A diatom quality index from a diatom-based total phosphorus inference model

Gerald V. Sgro; Euan D Reavie; John C. Kingston; Amy R. Kireta; Michael J. Ferguson; Nicholas P. Danz; Jeffrey R. Johansen

doi:10.1080/15555270701263234

A diatom quality index from a diatom-based total phosphorus inference model

Gerald V. Sgro, Euan D Reavie, John C. Kingston, Amy R. Kireta, Michael J. Ferguson, Nicholas P. Danz, Jeffrey R. Johansen

Natural Resources Research Institute

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

A diatom quality index to assess diatom community impairment in the nearshore wetlands of the Laurentian Great Lakes was developed from a diatom-based total phosphorus (TP) weighted average inference model. The index is calculated with a weighted average equation using species optima standardized to a 1-10 scale and species tolerance standardized to a 1-3 scale. Multiple regression analysis revealed a moderate fit (R² = 0.63) between site scores of the selected index and GIS derived watershed characteristics (agriculture, soils, and industrial facilities). These index scores more closely fit watershed characteristics than the diatom inferred TP (R² = 0.59). In a regression tree analysis, soil permeability separated higher index scores from lower scores identifying this variable as an important interaction factor in the analysis. The diatom quality index can be a powerful tool for analyzing habitat quality in the Great Lakes and can communicate the link between quantifiable diatom assemblage response with watershed-level disturbance.

Original language	English (US)
Pages (from-to)	15-34
Number of pages	20
Journal	Environmental Bioindicators
Volume	2
Issue number	1
DOIs	https://doi.org/10.1080/15555270701263234
State	Published - Jan 2007

Bibliographical note

Funding Information:
With this work we honor the memory of John Kingston. We also acknowledge the work of the many people involved with the Great Lakes Environmental Indicators project who contributed to this work including: G. Stoermer who provided taxonomic expertise; N. Andresen who assisted with diatom identification and enumeration; J. Hennick, J. Reed, and J. Ameel, who performed water chemistry analysis; as well as the students and summer help who aided in the data-collection effort. We also acknowledge the contributions of R. Kreis and J. Thompson who provided Environmental Protection Agency (EPA) oversight to the project. This research was funded by a U.S. EPA Science to Achieve Results (STAR) grant to the Great Lakes Environmental Indicators project, US EPA Agreement EPA/8286750. The document has not been subjected to the agency's peer and policy review and therefore does not necessarily reflect the view of the Agency, and no official endorsement should be inferred. This is contribution number 436 of the Center for Water and the Environment, Natural Resources Research Institute, University of Minnesota, Duluth.

Keywords

Diatoms
Great Lakes
Water quality index

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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A diatom quality index from a diatom-based total phosphorus inference model

Abstract

Bibliographical note

Keywords

UN SDGs

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