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:4/4/2017)... April 4, 2017   EyeLock LLC , a ... the United States Patent and Trademark Office (USPTO) has ... the linking of an iris image with a face ... represents the company,s 45 th issued patent. ... very timely given the multi-modal biometric capabilities that have ...
(Date:3/30/2017)...  On April 6-7, 2017, Sequencing.com will host the ... hackathon at Microsoft,s headquarters in Redmond, Washington ... developing health and wellness apps that provide a unique, ... is the first hackathon for personal genomics and ... in the genomics, tech and health industries are sending ...
(Date:3/30/2017)... YORK , March 30, 2017 Trends, ... type (physiological and behavioral), by technology (fingerprint, AFIS, iris ... voice recognition, and others), by end use industry (government ... and immigration, financial and banking, and others), and by ... Europe , Asia Pacific , ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... San Diego, CA (PRWEB) , ... ... ... BioInformatics (https://www.onramp.bio/ ) has launched Rosalind™, the first-ever genomics analysis platform ... eliminating all bioinformatics complexity. Named in honor of pioneering researcher Rosalind Franklin, ...
(Date:10/11/2017)... ... October 11, 2017 , ... ComplianceOnline’s Medical Device Summit is back for its ... 2018 in San Francisco, CA. The Summit brings together current and former FDA office ... directors and government officials from around the world to address key issues in device ...
(Date:10/11/2017)... ... ... Disappearing forests and increased emissions are the main causes of the evolving ... those living in larger cities are affected by air pollution related diseases. , That ... countries globally - decided to take action. , “I knew I had to take ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... conjugate (ADC) therapeutics, today confirmed licensing rights that give it exclusive global ... technology developed in collaboration with Children’s Hospital Los Angeles (CHLA). Additionally, ...
Breaking Biology Technology:
Cached News: