Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Wetlands could be key in revitalizing acid streams, UT Arlington researchers say

05.09.2013
A team of University of Texas at Arlington biologists working with the U.S. Geological Survey has found that watershed wetlands can serve as a natural source for the improvement of streams polluted by acid rain.

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!
Further information:
http://www.uta.edu
http://www.uta.edu/news/releases/2013/09/adirondacks-passypaper.php

More articles from Ecology, The Environment and Conservation:

nachricht International network connects experimental research in European waters
21.03.2017 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)

nachricht World Water Day 2017: It doesn’t Always Have to Be Drinking Water – Using Wastewater as a Resource
17.03.2017 | ISOE - Institut für sozial-ökologische Forschung

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: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>