Navigation Links
TUM scientists document aquatic species decline at dams and weirs
Date:9/14/2011

Dams and weirs have a stronger impact on the ecosystem of watercourses than was previously realized. Species diversity in the dammed area upstream of weirs shows a significant decline: the diversity of fish species is one-quarter lower on average, and species diversity among invertebrates is up to 50 percent lower. The interruption of a river course thus has greater effects on the biodiversity than the geological origin of the river itself. Scientists from the Technische Universitaet Muenchen have demonstrated this on the basis of a survey of five rivers in the catchment areas of the Elbe, Rhine/Main, and Danube. Their analysis records, for the first time, both abiotic factors, for example chemical composition, current, and river bed substrate, and biotic factors, such as the number, size, and diversity of all important animal and plant groups on the two sides of weirs. The TUM researchers will present their findings, which have already been published online in the Journal of Applied Ecology, at the annual conference of the German Limnological Society, which takes place from September 12 to 16, 2011.

Whether it is done for the generation of electricity, for flood protection, or collection of drinking water, the damming of a river represents a drastic intervention in its ecosystem. Weirs and dams alter the chemical and physical characteristics of the water and the riverbed. Their construction is accompanied by a clear decline in upstream species diversity, and this is exacerbated by successive damming. This phenomenon, which is known as "serial discontinuity," has now been measured for all important animal and plant groups by system biologists from the TUM for the first time; the information available up to now concerned only individual taxonomic groups or species. The scientists carried out a systematic survey of the aquatic organisms on both sides of the weirs in five rivers of different geological origins. Their survey revealed a significant
'/>"/>

