|
| Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
|
3844
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Anecdotal
|
N/A
|
dominant pairwise interaction classified as predation
|
Great Lakes
|
13595
|
|
4576
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Anecdotal
|
Field
|
Decrease in abundance of yellow perch Perca flavescens maybe be attributed to the colonization of Bythotrephes longimanus in Lake Erie waters.
|
Lake Erie
|
36919
|
|
4601
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Experimental
|
Laboratory
|
In a laboratory study, the surface-dwelling Daphnia mendotae migrated to deeper and colder regions of the water column while in the presence of Bythotrephes longimanus kairomones. This resulted in a 36% reduction in somatic growth of Daphnia mendotae over a 4-day period.
|
Michigan
|
24424
|
|
4643
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
Field observations in Lake Michigan suggest that Bythotrephes longimanus may facilitate downward vertical migration of zooplankton communities.
|
Lake Michigan
|
24422
|
|
4644
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
Field observations in Lake Michigan suggest that Bythotrephes longimanus may facilitate downward vertical migration of zooplankton communities.
|
Lake Michigan
|
24422
|
|
4657
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Experimental
|
Field
|
When Bythotrephes longimanus production peaked during the summer months, consumption of zooplankton exceeded its production rate by 20% in Harp Lake.
|
Michigan
|
20507
|
|
4658
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Experimental
|
Field
|
When Bythotrephes longimanus production peaked during the summer months, consumption of zooplankton exceeded its production rate by 20% in Harp Lake.
|
Michigan
|
20507
|
|
4659
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Experimental
|
Field
|
Production of zooplankton sharply declined when Bythotrephes longimanus concentrations peaked in Harp Lake.
|
Michigan
|
20507
|
|
4660
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Experimental
|
Field
|
Production of zooplankton sharply declined when Bythotrephes longimanus concentrations peaked in Harp Lake.
|
Michigan
|
20507
|
|
4661
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Experimental
|
Field
|
Large seasonal loss of Tropocyclops extensus was observed as a result of predation by Bythotrephes longimanus.
|
Michigan
|
20507
|
|
4663
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
Following the invasion of Bythotrephes in Harp Lake in 1993, changes in species composition and size distribution of zooplankton communities was noted. Larger species like Diamesa mendotae and Holopedium gibberum increased in abundance and smaller species like Bosmina longirostris, Diaphanosoma birgei, Tropocyclops extensus,and Chydorus sphaericus declined dramatically.
|
Michigan
|
24430
|
|
4665
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Anecdotal
|
Field
|
Bythotrephes may control the abundance of Cercopagis pengoi though competition and predation.
|
Michigan
|
33105
|
|
4666
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Anecdotal
|
Field
|
Bythotrephes likely compete with small fish for zooplankton prey.
|
Michigan
|
33105
|
|
4668
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Anecdotal
|
Field
|
There is concern that Bythotrephes could increase bioaccumulation of contaminants by lengthening the food chain.
|
Michigan
|
33105
|
|
4669
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
After the establishment of Bythotrephes longimanus in Lake Michigan, populations of Daphnia pulicaria, Daphnia galeata mendotae, and Daphnia retrocurva collapsed. However, it is unlikely that the collapse of the aforementioned Daphnids can be solely attributed to Bythotrephes introduction.
|
|
37019
|
|
4670
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
After the establishment of Bythotrephes longimanus in Lake Michigan, populations of Daphnia pulicaria, Daphnia galeata mendotae, and Daphnia retrocurva collapsed. However, it is unlikely that the collapse of the aforementioned Daphnids can be solely attributed to Bythotrephes introduction.
|
|
37019
|
|
4671
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
Bythotrephes longimanus may have an impact on the cyclopoid population by the consumption of nauplii.
|
|
37019
|
|
4672
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
N/A
|
Predation impacts of Bythotrephes longimanus cascade down the food chain from their immediate crustacean prey to rotifers, who apparently benefit from competitive release, and down to phytoplankton.
|
North America
|
37064
|
|
4673
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Experimental
|
N/A
|
Predation impacts of Bythotrephes longimanus cascade up the food chain by outcompeting other macroorganisms for prey and by changing the behavior and diet of some fish species.
|
North America
|
37064
|
|
7446
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
Bythotrephes longimanus are a large, predatory cladoceran, and are known to consume zooplankton at higher rates than they are produced, causing rapid decreases in zooplankton diversity and biomass following establishment.
|
|
42359
|
|
7447
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
In some lakes invaded by Bythotrephes longimanus, microcrustacean biomass was reduced by 40–90%, resulting in decreased prey availability for other zooplanktivores.
|
|
42359
|
|
7449
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
In Minnesota lakes, young-of-year Sander vitreus size was reported as smaller in Bythotrephes longimanus-invaded lakes compared to non-invaded populations once sizes were corrected for temperature variation that may influence growth.
|
Minnesota, United States
|
42359
|
|
7606
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
In lakes invaded by Bythotrephes longimanus, declines in length of age-0 Sander vitreus were observed by the end of their first summer compared to age-0 Sander vitreus in non-invaded lakes.
|
|
42359
|
|
8349
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
A decline in native cladocerans following the introduction of Bythotrephes longimanus (spiny waterflea) has been observed in Lake Huron and Lake Michigan. In Lake Erie, the detection of B. longimanus in 1985 was also accompanied by a decline in multiple species of cladocerans (e.g., Eubosmina coregoni, Daphnia mendotae, Daphnia retrocurva), including an almost complete absence of Diaphanosoma spp. wherever B. longimanus was present in 1986.
|
Great Lakes, USA
|
16817
|
|
8350
|
Bythotrephes longimanus
|
Predation/Herbivory
|
Observational
|
Field
|
In Lake Michigan, the decline of Daphnia retrocurva and Daphnia pulicaria populations, in contrast to relatively stable populations of Daphnia mendotae, has been attributed to the latter's markedly faster escape responses to Bythotrephes longimanus (spiny waterflea).
|
Lake Michigan, USA
|
24425
|
|