Navigation Links
Slight changes in climate may trigger abrupt ecosystem responses
Date:1/16/2009

Some of these responses, including insect outbreaks, wildfire, and forest dieback, may adversely affect people as well as ecosystems and their plants and animals.

The U.S. Geological Survey led a new assessment of the implications of a warming world on "ecological thresholds" in North America. The report, which was commissioned by the U.S. Climate Change Science Program and authored by a team of federal and academic climate scientists, is based on a synthesis of published scientific literature and addresses what research and steps are needed to help mitigate resulting effects.

An ecological threshold is the point at which there is an abrupt change in an ecosystem that produces large, persistent and potentially irreversible changes.

"One of our biggest concerns is that once an ecological threshold is crossed, the ecosystem in question will most likely not return to its previous state," said USGS Associate Director for Biology Susan Haseltine. "The existence of thresholds should be a key concern of scientists and natural resource managers."

The team also emphasized that human actions may increase an ecosystem's potential for crossing ecological thresholds. For example, additional human use of water in a watershed experiencing drought could trigger basic changes in aquatic life that may not be reversible. Researchers and decision makers need to develop the tools necessary to predict the effects of specific ecological disturbances and to understand early warning signals of impending ecological thresholds.

The report also concludes that although not enough is known about ecological thresholds, researchers do already know that ecosystems will differ significantly in their respective thresholds. More vulnerable ecosystems, such as those that already face stressors other than climate change, will almost certainly reach their threshold for abrupt change sooner.


'/>"/>

Contact: Colleen Charles
colleen_charles@usgs.gov
703-648-4110
United States Geological Survey
Source:Eurekalert

Page: 1

Related biology news :

1. Chesapeake Bay ecosystem health remains poor, but slightly improved in 2007
2. Old developmental pathways spawn revolutionary evolutionary changes
3. New study shows fish respond quickly to changes in mercury deposition
4. New study shows fish respond quickly to changes in mercury deposition
5. Great Plains historical stability vulnerable to future changes
6. New technique reveals subtle force-induced changes in biomolecules conformation
7. Tolerance to inhalants may be caused by changes in gene expression
8. A new explanation for evolutionary changes in genetic sex-determination systems
9. Hearing changes how we perceive gender
10. UC Davis bird-flu expert calls for changes in early-warning system
11. Elevated carbon dioxide changes soil microbe mix below plants
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/18/2017)... SUNNYVALE, Calif. , April 18, 2017  Socionext Inc., a ... prototype of a media edge server, the M820, which features the ... face recognition software provided by Tera Probe, Inc., will be showcased ... and at the NAB show at the Las Vegas ... ...
(Date:4/13/2017)... According to a new market research report "Consumer IAM Market by Solution ... Authentication Type, Deployment Mode, Vertical, and Region - Global Forecast to 2022", ... 14.30 Billion in 2017 to USD 31.75 Billion by 2022, at a ... ... MarketsandMarkets Logo ...
(Date:4/11/2017)... , April 11, 2017 No ... but researchers at the New York University Tandon ... of Engineering have found that partial similarities between ... systems used in mobile phones and other electronic ... The vulnerability lies in the fact ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... 10, 2017 , ... USDM Life Sciences , the ... sciences and healthcare industries, announces a presentation by Subbu Viswanathan and Jennifer Jaye ... GxP Validation for Agile Cloud Platforms,” will present a revolutionary approach to achieving ...
(Date:10/9/2017)... 2017  BioTech Holdings announced today identification and ... ProCell stem cell therapy prevents limb loss in ... demonstrated that treatment with ProCell resulted in more ... compared to standard bone marrow stem cell administration.  ... reduction of therapeutic effect.  ...
(Date:10/9/2017)... , ... October 09, 2017 , ... At its national ... Christopher Stubbs, a professor in Harvard University’s Departments of Physics and Astronomy, has been ... a member of the winning team for the 2015 Breakthrough Prize in Fundamental physics ...
(Date:10/9/2017)... , ... October 09, 2017 ... ... on October 5, 2017, in the medical journal, Epilepsia, Brain Sentinel’s SPEAC® ... gold standard, video EEG, in detecting generalized tonic-clonic seizures (GTCS) using surface ...
Breaking Biology Technology: