Abstract
Prairie fens are globally vulnerable wetlands that are considered a conservation priority due to threats to their high biodiversity and hydrological functions. Establishing a thorough and repeatable plant sampling protocol is critical to evaluating conservation and management initiatives. Our goal was to evaluate a sample methodology designed to assess prairie fen plant diversity and determine if it produced results (1) representative of site diversity, (2) comparable among fens, and (3) efficient to collect. Nineteen fens between 8.5 and 28.4 ha were surveyed twice within one growing season during 2012 and 2013 field seasons using an area-proportional, random design. The turnover in species between spring and summer sampling periods within a site ranged from 8 to 50 %. Sample coverage of total estimated plant species richness ranged from 84.8 to 95.0 % with a mean of 90.1 %. We compared results from our area-proportional, random design to simulated random samples of 10, 15, 20, 25, 30, 35 and 40 quadrats per site. No significant difference was found in sample coverage per fen when using sampling rates of 25, 30, or 35 quadrats per site versus the area-proportional design. Shannon’s diversity index and floristic quality index differed by sample period and number of quadrats sampled per fen. Our sample design produced acceptable levels of coverage and facilitated comparisons across fens. Our methodology could be applied to future research, restoration monitoring, and conservation planning efforts in Midwestern prairie fens.
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Acknowledgments
The authors thank C. May and K. Pangle for their advice and expertise throughout the project and critical reading of the manuscript, and A.A. Reznicek for assistance in plant identification. We also thank all the private property owners, Jackson County, Livingston Land Conservancy, The Nature Conservancy, North Oakland Headwaters Land Conservancy, Oak Point Country Club, Servants of the Word, State of Michigan, and Washtenaw County for granting permission for research on their land. The authors also thank the editors and anonymous reviewers for their constructive comments on this manuscript. This work was supported by Botanical Society of America, Central Michigan University, Hanes Trust Foundation, Michigan Garden Club, Inc., and The Nature Conservancy. This paper is Contribution Number 70 of the Central Michigan University Institute for Great Lakes Research.
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Hackett, R.A., Monfils, M.J. & Monfils, A.K. Evaluating a sampling protocol for assessing plant diversity in prairie fens. Wetlands Ecol Manage 24, 609–622 (2016). https://doi.org/10.1007/s11273-016-9491-1
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DOI: https://doi.org/10.1007/s11273-016-9491-1