Scientists say the invasive species Salsola ryanii may spread even further as a result of climate change.
A new invasive species of tumbleweed that can grow up to six feet in height is taking over parts of California—and scientists are warning it could spread even further as climate change makes its growing conditions more favorable.was first identified in California in 2002. It is a hybrid made up of two other invasive species—, from Australia and South Africa. The latter, scientists say, is"one of the world's worst weeds" and is currently found in 48 U.S. states.
Unlike animals, which tend to reproduce with one set of chromosomes from a mother and another from a father, plants can produce offspring with more than two sets. These plants are known as polyploids. Most of the time these offspring are unable to reproduce themselves—when a species is new it is at a disadvantage as it has nothing exactly like it to reproduce with.
At the end of the season, they looked at the mass and seed numbers for hundreds of plants. Findings showed thatwas far more successful than its parents:"We document an increase in above-ground plant mass and above-ground volume in the newly formed allopolyploid compared to its progenitors," they wrote.
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