Contact: Undine Ziller
ziller@zv.tum.de
49-816-171-5403
Technische Universitaet Muenchen
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Scientists concerned about pesticide education funding
2. Scientists utilise breath and sweat to detect trapped humans
3. USC scientists generate first detailed map of human neuroreceptor
4. USC scientists probe connection between sight and touch in the brain
5. Biomedical/health informatics scientists to present cutting-edge science, health IT
6. Scientists offer way to address age-old questions
7. USC scientists identify key protein linked to acute liver failure
8. Scientists make turfgrass safer for animals, deadly for insects
9. Scripps Research scientists pinpoint shape-shifting mechanism critical to protein signaling
10. New cellular surprise may help scientists better understand human mitochondrial diseases
11. Scripps Research scientists establish new class of anti-diabetic compound
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/15/2014)... spreading rapidly and to an unexpected extent. The outbreak ... and the virus shows a new disease dynamic in ... this reason, the German National Academy of Sciences Leopoldina, ... and the Union of the German Academies of Sciences ... epidemic today. , In the statement the academies call ...
(Date:10/15/2014)... VILNIUS, Lithuania , Oct. 15, 2014 /PRNewswire/ ... identification technologies, today announced the availability of the ... . VeriLook Surveillance 3.0 provides real-time biometric face ... multiple high-resolution digital surveillance cameras. The new version ... detects and differentiates people from objects while they ...
(Date:10/14/2014)... house fly genome for the first time, revealing robust ... that thrives in pathogen-rich dung piles and garbage heaps. ... Genome Biology , will increase understanding of house ... adapt to resist insecticides, which could lead to novel ... and transmit more than 100 human and animal diseases, ...
Breaking Biology News(10 mins):Academies call for consequences from the Ebola virus epidemic 2Academies call for consequences from the Ebola virus epidemic 3Academies call for consequences from the Ebola virus epidemic 4Academies call for consequences from the Ebola virus epidemic 5VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 2VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 3House fly genome reveals expanded immune system 2
... commonly cultivated cacao plant in the world is revealed ... Researchers have utilised high quality DNA sequences to demonstrate the ... can lead to higher yielding cocoa plants that still produce better ... cacao tree ( Theobroma cacao L. ), but ...
... Plymouth University, and the Universidad Federal da Bahia in ... diversity and density of coral colonies off the coast ... El Nio event of 1997-98, creating an opportunity for ... major environmental incident of this nature can have on ...
... ecology has centered on the role of microbes in ... print in the journal Applied and Environmental Microbiology ... Australia, and collaborators show how changes in the populations ... at ecosystem levels. "Ecological theories developed for ...
Cached Biology News:Genome hints at markers for higher-producing, better-tasting chocolate 2Catastrophic climatic events leave corals facing a decade-long fight for recovery 2
(Date:10/20/2014)... Inc. (TSXV: BRM) ("Biorem" or "the Company") today announced four new ... and provides a good start to Q4.  The orders are for ... and one in the Middle East . ... Peter Bruijns , President & CEO. "Total bidding activity and ... have been for any complete year since the company has tracked ...
(Date:10/20/2014)... -- GenVec, Inc. (NASDAQ: GNVC ) today announced the ... board of directors effective on October 24, 2014.   Dr. Horovitz ... its chairman from June 2006 to November 2013.  During his ... and Audit Committees of the board.  "We ... service to GenVec, and its stockholders," said Wayne T. ...
(Date:10/20/2014)... PLAINSBORO, N.J. (PRWEB) October 20, 2014 ... that the Sidney Kimmel Cancer Center at Thomas ... program. , Through the Strategic Alliance Partnership ... and OncLive will collaborate to raise awareness of ... cancer treatment, and other projects. Clinicians and other ...
(Date:10/20/2014)... (PRWEB) October 20, 2014 Local veterinary ... in an investigational study of donor stem cells for ... stem cell therapy and has performed clinical stem cell ... study is to determine if a single injection of ... joints can help reduce pain and inflammation in the ...
Breaking Biology Technology:Zola P. Horovitz To Retire From GenVec Board 2Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 2Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 3Cascade Veterinary Referral Center Seeks Candidates for an Investigational Study of Stem Cells for Dogs with Arthritis 2
... Today, the rights to Verus,Pharmaceuticals, pediatric asthma ... for aerosol delivery were acquired by,AstraZeneca. Following ... 2006, this is the second major pharmaceutical ... in the development pipeline. Included in ...
... Sciences Company,s Leadership Team, INDIANAPOLIS, Sept. 24 ... short-term and long-term biomaterials storage,sample management and cold ... sciences leader, joins the company as vice president ... created position, Ball is responsible for the company,s,worldwide ...
... into Sample Analysis Systems-, PHILADELPHIA, Sept. ... nanoscale whole genome imaging and analytic,platforms for ... announced the issuance of a patent for ... analyzer. The patent covers a novel technique ...
Cached Biology Technology:Pediatric Asthma Programs Featuring PARI Pharma's eFlow Acquired by AstraZeneca 2BioStorage Technologies Appoints Lori Ball as Vice President 2BioStorage Technologies Appoints Lori Ball as Vice President 3BioNanomatrix Announces Issuance of Key Nanofluidics Patent Enabling Single Molecule Whole Genome Analysis 2BioNanomatrix Announces Issuance of Key Nanofluidics Patent Enabling Single Molecule Whole Genome Analysis 3
... Highly-purified, endotoxin-free plasmid DNA preparations ... plasmids in quantities from 1mg to ... well as large-scale (100mg-multi-gram) preparations are ... Each preparation is formulated according to ...
... polypeptide hormones which belong to the ... TGF- superfamily is a large group ... many aspects of development, reproductive function ... incude TGF-s, bone morphogenetic proteins, growth ...
... animal systems need to be able to handle ... access ports, as well as interface with telemetry ... and more, particularly with dogs, pigs, and primates. ... delayed starting time, and the computer can be ...
The new Silencer siRNA Starter Kit is perfect for researchers new to RNAi. It provides all of the reagents, protocols, and instructions necessary to get underway with siRNA transfection and ensure su...
Biology Products: