Showing papers in "Marine Environmental Research in 2007"

TL;DR: In August, DO concentrations covered an area estimated at greater than 12,000 km(2) (or 432 km(3) volume) and a sharp density gradient was observed under the mixed layer in August, restricting vertical re-aeration across this strong pycnocline.

TL;DR: The functional composition of nematodes was strongly linked to median particle diameter and silt content of the sediment and water depth, and the ratio of realised versus total number of possible trait combinations of < 1 suggested that some trait combinations were not represented by the nematode fauna from this region.

TL;DR: Results suggest that temperature-effects on uptake are largely due to changes in solution chemistry and physical kinetics, which favours higher uptake at high temperature, particularly for biologically essential metals like copper.

TL;DR: The increased condition of wild fish associated with farms could increase the spawning ability of coastal fish populations, if wild fish are protected from fishing while they are present at farms, ifWild Mediterranean horse mackerel populations aggregated around two Mediterranean fish farms and from two natural control populations were analyzed.

TL;DR: To further understand the long-term effectiveness of AC as an in situ treatment strategy for PCB-contaminated sediments under field conditions, a 3-year comprehensive study is currently underway at Hunters Point that will compare the effectiveness of two large-scale mixing devices and include both unmixed and mixed-only control plots.

TL;DR: Stable isotope ratio results, supported by field observations, showed that the diet in spring and summer of eastern Aleutian Island transient killer whales is apparently not composed exclusively of Steller sea lions, and showed a gradient in stable isotope profiles from west to east.

TL;DR: Effects were mainly correlated with the degree of openness in water bodies, and ammonium and the other nitrogen forms were the most highly informative descriptors of effects in the area surrounding farms, even though weakness in statistical approach was highlighted.

TL;DR: The weak relations between predatory fish density and predation rates on urchins reveal that factors other than top-down control can be important over large scale (with the caveat that the study was conducted in fished areas), and patterns of interaction among strongly interacting taxa could change on large spatial scales and the number of species involved.

TL;DR: There was some evidence to support the hypothesis that macrofaunal assemblages change in response to patch size and time, and it was predicted that responses could be different across sites because of their slightly different environmental conditions.

TL;DR: Chemical processes identified in this study, namely precipitation of heavy metals and consequent settling and rising fluxes of particles, will influence the toxicity, the fate and the transport of potential contaminants in the produced water.

TL;DR: The results suggested that the rapid replacement of native P. mariqueter with invasive S. alterniflora would significantly improve the magnitude of nutrient cycling and bioavailability of trace metals in the salt marsh and maybe transport more toxic metals into the water column and the detrital food web in the estuary.

TL;DR: The aim of this study was to examine the effect of brine discharge over soft bottom communities along the Alicante coast over a two year period and observed a substitution of a community characterized by the presence of Polychaeta, Crustacea and Mollusca for another dominated by nematodes in the stations closer to the discharge.

TL;DR: The presence of OA and PTX-2s were more frequently seen in the summer, while DA and GD were detected throughout the year and without any obvious seasonal patterns, indicating that toxin production by algae varies with time and the species present and that number of cells alone cannot be used for the presence of toxins.

TL;DR: Benthic foraminifera showed that short-term biochemical changes in the sediment are toxic and may be involved in the summer mortality of Pacific oysters.

TL;DR: Fiddler crabs collected from two locations in New Jersey, a highly contaminated site and a relatively clean environment, showed that molting can reduce overall body burdens significantly and is a feasible mechanism to depurate lead.

TL;DR: The measurements support previous results in concluding that mangrove forests efficiently retain P and N.

TL;DR: Screening for tributyltin (TBT)-resistant and -degrading bacteria is relevant for the selection of isolates with decontamination ability of polluted areas, and one isolate, Aeromonas veronii Av27, highly resistant to TBT (3mM), uses this compound as carbon source and degrades it to less toxic compounds.

TL;DR: Temperature, salinity, silicate and total phosphorus were the variables that best explained the phytoplankton spatial pattern in the estuary, and apparently, phy toplankon community is adapted to fluctuations in light intensity, as suspended particulate matter did not come out as a key factor in shaping phytopsized structure along Tagus estuary.

TL;DR: The data strongly suggest that the two compounds bioaccumulate in a similar manner and that there is no biomagnification in the transfer between phytoplankton and herbivorous copepods.

TL;DR: The data, showing that larger fish are more likely to have elevated VTG concentrations, suggests a gradual accumulation by marine fish, probably through feeding, of persistent (probably relatively weak) estrogenic compounds.

TL;DR: Marked chemical changes in the ecosystem were observed during the two-year study period, reinforcing the importance of these structures for sandy coastal areas rehabilitation through trophic chain pull-out.

TL;DR: The results have shown that a fish sentinel species should have the highest brain AChE level among the more sensitive ones, and suggest a possible evolutionary linkage for A cholinesterase sensitivity to methyl paraoxon.

TL;DR: In this paper, a laboratory method is described for determining the chronic toxicity of contaminants associated with whole sediments, which is conducted using neonates of the estuarine amphipod Corophium volutator at 15 °C, salinity 25 psu and a 12 h light:12 h dark photoperiod.

TL;DR: This work focuses on the analysis and identification of phenols in produced water, in particular long-chain para-substituted alkylphenols, which act as endocrine disruptors for marine biota.

TL;DR: Although losses of fringing saltmarsh around estuaries have the potential to significantly affect estuarine food webs, the significance of such losses will be site- and estuary-dependent.

TL;DR: Imposex intensities and organotin concentrations in tissues showed good correlation, indicating S. haemastoma as a reliable bioindicator of TBT and TPhT contamination in coastal waters.

TL;DR: Data highlighted the role that anchoring might have on the slow growing seagrass P. oceanica meadow and the number of leaves per shoot by the end of the study was similar among all treatment combinations, suggesting that this was the only phenological feature that recovered.

TL;DR: The Thau Lagoon, a French Mediterranean shallow lagoon, is a site where extensive shellfish farming occurs and the role of this activity on nutrient exchange at the sediment-water interface in relation to organic matter (OM) sedimentation and degradation is evaluated.

TL;DR: Based on the small number of fish species tested, the present study suggests that the higher the frequency of a pinger, the less likely it is to affect the behaviour of marine fish.

TL;DR: Seasonal variations and biomarker proxies indicated a spatial shift in OM sources, where terrestrial OM rapidly decreased while seagrass and microbial OM markedly increased along a northeastern to southwestern transect, suggesting that hydrological fluctuations and seasonal primary productivity are the drivers controlling the POM composition in Florida Bay.