A Sensory System at the Interface between Urban Stormwater Runoff and Salmon Survival
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- 作者：Jason F. Sandahl ; David H. Baldwin ; Jeffrey J. Jenkins ; Nathaniel L. Scholz
- 刊名：Environmental Science & Technology
- 出版年：2007
- 出版时间：April 15, 2007
- 年：2007
- 卷：41
- 期：8
- 页码：2998 - 3004
- 全文大小：144K
- 年卷期：v.41,no.8(April 15, 2007)
- ISSN：1520-5851
文摘
Motor vehicles are a major source of toxic contaminantssuch as copper, a metal that originates from vehicle exhaustand brake pad wear. Copper and other pollutants aredeposited on roads and other impervious surfaces andthen transported to aquatic habitats via stormwater runoff.In the western United States, exposure to non-pointsource pollutants such as copper is an emerging concernfor many populations of threatened and endangeredPacific salmon (Oncorhynchus spp.) that spawn and rearin coastal watersheds and estuaries. To address this concern,we used conventional neurophysiological recordings toinvestigate the impact of ecologically relevant copperexposures (0-20 
g/L for 3 h) on the olfactory system ofjuvenile coho salmon (O. kisutch). These recordings werecombined with computer-assisted video analyses ofbehavior to evaluate the sensitivity and responsiveness ofcopper-exposed coho to a chemical predation cue(conspecific alarm pheromone). The sensory physiologyand predator avoidance behaviors of juvenile coho wereboth significantly impaired by copper at concentrations aslow as 2 g/L. Therefore, copper-containing stormwaterrunoff from urban landscapes has the potential to causechemosensory deprivation and increased predation mortalityin exposed salmon.
g/L for 3 h) on the olfactory system ofjuvenile coho salmon (O. kisutch). These recordings werecombined with computer-assisted video analyses ofbehavior to evaluate the sensitivity and responsiveness ofcopper-exposed coho to a chemical predation cue(conspecific alarm pheromone). The sensory physiologyand predator avoidance behaviors of juvenile coho wereboth significantly impaired by copper at concentrations aslow as 2 g/L. Therefore, copper-containing stormwaterrunoff from urban landscapes has the potential to causechemosensory deprivation and increased predation mortalityin exposed salmon.