Sediment quality of the Lower St. Johns River, Florida: An integrative assessment of benthic fauna, sediment-associated stressors, and general habitat characteristics

Cooksey, Cynthia; Hyland, Jeffrey L.

doi:10.1016/j.marpolbul.2006.09.007

Cited by 16 publications

(6 citation statements)

References 37 publications

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“…Thus, ecological coefficients are used to provide an estimate of how the benthic community is structured. The species richness measures the number of species encountered in a given sample; the abundance of species is also expressed as the number of individuals (mean values from three replicates), whereas, the density of individual species is expressed as the total number of individuals per square metre, gathered in a given station (Zenetos & Palathanassiou, 1989; Tagliapietra et al , 1998; Lercari et al , 2002; Cooksey & Hyland, 2007; Young-Seuk et al , 2007). The analysis of diversity index carried out on a seasonal basis also helps clarify species richness.…”

Section: Methodsmentioning

confidence: 99%

“…Benthic organisms that characterize the ecological quality of their habitats (Pearson & Rosenberg, 1978;Cruz-Motta & Collins, 2004) were used to assess the human impact on the lagoon ecosystem. As mentioned by previous workers, most of macrobenthic fauna is sessile or has limited mobility and thus, the community structure directly depends mainly on environmental conditions (Olsgard & Gray, 1995;Rosenberg, 2001;Shin et al, 2004;Cooksey & Hyland, 2007). Responses to environmental disturbance of certain species are thought to depend on specific sensitivity and tolerance levels (Lancellotti & Stotz, 2004).…”

Section: Introductionmentioning

confidence: 97%

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Structure of benthic macroinvertebrates and dynamics in the northern lagoon of Tunis

2009

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The diet of blue runner Caranx crysos (Carangidae) in the Gulf of Gabès (Tunisia, Mediterranean) is described from analysis of stomach contents (N ¼ 1668 fish). The majority of samples were obtained from commercial purse seine and gill-net catches. The index of vacuity (%VI) was relatively high (58.7%) and differed significantly across months. Blue runner is an opportunistic predator that consumes mostly pelagic organisms, with benthic prey representing only a small proportion of the diet. The diet was quantified using the frequency of occurrence (%F), numerical abundance (%N), weight (%W) and the index of relative importance (IRI and %IRI) for each prey taxa.The most important prey categories were teleosts (%IRI ¼ 83.4) and crustaceans (%IRI ¼ 16.6), with molluscs only observed occasionally (%IRI , 0.1). Fish were also the dominant food items in both terms of weight (89.60%) and frequency of occurrence (82.44%). In terms of numerical abundance, crustaceans were the most abundant prey (78.07%). Ontogenetic and seasonal differences in the diet were observed, although there was no difference between the diets of males and females.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Structure of benthic macroinvertebrates and dynamics in the northern lagoon of Tunis

2009

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“…The water quality is influenced by land use, which is primarily urban and silviculture, and engineered structures intended to divert and re-direct surface water within the estuary. This estuary has been subjected to storm water and agricultural runoff and industrial wastewater discharge providing increased nutrient stress of phosphorus (Cooksey and Hyland 2007), leading to FDACS designating areas within this estuary as 'conditionally restricted' for shellfish harvesting.…”

Section: Florida Shellfish Estuaries-characteristicsmentioning

confidence: 99%

Regional Acidification Trends in Florida Shellfish Estuaries: a 20+ Year Look at pH, Oxygen, Temperature, and Salinity

Robbins

Lisle

2017

Estuaries and Coasts

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Increasing global CO 2 and local land use changes coupled with increased nutrient pollution are threatening estuaries worldwide. Local changes of estuarine chemistry have been documented, but regional associations and trends comparing multiple estuaries latitudinally have not been evaluated. Rapid climate change has impacted the annual and decadal chemical trends in estuaries, with local ecosystem processes enhancing or mitigating the responses. Here, we compare pH, dissolved oxygen, temperature, and salinity data from 10 Florida shellfish estuaries and hundreds of shellfish bed stations. Over 80,000 measurements, spanning from 1980 to 2008, taken on Atlantic Ocean and West Florida coast showed significant regional trends of consistent pH decreases in 8 out of the 10 estuaries, with an average rate of decrease on the Gulf of Mexico side estuaries of Florida of 7.3 × 10 −4 pH units year −1 , and average decrease on the Atlantic Coast estuaries of 5.0 × 10 −4 pH units year −1. The rates are approximately 2-3.4 times slower than observed in pH decreases associated with ocean acidification in the Atlantic and Pacific. Other significant trends observed include decreasing dissolved oxygen in 9 out of the 10 estuaries, increasing salinity in 6 out of the 10, and temperature increases in 3 out of the 10 estuaries. The data provide a synoptic regional view of Florida estuary trends which reflect the complexity of changing climate and coastal ocean acidification superimposed on local conditions. These data provide context for understanding, and interpreting the past and predicting future of regional water quality health of shellfish and other organisms of commercial and ecological significance along Florida's coasts.

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“…It is estimated that, in salt marshes, half the CO 2 is the result of OM degradation via sulphate reduction and fermentation (Valiela, 1995). The end products of anaerobic metabolism include many toxic catabolites, such as ammonia, hydrogen sulphide and methane, in addition to the products of fermentation, such as lactic acid, alcohols, and lowmolecular-weight fatty acids (Goldhaber & Kaplan, 1974;US EPA, 1986, 1989Nixon et al, 1995;Eddy, 2005;Cooksey & Hyland, 2007). Depending on their chemistry and concentration, these products spread through the water column, with toxic effects on aquatic organisms (Järvekülg, 1976;Wilson et al, 1986;Dayv et al, 1989;Sanz-Lázaro & Marín, 2011).…”

Section: The Concept Of Saprobitymentioning

confidence: 99%

Saprobity: a unified view of benthic succession models for coastal lagoons

2012

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We briefly review and expand upon classic conceptual models describing the succession of benthic communities along a gradient of organic matter (OM) enrichment developed for freshwater (the Saprobity System), coastal marine (the Pearson-Rosenberg [P-R] model) and lagoon (the Guélorget-Perthuisot [G-P] model) ecosystems. Differences and similarities between various approaches and models are highlighted and the P-R and G-P models are unified under a single conceptual framework of habitat saprobity in coastal lagoons. We refer to saprobity as the state of an aquatic ecosystem resulting from the input and decomposition of OM and the removal of its catabolites. In addition to other factors, such as salinity, saprobity is viewed as a selection factor for species diversity. The higher the saprobity is, the more impaired the system is, with progressively poorer benthic communities characterized by species that are increasingly tolerant of reducing conditions and toxicity. In coastal lagoons, these processes are strongly driven by hydrodynamics, which govern the land-sea gradient. Based on our review and analysis, we find that saprobity can be a useful descriptor of ecosystem state as determined by OM metabolism, suitable for characterizing the natural conditions of coastal lagoons and assessing their quality.

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Sediment quality of the Lower St. Johns River, Florida: An integrative assessment of benthic fauna, sediment-associated stressors, and general habitat characteristics

Cited by 16 publications

References 37 publications

Structure of benthic macroinvertebrates and dynamics in the northern lagoon of Tunis

Structure of benthic macroinvertebrates and dynamics in the northern lagoon of Tunis

Regional Acidification Trends in Florida Shellfish Estuaries: a 20+ Year Look at pH, Oxygen, Temperature, and Salinity

Saprobity: a unified view of benthic succession models for coastal lagoons

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