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. 2015 May 6;13(5):2834–2856. doi: 10.3390/md13052834

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© 2015 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

The results of cluster analysis of microzooplankton species-specific response to PUA in Exp. 4 and 5 expressed as the ratio of microzooplankton T₂₄ abundance at each PUA concentration to that in control. Cluster I includes the species that responded negatively to PUA; Sub-cluster IA includes the species that increased in the low PUA treatment and declined in the medium and high treatments. Cluster II includes the species with a weak response, visible only at the high PUA concentration or no response at all. The numbers next to the species name refer to the experiment where these species occurred (see Table 2). Ward linkage and Pearson squared distance were used to build the cluster tree.