Navigation Links
Acid rain poses a previously unrecognized threat to Great Lakes sugar maples
Date:12/15/2011

ANN ARBOR, Mich. -- The number of sugar maples in Upper Great Lakes forests is likely to decline in coming decades, according to University of Michigan ecologists and their colleagues, due to a previously unrecognized threat from a familiar enemy: acid rain.

Over the past four decades, sugar maple abundance has declined in some regions of the northeastern United States and southeastern Canada, due largely to acidification of calcium-poor granitic soils in response to acid rain.

Sugar maple forests in the Upper Great Lakes region, in contrast, grow in calcium-rich soils. Those soils provide a buffer against soil acidification. So sugar maple forests here have largely been spared the type of damage seen in mature sugar maples of the Northeast.

But now, a U-M-led team of ecologists has uncovered a different and previously unstudied mechanism by which acid rain harms sugar maple seedlings in Upper Great Lakes forests.

The scientists have concluded that excess nitrogen from acid rain slows the microbial decay of dead maple leaves on the forest floor, resulting in a build- up of leaf litter that creates a physical barrier for seedling roots seeking soil nutrients, as well as young leaves trying to poke up through the litter to reach sunlight.

"The thickening of the forest floor has become a physical barrier for seedlings to reach mineral soil or to emerge from the extra litter," said ecologist Donald Zak, a professor at the U-M School of Natural Resources and Environment and co-author of an article published online Dec. 8 in the Journal of Applied Ecology. Zak is also a professor of ecology and evolutionary biology.

"What we've uncovered is a totally different and indirect mechanism by which atmospheric nitrogen deposition can negatively impact sugar maples," Zak said.

The new findings are the latest results from a 17-year experiment at four sugar maple stands in Michigan's lower and upper peninsulas.
'/>"/>

Contact: Jim Erickson
ericksn@umich.edu
734-647-1842
University of Michigan
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. AMP opposes exclusive licensing of NIH proteomics patent
2. TV viewing poses greater risk than computer use for cardiovascular disease
3. New book proposes solutions to social and ecological challenges posed by climate change
4. Gene defect that predisposes people to leukemia discovered
5. Bee challenged -- toxin-laden nectar poses problems for honeybees
6. Greater food insecurity from recession poses increased risk to low income individuals with diabetes
7. Biochemist proposes worldwide policy change to step up daily vitamin D intake
8. Solution to beading-saliva mystery has practical purposes
9. Propofol poses low risk in pediatric imaging studies, but risk increases with anesthesia duration
10. DNA barcoding exposes fake ferns in international plant trade
11. Linheng Li proposes novel theory for mammalian stem cell regulation
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Acid rain poses a previously unrecognized threat to Great Lakes sugar maples
(Date:7/13/2014)... more effective treatments for cachexia, a profound wasting of ... cancer patients, raising their risk of death, according to ... been tried to reverse the condition, which may cause ... but none have had great success. , Scientists reporting ... Nature , led by Bruce Spiegelman, PhD, demonstrated that ...
(Date:7/11/2014)... The Mills Canyon fire started near the City of ... of local resources, the fire quickly grew to over ... cause of the fire is under investigation by the ... is working with existing local resources in developing fire ... Forest Service (USFS), Washington State Department of Natural Resources, ...
(Date:7/11/2014)... Cell scientists have set a "mouse TRAP" to capture ... a recent study published in the Journal of ... a technique called TRAP to extract cellular and genetic ... by scientists at the Rockefeller Institute for Medical Research ... the protein-making machinery, or ribosomes, of the cell type ...
Breaking Biology News(10 mins):Antibody halts cancer-related wasting condition 2Antibody halts cancer-related wasting condition 3
... at Mount Sinai School of Medicine have discovered a ... and resistance to chemotherapy, and participate in tumor progression. ... tests for early cancer diagnosis, prognostic tests, and innovative ... Resistance to chemotherapy is a frequent ...
... The decision has been taken by the German government to ... The transition process is gaining impetus but much remains to ... wind energy is to be dramatically expanded not only ... still immense potential inland that remains to be tapped, such ...
... appreciate this fabric, which looks innocuous but in fact ... a microcontroller that detects warning signals emitted when the ... can be used to protect buildings, bank vaults, and ... parked overnight at truck stops are particularly vulnerable to ...
Cached Biology News:Researchers reveal a chemo-resistant cancer stem cell as cancer's 'Achilles' heel' 2More accurate wind energy forecasts 2More accurate wind energy forecasts 3A smart fabric sets off the alarm 2A smart fabric sets off the alarm 3
(Date:7/10/2014)... July 10, 2014 Research and Markets ... the "International Photonic Integrated Circuit (Monolithic Integration, ... 2019" report to their offering. ... concept of photonic integration traces its roots in ... promise of photonic integration went unexplored and unfulfilled ...
(Date:7/10/2014)... to the International Atomic Energy Agency (IAEA) the ... acquiring sufficient quantities of plutonium or highly enriched ... device. The IAEA also notes that most cases ... which can be challenging to detect with most ... appearing this week in the Journal of ...
(Date:7/10/2014)... Using microscopic polymer light resonators that expand in ... Quantum Photonics Laboratory have developed new optical sensors ... Optical sensors are ideal for detecting trace gas ... lightweight nature, and immunity to electromagnetic interference. , ... before, the MIT team conceived an extremely sensitive, ...
(Date:7/10/2014)... Understanding the basis of psychiatric disorders has been extremely ... increase risk but are insufficient to cause disease. Now ... Cell Press journal Cell Stem Cell describe ... genetic risks interact with other risk factors or environmental ... Their research pinpoints a genetic variant that may predispose ...
Breaking Biology Technology:International Photonic Integrated Circuit (Monolithic Integration, Hybrid Integration, Module Integration) Market - Forecasts to 2019 2Sensitive detection method may help impede illicit nuclear trafficking 2Swell new sensors 2New strategy could uncover genes at the root of psychiatric illnesses 2
... AMDL, Inc. (Amex:,ADL), with operations in Shenzhen, ... subsidiary Jade Pharmaceutical Inc. (JPI), an international,biopharma ... and,marketing of proprietary pharmaceutical and diagnostic products, ... expansion plans to increase,annualized sales in FY2008, ...
... Nov. 20 Sangamo,BioSciences, Inc. (Nasdaq: SGMO ) ... provide an update on the progress of,Sangamo,s ZFP Therapeutic ... at 11:00 am (ET) on Wednesday, November 28,2007 at ... New York. The presentation will be webcast live ...
... FOLD ) today announced that John F. Crowley, ... at the Lazard Capital,Markets Fourth Annual Healthcare Conference in ... ET at The New York Palace Hotel. A ... available to all,interested parties through the Investors section of ...
Cached Biology Technology:AMDL Launches New JPGreen Business Strategy 2Sangamo BioSciences to Present at the Piper Jaffray Health Care Conference 2Amicus Therapeutics to Present at the Lazard Capital Markets Fourth Annual Healthcare Conference 2Amicus Therapeutics to Present at the Lazard Capital Markets Fourth Annual Healthcare Conference 3
The F40 pump maintenance kit is used to service one F40 pump of a BioLogic DuoFlow workstation. It includes 2 piston seals, 4 check valves, seal removal tool, and 2 O-rings....
... HDAC8 Regulation of gene expression ... as DNA methylation, ATP-dependent chromatin remodeling, ... which include the dynamic acetylation and ... residues present in the tail of ...
...
Mouse monoclonal antibody raised against a partial recombinant PUM2. NCBI Entrez Gene ID = PUM2...
Biology Products: