Twiss and his colleagues documented very high concentrations of algae thriving in the water below the ice and even within the ice itself -- this despite dark conditions and cold temperatures that were a fraction of a degree above freezing and expected to inhibit microbial growth.
These remarkably high concentrations of algae in the surface water under the ice in winter exceed blooms of algae observed in the spring. The growth of algae in winter also removes nutrients from the water so that nutrients are lower by the time spring arrives.
Both of these observations have important implications to managing the Lake Erie sport and commercial fishery -- multi-million dollar industries in the United States and Canada.
The voyages were made possible through collaborations with the Canadian Coast Guard, which operates a Class 1 icebreaker on the lake in the winter, and the U.S. Environmental Protection Agency, which has a scientific research vessel that conducts scientific monitoring during ice-free seasons.
The research will help guide lake managers in Canada and the United States, as they consider winter conditions in attempting to understand the ecology of Lake Erie, one of five that comprise the North American Great Lakes. This collaborative research will also help the State of New York and its neighbors better manage water quality and ecosystem function in Lake Erie.
“Since Lake Erie is the shallowest of the Great Lakes, it is the both the coldest and warmest -- therefore, it is an important sentinel for climate change in the region and one we need to continue learning more about,” says Twiss.
Results of the study, "Diatoms abound in ice-covered Lake Erie: An investigation of offshore winter limnology in Lake Erie over the period 2007 to 2010," are reported by Michael Twiss, Mike McKay, Rick Bourbonniere, George Bullerjahn, Hunter Carrick, Ralph Smith, Jennifer Winter, Nigel D’souza, Paula Furey, Aubrey Lashaway, Matt Saxton and Steve Wilhelm in Volume 38, No. 1, of the Journal of Great Lakes Research, published by Elsevier, 2011.
The Journal of Great Lakes Research is published by the International Association for Great Lakes Research (IAGLR), a scientific organization made up of researchers studying the Laurentian Great Lakes, other large lakes of the world, and their watersheds, as well as those with an interest in such research. IAGLR members encompass all scientific disciplines with a common interest in the management of large lake ecosystems on many levels.
Clarkson University launches leaders into the global economy. One in five alumni already leads as a CEO, VP or equivalent senior executive of a company. Located just outside the Adirondack Park in Potsdam, N.Y., Clarkson is a nationally recognized research university for undergraduates with select graduate programs in signature areas of academic excellence directed toward the world’s pressing issues. Through 50 rigorous programs of study in engineering, business, arts, sciences and health sciences, the entire learning-living community spans boundaries across disciplines, nations and cultures to build powers of observation, challenge the status quo, and connect discovery and engineering innovation with enterprise.
Michael P. Griffin | Newswise Science News
Joint research project on wastewater for reuse examines pond system in Namibia
19.12.2016 | Technische Universität Darmstadt
Scientists produce a new roadmap for guiding development & conservation in the Amazon
09.12.2016 | Wildlife Conservation Society
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...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
10.01.2017 | Event News
09.01.2017 | Event News
05.01.2017 | Event News
17.01.2017 | Earth Sciences
17.01.2017 | Materials Sciences
17.01.2017 | Architecture and Construction