2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/20/2019 | 11:30 AM - 11:45 AM | TRANSLATING MULTIMETRIC INDEX SCORES INTO TAXA-SPECIFIC BIODIVERSITY LOSSES | 250 CF
TRANSLATING MULTIMETRIC INDEX SCORES INTO TAXA-SPECIFIC BIODIVERSITY LOSSES
Multimetric indices (MMIs) are fundamentally derived from taxa-specific abundances. MMIs are often 3-4 levels of aggregation removed from the raw, taxonomic data used to calculate the index. We use data from streams of Appalachian Mountains, USA, to evaluate (1) to what degree an MMI translates into taxa-specific biodiversity loss, and (2) whether sharp declines of individual taxa corresponded well with an MMI impairment threshold. We used Threshold Indicator Taxa Analysis (TITAN) to estimate where individual taxa showed greatest increases or declines along the MMI score continuum. We found that numerous individual taxa decreased sharply when MMI scores fell below ~75-90 (scale: 0-100), which illustrated that the MMI was effectively representing individual taxa responses, but also revealed that the vast majority of taxa were essentially lost from streams prior to even reaching the impairment threshold for the region (MMI=68). We discuss the potential value of using this reciprocal approach for translating MMIs into taxa-specific responses as well as refining impairment thresholds.
- Biodiversity
- Bioassessment
- Environmental Regulation
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Presenters/Authors
Ryan S. King
(), Baylor University, Ryan_S_King@baylor.edu;
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Emily Bernhardt
(), Duke University, emily.bernhardt@duke.edu;
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Matthew Baker
(), University of Maryland Baltimore County, mbaker@umbc.edu;
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