Environmental: Ecosystems Geoscience: Landslides
Published

Mangrove and reef restoration yield positive returns on investment for flood protection, study shows      (via sciencedaily.com) 

Restoration of mangroves and coral reefs can be a cost-effective solution for coastal flood reduction in more than 20 countries across the Caribbean. Researchers used methods from the risk and insurance industry to provide rigorous valuations of these natural defenses and show that they can deliver a positive return on investment, with the benefits from reduced flood damage exceeding the costs of restoration. The results point toward new opportunities to support restoration efforts with funds from sources that support hazard mitigation, climate adaptation, and disaster recovery, including FEMA.

Geoscience: Landslides
Published

Study explores uncertainties in flood risk estimates      (via sciencedaily.com) 

Flood frequency analysis is a technique used to estimate flood risk, providing statistics such as the '100-year flood' or '500-year flood' that are critical to infrastructure design, dam safety analysis, and flood mapping in flood-prone areas. But the method used to calculate these flood frequencies is due for an update, according to a new study.

Paleontology: Early Mammals and Birds
Published

The secret lives of Darwin's finches reveal daily commutes the equivalent of 30 soccer fields      (via sciencedaily.com) 

Using radio transmitters, scientists have gained new insights into the behavior of medium ground finches in the Galapagos Islands. A study reveals daily movement patterns covering an area equivalent to the size of 30 soccer fields.

Paleontology: Early Mammals and Birds
Published

Study suggests that most of our evolutionary trees could be wrong      (via sciencedaily.com) 

New research suggests that determining evolutionary trees of organisms by comparing anatomy rather than gene sequences is misleading. The study shows that we often need to overturn centuries of scholarly work that classified living things according to how they look.

Paleontology: Dinosaurs Paleontology: Early Mammals and Birds
Published

Hot-blooded T. rex and cold-blooded Stegosaurus: Chemical clues reveal dinosaur metabolisms      (via sciencedaily.com) 

Paleontologists have debated whether dinosaurs were warm-blooded, like modern mammals and birds, or cold-blooded, like modern reptiles. In a new paper, scientists are unveiling a new method for studying dinosaurs' metabolic rates, using clues in their bones.

Paleontology: Early Mammals and Birds
Published

First Australians ate giant eggs of huge flightless birds, ancient proteins confirm      (via sciencedaily.com) 

Scientists settle debate surrounding species that laid eggs exploited by early Australian people around 50,000 years ago. Shell proteins point to Genyornis, which was among the 'mega-fauna' to go extinct a few thousand years after humans arrived on the continent.

Paleontology: Early Mammals and Birds
Published

Aerodynamic analysis causes a rethink of the biggest pterosaur      (via sciencedaily.com) 

Researchers shed light on the way Quetzalcoatlus would have flown, finding that the dinosaur's flying dynamics were actually very different to how it has been depicted in popular culture.

Paleontology: Early Mammals and Birds
Published

Discovered: 150-year-old platypus and echidna specimens that proved some mammals lay eggs      (via sciencedaily.com) 

Jars of tiny platypus and echidna specimens, collected in the late 1800s by the scientist William Caldwell, have been discovered in the stores of Cambridge's University Museum of Zoology.

Paleontology: Early Mammals and Birds
Published

Brain size determined the chances of survival among large animals, study finds      (via sciencedaily.com) 

Researchers have examined the mass extinction of large animals over the past tens of thousands of years and found that extinct species had, on average, much smaller brains than species that survived.

Geoscience: Landslides
Published

Landslides can have a major impact on glacier melt and movement      (via sciencedaily.com) 

Using satellite imagery to study the effects of a 2019 landslide on the Amalia Glacier in Patagonia, a research team found the landslide helped stabilize the glacier and caused it to grow by about 1,000 meters over the last three years.

Paleontology: Early Mammals and Birds
Published

Humans disrupting 66-million-year-old feature of ecosystems      (via sciencedaily.com) 

Human-related extinctions of the largest herbivores and carnivores are disrupting what appears to be a fundamental feature of past and present ecosystems, says a new study.

Paleontology: Early Mammals and Birds
Published

Brains and brawn helped crows and ravens take over the world      (via sciencedaily.com) 

Crows and ravens have great flying ability, which allows them to gain access to new places more easily. While these skills were key to their success, new research also shows that big bodies and big brains played an important role in helping crows and ravens survive in the new climates they occupied.

Paleontology: Early Mammals and Birds
Published

Pterosaur discovery solves ancient feather mystery      (via sciencedaily.com) 

Palaeontologists have discovered remarkable new evidence that pterosaurs, the flying relatives of dinosaurs, were able to control the color of their feathers using melanin pigments.

Paleontology: Early Mammals and Birds
Published

Research reveals human-driven changes to distinctive foraging patterns in North Pacific Ocean      (via sciencedaily.com) 

The first large-scale study of its kind has uncovered more than 4,000 years' worth of distinctive foraging behavior in a species once driven to the brink of extinction.

Paleontology: Early Mammals and Birds
Published

Climatic variability might not drive evolutionary change as much as previously thought      (via sciencedaily.com) 

A new study combining records of climate change during the last 3.5 million years with fossil evidence of mammals in Africa reveals that times of erratic climate change are not followed by major upheavals in evolution.

Paleontology: Early Mammals and Birds
Published

Dynamic rivers contributed to Amazon's rich bird diversity      (via sciencedaily.com) 

One of the most contentious questions in evolutionary biology is, how did the Amazon become so rich in species? A new study focused on birds examines how the movements of rivers in the Amazon have contributed to that area's exceptional biological diversity. The researchers found that as small river systems change over time, they spur the evolution of new species. The findings also reveal previously unknown bird species in the Amazon that are only found in small areas next to these dynamic river systems, putting them at high risk.

Geoscience: Landslides
Published

Flood risk for Iowa farmland      (via sciencedaily.com) 

Researchers have created a detailed set of maps examining the flood risk for all farmland in Iowa. The maps show 450,000 acres of crops in areas with a 50% chance of flooding, and losses from flooding averaging $230 million annually.

Geoscience: Landslides
Published

Drenching rains to pose greater threat to fire-damaged areas in West      (via sciencedaily.com) 

The western United States this century is facing a greatly heightened risk of heavy rains inundating areas recently scarred by wildfires, new research warns. Such events can cause significant destruction, including debris flows, mudslides, and flash floods, because the denuded landscape cannot easily contain the drenching moisture.

Paleontology: Dinosaurs Paleontology: Early Mammals and Birds
Published

Mammals put brawn before brains to survive post-dinosaur world      (via sciencedaily.com) 

Prehistoric mammals bulked up, rather than develop bigger brains, to boost their survival chances once dinosaurs had become extinct, research suggests.

Paleontology: Early Mammals and Birds
Published

How new bird species arise      (via sciencedaily.com) 

Much of a centuries-old debate over where and how new bird species form has now been resolved. Researchers have provided evidence that birds in mountainous areas -- where the vast majority of the planet's species live -- have left lowland habitats for higher and higher mountain elevations throughout their evolution. Millions of years of climatic fluctuations have contributed to pushing bird species upslope -- as is probably happening now.