Downloaded by NEWCASTLE UNIV on July 2, 2016 | http://pubs.acs.org Publication Date (Web): September 22, 2014 | doi: 10.1021/bk-2014-1168.ch006
Chapter 6
A Summary of Case Studies Designed To Determine the Influence of Multiple Stressors on Benthic Communities in Urban California Streams Lenwood W. Hall, Jr.,*,1 Ronald D. Anderson,1 William D. Killen,1 and Raymond W. Alden, III2 1University
of Maryland, Wye Research and Education Center, P.O. Box 169, Queenstown, Maryland 21658, United States 2Northern Illinois University, Dekalb, Illinois 60115, United States *E-mail:
[email protected] Bioassessment multiple stressor case studies using benthic macroinvertebrates were conducted concurrently with measurements of habitat metrics, metals and pyrethroids in order to determine which stressors were most important in influencing the condition of benthic communities in four urban wadeable California streams. These bioassessment multiple stressor annual studies were conducted in the following urban California waterbodies: Pleasant Grove Creek from 2006 to 2008; Kirker Creek in 2006 and 2007; Arcade Creek from 2009-2011; and Salinas streams from 2009 to 2011. Summary results showed the following: (1) analysis of the 3 year data sets for Pleasant Grove Creek showed significant relationships (α < 0.01) with benthic metrics and both habitat metrics and metals but not pyrethroids; (2) analysis of the 2 year data sets for Kirker Creek showed that habitat and metals have stronger statistical relationships (α
