Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Expanding forests darken the outlook for butterflies

19.07.2005


Changing environmental conditions in the Canadian Rockies are stifling the mating choices of butterflies in the region, say University of Alberta researchers.

Smaller and less abundant alpine meadows--largely the result of human activities--are diminishing the alpine butterfly gene pool, creating a pattern that could lead to the butterflies being less able to survive, said Dr. Jens Roland, a biological scientist at the University of Alberta and an author of a paper on the subject that has been published recently in Molecular Ecology.

Working with colleagues in the U of A Department of Biological Sciences, Roland and doctoral student Nusha Keyghobadi used samples of butterfly dispersal and genetic variability taken from the Kananaskis region in Alberta to show a correlation between less genetic diversity and smaller meadows.



According to Roland, the altitude of the tree line in the Canadian Rockies is rising--likely due to global warming--and, outside of national parks, forest fires are usually suppressed. These factors are combining to create larger forests and smaller alpine meadows. This is bad news for butterflies in the Rockies, such as the Parnasissus, which Roland studies, because they require two things that they can easily find in meadows: sunlight and stone crop.

Butterflies need sunlight to elevate their body temperatures in order to fly, and forests are generally too shady for them to travel through with quickness and ease. Parnasissus also need stone crop, a plant that grows in meadows and is the only suitable host for alpine butterfly larvae.

Therefore, alpine butterflies do not generally travel beyond the meadows they are born in, and the shrinking meadows could lead to inbreeding and the decreased diversity in the gene pool, Roland said.

"In general, inbreeding leads a species to be more vulnerable to a variety of mortality factors that lower survival rates," Roland explained. "This has been demonstrated for other species of butterflies."

Only a few species of butterflies are threatened in the Canadian Rockies, but many more are threatened in Europe, where the problem of shrinking alpine meadows is older and more acute. Roland believes the results of his study can inform conservation biologists in Europe to help them save their butterflies.

As for protecting the butterflies in the Canadian Rockies, Roland would like to see more prescribed burning of forests to increase the number and size of alpine meadows. However, unlike the park areas, the unprotected land areas are often used for commercial purposes and are therefore less likely to be allowed to burn.

"They do prescribed burning in the national parks for general maintenance, but they also do it to increase the meadow areas, which animals such as sheep and elk like to inhabit. The offshoot is that it also helps smaller animals, such as the butterflies," Roland said.

Ryan Smith | EurekAlert!
Further information:
http://www.ualberta.ca
http://www.biology.ualberta.ca/faculty/jens_roland/

More articles from Ecology, The Environment and Conservation:

nachricht Litter is present throughout the world’s oceans: 1,220 species affected
27.03.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung

nachricht International network connects experimental research in European waters
21.03.2017 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A Challenging European Research Project to Develop New Tiny Microscopes

The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.

To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Researchers shoot for success with simulations of laser pulse-material interactions

29.03.2017 | Materials Sciences

Igniting a solar flare in the corona with lower-atmosphere kindling

29.03.2017 | Physics and Astronomy

As sea level rises, much of Honolulu and Waikiki vulnerable to groundwater inundation

29.03.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>