| Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
|
8235
|
Dreissena bugensis
|
Environmental Water Quality
|
Observational
|
Field
|
In Lake Michigan, the fraction of water column cleared (FC) was measured experimentally for quagga mussels (Dreissena bugensis) in 2007-2008 and determined to exceed the phytoplankton growth rate at depths of 30-50 m, likely by a factor of five. This excessive filtration is hypothesized to cause a mid-depth sink of carbon and phosphorous; this is similar to the nearshore phosphorous shunt caused by zebra mussels, except that it occurs at mid-depth levels where quagga mussel densities are high.
|
Lake Michigan, USA
|
24635
|
|
8236
|
Dreissena bugensis
|
Environmental Water Quality
|
Observational
|
Field
|
In Lake Michigan, total phosphorus (TP) and mean chlorophyll a concentrations both markedly fell in spring seasons after the expansion of quagga mussels (Dreissena bugensis), and TP levels remained low into summer.
|
Lake Michigan, USA
|
24629
|
|
8237
|
Dreissena bugensis
|
Environmental Water Quality
|
Observational
|
Field
|
Dramatic increases in summer silica were initiated in the early 2000s in Lake Huron and in 2004 in Lake Michigan and seem to be associated with the expansion of quagga mussel (Dreissena bugensis) populations in the lakes at those times
|
Lake Michigan, USA
|
24582
|
|
8238
|
Dreissena bugensis
|
Environmental Water Quality
|
Observational
|
Field
|
Lake Michigan water transparency, which ranged from 74-85% at deepwater sites in 2001, increased to 94-96% in 2008 following quagga mussel (Dreissena bugensis) expansion
|
Lake Michigan, USA
|
24627
|
|
8239
|
Dreissena bugensis
|
Environmental Water Quality
|
Anecdotal
|
N/A
|
High water filtration rates and high dreissenid (Dreissena bugensis) abundances have also lead to the accumulation of pseudofeces
|
|
13247
|
|
8240
|
Dreissena bugensis
|
Environmental Water Quality
|
Experimental
|
Laboratory
|
Through nitrogen and phosphorus remineralization, the production of biodeposits from Dreissena bugensis may increase and redirect nutrient supply and turnover in colonized areas
|
|
24623
|
|
8241
|
Dreissena bugensis
|
Environmental Water Quality
|
Experimental
|
Field
|
When high-density dreissenid (Dreissena bugensis) colonies form, nitrate (NO3-) concentrations may significantly increase in the interstitial water at the colony base while dissolved oxygen concentrations drop, creating potentially detrimental conditions for some benthic organisms
|
|
20415
|
|
8242
|
Dreissena bugensis
|
Environmental Water Quality
|
Experimental
|
Laboratory
|
Concurrently, dreissenid metabolic activity may lower the nitrogen:phosphorus ratio in the water column, which (along with selective feeding behavior of dreissenids) appears to favor the growth of toxic cyanobacteria (Microcystis spp.)
|
|
24580
|