Urban warming slows photosynthesis and growth in city trees

by Matt Shipman, NC State University

New research from North Carolina State University finds that urban warming reduces growth and photosynthesis in city trees. The researchers found that insect pests are part of the problem, but that heat itself plays a more significant role.

Earlier studies have shown that urban warming increases pest abundance in street trees,” says Emily Meineke, lead author of a paper describing the work. “We wanted to know how urban warming and pest abundance affect tree growth, since trees pull carbon out of the atmosphere and convert it into biomass. This is important, because we know that high levels of atmospheric carbon play a role in climate change.” Meineke did the work while a Ph.D. student at NC State. She is now a postdoctoral researcher at Harvard. Continue reading

Scale insects more abundant at higher temperatures

A study by two researchers at North Carolina State University concludes that damaging scale insects are more abundant in urban heat islands.

Read more at http://entomologytoday.org/2014/07/25/city-heat-boosts-tree-killing-scale-insect-populations/