HOME >> BIOLOGY >> NEWS
Bright autumn colouration in trees - a warning signal to insects?

Most deciduous trees change colour in autumn. However, both within and between species, there is considerable variation both in the timing and magnitude of autumn colour change. Hamilton and Brown recently proposed a hypothesis to explain this phenomenon.

Their idea was that the bright autumn colouration in trees is a warning signal to insects about investment in chemical defence. In the forthcoming issue of Ecology Letters, Hagen, Jakobsen and Folstad present the first empirical test of this autumn signalling hypothesis.

They show that in mountain birch, increasing degree of autumn colouration in September is associated with a reduction in leaf damage from insects the following season, indicating that the most autumn coloured trees might have been less exposed to egg-laying insects.

This result is consistent with the idea that bright autumn colouration is a warning signal directed towards insects in search of favourable hosts for their progeny.


'"/>

Contact: Kate Stinchcombe
kate.stinchcombe@oxon.blackwellpublishing.com
Blackwell Publishing Ltd.
10-Oct-2003


Page: 1

Related biology news :

1. Bright idea could doom cancer and viruses, say Purdue scientists
2. Brightness discrimination in the dog
3. Bright beaks provide honest look at male immune system, Science study says
4. New Device Brightens Recycling Efforts
5. Testing Sought For Brighteners, Natural Substance In Spices, Cosmetic Chemical, Three Herbs, A Natural Oil And A Fertilizer
6. As autumn approaches, this chickadees brain begins to expand
7. Study: Emission of smog ingredients from trees is increasing rapidly
8. Plumbing trees plumbing reveals their engineering skill
9. An exotic grass kills trees by hijacking their water
10. Duke study disputes idea that trees can relocate quickly in response to climate change
11. Limited climate tracking in European trees despite 10,000 years of postglacial warmth

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/14/2017)... (NYSE: IBM ) is introducing several innovative partner startups ... collaboration between startups and global businesses, taking place in ... nine startups will showcase the solutions they have built with ... France is one of the ... percent increase in the number of startups created between 2012 ...
(Date:5/16/2017)... 16, 2017   Bridge Patient Portal , ... MD EMR Systems , an electronic medical ... GE, have established a partnership to build an ... the GE Centricity™ products, including Centricity Practice Solution ... These new integrations will allow healthcare delivery ...
(Date:4/19/2017)... New York , April 19, 2017 ... competitive, as its vendor landscape is marked by the ... the market is however held by five major players ... Safran. Together these companies accounted for nearly 61% of ... of the leading companies in the global military biometrics ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... platform specifically designed for life science researchers to analyze and interpret datasets, ... Franklin, who made a major contribution to the discovery of the double-helix ...
(Date:10/11/2017)... ... ... Personal eye wash is a basic first aid supply for any work environment, but most ... you rinse first if a dangerous substance enters both eyes? It’s one less decision, and ... unique dual eye piece. , “Whether its dirt and debris, or an acid or alkali, ...
(Date:10/11/2017)... , Oct. 11, 2017  VMS BioMarketing, a leading ... a nationwide oncology Clinical Nurse Educator (CNE) network, which will ... need for communication among health care professionals to enhance the ... nurses, office staff, and other health care professionals to help ... breast cancer. ...
(Date:10/11/2017)... ... October 11, 2017 , ... ... implantation and pregnancy rates in frozen and fresh in vitro fertilization (IVF) ... and maternal age to IVF success. , After comparing the results from the ...
Breaking Biology Technology:
Cached News: