Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Pearly Mussels: One of North America’s Natural Jewels is Disappearing

13.05.2004


Eastern floater mussels are abundant in lakes and ponds throughout the Northeastern United States. The below illustration is from The Pearly Mussels of the New York State, written by David Strayer



If you have spent time boating or fishing in freshwater, there is a good chance you have encountered a pearly mussel. Elliptical in shape, with iridescent inner shells, humans have appreciated the animals since prehistoric times. Coveted for their pearls and mother-of-pearl shells; their meat has been a resource for both humans and wildlife. In a BioScience paper published this week, a team of scientists report that something troubling has been happening in our nation’s freshwaters— once-abundant pearly mussels are disappearing from the landscape.

Written by a team of seven mussel experts, the paper concludes that, "Many pearly mussel populations have a negative growth rate and are likely to disappear unless environmental conditions change." To protect the animals, the authors urge simultaneous research and conservation actions, among them increased research on mussel biology and the protection of mussel habitat.

Though humans have been interacting with mussels for millennia, there are large gaps in our understanding of their life history and the role they play in freshwater ecosystems. Lead author Dr. David L. Strayer, a freshwater ecologist at the Institute of Ecosystem Studies, remarks, "Pearly mussels are imperiled by human activities, such as pollution, dam construction, and channelization. Dozens of species are already extinct and well over a hundred species are in danger of disappearing. For many mussel species, without intervention, future populations will be limited to specimens in museum drawers."



Unique and highly specialized animals, mussels begin life as larvae before spending their adulthood as sedentary bivalves. Larvae, which are microscopic in size, parasitize a fish host before settling to the bottom of a freshwater ecosystem. Very specific in their choice of host, some mussels use elaborate lures to attract the correct fish species. In adulthood, pearly mussels act as filter feeders, eating plankton and other small particles of food suspended in the water.

Long-lived animals, most species live for decades. Currently, little is known about either mussel diets or the fascinating relationship between larvae and their fish hosts. As mussel beds decline in size, ecologists still don’t know the role that they play or what their absence might mean for the functioning of modern river ecosystems.

The loss of pearly mussels is especially troubling because, as long-lived aquatic organisms, they have the potential to reveal a world of information about the freshwater habitats they reside in. If we are to ensure mussels persist in the future, Dr. Strayer stresses, "We need to strengthen our understanding of their basic biology while minimizing human activities that have a known negative effect on populations. At the same time, we need to investigate how more subtle human activities, such as agriculture and suburbanization, impact freshwater systems."

Lori M. Quillen | Institute of Ecosystem Studies
Further information:
http://www.ecostudies.org/press/pearly_mussels.html

More articles from Ecology, The Environment and Conservation:

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

nachricht Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)

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: BAM@Hannover Messe: innovative 3D printing method for space flight

At the Hannover Messe 2018, the Bundesanstalt für Materialforschung und-prüfung (BAM) will show how, in the future, astronauts could produce their own tools or spare parts in zero gravity using 3D printing. This will reduce, weight and transport costs for space missions. Visitors can experience the innovative additive manufacturing process live at the fair.

Powder-based additive manufacturing in zero gravity is the name of the project in which a component is produced by applying metallic powder layers and then...

Im Focus: Molecules Brilliantly Illuminated

Physicists at the Laboratory for Attosecond Physics, which is jointly run by Ludwig-Maximilians-Universität and the Max Planck Institute of Quantum Optics, have developed a high-power laser system that generates ultrashort pulses of light covering a large share of the mid-infrared spectrum. The researchers envisage a wide range of applications for the technology – in the early diagnosis of cancer, for instance.

Molecules are the building blocks of life. Like all other organisms, we are made of them. They control our biorhythm, and they can also reflect our state of...

Im Focus: Spider silk key to new bone-fixing composite

University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.

Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.

Im Focus: Writing and deleting magnets with lasers

Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...

Im Focus: Gamma-ray flashes from plasma filaments

Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.

The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
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

IWOLIA: A conference bringing together German Industrie 4.0 and French Industrie du Futur

09.04.2018 | Event News

 
Latest News

Quantum Technology for Advanced Imaging – QUILT

24.04.2018 | Information Technology

AWI researchers measure a record concentration of microplastic in arctic sea ice

24.04.2018 | Earth Sciences

Complete skin regeneration system of fish unraveled

24.04.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>