Navigation Links
Climate warming may have unexpected impact on invasive species, Dartmouth study finds
Date:8/7/2014

Rising temperatures may be seen as universally beneficial for non-native species expanding northward, but a Dartmouth College study suggests a warmer world may help some invaders but hurt others depending on how they and native enemies and competitors respond.

The study, which sheds light on the uncertain relationship between climate change and invasive species, appears in the journal Ecology. A PDF of the study is available on request.

Climate change and invasive species rank among the largest predicted threats to global ecosystems over the next century, but they are typically treated independently. To date, research focusing on the connection between these two threats has primarily focused on the idea that species from lower latitudes, which typically experience warmer temperatures than those in higher latitude ecosystems, will perform better at higher latitudes as temperatures warm. The Dartmouth study focuses instead on how a trait common among certain invasive species -- benefiting from "enemy release" -- can be influenced by changes in temperatures. The ''enemy release'' hypothesis holds that certain invading species succeed because they escape from their natural enemies -- pathogens, parasites, herbivores and predators -- in their native habitat. The Dartmouth study's approach takes into account that invading species are attempting to establish in locations where other species already exist, and the interactions with these existing species are important to consider.

The researchers conducted a six-week experiment manipulating the presence of sunfish and water temperature using two non-native and native crustacean zooplankton. They found that increases in water temperature favored the non-native crustacean due its faster growth rate at higher temperatures, as well as the fact that sunfish predators of both crustaceans eat more at higher temperatures. The sunfish's increased appetite disproportionally benefits the non-native crustacean because it has more effective defenses against fish predation -- hence its "release" from this particular enemy -- than the native crustacean.

The results suggest that warming temperatures can affect the strength of "enemy release," which will alter the success of invading species. "But the direction of this effect depends on the physiology of the species present. As such, warming could increase or decrease the strength of 'enemy release' depending on the organisms that exist in a given location," says the study's lead author Samuel Fey, a visiting scholar at Dartmouth and a postdoctoral fellow at Yale University who recently received a Ph.D. from Dartmouth's Ecology and Evolutionary Biology program.


'/>"/>

Contact: John Cramer
John.Cramer@Dartmouth.edu
603-646-9130
Dartmouth College
Source:Eurekalert

Related biology news :

1. New study will help protect vulnerable birds from impacts of climate change
2. EU-funded study underlines importance of Congo Basin for global climate and biodiversity
3. UNH researchers find African farmers need better climate change data to improve farming practices
4. Fielding questions about climate change
5. Glacier-fed river systems threatened by climate change
6. Beating famine: Sustainable food security through land regeneration in a changing climate
7. Energy requirements make Antarctic fur seal pups vulnerable to climate change
8. Why spring is blooming marvelous (and climate change makes it earlier)
9. Carnegies Greg Asner named Energy/Climate Fellow by US State Department
10. Declines in Caribbean coral reefs pre-date damage resulting from climate change
11. Some corals like it hot: Heat stress may help coral reefs survive climate change
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/18/2017)... Inc., a global expert in SoC-based imaging and computing solutions, has ... features the company,s hybrid codec technology. A demonstration utilizing TeraFaces ® ... be showcased during the upcoming Medtec Japan at Tokyo Big Sight ... Las Vegas Convention Center April 24-27. ... Click here for an image of the ...
(Date:4/13/2017)... , April 13, 2017 UBM,s Advanced ... will feature emerging and evolving technology through ... Innovation Summits will run alongside the expo portion of ... sessions, panels and demonstrations focused on trending topics within ... advanced design and manufacturing event will take place June ...
(Date:4/11/2017)... GARDENS, Fla. , April 11, 2017 /PRNewswire/ ... management and secure authentication solutions, today announced that ... by Intelligence Advanced Research Projects Activity (IARPA) to ... IARPA,s Thor program. "Innovation has been ... and IARPA,s Thor program will allow us to ...
Breaking Biology News(10 mins):
(Date:5/19/2017)... ... May 19, 2017 , ... In response to the strong base ... Medical Systems, Inc. announces the release of their Gait Trainer 3 with an Integrated ... a biomedical system to aid in rehabilitating individuals with cerebral palsy, traumatic brain injury, ...
(Date:5/18/2017)... ... May 16, 2017 , ... Clinical Supplies Management (“CSM”), ... as the company continues to grow. CSM has doubled in size over the ... executing an aggressive growth strategy. , Roger Gasper joins CSM as Chief Financial Officer. ...
(Date:5/18/2017)... ... May 17, 2017 , ... ... process optimization firm for the life sciences and healthcare industries, is honored that ... Traceability for Medical Devices conference in Brussels, Belgium. , Crowley played a crucial ...
(Date:5/18/2017)... ... ... When James Sherley, was notified earlier this year that his company Asymmetrex had ... The Silicon Review , he was not surprised as others might be. Sherley ... recognition by Silicon Valley was particularly meaningful. Our selection by The Silicon ...
Breaking Biology Technology: