HOME >> BIOLOGY >> NEWS
Loss of hemlocks will affect water dynamics in southern Appalachian forests

Forest Service (FS) research has provided the first estimates on the impact the loss of eastern hemlock will have on the water dynamics of the southern Appalachian mountains. In the June 2007 issue of Ecological Applications, researchers Chelcy Ford and Jim Vose from the FS Southern Research Station (SRS) Coweeta Hydrologic Laboratory present findings on eastern hemlock rates of transpiration (the amount of soil water taken up by trees) from a 2-year study in western North Carolina.

Eastern hemlock, a keystone species in the streamside forests in the southern Appalachian region, is already experiencing widespread decline and mortality and may be decimated by the hemlock woolly adelgid (a tiny nonnative insect) within the next 10 years. As a native evergreen capable of maintaining year-round transpiration rates, eastern hemlock plays an important role in the ecology and hydrology of mountain ecosystems. Hemlocks provide critical habitat for birds and other animals; their shade helps maintain the cool water temperatures required by trout and other aquatic organisms in mountain streams.

No other native evergreen in the southern Appalachians will likely fill the ecohydrological role of eastern hemlock if widespread mortality occurs, says Ford, ecologist with the Otto, NC unit where Vose is project leader. With the loss of this species, we predict changes to streamflow, streamside forest structure, and soil moisture that will have to be addressed by land managers.

Hemlock woolly adelgids attach themselves to the base of the needles of the eastern hemlock, feeding on carbon fixed by the trees, slowing growth and causing the needles to drop. Needle loss causes the crown of the tree to thin and dieback in branches; in a surprisingly short timeusually 5 to 10 yearsthe tree fades away and dies.

To estimate the impact the loss of hemlock will have on the water balance, the researchers measured transpiration rates over a range of t
'"/>

Contact: Chelcy Ford
crford@fs.fed.us
828-524-2128
Southern Research Station - USDA Forest Service
9-Jul-2007


Page: 1 2

Related biology news :

1. Strength of connections between brain regions may affect an adolescents response to peer influence
2. Pediatric ritalin use may affect developing brain, new study suggests
3. Brightly colored birds most affected by Chernobyl radiation
4. Common environmental chemicals in diet affect fetal ovarian development
5. New clue why MS affects African-Americans differently than Caucasians
6. Sleep deprivation affects airport baggage screeners ability to detect rare targets
7. Economic impact of hunger affects all Americans
8. Sexual orientation affects how we navigate and recall lost objects, but age just targets gender
9. How does day length affect aggression in mice? Its in the genes
10. Growing nerve cells in 3-D dramatically affects gene expression
11. Journal details how global warming will affect the worlds fisheries

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


(Date:7/17/2019)... ... 15, 2019 , ... RCH Solutions (RCH), a ... companies, announces the availability of new specialty advisory practice, a Public Cloud Managed ... emerging bio-pharma companies interested in achieving specific outcomes related to public Cloud adoption. ...
(Date:7/9/2019)... ... July 09, 2019 , ... ... Research into its incubator program. The founder and CEO of Tx Genetic, Helen ... lives of those suffering from epithelial connective tissue disorders. , “We are pleased ...
(Date:6/25/2019)... ... 25, 2019 , ... ActX has launched a medical genetic ... 23andMe, customers can get access to professionally reviewed genetic screening similar to what ... and Health + Ancestry customers., With the ActX + 23andMe service, both 23andMe ...
Breaking Biology News(10 mins):
(Date:7/17/2019)... ... 16, 2019 , ... Quidel is the market leader in ... Roche and Siemens Healthineers and Response Biomedical also are among the top companies. ... Point-of-Care (POC) Diagnostics . , Quidel is a market leader in rapid immunoassays ...
(Date:6/26/2019)... ... , ... Alice Branton today released research results from preclinical trials on the ... can prove to be beneficial for treating Hypomagnesemia. , The preclinical trial shows:, ... size , Over 142% increase in particle size , Over ...
(Date:6/11/2019)... JUPITER, Fla. (PRWEB) , ... June 10, 2019 ... ... breakthroughs in science and technology in an upcoming episode, scheduled to broadcast 4Q/2019. ... of the Eppendorf Group) and will educate viewers about how its technology facilitates ...
(Date:6/6/2019)... ... 2019 , ... WCCT Global, Inc ., a full-service early phase contract ... will be receiving 3 awards at the 2019 CRO Leadership Awards, to be held ... categories of overall Quality and Compatibility (Access to desired markets, cultural fit, timely project ...
Breaking Biology Technology:
Cached News: