Reservoirs are widely recognized as important sites for carbon burial, but their true potential as climate regulators has remained partially understood. A new study from Guizhou University published in Carbon Research provides a mechanistic explanation for why reservoirs in karst landscapes—regions formed from soluble rocks like limestone—are exceptionally effective carbon sinks. By tracing the journey of carbon from water to sediment, the research demonstrates that these unique ecosystems not only capture vast amounts of carbon but also lock it away in a highly stable, long-lasting form.

The investigation centered on the Songbaishan Reservoir in China, a typical system within a karst basin. These regions are characterized by water rich in dissolved inorganic carbon from rock weathering, which provides a key ingredient for aquatic photosynthesis. The research team, led by corresponding author Wanfa Wang, employed a sophisticated suite of analytical techniques, including stable isotope tracing, organic carbon fractionation, and high-resolution mass spectrometry, to build a complete picture of the reservoir's carbon cycle. This allowed them to quantify how much carbon was produced internally versus washed in from land and to determine its ultimate fate in the sediment.

The Karst Advantage

A central finding is the powerful role of the biological carbon pump (BCP), a process where phytoplankton convert dissolved carbon into organic matter. During the warm season, the reservoir's water column becomes thermally stratified, creating ideal conditions for algal blooms in the sunlit upper layer. This supercharged BCP consumes enormous amounts of dissolved inorganic carbon, generating a massive pool of autochthonous organic carbon (AOC)—carbon produced within the reservoir itself. This internal production supports a remarkably high organic carbon burial rate of 89.5 g C m⁻² a⁻¹, significantly higher than rates in many non-karst reservoirs.

Well-preserved archaeological bone samples have different microbial communities than heavily degraded bone samples, providing a new understanding of how microbes contribute to bone degradation, according to a study published May 27, 2026 in the open-access journal PLOS One by Damla Kaptan from the University of Stavanger, Norway, and colleagues. This study combines detailed analyses of archaeological bone degradation with analyses of microbiome diversity, providing new insights into how microbes may contribute to long-term bone preservation and decay.

A fossil bird named Plumadraco-- "feathered dragon"-- has some of the longest tail feathers ever found in a fossil bird. Its fancy feathers indicate that it was part of the long tradition, which continues to today, of birds evolving elaborate decorations to impress mates.

A recently discovered extinct bird from the early Cretaceous Period (approximately 121 million years ago) may have waggled its long tail feathers to attract mates, according to a study published May 27, 2026 in the open-access journal PLOS One by Alexander Clark of the University of Chicago, US, and colleagues.

A recently discovered extinct bird from the early Cretaceous Period (approximately 121 million years ago) may have waggled its long tail feathers to attract mates, according to a study published May 27, 2026 in the open-access journal PLOS One by Alexander Clark of the University of Chicago, US, and colleagues.

Project RattleCam, a collaboration between Cal Poly and Dickinson College, recently launched its third livestream installation at an undisclosed, remote location in Pennsylvania on May 18. The new channel, now live through early fall, operates 24 hours a day, with night-vision cameras capable of capturing the activities of snakes and other creatures that enter into the frame of the camera lens after dark. Viewers now are able to observe the animals on YouTube as part of a community science project. The researchers also have developed 8-day curriculum that helps elementary school students teach children about ecology using Project RattleCam.

Salk Fellow Talmo Pereira, who designs AI-based tools to study movement in fields ranging from neuroscience to plant biology, joins the faculty as assistant professor. Julie Law, who studies how epigenetics influences human and plant health, has been promoted from associate professor to full professor.

A reconstructed protein interactome for the Last Eukaryotic Common Ancesor led researchers to identify hundreds of ancient genes that appear to be associated with human diseases. Follow-up experiments confirmed three of these gene-disease associations. The work could potentially lead to new targets for treating a host of other diseases.