Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Global Warming Affects World's Largest Freshwater Lake

05.05.2008
Lake Baikal in Siberia had been thought resistant to climate change

Russian and American scientists have discovered that the rising temperature of the world's largest lake, located in frigid Siberia, shows that this region is responding strongly to global warming.

Drawing on 60 years of long-term studies of Russia's Lake Baikal, Stephanie Hampton, an ecologist and deputy director of the National Center for Ecological Analysis and Synthesis (NCEAS) in Santa Barbara, Calif., and Marianne Moore, a biologist at Wellesley College in Wellesley, Mass., along with four other scientists, report their results on-line today in the journal Global Change Biology.

"Warming of this isolated but enormous lake is a clear signal that climate change has affected even the most remote corners of our planet," Hampton said.

In their paper, the scientists detail the effects of climate change on Lake Baikal--from warming of its vast waters to reorganization of its microscopic food web.

"The conclusions shown here for this enormous body of freshwater result from careful and repeated sampling over six decades," said Henry Gholz, program director for NCEAS at the National Science Foundation (NSF), which funded the research. "Thanks to the dedication of local scientists, who were also keen observers, coupled with modern synthetic approaches, we can now visualize and appreciate the far-reaching changes occurring in this lake."

Lake Baikal is the grand dame of lakes. In 1996, the United Nations Educational, Scientific and Cultural Organization (UNESCO) declared it a World Heritage site because of its biological diversity. It boasts 2500 plant and animal species, with most, including the freshwater seal, found nowhere else in the world.

The lake contains 20 percent of the world's freshwater, and it is large enough to hold all the water in the United States' Great Lakes. It is the world's deepest lake as well as its oldest; at 25 million years old, it predates the emergence of humans.

In more recent times, it was a dedicated group of humans who made this study possible.

"Our research relies on a 60-year data set, collected in Lake Baikal by three generations of a single family of Siberian scientists," Moore said. "In the 1940s, Mikhail Kozhov began collecting and analyzing water samples in anticipation that this lake could reveal much about how lakes in general function.

"Ultimately, his daughter Olga Kozhova continued the program, followed by her daughter, who is also a co-author of today's paper: Lyubov Izmest'eva."

The decades-long research effort survived the reign of Stalin, the fall of the Soviet Union, and other social and financial upheavals in the region.

Data collection continued through every season, in an environment where winter temperatures drop to -50 degrees F.

The data on Lake Baikal reveal "significant warming of surface waters and long-term changes in the food web of the world's largest, most ancient lake," write the researchers in their paper. "Increases in water temperature (1.21°C since 1946), chlorophyll a (300 percent since 1979), and an influential group of zooplankton grazers (335 percent since 1946) have important implications for nutrient cycling and food web dynamics."

The scientists conclude that the lake now joins other large lakes, including Superior, Tanganyika and Tahoe, in showing warming trends.

"But," they note, "temperature changes in Lake Baikal are particularly significant as a signal of long-term regional warming.

"This lake was expected to be among those most resistant to climate change, due to its tremendous volume and unique water circulation."

The research paper is the result of a collaboration involving six Siberian and American scientists, who were assisted by student translators from Wellesley College.

In addition to Hampton and Moore, the paper's contributors are Izmest'eva, director of the Scientific Research Institute of Biology, Irkutsk State University, Irkutsk, Russia; Stephen L. Katz, recently of the Northwest Fisheries Science Center, NOAA Fisheries, Seattle, Wash.; Brian Dennis of the departments of statistics and fish and wildlife resources, University of Idaho, Moscow, Idaho; and Eugene A. Silow of the Scientific Research Institute of Biology, Irkutsk State University, Irkutsk, Russia.

Cheryl Dybas | EurekAlert!
Further information:
http://www.nsf.gov/mynsf/
http://www.nsf.gov/news/news_summ.jsp?cntn_id=111511&org=olpa&from=news

More articles from Ecology, The Environment and Conservation:

nachricht When corals eat plastics
24.05.2018 | Justus-Liebig-Universität Gießen

nachricht Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel

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: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

When corals eat plastics

24.05.2018 | Ecology, The Environment and Conservation

Surgery involving ultrasound energy found to treat high blood pressure

24.05.2018 | Medical Engineering

First chip-scale broadband optical system that can sense molecules in the mid-IR

24.05.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>