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Hyland, Jeffrey L.; Snoots, Timothy R.; Balthis, W. Leonard

doi:10.1023/a:1005959907969

Cited by 17 publications

(2 citation statements)

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“…Three chemicals-copper, pyrene, and 4,4 -dichlorodiphenyltrichloroethane (DDT)-were selected to form the contaminant mixture based on their known toxicity, representation of three broad contaminant classes (metals, PAHs, and pesticides), and their prevalence in southeastern estuaries (Hyland et al 1998(Hyland et al , 2000. DDT is one of the best-known and most studied chlorinated hydrocarbon contaminants and has been shown to be toxic to aquatic invertebrates (USEPA 1980;Lotufo et al 2000).…”

Section: Preparation Of Spiked Sedimentsmentioning

confidence: 99%

“…We compare observed effect and no-effect concentrations in controlled mesocosm exposures to previously published benthic-based sediment quality targets derived from correlative field observations of benthic-contaminant relationships (Hyland et al , 2003 and to other related sediment quality targets based on sediment toxicity from shortterm (10-day) laboratory assays with single species (amphipods; Long et al 1998a). A mixture of chemical contaminants from three different chemical classes (metals, PAHs, pesticides), chosen for their known toxicity and observed prevalence in southeastern estuaries (Hyland et al 1998(Hyland et al , 2000, was used in a controlled mesocosm study using spiked sediments to test the hypothesis that an increase in chemical contamination will correspond to a decrease in the quality of benthic communities and that the observed effects will occur at mERMQs that are markedly lower than those observed in short-term amphipod toxicity tests from prior published studies. Sediment bioassays were not included in the present study.…”

Section: Introductionmentioning

confidence: 99%

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Effects of chemically spiked sediments on estuarine benthic communities: a controlled mesocosm study

Balthis

Hyland

Fulton

et al. 2009

Environ Monit Assess

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Ambient sediments were collected from a reference site in the North Edisto River, SC and transferred to a laboratory facility to investigate effects of chemical contaminants on estuarine infaunal communities under controlled mesocosm conditions. Sediment contaminant slurries were prepared using dried sediments collected from the reference site and spiked with a metal (copper), a polycyclic aromatic hydrocarbon (pyrene), and a pesticide (4,4(')-dichlorodiphenyltrichloroethane) to yield nominal mean effects range-median (ERM) quotients of <0.01 (no addition), 0.1, and 1.0 and applied to control, low dose (TRT A), and high dose (TRT B) treatment groups, respectively. Sediment samples for contaminant and benthic analyses were collected at the start of the experiment, 1 month after dosing, and 3 months after dosing. Near-nominal mean ERM quotients of 0.001, 0.075, and 0.818 were measured initially after dosing and remained fairly constant throughout the experiment. Measures of benthic condition, diversity, and richness were significantly reduced in both treatment groups relative to the control 1 month after dosing and persisted in TRT B at 3 months. The results demonstrate that benthic community effects can be observed at mean ERM quotients that are about an order of magnitude lower than levels that have been shown to be associated with significant toxicity in acute laboratory bioassays with single species (e.g., amphipods) in other studies.

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Section: Preparation Of Spiked Sedimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of chemically spiked sediments on estuarine benthic communities: a controlled mesocosm study

Balthis

Hyland

Fulton

et al. 2009

Environ Monit Assess

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Biomarkers in Integrated Ecotoxicological Sediment Assessment

Hartl

2010

Sedimentology of Aqueous Systems

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Statistical verification of the Chesapeake Bay benthic index of biotic integrity

et al. 2002

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SUMMARYThe benthic index of biotic integrity (B-IBI) developed for the Chesapeake Bay was statistically verified using simulations and a suite of multivariate statistical techniques. The B-IBI uses a simple scoring system for benthic community metrics to assess benthic community health and to infer environmental quality of benthic habitats in the Bay. Overall, the B-IBI was verified as being sensitive, stable, robust and statistically sound. Classification effectiveness of the B-IBI increased with salinity, from marginal performance for tidal freshwater ecosystems to excellent results for polyhaline areas. The greater classification uncertainty in low salinity habitats may be due to difficulties in reliably identifying naturally unstressed areas or may be due to regional ecotones created by stress gradients. Pollution-indicative species abundance, pollution-sensitive species abundance, and diversity (Shannon's index) were the most important metrics in discriminating between degraded and non-degraded conditions in the majority of the habitats. Single metrics often performed as well as the multi-metric B-IBI in correctly classifying the relative quality of sites. However, the redundancy in the multi-metric B-IBI provided a stable 'weight of evidence' system which increased confidence in general conclusions. Confidence limits developed for the B-IBI scores were used to distinguish among habitats that were degraded, non-degraded, of intermediate quality, or of indeterminate condition.

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Cited by 17 publications

References 0 publications

Effects of chemically spiked sediments on estuarine benthic communities: a controlled mesocosm study

Effects of chemically spiked sediments on estuarine benthic communities: a controlled mesocosm study

Biomarkers in Integrated Ecotoxicological Sediment Assessment

Statistical verification of the Chesapeake Bay benthic index of biotic integrity

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