![](http://www.alamy.com/thumbs/6/34743E3D-E9FA-4E63-BABC-8BF43FF5E9BA/RYF368.jpg)
Effects of zebra mussels on chlorophyll, nitrogen, phosphorus and silica in north shore waters of Lake Erie effectsofzebramu00ontauoft Year: 1997 1 2 3 4 5 6 7 8 9 10 11 12 Month 1 2 3 4 5 6 7 8 9 10 11 12 Month Figure. 8. Monthly means 4^ 1 St. Dev. of chlorophyll and nutrient concentrations during pre- (1984-87) and post (1990-94) zebra mussel time periods in samples from the Rosehill water intake. 10
Size: 1686px × 1186px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage