| Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
|
2974
|
Daphnia lumholtzi
|
Competition
|
Observational
|
Field
|
Daphnia lumholtzi competes with native zooplankton for food resourced in Kansas reservoirs.
|
|
13845
|
|
2977
|
Daphnia lumholtzi
|
Competition
|
Anecdotal
|
N/A
|
Daphnia lumholtzi likely out-compete native zooplankton in times when juvenile fish are feeding, as this species' morphology prevents most fish predation.
|
|
9154
|
|
2980
|
Daphnia lumholtzi
|
Competition
|
Anecdotal
|
N/A
|
Daphnia lumholtzi could impact limnetic freshwater zooplankton communities in its introduced range in North America.
|
|
9387
|
|
2989
|
Daphnia lumholtzi
|
Competition
|
Experimental
|
Laboratory
|
Daphnia lumholtzi out-competes NOrth American native Daphnia pulex for resources.
|
|
14119
|
|
8388
|
Daphnia lumholtzi
|
Competition
|
Experimental
|
Laboratory
|
In competitive experiments between Daphnia lumholtzi and Great Lakes native D. pulex, tanks with mixed populations, D. lumholtzi productivity dropped to 55% of its control value, while D. pulex productivity dropped to just 17% of its control value. Combined productivity of the daphnids dropped by over 50%, indicating that D. lumholtzi could facilitate competitive exploitation and adversely impact the overall productivity of the zooplankton community.
|
|
14119
|
|
8389
|
Daphnia lumholtzi
|
Competition
|
Experimental
|
Laboratory
|
Some Daphnia species are more vulnerable to competition with Daphnia lumholtzi (e.g., D. parvula and Ceriodaphnia dubia were more affected than D. magna).
|
|
42486
|
|
8390
|
Daphnia lumholtzi
|
Competition
|
Anecdotal
|
N/A
|
By occupying a niche that was previously unexploited by Daphnia spp., Daphnia lumholtzi has been hypothesized to compete with non-daphnid zooplankton.
|
|
42486
|
|
8391
|
Daphnia lumholtzi
|
Competition
|
Anecdotal
|
N/A
|
Research comparing native Daphnia spp. to the exotic Daphnia lumholtzi has found that competition was lower than expected. Daphnia lumholtzi is a tropical species and is adapted to warmer temperatures than native North American Daphnia. Thus, D. lumholtzi population sizes increases in late summer when native Daphnia populations are lower. As a result, D. lumholtzi may be filling a vacant "temporal niche" in the warmer months.
|
|
13845
|