Featured Research

from universities, journals, and other organizations

Scientists Surprised By Unexpected Emergence Of Periodical Cicadas -- Four Years Early

Date:
May 8, 2009
Source:
College of Mount St. Joseph
Summary:
Periodical cicadas, insects best known for their 17-year long life cycle, are emerging four years early in several Atlantic states. The emergence was first noticed in Greensboro, NC, on Monday and has since been reported in Maryland.

Scientists are reporting a four-year acceleration of the periodical cicada Brood II.
Credit: Image courtesy of College of Mount St. Joseph

Periodical cicadas, insects best known for their 17-year long life cycle, are emerging four years early in several Atlantic states. The emergence was first noticed in Greensboro, NC, on Monday and has since been reported in Maryland.

“This appears to be a four-year acceleration of the periodical cicada Brood II,” said Dr. Gene Kritsky, Ph.D., professor of biology at the College of Mount St. Joseph. Kritsky is an expert on these four-year early emergences being the first to predict an early appearance of the cicadas in 2000.

“It is thought that the timing of the emergence is determined during the first five years of the underground development of the juvenile cicadas.” Kritsky and his students monitor the cicada growth by digging up the insects each year. “We discovered that many cicadas were growing faster than expected, which led the prediction of their early emergence in 2000,” he said.

The emergence this year is the fifth 17-year cicada brood to appear early. Kritsky described the early appearance of Brood I in 1995 in eastern Ohio and predicted the early appearance of Brood X. Brood XIII appeared early in parts of Chicago in 2003 and Brood XIV accelerated in parts of Indiana and Ohio in 2004. This year’s acceleration is overlapping with the distribution of Brood II.

The cause of these early emergences is unknown, but Kritsky, in a paper to be published in the Proceedings of the Indiana Academy of Science, has found evidence suggesting that mild winters can affect the trees that young cicadas feed upon which in turn interferes with the cicadas’ timekeeping resulting in their emerging early. “This phenomenon might be another biological response to increasing temperatures,” Kritsky said.

People witnessing cicadas this year are encouraged to report their cicadas on mapping websites, at http://www.msj.edu/cicada.


Story Source:

The above story is based on materials provided by College of Mount St. Joseph. Note: Materials may be edited for content and length.


Cite This Page:

College of Mount St. Joseph. "Scientists Surprised By Unexpected Emergence Of Periodical Cicadas -- Four Years Early." ScienceDaily. ScienceDaily, 8 May 2009. <www.sciencedaily.com/releases/2009/05/090507142230.htm>.
College of Mount St. Joseph. (2009, May 8). Scientists Surprised By Unexpected Emergence Of Periodical Cicadas -- Four Years Early. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2009/05/090507142230.htm
College of Mount St. Joseph. "Scientists Surprised By Unexpected Emergence Of Periodical Cicadas -- Four Years Early." ScienceDaily. www.sciencedaily.com/releases/2009/05/090507142230.htm (accessed July 31, 2014).

Share This




More Earth & Climate News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Big Waves In Arctic Ocean Threaten Polar Ice

Big Waves In Arctic Ocean Threaten Polar Ice

Newsy (July 30, 2014) Big waves in parts of the Arctic Ocean are unprecedented, mainly because they used to be covered in ice. Video provided by Newsy
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com
Amid Drought, UCLA Sees Only Water

Amid Drought, UCLA Sees Only Water

AP (July 30, 2014) A ruptured 93-year-old water main left the UCLA campus awash in 8 million gallons of water in the middle of California's worst drought in decades. (July 30) Video provided by AP
Powered by NewsLook.com
In Virginia, the Rise of a New Space Coast

In Virginia, the Rise of a New Space Coast

AP (July 30, 2014) Every summer, tourists make the pilgrimage to Chincoteague Island, Va. to see wild ponies cross the Assateague Channel. But, it's the rockets sending to supplies to the International Space Station that are making this a year-round destination. (July 30) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile: iPhone Android Web
      Follow: Facebook Twitter Google+
      Subscribe: RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins