Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 395197
Title Consequences of stressor-induced changes in species assemblage for biodiversity indicators
Author(s) Vries, P. de; Smit, M.G.D.; Dalfsen, J.A. van; Laender, F. de; Karman, C.C.
Source Environmental Toxicology and Chemistry 29 (2010)8. - ISSN 0730-7268 - p. 1868 - 1876.
DOI https://doi.org/10.1002/etc.223
Department(s) IMARES Milieu
Wageningen Marine Research
Publication type Refereed Article in a scientific journal
Publication year 2010
Keyword(s) marine-biotic-index - taxonomic distinctness - drilling discharges - management tool - food webs - ecosystems - risk - quality - applicability - distributions
Abstract Protection of biodiversity is a major objective in environmental management. However, standard protocols for ecological risk assessments use endpoints that are not directly related to biodiversity. In the present study, the changes in five biodiversity indicators, namely, the Hill, Shannon-Wiener, Simpson's diversity index, AZTI's Marine Benthic Index (AMBI), and Benthic Quality Index (BQI), are calculated in case species experience direct chemical effects. This is done for an uncontaminated situation as well as for situations in which the effect concentration of a certain fraction of species (x%) is exceeded, that is, at the hazardous concentration (HCx) of the species sensitivity distribution (SSD) of the considered community. Results indicate that the response of the biodiversity indicators to concentrations spanning the complete concentration range of the SSD is variable. This response depends mainly on the type of indicator, the species assemblage, and the ratio of the slope of the concentration effect curves of the species and the slope of the SSD. At the HC5, a commonly used threshold in environmental risk assessment, biodiversity indicators, are affected at a marginal level (change is less than 5% in 99.6% of the simulated cases). Based on the results, the HC5 level is likely to be a protective threshold for changes in biodiversity in terms of richness and heterogeneity in the vast majority of the simulated cases (99.6%) for chemicals for which direct effects are dominant.
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