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:
(Date:10/15/2014)... an unexpected extent. The outbreak does not follow the ... a new disease dynamic in regions, where it has ... National Academy of Sciences Leopoldina, acatech – the German ... the German Academies of Sciences and Humanities have presented ... the statement the academies call for the following consequences ...
(Date:10/15/2014)... 15, 2014   Neurotechnology , a provider ... availability of the VeriLook Surveillance 3.0 software ... real-time biometric face identification using live video streams ... The new version not only identifies faces in ... objects while they are moving through the video ...
(Date:10/14/2014)... house fly genome for the first time, revealing robust ... that thrives in pathogen-rich dung piles and garbage heaps. ... Genome Biology , will increase understanding of house ... adapt to resist insecticides, which could lead to novel ... and transmit more than 100 human and animal diseases, ...
Breaking Biology News(10 mins):Academies call for consequences from the Ebola virus epidemic 2Academies call for consequences from the Ebola virus epidemic 3Academies call for consequences from the Ebola virus epidemic 4Academies call for consequences from the Ebola virus epidemic 5VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 2VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 3House fly genome reveals expanded immune system 2
(Date:10/22/2014)... CA (PRWEB) October 22, 2014 ... from Sartorius, A & D Weighing, Rice Lake, ... CPA Semi-Micro Balance . The Sartorius CPA Semi-Micro ... an affordable high-quality, precise, and user-friendly laboratory balance. ... of laboratory equipment, their laboratory balances are well ...
(Date:10/22/2014)... (PRWEB) October 22, 2014 Physicians ... its cardiovascular pharmacogenetics menu, which enables healthcare providers ... With PCLS’s evidence-based results, healthcare providers are ... optimize their therapy, while minimizing risks for adverse ... U.S., according to the FDA [1] more than ...
(Date:10/22/2014)... ROCKVILLE, Md. , Oct. 22, 2014   ... company developing novel pathogen-specific therapies for serious infections and ... Office has issued a Notice of Allowance for a ... product in its C. difficile program, SYN-004. This ... to SYN-004 in the U.S. and adds to the ...
(Date:10/22/2014)... , Oct. 22, 2014 Nuvilex, Inc. (OTCQB: ... 400 million people worldwide are living with diabetes, with  ... by 2030.  The global market for diabetes treatments is ... 330,000 people worldwide died from pancreatic cancer.  Pancreatic cancer ... to cancer in the United States ...
Breaking Biology Technology:Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 3PCLS Announces Expansion of Cardiovascular Pharmacogenetic Testing Menu 2PCLS Announces Expansion of Cardiovascular Pharmacogenetic Testing Menu 3Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 2Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 3Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 4Nuvilex Brief Analyst Report: Thinking Outside the Box by BrokerBank Securities, Inc. 2
Cached News: