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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

New World screwworm is back in the U.S.

An insect that “sends shivers down every rancher’s spine” has been discovered in Florida.

Wildlife officials found samples of New World screwworm in deer in the areas of Big Pine Key and No Name Key in Florida. The insect’s identification was confirmed by the USDA Animal and Plant Health Inspection Service. Continue reading

APHIS Amends Karnal Bunt Regulated Areas in Maricopa and Pinal Counties, Arizona

Effective immediately, the Animal and Plant Health Inspection Service (APHIS) is amending the Karnal bunt regulated areas in Maricopa and Pinal Counties in Arizona. Specifically, it reduces the regulated area in Maricopa County and increases the regulated area in Pinal County.

Following a review of available information, APHIS determined that 131 fields qualify for deregulation in accordance with the criteria listed in 7 Code of Federal Regulations (CFR) § 301.89-3(f). Accordingly, restrictions are no longer required on the interstate movement of Karnal bunt regulated articles from these areas. Specifically, APHIS is removing a total of 5,189 acres from the list of regulated areas in Maricopa County, Arizona, including 1,612 acres of tribal land. Continue reading