HOME >> BIOLOGY >> NEWS
Burrowing mayfly swarms signal a healthier ecosystem, USGS scientists say

While swarms of flying insects may have little appeal for most people, USGS biologist Thomas Edsall says the clouds of burrowing mayflies emerging from western Lake Erie this summer are a welcome sign of an ecosystem in recovery.

"They're telling us that the water's clean out there," Edsall says.

Burrowing mayflies are large aquatic insects that spend most of their lives -- about two years -- in their larval form, living in shallow bottom sediments of lakes. On the bottom of western Lake Erie, larval mayflies -- known as nymphs -- once numbered in the hundreds per square meter. But populations decreased dramatically in the 1950s due to deteriorating water quality, and throughout most of the next three decades burrowing mayflies were virtually absent from their former Great Lakes habitat.

For the last five years, however, a remarkable recovery has been under way. Edsall and his colleagues at the USGS Great Lakes Science Center report that nymphs in western Lake Erie have increased from near zero to numbers approaching those of the early twentieth century.

Edsall says the mayfly recovery is a strong sign that improvements in water quality, which have been taking place since the 1970s, have resulted in a healthier, more normally functioning ecosystem. "This is a real tribute to the EPA's enforcement of water pollution control laws, such as the Clean Water Act and U.S. and Canadian cooperation through the Great Lakes Quality Agreement," he says.

USGS and Canadian biologists have used several different methods to determine the past distribution and abundance of burrowing mayflies in Lake Erie and to understand how the insects have responded to different forms of water and sediment of contamination. Sediment core samples, dating back to about 1740, contain jaw parts and other preserved remains that provide a continuous record of burrowing mayfly densities in different regions of the lake. Other information comes from pe
'"/>

Contact: John Gannon
john_e_gannon@brd.usgs.gov
734-214-7237
United States Geological Survey
13-Jul-1999


Page: 1 2 3

Related biology news :

1. Chemical signals health of brain cells Symposium
2. Activated signaling pathway may predict lung cancer patients response to gefitinib
3. NRH1 and Wnt signaling come together in convergent extension
4. Sequential signals choreograph embryonic tubule formation
5. Molecular traffic cop directs cellular signals
6. Stem cells commit to a future of fat with one signal
7. From lung to gut the Wnt signaling pathway transforms cell fate
8. Brain signal predicts working memory prowess
9. Fetal lungs provide a signal initiating labor, UT Southwestern researchers find
10. Ambient light influences the evolution of colour signals
11. Equine clonings triple play sheds light on calcium, cell signaling, human disease

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/23/2020)... ... ... In its June 22 online post, business and technology news platform Superb Crew ... and director of stem cell biotechnology company Asymmetrex . Superb Crew decided to ... 5 it would begin offering free tissue stem cell counting at its ...
(Date:6/19/2020)... ... June 18, 2020 , ... ... “Automate Your Lab with Software for Data Decisions,” for pharmaceutical and biotech ... to integrate and automate cutting-edge scientific instruments and laboratory equipment from dozens ...
(Date:6/13/2020)... ... 2020 , ... Bode Technology (Bode), a leading ... team. Bode’s Forensic Genealogy Service (FGS) continues to deliver investigative leads ... The team has added experienced genealogists, each having over a decade of field ...
Breaking Biology News(10 mins):
(Date:7/18/2020)... ... 2020 , ... “We are thrilled to deliver this new technology to the ... its kind on the market and we were pleased that the IFT jury recognized ... cultured ingredients, creating a natural way to extend the shelf life and improve the ...
(Date:7/18/2020)... ... July 17, 2020 , ... ... the life sciences and food industries, is pleased to announce that Charles Galea ... – Business Development. , Charles is an accomplished and results-driven sales executive with ...
(Date:7/10/2020)... ... July 09, 2020 , ... PathSensors ... (MIT) has expanded the company’s exclusive license to include clinical applications for ... diagnostic market, focusing initially on the SARS-CoV-2 biosensor. CANARY’s™ fast and ...
(Date:7/10/2020)... ... July 09, 2020 , ... Sentien Biotechnologies, ... the hiring of Allen R. Nissenson, M.D., F.A.C.P., as its Chief Medical Officer. ... of Sentien’s lead product, SBI-101. Dr. Nissenson serves as an Emeritus Professor ...
Breaking Biology Technology:
Cached News: