and endorphins, and resulting feelings of happiness and relaxation, said Anna Bowland, one of the researchers behind the study, in a press release, continuing:

We also know that sharing alcohol – including through traditions such as feasting – helps to form and strengthen social bonds. So – now we know that wild chimpanzees are eating and sharing ethanolic fruits – the question is: could they be getting similar benefits?

The amount observed is probably not enough to get the chimpanzees drunk, but the researchers estimate that the filmed episodes only provide a small glimpse into how much fermented fruit the animals eat in a day, as their diet consists of 60-85 percent fruit.

Researchers believe that more research is needed into why chimpanzees eat fermented fruit together, but speculate that the behavior may represent an early evolutionary stage of “feasting”.

Chimps don’t share food all the time, so this behaviour with fermented fruit might be important, says Dr. Kimberley Hockings of the University of Exeter. “If so, it suggests the human tradition of feasting may have its origins deep in our evolutionary history”.

Bats “surf” the winds to power their migration

Published 7 June 2025
– By Editorial Staff
2 minute read

Bats use the warm fronts of storms to “surf” as they migrate, research shows. This way, they use less energy and can fly longer distances.

The greater noctule bat is Sweden’s largest bat species, with a wingspan of 30 to 45 centimeters. The species also lives in Finland. Like birds, bats migrate thousands of kilometers annually across North America, Europe, and Africa. Now, researchers from the Max Planck Institute of Animal Behavior (MPI-AB) have studied 71 greater noctule bats during their approximately 1,600-kilometer-long spring migration across the European continent. Using sensors, the researchers were able to measure the bats’ activity levels as well as the air temperatures in which they were flying.

The researchers discovered that the bats often paused during their flights but could travel as far as 400 kilometers in a single night breaking the previous distance record for the species. The bats interrupted their migration flights with frequent stops, likely because they needed to feed continuously.

– Unlike migratory birds, bats don’t gain weight in preparation for migration, explains Dina Dechmann of MPI-AB, one of the authors of the study, in a press release. They need to refuel every night, so their migration has a hopping pattern rather than a straight shot.

Furthermore, an interesting pattern emerged in the bats’ migration. On some nights, more bats chose to fly than on others, which turned out to be weather-dependent. The bats began flying on nights when air pressure dropped and temperatures rose in other words, when storms were approaching. The sensors on the transmitters measuring activity levels also showed that the bats used less energy when flying on these warm, windy nights. After further analysis, it became clear that the bats were using the warm winds during storms to “surf”.

– They were riding storm fronts, using the support of warm tailwinds, says Edward Hurme, a researcher at MPI-AB. It was known that birds use wind support during migration, and now we see that bats do too.

The results of the study are important for the survival of bats, say researchers. Migrating bats are threatened by human activities, especially wind turbines which cause many collisions. Knowing where and when bats migrate can help prevent deaths.

– We can be stewards of bats, helping wind farms to turn off their turbines on nights when bats are streaming through, says Hurme.

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