Warming temperatures are turning
a native Australian shrub into a mini version of itself, revealing the effect
climate change is already having on the globe.Researchers from the University
of Adelaide examined specimens of narrow-leaf hopbush (Dodonaea
viscosa, subspecies angustissima), a woody shrub with papery red seed capsules
that were used by early Australian colonists to brew beer.
They found that between the 1880s and the present, leaves have narrowed by an
average of 0.08 inches (2 millimeters).
"Climate
change is often discussed in terms of future impacts, but changes in
temperature over recent decades have already been ecologically
significant," study researcher Greg Guerin, a postdoctoral researcher at
the University of Adelaide, said in a statement. "Climate change is
driving adaptive shifts within plant species and leaf shape has demonstrated
adaptive significance in relation to climate."
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