Navigation Links
Loss of 'lake lawnmowers' leads to algae blooms
Date:9/28/2011

Unprecedented algae growth in some lakes could be linked to the decline of water calcium levels and the subsequent loss of an important algae-grazing organism that helps keep blooms at bay.

Daphniaalso known as water fleasact like microscopic lawnmowers in lakes, feeding on algae and keeping it in check. However, without sufficient calcium, these water fleas cannot reproduce.

"When water calcium levels get low and Daphnia populations decrease in any lake, algal growth goes unchecked and blooms can occur," says lead author and biology doctoral student Jennifer Korosi. "Losing an important grazer like these water fleas has a domino effect that leads to other water quality problems."

Declining calcium concentrations in some lakes, which is linked to acid deposition and logging, has only recently been identified as a serious environmental problem in North America and Europe.

By studying microscopic fossils and other indicators preserved in a lake sediment core from Lake George (Nova Scotia), the Queen's research team found that algal production remained relatively constant throughout the last century until around1990 when the levels tripled. The increase in algae directly coincided with the decrease of Daphnia in the lake.

"Algal blooms appear to be increasing in many lake regions," says biology professor John Smol, Canada Research Chair in Environmental Change, and previous winner of the Natural Sciences and Engineering Research Council of Canada (NSERC) Herzberg Gold Medal as Canada's top scientist. "Decreasing calcium levels appear to be one more factor that can exacerbate this problem. This is particularly worrisome given that many other stressors, such as climate warming and fertilizer runoff, are already contributing to the production of nuisance algal blooms. This is one more nail in the coffin."

Other members of the research team include PhD candidate Joshua Thienpont and undergraduate student Samantha Burke. Funding for the research comes from NSERC.

These findings will be published in the next issue of the prestigious international journal Proceedings of the Royal Society B.


'/>"/>

Contact: Christina Archibald
christina.archibald@queensu.ca
613-533-2877
Queen's University
Source:Eurekalert  

Related biology news :

1. EPA grants help Wayne State researchers stave off Great Lakes environmental invaders
2. Heavy metal -- in and around the lakes
3. Organic carbon suggests Swedish lakes were less acidified
4. Time to let science drive Great Lakes policy on Asian carp, experts say
5. Meltzone 2011: CCNY expedition to track life and death of supraglacial lake
6. A tale of 2 lakes: One gives early warning signal for ecosystem collapse
7. MARC Travel Award announced for ISCB Great Lakes Bioinformatics Conference
8. Invasive mussels causing massive ecological changes in Great Lakes
9. UW-Madison lake scientist gets worlds top water prize
10. Worlds largest lake sheds light on ecosystem responses to climate variability
11. Lake Erie hypoxic zone doesnt affect all fish the same, study finds
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Loss of 'lake lawnmowers' leads to algae blooms
(Date:12/6/2016)... Dec. 6, 2016 Valencell , the leading ... has seen a third consecutive year of triple digit ... in 2016 with a 360 percent increase in companies ... increase was driven by sales of its wrist and ... in its technology for hearables for fitness and healthcare ...
(Date:12/2/2016)... PUNE, India , December 1, 2016 /PRNewswire/ ... Market by Authentication type (Fingerprint, Voice), Future Technology (Iris ... Vehicle), and Region - Global Forecast to 2021", ... be USD 442.7 Million in 2016, and is ... 2021, at a CAGR of 14.06%. ...
(Date:11/30/2016)... , Nov. 30, 2016  higi SH llc ... partnership initiative targeting national brands, industry thought-leaders and ... their respective audiences for taking steps to live ... inception in 2012, higi has built the largest ... over 38 million people who have conducted over ...
Breaking Biology News(10 mins):
(Date:12/8/2016)... 2016   Biocept, Inc . (NASDAQ: ... clinically actionable liquid biopsy tests to improve the ... featuring its Target Selector™ Circulating Tumor Cell platform ... detection of actionable biomarkers in patients with metastatic ... Sara Cannon Research Institute (SCRI), the research arm ...
(Date:12/7/2016)... ... December 07, 2016 , ... A new study published in ... previously treated, advanced pancreatic cancer, liquid biopsies are not yet an adequate substitute ... of blood sampling may improve the value of a blood-based test.” The study ...
(Date:12/7/2016)... Dec. 7, 2016 Neogen Corporation (NASDAQ: ... Dan Kephart as its chief science officer ... assume his responsibilities at Neogen effective Jan. 1. ... for the agribusiness unit of Thermo Fisher Scientific, as ... Life Technologies. His extensive industry experience also includes the ...
(Date:12/7/2016)... , Dec. 7, 2016 /PRNewswire/ - Zenith Capital Corp. ("Zenith" or ... will be presented at the Company,s Annual and Special Meeting. ... Shareholders will take place on Thursday, December 15, 2016 at ... Hall (Room EC1040), 4825 Mount Royal Gate SW, ... A notice of meeting and management information circular, containing the ...
Breaking Biology Technology: