Ponds in the Arctic tundra are shrinking and slowly disappearing, according to a new study by University of Texas at El Paso (UTEP) researchers.
More than 2,800 Arctic tundra ponds in the northern region of Alaska’s Barrow Peninsula were analyzed using historical photos and satellite images taken between 1948 and 2010. Over the 62-year period, the researchers found that the number of ponds in the region had decreased by about 17 percent, while pond size had shrunk by an average of one-third.
“The 17 percent is a very conservative estimate because we didn’t consider ponds that had divided, or split into two ponds,” explained Christian Andresen, Ph.D., a postdoctoral fellow at UTEP who led the study. “Some ponds are elongated and as they shrink over time, they can be divided into two or more smaller ponds.”
The study, which has been accepted for publication in the Journal of Geophysical Research: Biogeosciences, was conducted by Andresen and Associate Professor of Biological Sciences Vanessa Lougheed, Ph.D.
The team points to warming temperatures and encroaching plants as one of the reasons the ponds are disappearing. As temperatures rise, nutrient-rich permafrost — a frozen layer of soil — thaws, releasing nutrients into ponds and enhancing plant growth.
“Plants are taking over shallow ponds because they’re becoming warm and nutrient-rich,” Andresen said. “Before you know it, boom, the pond is gone.”
Andresen worries that the geomorphology of the region’s landscape will change if these small bodies of water continue to shrink.
“The role of ponds in the arctic is extremely important,” he said. “History tells us that ponds tend to enlarge over hundreds of years and eventually become lakes; ponds shape much of this landscape in the long run, and with no ponds there will be no lakes for this region.”
Ponds in the Barrow Peninsula also serve as a major food source and nesting habitat for migratory birds, including certain waterfowl on the threatened species list, such as the spectacled eider (Somateria fischeri) and Steller’s eider (Polysticta stelleri). If the aquatic system continues to shift toward a drier community, their vital summer feeding and nesting grounds could disappear, affecting the future of these and many other migratory species.
Veronique Masterson | newswise
New Study Will Help Find the Best Locations for Thermal Power Stations in Iceland
19.01.2017 | University of Gothenburg
Water - as the underlying driver of the Earth’s carbon cycle
17.01.2017 | Max-Planck-Institut für Biogeochemie
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
19.01.2017 | Earth Sciences
19.01.2017 | Life Sciences
19.01.2017 | Physics and Astronomy