Influences of coastal stressors on phytoplankton in the Great Lakes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We aimed to determine the scale of stressor impacts on phytoplankton in the Laurentian Great Lakes. Algal abundance of 72 pelagic locations was summarized for the seven main phytoplankton classes. The nearest shorepoint to each pelagic location was used to generate reaches of various lengths. Watersheds intersecting each reach were quantified for the six stressors: agriculture, urban area, population, point sources, roads, and a composite stressor. Phytoplankton data were modeled with the stressors using regressions at the various shoreline reach sizes. Model fits were compared among phytoplankton classes, indicators, stressors, shoreline sizes, and seasons. Cryptophytes and diatoms had the strongest relationships to stress; cell density had a stronger model fit than biovolume; agriculture and population were the most important determinants of phytoplankton abundance; phytoplankton were better related to stress quantified from larger reaches; and spring assemblages were more strongly associated with stress than summer assemblages.

Original languageEnglish (US)
Title of host publicationWorld Environmental and Water Resources Congress 2013
Subtitle of host publicationShowcasing the Future - Proceedings of the 2013 Congress
Pages1541-1551
Number of pages11
StatePublished - Nov 18 2013
EventWorld Environmental and Water Resources Congress 2013: Showcasing the Future - Cincinnati, OH, United States
Duration: May 19 2013May 23 2013

Other

OtherWorld Environmental and Water Resources Congress 2013: Showcasing the Future
CountryUnited States
CityCincinnati, OH
Period5/19/135/23/13

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