All articles tagged with #marine science
A new study reveals that the longfin inshore squid possesses a diverse array of hair cells across its entire body, structurally similar to those in human ears. These cells detect water movement, offering a potential new model for understanding human hearing and deafness.
Researchers in Japan have identified a new form of marine pollution called 'plasticoral,' where plastic waste has irreversibly fused with coral rubble. This phenomenon was discovered on beaches in the Ryukyu Islands, specifically Okinawa, where spectroscopic analysis revealed household polymers melted into the microscopic pores of coral skeletons. The fusion is likely caused by beach bonfires, as ocean temperatures are currently insufficient to melt plastic. While the long-term ecological impact is unknown, previous studies suggest such plastics can leach harmful chemicals or carry pathogens to living corals.
Researchers mapped climate resilience of coral reefs and found about 166,000 square kilometers globally that can withstand warming, with hotspots in the Bahamas, Cuba, Australia, Indonesia, and the Philippines. Resilience stems from factors like upwelling cooling, favorable microbes, and the ability to rebound after bleaching, guiding targeted conservation investments such as protected areas and restoration. However, El Niño and ongoing warming threaten reefs, and protecting diversity of resilience within reefs is crucial.
Researchers aboard the R/V Falkor used environmental DNA (eDNA) to sample Cape Range and Cloates submarine canyons off Western Australia, detecting Architeuthis dux DNA and identifying 226 species across 11 groups at depths over 4 kilometers—many DNA signals don’t match known species—revealing vast, previously hidden deep-sea biodiversity.
China launches the Open-Sea Floating Island, the world’s first ultra-large, all-weather floating marine research platform designed to operate in harsh offshore conditions. The three-part system—central semi-submersible platform, ship-based laboratories, and land support—will enable deep-sea exploration, testing of mining and offshore equipment, and improved typhoon forecasting, with completion targeted for 2030 and depths up to 32,800 feet.
A study by Exeter University found that fiddler crabs in Colombia's polluted mangrove forests can break down microplastic particles within days, but this may release harmful nanoplastics into their tissues and the food chain, raising concerns about pollution adaptation and environmental impact.
A recent study using clam shell growth rings confirms that climate change is disrupting the North Atlantic subpolar gyre, a key ocean current system, which could lead to significant regional and global climate impacts, including more extreme weather, sea level rise, and shifts in ocean heat transport, signaling potential irreversible tipping points in Earth's climate systems.
The Great Barrier Reef has suffered significant coral loss due to extreme heat, cyclones, and flooding, with some areas losing over a third of their coral cover. The Australian Institute of Marine Science reports that climate change-driven heat stress is the primary cause, exacerbated by cyclones and freshwater flooding. The mass bleaching event is part of a global trend linked to rising ocean temperatures from fossil fuel emissions. Conservationists warn that the reef's resilience is nearing its limits, urging significant emissions reductions and a halt to new fossil fuel projects.
Scientists in Australia are breeding "super corals" in an effort to help the Great Barrier Reef withstand the effects of climate change. By selectively breeding corals that can tolerate extreme heat better, they hope to buy time for the reefs to adapt. However, many coral biologists caution that breeding "super corals" is not a long-term solution and emphasize the urgent need to address climate change by reducing greenhouse gas emissions.
Scientists have gained rare access to the development of hammerhead shark embryos, shedding light on the mystery of their unique heads. Unlike most shark species, hammerheads gestate their pups in utero, with up to 16 embryos nourished by umbilical cords before live birth. By salvaging embryos from deceased adult female sharks, researchers were able to document the entire set of developmental stages, creating a visual growth chart and uncovering insights into the evolution of these peculiar sharks.
Scientists have observed a lone Orca, named Starboard, attacking and killing a great white shark in South Africa, marking the first documented instance of such behavior in the region. The orca swiftly killed the shark and consumed its liver, a behavior that has raised concerns among scientists about potential disruptions in the balance of apex predators in the ocean, possibly due to human activities such as climate change and industrial fishing. The incidents of orcas preying on great white sharks appear to be increasing, posing potential threats to other species in the marine ecosystem.
A groundbreaking video captured a lone orca hunting and killing a great white shark off the coast of South Africa in just two minutes, a behavior previously unseen. The orca swiftly eviscerated the shark and consumed its liver, suggesting a potential driving force behind the sharks' absence in certain areas. The footage provides valuable insights into orcas' predatory behavior and their selective feeding habits, shedding light on their impact on the marine ecosystem.
New footage captures a lone orca hunting and consuming a great white shark in just 2 minutes, marking the first record of a single orca killing a great white without the help of its podmates. The incident, which took place off the coast of South Africa, has led great whites to abandon a popular hunting ground due to orca predation. Scientists speculate that orcas target sharks' fatty livers due to their high nutritional value, and this behavior could have important conservation implications for shark species already facing man-made pressures.
Scientists have discovered a unique feature in the voice boxes of whales, which allows them to produce loud songs that travel through the ocean. This discovery, based on lab experiments with the voice boxes of three baleen whales, suggests that whales have adapted their voice boxes over millions of years to make sounds underwater. The study, published in the journal Nature, sheds light on how whales communicate and may direct future research in this field. The findings also highlight the potential impact of human-generated noise, such as shipping industry, on whales' ability to communicate and mate.
The world's first photo of a newborn great white shark in the wild has been released, providing new insight into where these sharks give birth. The photo, taken off the coast of Santa Barbara, California, shows a five-foot-long, completely white newborn shedding an 'embryonic layer.' Experts believe this sheds light on the early development of great white sharks and challenges previous notions about where they give birth, suggesting it may be in shallower waters than previously thought.