Abstract
We determined the best predictors of an index of amphibian biotic integrity calculated from 54 shrub and forested wetlands in Ohio, USA using a two-step sequential holdout validation procedure. We considered 13 variables as predictors: four metrics of wetland condition from the Ohio Rapid Assessment Method (ORAM), a wetland vegetation index of biotic integrity, and eight metrics from a landscape disturbance index. For all iterations, the best model included the single ORAM metric that assesses habitat alteration, substrate disturbance, and habitat development within a wetland. Our results align with results of similar studies that have associated high scores for wetland vegetation indices of biotic integrity with low habitat alteration and substrate disturbance within wetlands. Thus, implementing similar management practices (e.g., not removing downed woody debris, retaining natural morphological features, decreasing nutrient input from surrounding agricultural lands) could concurrently increase ecological integrity of both plant and amphibian communities in a wetland. Further, our results have the unexpected effect of making progress toward a more unifying theory of ecological indices.
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Acknowledgments
We thank P. Kocovsky, P. Seelbach, the Associate Editor, and two anonymous reviewers for comments on earlier versions. Use of trade, product, or firm name does not imply endorsement by the U.S. Government. This article is Contribution Number 1913 of the Great Lakes Science Center.
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Micacchion, M., Stapanian, M.A. & Adams, J.V. Site-Scale Disturbance and Habitat Development Best Predict an Index of Amphibian Biotic Integrity in Ohio Shrub and Forested Wetlands. Wetlands 35, 509–519 (2015). https://doi.org/10.1007/s13157-015-0638-2
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DOI: https://doi.org/10.1007/s13157-015-0638-2