| Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
|
4577
|
Bythotrephes longimanus
|
Competition
|
Observational
|
Field
|
Bythotrephes are suspected to contribute to the decrease in alewife Daphnia hyalina populations during the summer months in Lago Maggiore.
|
Lago Maggiore
|
33103
|
|
4599
|
Bythotrephes longimanus
|
Competition
|
Observational
|
Field
|
Bythotrephes could compete with Leptodora (native waterfleas) for daphnid prey.
|
Lake Michigan
|
33102
|
|
4600
|
Bythotrephes longimanus
|
Competition
|
Experimental
|
Laboratory
|
In a laboratory study, 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
|
|
4662
|
Bythotrephes longimanus
|
Competition
|
Experimental
|
Field
|
Bythotrephes longimanus likely compete with other vertebrate predators for zooplankton prey, such as lake herring Coregonus artedi
|
Michigan
|
20507
|
|
4664
|
Bythotrephes longimanus
|
Competition
|
Anecdotal
|
Field
|
Bythotrephes may control the abundance of Cercopagis pengoi though competition and predation.
|
Michigan
|
33105
|
|
7448
|
Bythotrephes longimanus
|
Competition
|
Observational
|
Field
|
Bythotrephes longimanus can consume more zooplankton than some native zooplanktivores, including larval stages of fishes of economically and culturally significance, such as Sander vitreus.
|
|
42359
|
|
8344
|
Bythotrephes longimanus
|
Competition
|
Observational
|
Field
|
Bythotrephes longimanus (spiny waterflea) consumes small zooplankton, such as small cladocerans, copepods, and rotifers, potentially competing directly with planktivorous larval fish for food.
|
|
14016
|
|
8345
|
Bythotrephes longimanus
|
Competition
|
Anecdotal
|
N/A
|
Bythotrephes longimanus (spiny waterflea) consumes zooplankton, so it likely competes with planktivorous larval fish.
|
|
33104
|
|
8346
|
Bythotrephes longimanus
|
Competition
|
Anecdotal
|
N/A
|
Many studies have documented a negative correlation between abundances of Bythotrephes longimanus (spiny waterflea) and Leptodora (a native waterflea), implying that competition and/or predation from spiny waterflea has played a significant role in observed declines of Leptodora kindti.
|
|
24418
|
|
8347
|
Bythotrephes longimanus
|
Competition
|
Observational
|
Field
|
Vertical migration has also been observed in Daphnia spp. and copepod (e.g., Diacyclops thomasi, Leptomdiaptomus ashlandi, Leptomdiaptomus minutus) populations following Bythotrephes longimanus (spiny waterflea) invasion, indicating that some species may alter their spatial distribution (migrate to deeper waters during the day) to avoid spiny water predation or competition.
|
|
24416
|
|
8348
|
Bythotrephes longimanus
|
Competition
|
Observational
|
Field
|
Vertical migration has also been observed in Daphnia spp. and copepod (e.g., Diacyclops thomasi, Leptomdiaptomus ashlandi, Leptomdiaptomus minutus) populations following Bythotrephes longimanus (spiny waterflea) invasion. Such migration can lead to an indirect negative effect on these native prey species, including reduced individual and population growth rates at lower temperatures.
|
|
24424
|