Which of the following is true regarding possible impacts on ecosystems that might occur as a result of climate change?
◦ Studies have demonstrated there will be no impact on plant distributions.
◦ The transition between prairie grasslands and northern forests is now in central Nebraska and is unchanging.
◦ The transition between prairie grasslands and northern forests is expected to move northward with increasing temperatures.
◦ Beech trees in eastern North America will not change in distribution.