News & Events
Taller plants slowly replacing short grasses, bushes in North
Adjunct professor Jill Johnstone with willow and root. (Photo: Jonathan Henkelman)
Research on the Arctic biome, based on data gathered from 117 tundra sites, shows that taller plant species are slowly taking over as the circumpolar region warms up rapidly, changing the habitat of species such as caribou and affecting the productivity of plants such as cranberries.
Jill Johnstone, an adjunct professor in biology in the College of Arts and Science at the University of Saskatchewan, was among nearly 130 international scientists who recently co-authored a paper in the journal Nature investigating the relationships between tundra temperature, soil moisture and important plant traits.
“The main impact of this research is that it helps us better predict the when, where, and how of vegetation changes in the Arctic,” said Johnstone.
“Anticipating areas where vegetation is likely to change most rapidly in the North could help us prioritize strategies to conserve habitat for important wildlife species such as barren ground caribou or nesting Arctic birds.”
Researchers found that climate warming appears to be responsible for the observed broad-scale changes in tundra vegetation over the past three decades, especially in wetter locales.
“Our study highlights the importance of accounting for future changes in water availability, as this will probably influence both the magnitude and direction of change for many traits,” states the paper.
Researchers found that low-growing grasses and short shrubs are giving way to new, taller species, said Johnstone.
In the Canadian North, for example, taller species such as willow shrubs or birches and grasses such as polar grass or reed grass are replacing some low-lying species of willows and dwarf grasses such as Arctic dwarf willow and alpine sweet grass, she said.
Johnstone has been monitoring tundra vegetation changes in the high altitude regions of Wolf Creek, near Whitehorse, Yukon, since 1997, as well as sites on Herschel Island, Yukon, and Ellesmere Island in the Northwest Territories. Her contribution to the paper was principally funded by NSERC.
Nature article: https://www.nature.com/articles/s41586-018-0563-7
Global News: USask research on apparent hungry slugs reveals new timeline for life on Earth
Posted on 2019-02-20
Research on African fossils involving the University of Saskatchewan suggests organisms on Earth were capable of movement 2.1 billion years ago
College of Arts and Science faculty, alumni shortlisted for Saskatchewan Book Awards
Posted on 2019-02-19
Awards ceremony will be held on April 27, 2019, at the Conexus Arts Centre in Regina
Spherical display brings virtual collaboration closer to reality
Posted on 2019-02-19
USask and UBC researchers have developed a ball-shaped VR display that supports up to two users at a time
Fossils show evidence of earliest moving creatures
Posted on 2019-02-15
Researchers at the University of Saskatchewan (USask) have helped uncover the earliest evidence ever found of organisms capable of movement
A Celebration of Women in Astronomy
Posted on 2019-02-13
The public lecture will be held on International Women's Day
Finding inspiration in innovation
Posted on 2019-02-08
Dr. Leila Dehabadi (PhD) came to USask from Iran to conduct innovative chemistry research with industry applications