科学者チームが、西オーストラリア沖の深海峡において、ダイオウイカをはじめとする数百種の生物の痕跡を発見した。この成果は、環境DNA分析を用いて水深4キロメートルを超える深海を調査した遠征調査によってもたらされた。
カーティン大学の研究者らは、シュミット海洋研究所の調査船「R/V Falkor」に乗り込み、本研究を主導した。研究チームは、パースから北へ約1,200キロメートル離れたニンガルー海岸近くのケープ・レンジおよびクローツ峡谷から、1,000を超える水サンプルを採取した。分析の結果、11の動物グループにわたる226種が特定され、その中には西オーストラリア海域ではこれまで記録されていなかった種も複数含まれていた。
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A mother-and-daughter duo of citizen scientists has uncovered the largest known coral colony on Australia's Great Barrier Reef, measuring 111 meters across and covering nearly 4,000 square meters. The J-shaped formation of Pavona clavus was found during a dive as part of the Great Reef Census initiative. Advanced 3D modeling confirmed its size, highlighting the role of community involvement in marine conservation.
Researchers at the Okinawa Institute of Science and Technology have revealed how squid and cuttlefish survived the Cretaceous-Paleogene mass extinction by retreating to oxygen-rich deep-sea refuges. Their analysis of newly sequenced genomes shows these cephalopods originated in the deep ocean over 100 million years ago, followed by rapid diversification into shallow waters. The findings, published in Nature Ecology & Evolution, provide the first comprehensive evolutionary tree for decapodiform cephalopods.
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Researchers have uncovered evidence that octopuses from the Late Cretaceous period, around 100 million years ago, grew to lengths of nearly 20 meters and hunted as top predators. The findings, based on well-preserved fossil jaws from Japan and Vancouver Island, challenge previous views of early octopus evolution. Professor Yasuhiro Iba of Hokkaido University led the study, published in Science on April 23.
Researchers from Australia and New Zealand have discovered fossils from 16 species, including a new ancestor of the kākāpō parrot, in a cave near Waitomo on the North Island. The remains, dating back about one million years, reveal waves of extinction driven by volcanic eruptions and climate shifts long before human arrival. The find fills a major gap in the country's fossil record.
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Scientists have determined that structures once seen as traces of tiny animals in 540-million-year-old Brazilian rocks are actually fossilized communities of bacteria and algae. The reexamination uses advanced imaging to reveal preserved cells and organic material.
Researchers have found that Borneo's fanged frogs, long considered a single species, actually comprise several distinct genetic groups. Genetic analysis suggests around six or seven species rather than the up to 18 previously proposed. This discovery highlights the challenges in defining species boundaries for conservation efforts.
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A team of international researchers has accused the US government of hastening the collapse of coral reefs around Guam through military expansions and proposed rollbacks to the Endangered Species Act. In a letter published in Science this month, they highlight how national security priorities are overriding conservation efforts. Without changes, these reefs face functional extinction similar to those in Florida.