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:3/30/2017)... Trends, opportunities and forecast in this market ... (fingerprint, AFIS, iris recognition, facial recognition, hand geometry, vein ... use industry (government and law enforcement, commercial and retail, ... others), and by region ( North America ... Pacific , and the Rest of the World) ...
(Date:3/27/2017)... CENTRE, N.Y. , March 27, 2017 /PRNewswire-USNewswire/ ... Healthcare Information and Management Systems Society (HIMSS) Analytics ... Outpatient EMR Adoption Model sm . In addition, ... 12% of U.S. hospitals using an electronic medical ... CHS for its high level of EMR usage ...
(Date:3/23/2017)... , March 23, 2017 The report "Gesture Recognition ... Biometric), Industry, and Geography - Global Forecast to 2022", published by MarketsandMarkets, the ... a CAGR of 29.63% between 2017 and 2022. ... ... ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... Dr. Bob Harman, founder and CEO of ... Rotary Club. The event entitled “Stem Cells and Their Regenerative Powers,” ... Dr. Harman, DVM, MPVM was joined by two human doctors: Peter B. Hanson, ...
(Date:10/10/2017)... CRUZ, Calif. , Oct. 10, 2017 ... grant from the NIH to develop RealSeq®-SC (Single Cell), ... kit for profiling small RNAs (including microRNAs) from single ... Analysis Program highlights the need to accelerate development of ... "New techniques for measuring ...
(Date:10/10/2017)... ... October 10, 2017 , ... The Pittcon Program Committee ... honoring scientists who have made outstanding contributions to analytical chemistry and applied ... the world’s leading conference and exposition for laboratory science, which will be held ...
(Date:10/9/2017)... ... October 09, 2017 , ... The award-winning American Farmer ... first quarter 2018. American Farmer airs Tuesdays at 8:30aET on RFD-TV. , With ... with the challenge of how to continue to feed a growing nation. At the ...
Breaking Biology Technology: