Classification efficiency of the B-IBI comparing water body size classes in Chesapeake Bay

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Title: Classification efficiency of the B-IBI comparing water body size classes in Chesapeake Bay
Authors: de-la-Ossa-Carretero, Jose Antonio | Lane, Michael F. | Llansó, Roberto J. | Dauer, Daniel M.
Research Group/s: Biología Marina
Center, Department or Service: Universidad de Alicante. Departamento de Ciencias del Mar y Biología Aplicada
Keywords: B-IBI | Benthos | Biotic index | Estuary | Water body | Chesapeake
Knowledge Area: Zoología
Issue Date: Apr-2016
Publisher: Elsevier
Citation: Ecological Indicators. 2016, 63: 144-153. doi:10.1016/j.ecolind.2015.12.010
Abstract: The Benthic Index of Biotic Integrity (B-IBI) was developed and is currently employed for environmental assessment in Chesapeake Bay. The index consists of a variety of benthic community metrics (e.g. abundance, biomass, diversity, stress tolerance groups, etc.) scored by thresholds applied to seven benthic community habitats (tidal freshwater, oligohaline, low mesohaline, high mesohaline mud, high mesohaline sand, polyhaline mud, and polyhaline sand) This index was verified as being a sensitive and robust tool for summarizing the status of benthic communities. In our study we tested the classification efficiency of the index using new benthic data by characterizing each sample a priori as degraded or undegraded using criteria of sediment contaminant levels, bioassays and bottom dissolved oxygen levels. A primary objective of our study was to test the classification efficiency of the B-IBI in small water bodies connected to larger water bodies of the mainstems of the large rivers of Chesapeake Bay, as well as the efficiency of the index over time (1990 through 2009). The B-IBI was affected by the size of the water body, e.g., index accuracy was higher for water bodies in small watersheds in lower salinity habitats, whereas large water bodies of the mainstem of rivers were better classified by the B-IBI in habitats with higher salinities. Across the seven benthic habitat types overall correct classification was moderate to low and lower for correctly classifying undegraded sites. In general the index metrics showed some deficiencies that suggest improvements could be made by recalibrating existing metric thresholds or selecting new suitable metrics.
Sponsor: This work is part of Chesapeake Bay Program at Old Dominion University. The senior author is grateful for the predoctoral grant awarded by the University of Alicante that financed this internship at Old Dominion University and for the intern's acceptance by this host institution.
ISSN: 1470-160X (Print) | 1872-7034 (Online)
DOI: 10.1016/j.ecolind.2015.12.010
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2015 Elsevier Ltd.
Peer Review: si
Publisher version:
Appears in Collections:INV - BM - Artículos Científicos / Scientific Papers

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