By 1990, there was evidence that rising CO2
levels reduce nutrients in plants. So, even while
elevated CO2 levels can speed growth of plants,
the plant-eaters have had to eat more plant
tissue to gain the same nutrition.
This effect is independent of CO2’s capacity to
retain heat that would have escaped into space,
but the combined two effects will plausibly be
greater than either one alone.
The research on CO2 and nutritional content of
plants has continued for these past 18 years, and
now includes implications for domestic livestock,
humans, and wildlife. Evidence based on koala
research is just the latest finding in a
longstanding topic of interest.
Lance
—————————————–
“This change will mean eucalypt species with high protein content will become
unbeneficial to the koala as the so-called
“anti-nutrients” such as tannins bind
the protein making it unusable.”
—————————————–
The Sydney Morning Herald (Sydney, Australia)
May 6, 2008 – 11:49PM
climate change threatens koalas: expert
The koala is under threat from climate change,
according to new research which shows rising
carbon dioxide levels are killing nutrients in
the plants they eat.