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An international team of researchers led by two Villanova University biologists has found that climate change is dramatically altering terrestrial plant communities and their ecosystems at such a rapid pace that having a stable baseline from which to conduct experiments is becoming increasingly difficult.
In an article titled "Ambient Changes Exceed Treatment Effects on Plant Species," just published in the journal Global Change Biology, lead author Adam Langley, Ph.D. and co-author Samantha K. Chapman, Ph.D., both associate professors in Villanova's Department of Biology, together with a team of 16 researchers, documented findings that compared the abundance of ambient (growing in natural conditions) plants to plants in plots experimentally treated with elevated carbon dioxide, nutrients, water and warming to simulate future environmental changes.
Researchers - Change - Abundance - Ambient - Plants
The researchers compared the change in abundance of ambient plants to the treated ones. Using a database of long-term global change studies over a 30-year period, the team estimated trends in plant abundance for 791 plant species in ambient and treated plots across 16 long-term global change experiments, yielding 2,116 experiment-species-treatment combinations. The results were surprising.
For most species (57 per cent), according to the article, the magnitude of ambient change was greater than the magnitude of treatment effects—the opposite of the result expected by the researchers.
Preponderance - Evidence - Climate - Change - Plant
"A preponderance of evidence suggests that ongoing climate change is dramatically altering terrestrial plant communities," the article states.
The publication of the Global Change Biology article is particularly timely given the Oct. 7 release of The United Nation's Intergovernmental Panel on Climate Change (IPCC) report on climate change.
IPCC - Report - C - Warming - Threshold
"The IPCC report states we are already halfway to the 1.5 degree C. warming threshold, above which we will have severe global effects," Langley said. "With current...
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