| Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
|
8998
|
Rhamnus frangula
|
Habitat Alteration
|
Anecdotal
|
N/A
|
Rhamnus frangula (glossy buckthorn) is threatening the current ground vegetation and preventing oak seedling growth in oak savannas, which is an endangered ecosystem in the Midwest.
|
|
703
|
|
8999
|
Rhamnus frangula
|
Habitat Alteration
|
Anecdotal
|
N/A
|
In Indiana, Rhamnus frangula (glossy buckthorn) has been recorded invading the understory and reducing the diversity of native plants crucial to native wildlife.
|
Indiana, USA
|
25457
|
|
9000
|
Rhamnus frangula
|
Habitat Alteration
|
Anecdotal
|
N/A
|
Rhamnus frangula (glossy buckthorn) is invading various wetland ecosystems in Wisconsin and is shading out native plants in the process.
|
Wisconsin, USA
|
25486
|
|
9001
|
Rhamnus frangula
|
Habitat Alteration
|
Anecdotal
|
N/A
|
Found that the presence of Rhamnus frangula (glossy buckthorn) in wetlands in Ontario reduced species richness and that when removed, the density of native plants increased.
|
Ontario, Canada
|
25484
|
|
9002
|
Rhamnus frangula
|
Habitat Alteration
|
Observational
|
Field
|
Found that in savanna ecosystems in Pennsylvania, the species richness was higher in areas where Rhamnus frangula (glossy buckthorn) was present.
|
Allegheny Plateau, Pennsylvania, USA
|
25460
|
|
9003
|
Rhamnus frangula
|
Habitat Alteration
|
Observational
|
Field
|
Found little change in the resident plant community after Rhamnus frangula (glossy buckthorn) was allowed to grow and expand freely into the study site.
|
Cedarburg Bog State Natural Area, Ozaukee County, Wisconsin, USA
|
25439
|
|
9004
|
Rhamnus frangula
|
Habitat Alteration
|
Anecdotal
|
N/A
|
Monocultures are formed from Rhamnus frangula (glossy buckthorn), which harms songbird habitat and shifts the plant ecosystem to those that are more shade tolerant.
|
|
25441
|
|
9005
|
Rhamnus frangula
|
Habitat Alteration
|
Observational
|
Field
|
Along with changing the amount of available light in an ecosystem, Rhamnus frangula (glossy buckthorn) also uses allelopathy to alter the plant community around it.
|
Salmon Creek, Forest County, Pennsylvania
|
42450
|
|
9006
|
Rhamnus frangula
|
Habitat Alteration
|
Anecdotal
|
N/A
|
Rhamnus frangula (glossy buckthorn) becomes a dominating species in an ecosystem. The ability of a forest to regenerate and continue through the steps of succession may become severely limited.
|
|
25446
|
|
9007
|
Rhamnus frangula
|
Habitat Alteration
|
Anecdotal
|
N/A
|
Dense patches of Rhamnus frangula (glossy buckthorn) may also contribute to erosion by shading out other plants that grow on the forest floor.
|
|
25440
|
|
9008
|
Rhamnus frangula
|
Habitat Alteration
|
Anecdotal
|
N/A
|
Rhamnus frangula (glossy buckthorn) is often found in soils with higher nitrogen content, although it is unknown if this is due to initial establishment conditions or if buckthorns alter the surrounding soil chemistry via their leaf litter. This also makes the surrounding soil environment more favorable for exotic earthworms. Exotic earthworms are known to alter soil characteristics by increasing carbon, nitrogen, pH, and moisture, as well as modifying the microbial community.
|
|
25444
|