Navigation Links
Invading species can extinguish native plants despite recent reports
Date:1/9/2013

TORONTO, ON Ecologists at the University of Toronto and the Swiss Federal Institute of Technology Zurich (ETH Zurich) have found that, given time, invading exotic plants will likely eliminate native plants growing in the wild despite recent reports to the contrary.

A study published in Proceedings of the National Academy of Sciences (PNAS) reports that recent statements that invasive plants are not problematic are often based on incomplete information, with insufficient time having passed to observe the full effect of invasions on native biodiversity.

"The impacts of exotic plant invasions often take much longer to become evident than previously thought," says Benjamin Gilbert of U of T's Department of Ecology & Evolutionary Biology (EEB) and lead author of the study. "This delay can create an 'extinction debt' in native plant species, meaning that these species are slowly going extinct but the actual extinction event occurs hundreds of years after the initial invasion."

Much of the debate surrounding the threat posed to biodiversity by the invasions of non-native species is fueled by recent findings that competition from introduced plants has driven remarkably few plant species to extinction. Instead, native plant species in invaded ecosystems are often relegated to patchy, marginal habitats unsuitable to their nonnative competitors.

However, Gilbert and co-author Jonathan Levine of ETH Zurich say that it is uncertain whether the colonization and extinction dynamics of the plants in marginal habitats will allow long-term native persistence.

"Of particular concern is the possibility that short term persistence of native flora in invaded habitats masks eventual extinction," says Levine.

The researchers conducted their research in a California reserve where much of the remaining native plant diversity exists in marginal areas surrounded by invasive grasses. They performed experiments in the reserve and coupled their results with quantitative models to determine the long term impacts of invasive grasses on native plants.

"Invasion has created isolated 'islands of native plants' in a sea of exotics," says Gilbert. "This has decreased the size of native habitats, which reduces seed production and increases local extinction. It also makes it much harder for native plants to recolonize following a local extinction."

"Our research also allows us to identify how new habitats for native flora could be created that would prevent extinction from happening. These habitats would still be too marginal for invaders, but placed in such a way as to create 'bridges' to other habitat patches," says Gilbert.


'/>"/>

Contact: Sean Bettam
s.bettam@utoronto.ca
416-946-7950
University of Toronto
Source:Eurekalert  

Related biology news :

1. A new invading sea crab reaches the Ebro Delta
2. Low extinction rates made California a refuge for diverse plant species
3. A new fish species from Lake Victoria named in honor of the author of Darwins Dreampond
4. News for conservationists: Scientists challenge ideas about natural habitats and species diversity
5. 2 new species of orchid found in Cuba
6. Discovery of Africa moth species important for agriculture, controlling invasive plants
7. Plumes across the Pacific deliver thousands of microbial species to West Coast
8. Boreal bird species of conservation concern affected by climate change
9. 3 new species of venomous primate identified by MU researcher
10. Discovered! The new species of Borneos enigmatic primate with a toxic bite
11. Galapagos tortoises are a migrating species
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Invading species can extinguish native plants despite recent reports
(Date:6/14/2017)... -- IBM (NYSE: IBM ) is introducing several innovative partner ... developing collaboration between startups and global businesses, taking place in ... event, nine startups will showcase the solutions they have built ... France is one of ... 30 percent increase in the number of startups created between ...
(Date:5/16/2017)... TEANECK, N.J. , May 16, 2017  Veratad ... leading provider of online age and identity verification solutions, ... the K(NO)W Identity Conference 2017, May 15 thru May ... Ronald Regan Building and International Trade Center. ... across the globe and in today,s quickly evolving digital ...
(Date:5/6/2017)... RAM Group , Singaporean based ... in biometric authentication based on a novel  ... to perform biometric authentication. These new sensors are based on ... Ram Group and its partners. This sensor will have ... and security. Ram Group is a next generation ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... (PRWEB) , ... October 11, 2017 , ... Personal eye wash is a basic first ... eye at a time. So which eye do you rinse first if a dangerous substance ... Plum Duo Eye Wash with its unique dual eye piece. , “Whether its ...
(Date:10/11/2017)... LAGUNA HILLS, Calif. , Oct. 11, 2017 /PRNewswire/ ... London (ICR) and University of ... tool to risk-stratify patients with multiple myeloma (MM), in a ... . The University of Leeds is ... Myeloma UK, and ICR will perform the testing services to ...
(Date:10/10/2017)... ... October 10, 2017 , ... San Diego-based team building and cooking events company, ... today. The bold new look is part of a transformation to increase awareness, ... significant growth period. , It will also expand its service offering from its signature ...
(Date:10/10/2017)... 10, 2017 International research firm Parks Associates announced ... at the TMA 2017 Annual Meeting , October 11 in ... residential home security market and how smart safety and security products impact ... Parks Associates: Smart Home ... "The residential security market has ...
Breaking Biology Technology: