Study of nature preserve reveals more than 1,000 species and signs of changing oceans

5 days 11 hours ago
Blue Cavern Point on the eastern edge of Santa Catalina Island, some 25 miles off the coast of San Pedro, California, is a hotbed of life. In the shallow edges of the water cling starfish, sea urchins and sea cucumbers. Farther out in deeper seas, bright orange garibaldi and giant sea bass the size of pianos make their home in rippling forests of giant kelp reaching hundreds of feet from the ocean's surface to its floor.

Why animals recognise numbers but only humans can do math

5 days 11 hours ago
Counting feels utterly effortless to adults, who are unlikely to even remember when or how they picked up this useful, apparently automatic skill. Yet when you think about it, counting is a remarkable invention. It helped early humans to trade, apportion food and organize fledgling civilisations, laying the foundations for life as we know it today.

New research helps explain diversity of life and paradox of sex

5 days 13 hours ago
There are huge differences in species numbers among the major branches of the tree of life. Some groups of organisms have many species, while others have few. For example, animals, plants and fungi each have over 100,000 known species, but most others—such as many algal and bacterial groups—have 10,000 or less.

New 'green status of species' measures impact of conservation action

5 days 13 hours ago
An international team of scientists including Stony Brook University Professor Resit Akcakaya, Ph.D., published a paper in Conservation Biology that for the first time applies the IUCN Green Status of Species, a new Global Standard to measure how close a species' is to being fully ecologically functional across its range, and how much it has recovered thanks to conservation action. Preliminary IUCN Green Status assessments for 181 species are presented in the paper.

Measuring conservation in a way that counts

5 days 17 hours ago
A new study raises questions on whether current conservation science and policy for protected areas could be saving more biodiversity—with political and economic expediency often having taken precedence in the past.

Common floral bacteria can induce pollen germination

6 days 4 hours ago
Certain species of floral bacteria can enhance pollen germination, according to a study published today from the University of California, Davis in the journal Current Biology."This is the first paper documenting stimulation of pollen germination by non-plants," said first author Shawn Christensen, a doctoral candidate in associate professor Rachel Vannette's laboratory in the Department of Entomology and Nematology. "Nectar-dwelling Acinetobacter bacteria stimulate protein release by inducing pollen to germinate and burst, benefitting Acinetobacter."

Exploring blood types of Neanderthal and Denisovan individuals

6 days 6 hours ago
An analysis of the blood types of one Denisovan and three Neanderthal individuals has uncovered new clues to the evolutionary history, health, and vulnerabilities of their populations. Silvana Condemi of the Centre National de la Research Scientifique (CNRS) and colleagues at Aix-Marseille University, France, present hese findings in the open-access journal PLOS ONE on July 28, 2021.

Molecular atlas reveals how brain cells develop

6 days 8 hours ago
As the fertilized egg divides, initially undifferentiated cells take on specific functions, becoming more distinct as different tissues and organs emerge. Understanding how hundreds of disparate cell types arise has proven difficult, largely because scientists have lacked the technologies to capture cellular decision making over time.

Double-strand RNA exhibits traits different from single-stranded RNA

6 days 8 hours ago
Messenger RNA, or mRNA, has been in the news recently as a crucial component of the Pfizer-BioNTech and Moderna COVID-19 vaccines. The nucleic acid looks, for all intents and purposes, like a strand of DNA that has been sliced the long way. It's what's known as single-stranded RNA (ssRNA), and it can be found throughout the natural world.
2 minutes 13 seconds ago
Read the latest science news from Phys.org on biology, evolution, microbiology, biotechnology
Subscribe to Phys.org Biology feed