The group, led by associate professor of biology Sophia Passy, also contends that recent increases in the level of organic matter in surface waters in regions of North America and Europe – also known as “brownification” – holds benefits for aquatic ecosystems.
A team of UTA biologists analyzed water samples in the Adirondack Forest Preserve.
The research team’s work appeared in the September issue of the journal Global Change Biology.
The team analyzed water samples collected in the Adirondack Forest Preserve, a six million acre region in northeastern New York. The Adirondacks have been adversely affected by atmospheric acid deposition with subsequent acidification of streams, lakes and soils. Acidification occurs when environments become contaminated with inorganic acids, such as sulfuric and nitric acid, from industrial pollution of the atmosphere.
Inorganic acids from the rain filter through poorly buffered watersheds, releasing toxic aluminum from the soil into the waterways. The overall result is loss of biological diversity, including algae, invertebrates, fish, and amphibians.
“Ecologists and government officials have been looking for ways to reduce acidification and aluminum contamination of surface waters for 40 years. While Clean Air Act regulations have fueled progress, the problem is still not solved,” Passy said. “We hope that future restoration efforts in acid streams will consider the use of wetlands as a natural source of stream health improvement.”
Working during key times of the year for acid deposition, the team collected 637 samples from 192 streams from the Black and Oswegatchie River basins in the Adirondacks. Their results compared biodiversity of diatoms, or algae, with levels of organic and inorganic acids. They found that streams connected to wetlands had higher organic content, which led to lower levels of toxic inorganic aluminum and decreased presence of harmful inorganic acids.
Passy joined the UT Arlington College of Science in 2001. Katrina L. Pound, a doctoral student working in the Passy lab, is the lead author on the study. The other co-author is Gregory B. Lawrence, of the USGS’s New York Water Science Center.
The study authors believe that as streams acidified by acidic deposition pass through wetlands, they become enriched with organic matter, which binds harmful aluminum and limits its negative effects on stream producers. Organic matter also stimulates microbes that process sulfate and nitrate and thus decreases the inorganic acid content.
These helpful organic materials are also present in brownification – a process that some believe is tied to climate change. The newly published paper said that this process might help the recovery of biological communities from industrial acidification.
Many have viewed brownification as a negative environmental development because it is perceived as decreasing water quality for human consumption.
“What we’re saying is that it’s not entirely a bad thing from the perspective of ecosystem health,” Pound said.
The UTA team behind the paper hopes that watershed development, including wetland construction or stream re-channeling to existing wetlands, may become a viable alternative to liming. Liming is now widely used to reduce acidity in streams affected by acid rain but many scientists question its long-term effectiveness.
The new paper is available online at http://onlinelibrary.wiley.com/doi/10.1111/gcb.12265/abstract.
Funding for Passy’s work was provided in part by the New York State Energy Research and Development Authority. The Norman Hackerman Advanced Research Program, a project of the Texas Higher Education Coordinating Board, as well as the US Geological Survey, the Adirondack Lakes Survey Corporation and the New York State Department of Environmental Conservation also provided support.
The University of Texas at Arlington is a comprehensive research institution of more than 33,000 students and more than 2,200 faculty members in the heart of North Texas. Visit www.uta.edu to learn more.
The University of Texas at Arlington is an Equal Opportunity and Affirmative Action employer.
Traci Peterson | EurekAlert!
Bioinvasion on the rise
15.02.2017 | Universität Konstanz
Litter Levels in the Depths of the Arctic are On the Rise
10.02.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport
Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...
The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...
Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
13.02.2017 | Event News
10.02.2017 | Event News
09.02.2017 | Event News
20.02.2017 | Materials Sciences
20.02.2017 | Health and Medicine
20.02.2017 | Health and Medicine