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Canyonlands National Park
Nonnative Species
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NPS Photo by Neal Herbert |
Tamarisk (Tamarix chinensis) turns brilliant orange in the fall |
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Non-native species are a problem throughout the American west, and Canyonlands is no exception. Several animal and plant infestations have significantly altered the area's ecology, disrupting food chains and nutrient cycles by out-competing native organisms in their own habitat.
Non-native plants impacting Canyonlands include tamarisk (salt cedar), cheat grass, Russian knapweed and Russian olive. There are also 40 species of non-native fish living in the upper basin of the Colorado River, which includes Canyonlands. Two of these, carp and channel catfish, are the most commonly seen fish in the park. Non-native birds, such as starlings and English sparrows, typically inhabit urban areas and are not a problem in the park.
Many scientific studies have been conducted to understand the impact of these species and, in some cases, to eradicate them. Thus far, success has been limited, and the issue of non-native species is likely to receive continued attention in the coming years.
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| ![](https://webarchive.library.unt.edu/eot2008/20090509095147im_/http://www.nps.gov/commonspot/images/clear.gif) | ![](https://webarchive.library.unt.edu/eot2008/20090509095147im_/http://www.nps.gov/commonspot/images/clear.gif) |
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![An Unwelcome Guest An Unwelcome Guest](https://webarchive.library.unt.edu/eot2008/20090509095147im_/http://www.nps.gov/imr/customcf/apps/CMS_HandF/Pictures/CANY_unwelcomeguest.jpg) An Unwelcome Guest Non-native plants are one of the greatest threats facing Canyonlands and much of the American west. more... | | ![Cheatgrass Cheatgrass](https://webarchive.library.unt.edu/eot2008/20090509095147im_/http://www.nps.gov/imr/customcf/apps/CMS_HandF/Pictures/CANY_Cheetgrass.jpg) Cheatgrass This non-native has drastically altered landscapes in Canyonlands and throughout the American west. more... | |
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![Detail of the Great Gallery pictograph panel Detail of the Great Gallery pictograph panel](https://webarchive.library.unt.edu/eot2008/20090509095147im_/http://www.nps.gov/imr/customcf/apps/CMS_HandF/Pictures/CANY_HolyGhost.jpg) |
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Did You Know?
Some of the rock art in Horseshoe Canyon was painted over 3,000 years ago. Now known as "Barrier Canyon" style rock art, it was painted by nomadic groups of hunter-gatherers that roamed throughout the southwest.
more...
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Last Updated: July 25, 2006 at 00:23 EST |