مقالات البيئة

A shark that walks in water instead of swimming might sound like a creature straight out of a science fiction thriller. However, that is precisely how the four new species of the fish — found in the tropical waters of the Indo-Australian archipelago — move across the seafloor. The unique ocean dwellers were discovered by a team of scientists, led by Dr. Christine Dudgeon from Australia's University of Queensland, during a 12-year global conservation study....

If you have felt the skies above you seem increasingly empty of chirping birds, you are not alone. A 2018 study by BirdLife International revealed that 40 percent of the world’s 11,000 bird species are in decline, and one in eight bird species is threatened with global extinction. Now, some scientists are using cutting-edge technology to revive the critically-endangered kākāpō; if successful, the techniques used may help save other bird species as well....

Though bushfires are a common occurrence in Australia during the summer, they have never been as devastating or as widespread as the ones currently burning across the country. Since September 2019, the blazes, fueled by dry foliage and strong winds, have scorched over 15.6 million acres (24,000 square miles) — an area larger than the state of West Virginia. Even worse, officials warn that Australia's wildfire season — which generally lasts through March — is nowhere near its end....

With no brains or nerve cells, single-cellular microorganisms are often regarded to be simple, primitive beings with few capabilities. However, a new Harvard University study suggests that protozoans, like Stentor roeselii, have the smarts to make "complex" decisions when confronted with unpleasant situations....

It is often said that "a picture is worth a thousand words." That is certainly true of the mesmerizing images of fleeting moments of nature submitted by international ecologists and students for the British Ecological Society's (BES) annual photography competition. Here are a few of 2019's winning entries, announced on November 28, 2019....

Endemic to the forests of south and southeast Asia, the silver-backed chevrotain, or Vietnamese mouse-deer, is one of the world's most elusive animals. The rabbit-sized critter is only known to science through five specimens, four of which were recorded by researchers in 1910. The fifth was killed by a hunter and donated to scientists in 1990. Since then, there have been no recorded sightings of the animals, leading many to fear they had gone extinct. Now, thanks to the efforts and persistence of a team led by biologist Andrew Tilker, the species has not only been rediscovered but also photographed in the wild for the first time!...

Most male birds try to attract mates with elegant gestures. Seabirds bob their heads and flutter their wings, while peacocks fan out their beautiful feathers. However, the white bellbird, endemic to the Amazon rainforest in Brazil, dispenses with the pleasantries and cut to the chase by shrieking in its prospective "date's" face at a deafening 125 decibels (Db)— the loudest bird call ever recorded. To put it in perspective, that is 40 Db higher than the safe hearing range for humans! Prior to this, the honor belonged to another Amazon-dweller — the aptly-named screaming piha — which has a peak recorded "song" volume of 116 Db....

Humpback whales spend summers feeding in the cold Arctic and Antarctic waters and then migrate to tropical waters during the winters to breed and give birth. Since they don't eat at all during this time, the mammals have to ensure they have enough fat reserves to feed their calves and to sustain themselves. To optimize their prey consumption, humpback whales often create circular "nets" with bubbles exhaled from their blowholes. Now, for the first time, researchers have captured detailed footage of the so-called bubble-net fishing technique from the whale’s point of view along with, an aerial video....

In 1893, Arctic explorer Fridtjof Nansen deliberately lodged his wooden ship in the sea ice north of Siberia, hoping that its natural drift would take him to the North Pole. Though the Norwegian scientist failed to reach his desired destination, his three-year-long, 2,000-kilometer journey into the North Atlantic Ocean revealed important data about the then-mysterious Arctic Ocean. Now, an international team of researchers have embarked on a similar journey for a groundbreaking climate change study of the Arctic....

Boyan Slat has been dreaming of cleaning up the world's oceans ever since he was a teenager. On October 2, 2019, the now 25-year-old announced that System 001/B, an autonomous retrieval system developed by his non-profit Ocean Cleanup, had successfully trapped plastic debris floating in the Great Pacific Garbage Patch. Located between Hawaii and California, the approximately 617,763 square-mile mass of waste is the largest accumulation of ocean plastic in the world....

The Masai Mara Reserve is one of Kenya's most popular tourist attractions. Every year, thousands of people flock to the national park to glimpse of a variety of wild animals, such as lions and cheetahs, or to witness the majestic annual migration of over 1.5 million wildebeests to and from neighboring Tanzania. However, this September's human "stampede" is due to an unexpected animal — a zebra foal with polka dots!...

Shipworms, which munch through wood and help release essential nutrient stored within it, are incredibly beneficial for other marine animals. However, the saltwater bivalve mollusks have been known to sink boats and cause extensive damage to docks, piers, and other wooden structures. Now, researchers have uncovered a shipworm species of a different kind — one that has the potential to change the course of a river by gnawing through its limestone bedrock!...

