Non-native species are one of the major threats to native biodiversity around the world. There are numerous costs associated with introductions, both ecologically and economically. Aquatic systems are particularly vulnerable to non-native species introductions. The main source of non-native species introductions into aquatic ecosystems comes from legal and illegal fish stocking, but the pet trade and aquaculture and food industries also play a role. The threats associated with non-native species are expected to rise as confounding factors contribute to the continued introduction and spread of these species, and native species become increasingly vulnerable to environmental perturbations. The control of non-native species is most effective when a pro-active, preventative approach is taken. Eradication of a non-native species may be possible in some cases, but this approach can be costly and impractical in certain environments, especially when threatened native species are present or the threat of reinvasion is high. Cooperation among multiple agencies and jurisdictions is required to effectively manage non-native species introductions and their spread.
Wind, E.. 2005. Effects of Non-native Predators on Aquatic Ecosystems. Ministry of Water, Land and Air Protection. Wildlife Bulletin. B123
Topic: Alien (Invasive) Species
Keywords: bc, invasive species, amphibians, british columbia, ambystoma californiense, kokanee, opossum shrimp, mysis relicta, red-eared slider, turtle, lithobates catensbeiana
English Name: Brook Trout, Largemouth Bass, American Shad, Common Goldeneye, Tench, Yellow Perch, Black Bullhead, American White Pelican, Oregon Spotted Frog, Slider, Pumpkinseed, Fathead Minnow, Threespine Stickleback, Tiger Salamander, Goldfish, Nooksack Dace, Green Frog, Western Pond Turtle, Bullfrog, Brown Bullhead, Brown Trout, Sockeye Salmon, Red-legged Frog, Smallmouth Bass, Pacific Treefrog, Common Carp, Black Crappie, Cutthroat Trout, Barrow's Goldeneye, Salish Sucker
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