“Removal of beaver should be considered an environmental disturbance on par with in-filling, peat mining and industrial water extraction,” said researcher Glynnis Hood, lead author on the study and an assistant professor of Environmental Sciences at the University of Alberta’s Augustana Campus in Camrose, Canada.
In examining how beaver influenced some of Alberta’s wetlands in Elk Island National Park over a 54-year period, Hood and her co-investigator, Professor Suzanne Bayley, discovered that the presence of beaver and their dams increased by up to nine times, the presence of open water.
Climate models predict the incidence of drought in parts of North America will increase in frequency and length over the next 100 years, and beaver will likely play an important role in maintaining open water and mitigating the impact, Hood said. The infilling and drainage of wetlands has increased to make way for urban and industrial expansion, and beaver colonies are being removed both inside and outside of protected areas, which means a continued loss of water resources, Hood noted.
“In times of drought they may be one of the most effective ways to mitigate wetland loss,” said Hood. “Some people believe climate is driving everything, but the presence of beaver has a dramatic effect on the availability of open water in an area. Beaver are helping to keep water in areas that would otherwise be dry.” Even during drought, where beaver were present, there was 60 per cent more open water than those same areas during previous drought periods when beaver were absent.
The study, published recently in the online edition of Biological Conservation, also found that temperature, precipitation and other climate variables were much less important than beaver in maintaining open water areas in the wetlands of the mixed-wood boreal forest.
The role of beaver in sustaining open water is critical for several reasons. Flooding caused by beaver dams provides habitat and water resources used by land animals and amphibians, and even provides water for livestock. It can also recharge groundwater reserves.
Bev Betkowski | EurekAlert!
A new indicator for marine ecosystem changes: the diatom/dinoflagellate index
21.08.2017 | Leibniz-Institut für Ostseeforschung Warnemünde
Value from wastewater
16.08.2017 | Hochschule Landshut
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
22.08.2017 | Earth Sciences
22.08.2017 | Health and Medicine
21.08.2017 | Materials Sciences