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Exotic plant colonization and occupancy within riparian areas of the Interior Columbia River and Upper Missouri River basins, USA

Wetlands

By:
, , , and
https://doi.org/10.1007/s13157-013-0399-8

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Abstract

Exotic plant invasions into riparia often result in shifts in vegetative composition, altered stream function, and cascading effects to biota at multiple scales. Characterizing the distribution patterns of exotic plants is an important step in directing targeted research to identify mechanisms of invasion and potential management strategies. In this study, we employed occupancy models to examine the associations of landscape, climate, and disturbance attributes with the colonization and occupancy patterns for spotted knapweed (Centaurea stoebe L.), Canada thistle (Cirsium arvense L., Scop.), and cheatgrass (Bromus tectorum L.) in the riparia of headwater streams (n = 1,091) in the Interior Columbia River and Upper Missouri River Basins. We found relatively low occupancy rates for cheatgrass (0.06, SE = 0.02) and spotted knapweed (0.04, SE = 0.01), but moderate occupancy of Canada thistle (0.28, SE = 0.05); colonization rates were low across all species (<0.01). We found the distributions of spotted knapweed, Canada thistle, and cheatgrass to exhibit significant associations with both ambient climate conditions and anthropogenic and natural disturbances. We attribute the low to moderate occupancy and colonization rates to the relatively remote locations of our sample sites within headwater streams and urge consideration of means to prevent further invasions.

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Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Exotic plant colonization and occupancy within riparian areas of the Interior Columbia River and Upper Missouri River basins, USA
Series title:
Wetlands
DOI:
10.1007/s13157-013-0399-8
Volume:
33
Issue:
3
Year Published:
2013
Language:
English
Publisher:
Springer
Contributing office(s):
Northern Rocky Mountain Science Center
Description:
12 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Wetlands
First page:
409
Last page:
420
Country:
United States
Other Geospatial:
Interior Columbia River and Upper Missouri River basins
Online Only (Y/N):
N
Additional Online Files (Y/N):
N