Navigation Links
Climate may keep beautiful killer plant in check
Date:2/26/2010

The flowering plant - purple loosestrife - has been heading north since it was first introduced from Europe to the eastern seaboard 150 years ago. This exotic invader chokes out native species and has dramatically altered wetland habitats in North America. But it turns out it may have a vulnerability after all: the northern climate. Canadian scientists have found that adapting to the Great White North carries a severe reproductive penalty that may limit its spread.

Purple loosestrife (Lythrum salicaria) destroys wildlife habitats by displacing native vegetation that provides food, shelter, and breeding areas for wildlife. In urban areas, it invades ditches where it can block or disrupt water flow. It has few pests and diseases, resists various control methods, and plants can produce as many as 3 million seeds a year.

But as this invasive plant has spread north it has run into challenges posed by a shorter growing season, according to a study conducted by Robert Colautti, who recently obtained his Ph.D. from the University of Toronto's Department of Ecology and Evolutionary Ecology. The results are published online this week in the Proceedings of the Royal Society of London, series B (https://rspb.royalsocietypublishing.org/content/firstcit) and featured in Nature (http://www.nature.com/nature/journal/v463/n7284/full/4631002e.html).

The authors used modeling and experimental studies of 20 purple loosestrife populations along a 1200 km latitudinal gradient from Maryland to Timmins, Ontario, representing a one-month difference in growing season. They found that northern populations have become locally adapted and flower earlier in response to a shorter growing season. However, early flowering plants suffer a cost in terms of smaller size and reduced seed production. The reason: a genetic constraint.

"Genes that cause early flowering also reduce plant size, so early flowering and small size evolve together," says Colautti. "Smaller size results in lower seed production, which is likely to limit the spread of purple loosestrife in northern regions."


'/>"/>

Contact: Kim Luke
kim.luke@utoronto.ca
416-978-4352
University of Toronto
Source:Eurekalert

Related biology news :

1. NOAA, NASA and Old Dominion researchers measure impacts of changing climate on ocean biology
2. New insights into helping marine species cope with climate change
3. Understanding global climate change through new breakthroughs in polar research
4. New UC Davis study: Climate tipping points may arrive without warning, says top forecaster
5. Animals cope with climate change at the dinner table
6. New facility expected to clarify ecosystem responses to climate change
7. Oceans reveal further impacts of climate change, says UAB expert
8. According to new survey, Americans support strong climate, energy policies
9. Invasive plants are beneficiaries of climate change in Thoreaus woods
10. World Wetlands Day focuses on climate change
11. Effects of forest fire on carbon emissions, climate impacts often overestimated
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/9/2016)... Paris Police Prefecture ... solution to ensure the safety of people and operations in ... major tournament Teleste, an international technology group specialised ... today that its video security solution will be utilised by ... public safety across the country. The system roll-out is scheduled ...
(Date:6/2/2016)... The Department of Transport Management (DOTM) of ... project, for the , Supply and Delivery of ... Infrastructure , to Decatur , ... Management Solutions. Numerous renowned international vendors participated in the tendering ... selected for the most compliant and innovative solution. The contract ...
(Date:6/1/2016)... 2016 Favorable Government Initiatives Coupled ... Criminal Identification to Boost Global Biometrics System Market Through ... Research report, " Global Biometrics Market By Type, ... Opportunities, 2011 - 2021", the global biometrics market is ... account of growing security concerns across various end use ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Rolf ... join the faculty of the University of North Carolina Kenan-Flagler Business School ... and entrepreneurship at UNC Kenan-Flagler, with a focus on the school’s international efforts, ...
(Date:6/24/2016)... discussions on a range of subjects including policies, debt and ... Poloz. Speaking at a lecture to the Canadian ... to the country,s inflation target, which is set by both ... "In certain areas there needs to be ... why not sit down and address strategy together?" ...
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita Politecnica ... in people with peritoneal or pleural mesothelioma. Their findings are the subject of a ... , Diagnostic biomarkers are signposts in the blood, lung fluid or tissue of ...
(Date:6/23/2016)... , June 23, 2016   Boston Biomedical ... novel compounds designed to target cancer stemness pathways, ... been granted Orphan Drug Designation from the U.S. ... of gastric cancer, including gastroesophageal junction (GEJ) cancer. ... designed to inhibit cancer stemness pathways by targeting ...
Breaking Biology Technology: