(Radio Iowa) – Researchers at Iowa State University using satellite data have found an impact from city lights on trees and plants. Yuyu Zhou, says the impact is significant. “The artificial nighttime lights can advance the start of the (growing) season of the trees, and also delay the end of the, of the trees or plants,” he says. They concluded the lights advanced the date of breaking leaf buds in the spring by nearly nine days and delayed the coloring of leaves by about six days in the fall. He says it’s the first large-scale look at the impact. Those who suffer from allergies could be feeling the impact on the growing season for what it produces.

“Early pollen season and also longer pollen season,” he says. Zhou says the urban heat island effect — where urban areas heat up faster than rural areas also contributes to the growing season changes. He says the change in the growing season can mismatch different trees and mess with the natural cycle. “It will cause the problem of the pollination service. And also another issue is because of the early start up — it can have high vulnerability to the spring frost damage.” Zhou explains.

Zhou is an associate professor of geological and atmospheric sciences at Iowa State. He says there is a positive to extending the season for some plants. “Because we can have a longer growing season in an urban area for an urban farm,” he says. The study compared seasonal changes in plants at around three thousand urban sites.

(Radio Iowa) – Out of state visitors at two western Iowa parks will have to keep paying an entrance fee for at least two and a half more years. Lake Manawa State Park in Council Bluffs had three million visitors last year and Representative Brent Siegrist, of Council Bluffs, says the fee may be a way to thin the crowds.

“Lake Manawa is the most heavily used park in the state park system, particularly because it’s next to Omaha and there are tons of Nebraskans that come over,” Siegrist says. “…Waubonsie State Park also is down near the Missouri border in Fremont County and they have a lot of traffic and visitors there.” In 2019, the legislature authorized an entrance fee of five dollars per out-of-state vehicle at both parks. It was a pilot project, to see if visitor traffic would change.

“The COVID years dramatically affected those parks at that time,” Siegrist says, “so they didn’t have a particularly good read about whether this is something they wanted to extend into the future.” This week Governor Reynolds approved the bill that keeps the fee in place until the end of 2025. Senator Dan Dawson of Council Bluffs says the fee can be a tool for keeping the peace in the park that’s just 10 miles from Omaha.

“When they have a crowd coming over to our parks to use it for purposes that you and I or anyone else here might not enjoy to take our families there and just enjoy the day — whether they want to drink or tear up the park or go off-road or so something like that, this is one more tool to try to maybe redirect some of our non-residents back to their state,” Dawson says.

There’s a daily fee for every vehicle entering a NEBRASKA state park. It’s six dollars for Nebraskans and eight dollars for everyone else. The State of Iowa began charging a 10-dollar yearly park user fee in 1987, but it was repealed two years later. During debate of the continued entrance fees for Lake Manawa and Waubonsie State Parks, legislators said they were not interested in imposing entrance fees at the other 81 state parks and recreation areas in Iowa.