Artificial wetlands can provide long-term benefits, study finds

Sponsored by

Mar. 7, 2012 -- A unique study of created wetlands is providing insights into the environmental benefits they provide and how these have changed over 15 years.

Wetlands created to replace those lost to environmental degradation or development take up carbon from the atmosphere and so potentially reduce greenhouse warming, the study suggests. Such artificial wetlands caused emissions of methane, which may contribute to warming, smaller than those from natural wetlands.

William J. Mitsch, of the University of Florida Gulf Coast University in Naples and his colleagues, describe the development of two 1-hectare wetlands in Ohio created by pumping water from the nearby Olentangy river, starting in 1994. One was manually planted with vegetation, and the other was left to develop naturally.

The results, reported in the March issue of BioScience, show that over time the manually planted and the unplanted wetlands differed principally in the variety of plants present and in how much gas they exchanged with the atmosphere. The manually planted wetland showed more variety, but the unplanted one took up more carbon from the atmosphere. Methane emissions from the unplanted wetland, unlike the planted one, meant that it was estimated to contribute slightly to net greenhouse warming. Both created wetlands, however, removed large amounts of nitrogen and phosphorus from the incoming river water. Emissions of nitrous oxide, which can also increase warming, were small.

This study may prove useful as a model for future wetland reclamation or replacement projects and for determining the amount of human intervention that is necessary for these projects to be successful. The article also provides an example of the benefits of long-term ecological research, since species diversity stabilized only after about five years, and the amount of carbon retained in the soil continued to increase over the entire study.

BioScience, published monthly, is the journal of the American Institute of Biological Sciences (AIBS; www.aibs.org). The article by Mitsch and colleagues is available during the month of March at http://www.aibs.org/bioscience-press-releases/

###

Sponsored by

TODAY'S HEADLINES

MWRD earns several Peak Performance Awards for water treatment compliance

The Metropolitan Water Reclamation District of Greater Chicago was recently recognized with seven prestigious awards from the National Association for Clean Water Agencies for its record in meeting compliance for water treatment.

American Water funding major R&D project to improve operations at treatment plants

American Water has received an $800,000 award to partially fund a $2-million, 2-year research and development project, alongside IOSight from the Israel-U.S. Binational Industrial Research and Development Foundation.

EPA orders North Las Vegas to address CWA violations in Las Vegas Wash

The Environmental Protection Agency has officially issued an order to the City of North Las Vegas, Nev., to immediately address federal Clean Water Act violations dealing with discharges of polluted water from its Water Reclamation Facility into the Las Vegas Wash.

Texas first state to receive aid from Gulf Coast RESTORE Trust Fund for centers of excellence

Texas has become the first state in the nation to receive funding from the Gulf Coast RESTORE Trust Fund through a federal award to finance two Centers of Excellence.

FOLLOW US ON SOCIAL MEDIA

  

 


© 2015. PennWell Corporation. All Rights Reserved. PRIVACY POLICY | TERMS AND CONDITIONS