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DNA exchange among species is major contributor to diversity in Heliconius butterflies

A new study finds that hybridization significantly influences the evolutionary history of Heliconius butterflies, contributing to their unique wing patterns. The research suggests that hybridization can provide genetic material for rapid adaptive divergence and radiation, leading to beneficial consequences in species evolution.

Diversity increases ecosystem stability

A study published in Global Change Biology found that forests with a diverse range of tree species are more productive and stable than monocultures. The research analyzed data from the Sardinilla experiment and concluded that mixtures of two and three tree species have significantly higher productivity, while those with five species ha...

SourceUniversity of Freiburg·JournalGlobal Change Biology·DateSep 5, 2019

Genetic diversity couldn't save Darwin's finches

Researchers at the University of Cincinnati discovered that six out of eight extinct Galapagos finch populations had higher genetic diversity than their surviving counterparts. This finding suggests that genetic diversity may not be a reliable predictor of extinction risk for mobile species like finches.

SourceUniversity of Cincinnati·JournalConservation Genetics·DateAug 22, 2019

Study reveals the evolution and diversity of Leptospira bacteria

A recent study has sequenced the genomes of Leptospira bacteria from around the globe, revealing 30 new species and reorganizing the genus into four distinct lineages. The findings provide new insights into the evolution and diversity of Leptospira bacteria, which are a major cause of zoonotic disease affecting millions worldwide.

SourcePLOS·JournalPLOS Neglected Tropical Diseases·DateMay 23, 2019

Mapping the global distribution of phytoplankton

Researchers from ETH Zurich have modeled the spatial and temporal distribution of over 530 species of phytoplankton using 700,000 water samples. The study reveals that tropical waters hold the richest diversity of species at all times of the year, while mid-latitudes exhibit lower biodiversity due to strong currents and turbulence.

SourceETH Zurich·JournalScience Advances·DateMay 22, 2019

In the tree of life, youth has its advantages

A recent study published in Proceedings of the National Academy of Sciences found that younger groups of organisms diversify faster than older ones, challenging traditional explanations for the Tree of Life's imbalance. This suggests that time-dependent general principles govern life's diversity on Earth, operating beneath other factors

SourceUniversity of British Columbia·JournalProceedings of the National Academy of Sciences·DateMar 26, 2019

How tree diversity affects invasive forest pests

A broad-scale study found a significant relationship between tree diversity and nonnative pest invasions. High tree diversity reduces pest invasions by creating ecological niches that make it harder for pests to find resources, while low diversity increases the risk of invasion. The study's results have important implications for fores...

SourceUSDA Forest Service ‑ Southern Research Station·JournalProceedings of the National Academy of Sciences·DateMar 25, 2019

Environmental change, not hominin hunters, drove the demise of African megaherbivores

A new study challenges the traditional hypothesis that ancient hominins led to the decline of African megaherbivores. The research reveals that environmental changes, such as changes in atmospheric carbon dioxide and tropical grassland expansion, drove the long-term decline of these large-bodied species over 7 million years.

Eleven seal species narrowly escaped extinction

A study published in Nature Communications reveals that eleven seal species narrowly escaped extinction, with most surviving strong population declines. However, four species, including the northern elephant seal and Mediterranean monk seal, suffered severe genetic loss due to overhunting.

SourceBielefeld University·JournalNature Communications·DateNov 16, 2018