Princess Louisa Inlet, a fjord located 60 miles from Vancouver, Canada, is a spectacular stretch of remote wilderness. Accessible only by boat or plane, the 3.7-mile-long (6-kilometers) area is popular with outdoor enthusiasts who flock to admire the 120-foot-high Chatterbox Falls or to hike the numerous trails to other scenic features. Its dense forests are home to a wide variety of wildlife, including grizzly bears, mountain goats, and eagles. Now, thanks to an unprecedented crowdfunding campaign, the pristine land will be preserved forever for future generations to enjoy....

Bees are essential for the pollination of flowers, fruits, and vegetables. Sadly, over the past 15 years, the global population of the industrious insects has been declining at alarming rates. Bee Informed Partnership, a collaboration of American insect experts, estimates that between April 1, 2018, and April 1, 2019, the country's managed bee population decreased by 40.7 percent. The numbers are as dire worldwide. Now, some cities in the Netherlands are coming up with innovative ideas to help stem the population decline of these all-important insects....

Australia’s Great Barrier Reef, home to over 1,500 fish species and countless other marine animals, is in trouble. Rising ocean temperatures, attributed to climate change, have destroyed about half of its coral since 1998. On August 30, 2019, the Great Barrier Reef Marine Park Authority downgraded the ecosystem's condition from "poor" to "very poor" and warned that the window of opportunity to save it was rapidly closing. Now, some scientists are hoping that a gigantic piece of pumice stone currently floating towards Australia will aid in the recovery of the world's largest coral reef system....

The Atlantic hurricane season, which spans from June 1 to November 30, had been relatively calm this year, with just one major storm in July. That changed at the end of August, when Dorian, a Category 5 hurricane, came screaming through, leaving a trail of destruction all the way from the US Virgin Islands to the Bahamas and the US and Canadian east coasts....

When Leigh Love stumbled upon a bird's leg bone at the Waipara Greensand fossil site in New Zealand's South Island in 2018, he suspected that they might be those of an ancient penguin. With four other species discovered there, the area has been a hotbed for penguin remains from the Paleocene Epoch, which spanned between 66 million and 55 million years ago. What the amateur paleontologist did not realize was that the fossil belonged to the largest, hitherto unknown, penguin species ever found....

It is not uncommon for human-generated blazes — lit to clear the land out for farming or ranching — in the Amazon rainforest to get out of control. However, this year, the number of wildfires has been extraordinarily high. Brazil's National Institute for Space Research (INPE) has recorded over 73,000 fires in the world's largest tropical rainforest between January and August 2019, 2,500 of which are currently active. This is the highest number observed since the agency began keeping records in 2013, and an astounding 80 percent more than during the first eight months of 2018....

It is common knowledge that the droplets spread from sneezing are one of the key culprits responsible for transmitting infectious diseases between humans. Now it turns out that some plants have a similar ability to share the "love" and spread pathogens to each other. However, while sneezing in humans is an involuntary response to irritants along the lining of the nose, plants "sneeze" due to a quirk in fluid dynamics....

Japan, the host country of the 2020 Olympic and Paralympic Games, has promised to deliver "the most innovative Games ever organized." On July 24, 2019, a year before the competition begins in Tokyo on July 24, 2020, the Olympic Committee unveiled its first ingenious idea — medals made using precious metals extracted from discarded electronics....

BBC Earth host Lizzie Daly and underwater photographer Dan Abbott released several videos of exciting encounters with marine animals off the English coast from July 7 to July 13, 2019. The pair swam alongside gray seals off the coast of Northumberland, minke whales off the northwest coast of Scotland, and seabirds near Wales. However, the highlight came on the final day of the tour, when the underwater adventurers stumbled upon a massive barrel jellyfish off the coast of Falmouth, Cornwall. The sighting of the mesmerizing animal was a fitting way to end Daly's "Wild Ocean Week" campaign to raise ocean awareness and funds for the UK's Marine Conservation Society....

Since late March 2019, local fishers and sightseers on whale watching excursions along the Southern California Coast have been treated to a rare sight — dozens of school bus-sized basking sharks lumbering through the water. This is the first time the "gentle giants of the sea" have frequented the area in such large numbers in over thirty years....

After conquering the roads, Uber, the peer-to-peer ridesharing service, now has its eyes set underwater. On May 24, 2019 the American company launched scUber, “the world’s first ride-share submarine experience," which will take tourists on a memorable journey across the world's most extensive coral system — Australia's Great Barrier Reef....

Mention the word spy, and the images that come to mind are those of secretive, stealthy fictional characters like British Secret Service agent James Bond and former CIA assassin Jason Bourne. However, the alleged Russian mole, who recently "defected" to Norway, fits none of those descriptions. In fact, it is not even a person, but a friendly Beluga whale who loves to interact with humans!...