English

Main menu

Login



Bookmark Us

 
 
Impact
Ecological Impact: When with high abundance, zebra and quagga mussels can dramatically change the ecology of infested water bodies:
1. Their filtering activities result in: reduced concentrations of suspended solids and phytoplankton; alteration of phytoplankton community structure; increases in water transparency and macrophyte growth; zooplankton suppression.
2. Through their fouling activities the mussels can adversely impact benthic invertebrate communities - by interfering with their feeding, growth, movement, respiration, and reproduction.
3. Changes in fish populations can occur through colonisation of spawning grounds and the ability of a species to shift feeding behaviour to prey on zebra and quagga mussels.



dreis1
dreis2
dreis3

Dreissena polymorpha

on Anodonta, Danube River

Photo: Matej Polačik

Dreissena on S. woodiana,

Danube River, Ruse

Dreissena on Viviparus,

Danube River, Ruse

Photos: Lubomir Andreev

dreis4
dreis5
dreis6

Dreissena on Unio pictorum,

Veleka River


Dreissena polymorpha on

Viviparus, Rabisha Reservoir


Dreissena on

Unio pictorum, Veleka River

Photos: Lubomir Andreev


Economic Impact: As major biofoulers, zebra and quagga mussels can interfere with vital water supply intakes and navigation structures and thus affect thermoelectic and nuclear power plants, drinking water treatment plants, irrigation facilities and various industries.
vuzdeist
vuzdeist_1
vuzdeist_2

Rabisha Reservoir


at different water level

Photos: T. Trichkova

TEC_1_50
TEC_2_50
TEC_3_50

Maritsa East 2 TPP

Photos: T. Trichkova

Sadki_1_50
Sadki_2_50
Sadki_4_50

Ovcharitsa Reservoir

Photos: Diana Zaharieva

Zhrebchevo Reservoir

Photo: D. Kozuharov




 

This website is developed with support from the Bulgarian Science Fund, Ministry of Education, Youth and Science,
within the Project "Assessment and Management of Dreissena spp. Invasions in the Bulgarian Water Bodies",
Contract Number: DO-02-283/2008.

Tyxo.bg  counter