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:3/9/2016)... 9, 2016 This BCC Research report provides ... the RNA Sequencing (RNA Seq) market for the years ... tools and reagents, data analysis, and services. ... the RNA-Sequencing market such as RNA-Sequencing tools and reagents, ... factors affecting each segment and forecast their market growth, ...
(Date:3/3/2016)... 3, 2016  FlexTech, a SEMI Strategic Association Partner, ... Research & Development, Leadership in Education, and, in a ... 9 th year of the FLEXI Awards and ... individuals from past years . Judging was done ... set of criteria, by a panel of non-affiliated, independent, ...
(Date:3/2/2016)... March 2, 2016 ... the "Global Biometrics as a Service ... --> http://www.researchandmarkets.com/research/cmt3hk/global_biometrics ) has ... Biometrics as a Service Market 2016-2020" ... Research and Markets ( http://www.researchandmarkets.com/research/cmt3hk/global_biometrics ) ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... ... April 29, 2016 , ... Proove ... excited to announce the launch of the Proove Health Foundation . The ... education to promote the use of personalized medicine for tackling the nation’s most-pressing ...
(Date:4/29/2016)... York , April 29, 2016 ... published by Transparency Market Research "Separation Systems for ... Share, Growth, Trends, and Forecast 2015 - 2023", ... valued at US$ 10,665.5 Mn in 2014 and ... 6.8% from 2015 to 2023 to reach US$ ...
(Date:4/29/2016)... Louisville, KY and San Diego, CA (PRWEB) , ... April 29, ... ... the National Stem Cell Foundation (NSCF) to support the development of a patient-specific stem ... by Dr. Andrés Bratt-Leal in the lab of Dr. Jeanne Loring at The Scripps ...
(Date:4/29/2016)... 29, 2016 Elekta is pleased ... to its industry-leading treatment planning software, is available for ... Monaco version 5.11 provides significant performance speed ... speeds up to four times faster than in previous ... industry,s gold standard Monte Carlo ...
Breaking Biology Technology: