Navigation Links
USDA study confirms links between longer ragweed season and climate change
Date:2/22/2011

This release is available in Spanish.

WASHINGTON--Studies by a U.S. Department of Agriculture (USDA) scientist and cooperators have confirmed what many pollen-sensitive people already suspected: In some parts of North America, ragweed season now lasts longer and ends later.

Ragweed pollen in some parts of the northern United States and Canada now lingers almost a month longer than it did in 1995, and these increases are correlated to seasonal warming shifts linked to climate change dynamics in the higher latitudes, according to a study published Monday in the Proceedings of the National Academy of Sciences.

"One of the biggest challenges in studying climate change is finding out how the plant kingdom is adapting to increases in air temperature and other meteorological phenomena," said Agricultural Research Service (ARS) Administrator Edward B. Knipling. "Studies like this also show us that these ecological shifts don't stop at crop production. They can also have a significant impact on public health."

ARS is USDA's principal intramural scientific research agency, and this research supports the USDA priority of responding to climate change.

Assessments by the Intergovernmental Panel on Climate Change suggest that current and future increases in land-surface temperatures are more likely to occur at higher elevations and at higher latitudes. But definitive studies correlating warming temperatures, longer growing seasons, and increased plant pollination have been lacking.

Lewis Ziska, a plant physiologist with the ARS Crop Systems and Global Change Research Unit in Beltsville, Md., led a scientific team that identified 10 locations that had at least 15 years of data, from 1995 to 2009, on local ragweed pollen counts. These locations were along a north-south transect from Austin, Texas, to Saskatoon, Canada. The researchers compared the pollen data at each site to other site data, including latitude, the number of frost-free days, and delays in the onset of the first fall frost.

The researchers found that from 1995 to 2009, the number of frost-free days at higher-latitude study sites had increased, and so had the length of the ragweed pollen season. During that period, the pollen season lasted from 13 to 27 days longer than in 1995. They also found that a longer ragweed pollen season was strongly correlated with a delay in the onset of the first fall frost.


'/>"/>

Contact: Ann Perry
ann.perry@ars.usda.gov
301-504-1628
United States Department of Agriculture - Research, Education and Economics
Source:Eurekalert

Related medicine news :

1. Despite Treatment, Employees with Depression Generate Higher Absentee Costs, According to Thomson Reuters Study
2. American Council on Exercise (ACE) Study Reveals Kettlebells Provide Powerful Workout in Short Amount of Time
3. TV drama can be more persuasive than news program, study finds
4. Study carried out into biological risks of eating reptiles
5. Neuroimaging study may pave way for effective Alzheimers treatments
6. Study finds racial gaps continue in heart disease awareness
7. Luth Researchs IndicatorEDG(TM) Study Finds Americans Hopes of Achieving Their Dreams Are Fading
8. First blinded study of venous insufficiency prevalence in MS shows promising results
9. Soothing infants with food focus of childhood obesity study
10. People with anxiety disorder less able to regulate response to negative emotions, study shows
11. American Heart Association Rapid Access Journal Report: Study Finds Racial Gaps Continue in Heart Disease Awareness, Low Knowledge of Heart Attack Warning Signs Among Women
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/27/2016)... ... 2016 , ... This campaign aims to provide a path to improved education ... control and change. , As nearly 795,000 Americans suffering from a new or recurrent ... Plus, with an estimated 129,000 of these people dying from stroke, it’s become our ...
(Date:5/27/2016)... ... May 27, 2016 , ... Aimed at nurses and employees ... stories, courtesy of leaders in the nursing and health care industry. It also ... advocates and associations—namely Jones & Bartlett Learning. , Jones & Bartlett Learning is ...
(Date:5/26/2016)... ... May 26, 2016 , ... Despite last week’s media reports ... Yellen and company to wait until March 2017 for an interest rate increase, according ... Robinson College of Business. , “The Federal Open Market Committee (FOMC) dot charts are ...
(Date:5/26/2016)... (PRWEB) , ... May 26, 2016 , ... ... and clinical outcomes, hosted members and suppliers for its inaugural Member Conference at ... on their mission of elevating the operational health of America’s healthcare providers. , ...
(Date:5/26/2016)... Florida (PRWEB) , ... May 26, 2016 , ... ... House® Project offering a new model of care for living and healing, celebrated ... core values: Meaningful Life in a Real Home provided by Empowered Staff. , “This ...
Breaking Medicine News(10 mins):
(Date:5/26/2016)... , May 26, 2016   ... software and analytics, network solutions and technology-enabled ... announced it entered into a strategic channel ... of outpatient software solutions and revenue cycle ... specialty hospitals and rehabilitation clinics to optimize ...
(Date:5/25/2016)... GERMANTOWN, Maryland , May 25, 2016 ... bedient dringenden Bedarf zur ... QIAGEN N.V. (NASDAQ: QGEN ; Frankfurt ... und Entwicklungsvereinbarung mit Therawis Diagnostics GmbH zur Entwicklung ... zu sein. Ein erstes Projekt wird die Entwicklung ...
(Date:5/25/2016)... 2016 According to market research ... and Demand Forecast to 2022 - Industry Insights by ... published by P&S Market Research, the global insulin delivery ... and it is expected to grow at a CAGR ... pump segment is expected to witness the fastest growth ...
Breaking Medicine Technology: