Navigation Links
Northern forests do not benefit from lengthening growing season
Date:1/12/2010

Forests in northern areas are stunted, verging on the edge of survival. It has been anticipated that climate change improves their growth conditions. A study published last week in Forest Ecology and Management journal shows that due to their genetic characteristics trees are unable to properly benefit from the lengthening growing season. Furthermore, the researchers were surprised to find that the mortality of established trees considerably promotes the adaptation of forests to the changing environment.

In cooperation with colleagues at the Universities of Oulu and Potsdam, Anna Kuparinen, Docent at the University of Helsinki's Faculty of Biological and Environmental Sciences, simulated forest growth from southern to northern Finland. A meteorological dispersal model was applied to describe the spread of pollen and seeds in the atmosphere. Above all, the results illustrate the slowness of the adaptation process.

Generally, trees stop growing before the frosts and this cessation of growth has been programmed in their genotype. Therefore, trees are unable to effectively follow the increasing environmental growing season. Instead, they cease growth as dictated by their genotype. It is estimated that after hundred years from now northern forests will substantially lag behind the speed of growth that would be enabled by their environment.

Evolution is promoted by the mortality of established trees

The researchers assumed that demographic characteristics of the trees would have a notable impact on their adaptability. Tree species differ for example so that birch matures at a considerably younger age than pine, and birch seeds spread more effectively than pine seeds. However, the results showed that these differences had only minor impacts. Instead, the mortality of established trees played a large role in the evolutionary adaptation.

The existing trees in northern forests will survive in a warmer climate better than before but, at the same time, they prevent genetically better adapted individuals from becoming more common. In a dense stand, old trees cast a shadow and prevent new seedlings from establishing. In this way, younger seedlings, which would be more suitable to warmer conditions, cannot easily progress beyond the sapling state.

A question closely related to environmental changes is, whether humans should help the populations to adapt? For forests, possible means of human aid include thinning and planting southern seeds to more northern locations.


'/>"/>

Contact: Anna Kuparinen, Docent
anna.kuparinen@helsinki.fi
358-407-313-120
University of Helsinki
Source:Eurekalert

Related biology news :

1. Scientists identify common HPV genotypes in northern India, encourage vaccination
2. Northern brown bears discovered feeding on whitefish runs
3. Chloride found at levels that can harm aquatic life in urban streams of the Northern US
4. Global warming increasing the dispersal of flora in Northern forests
5. Darwin anniversary heralds new conservation research era for Northern Ireland
6. Dried mushrooms slow climate warming in Northern forests
7. Arctic science conference to focus on northern sustainability
8. Scientists break record by finding northernmost hydrothermal vent field
9. Northern right whales head south to give birth, leave genetic fingerprints with NOAA researchers
10. Carbon sink capacity in northern forests reduced by global warming
11. Wildfire drives carbon levels in northern forests
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2017)... ITHACA, N.Y. , June 23, 2017 /PRNewswire/ ... leader in dairy research, today announced a new collaboration ... reduce the chances that the global milk supply is ... dairy project, Cornell University has become the newest academic ... Supply Chain, a food safety initiative that includes IBM ...
(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:4/18/2017)... a global expert in SoC-based imaging and computing solutions, has developed ... the company,s hybrid codec technology. A demonstration utilizing TeraFaces ® , ... showcased during the upcoming Medtec Japan at Tokyo Big Sight April ... Vegas Convention Center April 24-27. ... Click here for an image of the M820 ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... 2017 , ... A new study published in Fertility and ... in vitro fertilization (IVF) transfer cycles. The multi-center matched cohort study ... comparing the results from the fresh and frozen transfer cohorts, the authors of ...
(Date:10/10/2017)... CA (PRWEB) , ... October ... ... a development-stage cancer-focused pharmaceutical company advancing targeted antibody-drug conjugate (ADC) therapeutics, today ... of targeted HPLN (Hybrid Polymerized Liposomal Nanoparticle), a technology developed in collaboration ...
(Date:10/10/2017)... International research firm Parks Associates announced today that ... TMA 2017 Annual Meeting , October 11 in Scottsdale, ... security market and how smart safety and security products impact the competitive ... Parks Associates: Smart Home Devices: Main ... "The residential security market has experienced continued ...
(Date:10/10/2017)... ... 2017 , ... The Pittcon Program Committee is pleased to ... who have made outstanding contributions to analytical chemistry and applied spectroscopy. Each award ... conference and exposition for laboratory science, which will be held February 26-March 1, ...
Breaking Biology Technology: