Spatial and temporal patterns of the infaunal community near a major ocean outfall in Southern California

Diener, Douglas R.; Fuller, S. Cynthia; Lissner, A.; Haydock, Charles; Maurer, Don; Robertson, George; Gerlinger, Thomas

doi:10.1016/0025-326x(95)00093-3

Cited by 30 publications

(12 citation statements)

References 26 publications

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“…Spatial gradients relative to the outfall were not apparent from the biomass and the Shannon-Wiener diversity index results for the infaunal benthic community. Number of species generally was greatest near the outfall at the 60-m depth contour and lowest at the deepest station (24); this pattern of decreasing number of species with increasing water depth has been observed in many studies of the Southern California Bight, including previous surveys at CSDOC [17,18].…”

Section: Infaunal Community Assessment At Csdocmentioning

confidence: 65%

Sediment Contaminants and Biological Effects in Southern California: Use of a Multivariate Statistical Approach to Assess Biological Impact

Maxon¹,

Barnett²,

Diener³

1997

Environ Toxicol Chem

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Abstract-This study attempts to predict biological toxicity and benthic community impact in sediments collected from two southern California sites. Contaminant concentrations and grain size were evaluated as predictors using a two-step multivariate approach. The first step used principal component analysis (PCA) to describe contamination type and magnitude present at each site. Four dominant PC vectors, explaining 88% of the total variance, each corresponded to a unique physical and/or chemical signature. The four PC vectors, in decreasing order of importance, were: (1) high molecular weight polynuclear aromatic hydrocarbons (PAH), most likely from combusted or weathered petroleum; (2) low molecular weight alkylated PAH, primarily from weathered fuel product; (3) low molecular weight nonalkylated PAH, indicating a fresh petroleum-related origin; and (4) fine-grained sediments and metals. The second step used stepwise regression analysis to predict individual biological effects (dependent) variables using the four PC vectors as independent variables. Results showed that sediment grain size alone was the best predictor of amphipod mortality. Contaminant vectors showed discrete depositional areas independent of grain size. Neither contaminant concentrations nor PCA vectors were good predictors of biological effects, most likely due to the low concentrations in sediments.

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Section: Infaunal Community Assessment At Csdocmentioning

confidence: 65%

Sediment Contaminants and Biological Effects in Southern California: Use of a Multivariate Statistical Approach to Assess Biological Impact

Maxon¹,

Barnett²,

Diener³

1997

Environ Toxicol Chem

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“…Most of the available studies on sewage effects on marine environments concern softbottom benthic assemblages (Pearson & Rosenberg 1978, Austen et al 1989, Diener et al 1995, Estacio et al 1997. However, in recent years increasing attention has been paid to sessile macrobenthos living on hard substrata (Smith 1996, Underwood & Chapman 1996, Roberts et al 1998, Archambault et al 2001, Soltan et al 2001.…”

Section: Introductionmentioning

confidence: 99%

Changes in Mediterranean rocky-reef fish assemblages exposed to sewage pollution

Guidetti

Terlizzi²,

Fraschetti³

et al. 2003

Mar. Ecol. Prog. Ser.

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The fish fauna associated with shallow subtidal rocky-reefs in southern Apulia (SE Italy, Mediterranean Sea) was investigated to assess whether fish assemblage structure, and temporal trends in species richness and abundance of fishes were affected by sewage pollution. Fish assemblages were evaluated by visual census at 3 locations (3 to 4 km apart), 1 putatively impacted by a sewage outfall (discharge rate from 200 to 600 m 3 h -1) and 2 controls; within each location, 3 sites (100 to 300 m apart) were surveyed 4 times over the study year. In general, dissimilarities in assemblage structures between the 2 controls were always lower than between each control and the outfall location. During winter, however, the dissimilarities between controls were very low and similar to those between each control and the outfall location, suggesting that in this period, fish assemblages from the outfall did not greatly differ from those in the controls. Planktivorous and detritivorous fishes were more abundant at the impacted location and contributed most to dissimilarities in assemblage structures between the outfall and controls. Furthermore, the outfall significantly affected total fish abundance (which was consistently about 5-fold greater at the outfall than at the controls), and temporal trends in the average density of sparids and small serranids at the scale of locations, while small benthic fishes were influenced at the scale of sites (within locations). Particulate feeders and planktivorous fishes showed different temporal trends in average densities between outfall and controls at both spatial scales examined. Species richness and density of herbivorous fishes did not show significant differences attributable to the outfall. The data thus show that nearshore sewage discharges have the potential to alter spatio-temporal patterns in littoral fish assemblages.

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“…Spatial gradients relative to the outfall were not apparent from the biomass and the Shannon‐Wiener diversity index results for the infaunal benthic community. Number of species generally was greatest near the outfall at the 60‐m depth contour and lowest at the deepest station (24); this pattern of decreasing number of species with increasing water depth has been observed in many studies of the Southern California Bight, including previous surveys at CSDOC [17,18].…”

Section: Resultsmentioning

confidence: 67%

“…Reduction in abundance of A. urtica appears to result from predation by fish that use the discharge structure as a habitat, and wastewater discharge (e.g., high suspended solids, turbulence) that likely are independent from sediment contaminant concentrations [17]. Diener et al [18] hypothesized that increased flux rates of wastewater particulates may reduce efficiency of suspension feeders such as A. urtica or mask olfactory clues important for feeding. The pattern of Microtox EC50 remains unexplained given the poor correlations with potential toxicants measured in this study.…”

Section: Discussionmentioning

confidence: 99%

Sediment contaminants and biological effects in southern California: Use of a multivariate statistical approach to assess biological impact

Maxon¹,

Barnett²,

Diener³

1997

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

This study attempts to predict biological toxicity and benthic community impact in sediments collected from two southern California sites. Contaminant concentrations and grain size were evaluated as predictors using a two‐step multivariate approach. The first step used principal component analysis (PCA) to describe contamination type and magnitude present at each site. Four dominant PC vectors, explaining 88% of the total variance, each corresponded to a unique physical and/or chemical signature. The four PC vectors, in decreasing order of importance, were: (1) high molecular weight polynuclear aromatic hydrocarbons (PAH), most likely from combusted or weathered petroleum; (2) low molecular weight alkylated PAH, primarily from weathered fuel product; (3) low molecular weight nonalkylated PAH, indicating a fresh petroleum‐related origin; and (4) fine‐grained sediments and metals. The second step used stepwise regression analysis to predict individual biological effects (dependent) variables using the four PC vectors as independent variables. Results showed that sediment grain size alone was the best predictor of amphipod mortality. Contaminant vectors showed discrete depositional areas independent of grain size. Neither contaminant concentrations nor PCA vectors were good predictors of biological effects, most likely due to the low concentrations in sediments.

show abstract

Spatial and temporal patterns of the infaunal community near a major ocean outfall in Southern California

Cited by 30 publications

References 26 publications

Sediment Contaminants and Biological Effects in Southern California: Use of a Multivariate Statistical Approach to Assess Biological Impact

Sediment Contaminants and Biological Effects in Southern California: Use of a Multivariate Statistical Approach to Assess Biological Impact

Changes in Mediterranean rocky-reef fish assemblages exposed to sewage pollution

Sediment contaminants and biological effects in southern California: Use of a multivariate statistical approach to assess biological impact

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