Concentration, distribution, and bioavailability of mercury and methylmercury in sediments of Baltimore Harbor and Chesapeake Bay, Maryland, USA

1999 ◽  
Vol 18 (11) ◽  
pp. 2438-2447 ◽  
Author(s):  
Robert P. Mason ◽  
Angie L. Lawrence
Keyword(s):  
Chesapeake Bay ◽  
Concentration Distribution ◽  
Baltimore Harbor

scholarly journals Modeling water exchange between Baltimore Harbor and Chesapeake Bay using artificial tracers: Seasonal variations

2010 ◽  
Vol 70 (1) ◽  
pp. 102-119 ◽  
Author(s):  
Bo Hong ◽  
Nauth Panday ◽  
Jian Shen ◽  
Harry V. Wang ◽  
Wenping Gong ◽  
...  
Keyword(s):  
Chesapeake Bay ◽  
Seasonal Variations ◽  
Water Exchange ◽  
Baltimore Harbor ◽  
Artificial Tracers

scholarly journals SELECTION OF DISPOSAL AREAS FOR SPOIL FROM BALTIMORE HARBOR

1970 ◽  
Vol 1 (12) ◽  
pp. 137
Author(s):  
John F. Hoffman
Keyword(s):  
Decision Making ◽  
Chesapeake Bay ◽  
Econometric Model ◽  
Decision Making Process ◽  
Baltimore Harbor ◽  
Industrial Parks ◽  
Filter Feeders ◽  
Maintenance Dredging ◽  
Toxic Concentrations ◽  
Selection Of

Selection of sites for the diked disposal of 100 million cubic yards of spoil dredged from Baltimore Harbor presented a formidable problem Fifty percent of this spoil will be derived from harbor improvement m the next ten years The remainder will result from maintenance dredging and some private dredging over a 20 to 25 year period The number of sites available for diked disposal areas, the various methods used for dredging and the fact that the dike material required transportation to site gave rise to a number of variables The decision making process was facilitated by an econometric model Concentrations of metals such as chromium, cadium, zinc, lead, and copper have been found in the sediments of Chesapeake Bay An investigation as to the mode of their occurrence m the material to be dredged was made to appraise any possibility of toxic concentrations occurring m filter feeders such as oysters for shellfish constitute a sizeable industry in the Chesapeake Bay Stabilization of the deposited dredged spoil was investigated m order to determine whether the unstable loosely-deposited fine gram material extending over a three to five square mile area could be economically converted to a firm foundation material suitable for industrial parks, harbor terminals or water-oriented parks.

Microbial Ecology of Petroleum Utilization in Chesapeake Bay

1973 ◽  
Vol 1973 (1) ◽  
pp. 685-690 ◽  
Author(s):  
John D. Walker ◽  
Rita R. Colwell
Keyword(s):  
Chesapeake Bay ◽  
Natural Environment ◽  
Growth Conditions ◽  
Laboratory Simulation ◽  
Seasonal Incidence ◽  
Sediment Samples ◽  
Replica Plating ◽  
Baltimore Harbor ◽  
Water And Sediment ◽  
Water And Sediment Samples

ABSTRACT Analysis of water and sediments collected at two stations in Chesapeake Bay demonstrated four to five times the concentration of petroleum in an oil polluted site in Baltimore Harbor compared with the station in Eastern Bay which served as a control. The numbers of petroleum-degrading microorganisms, measured by direct and replica plating, in the water and sediment samples were related to the concentration of oil in each sample. Total yields of petroleum-degrading microorganisms grown on an oil substrate were greater for those organisms exposed to oil in the natural environment. Microorganisms isolated from an oil-contaminated environment produced cell yields under “natural” conditions, i.e., laboratory simulation of growth conditions in the natural environment, which equaled the yields of microorganisms which had not been previously exposed to oil and were grown under optimum conditions. Microorganisms isolated from water and sediment samples collected in Baltimore Harbor grew on substrates representative of the aliphatic, aromatic and refractory hydrocarbons. The hydrocarbon-utilizing fungus, Cladosporium resinae and actinomycetes were predominant among the hydrocarbon-utilizing isolates. Microbial degradation of petroleum in Chesapeake Bay appears to be mediated by the autochthonous microbial flora, the seasonal incidence of which is presently under study.

Between ‘Savage Man’ and ‘Most Faithful Englishman’ Manteo and the Early Anglo-Indian Exchange, 1584–1590

Itinerario ◽  
2000 ◽  
Vol 24 (2) ◽  
pp. 146-169 ◽  
Author(s):  
Michael Leroy Oberg
Keyword(s):  
North Carolina ◽  
Chesapeake Bay ◽  
One Year ◽  
Anglo Indian

In August of 1587 Manteo, an Indian from Croatoan Island, joined a group of English settlers in an attack on the native village of Dasemunkepeuc, located on the coast of present-day North Carolina. These colonists, amongst whom Manteo lived, had landed on Roanoke Island less than a month before, dumped there by a pilot more interested in hunting Spanish prize ships than in carrying colonists to their intended place of settlement along the Chesapeake Bay. The colonists had hoped to re-establish peaceful relations with area natives, and for that reason they relied upon Manteo to act as an interpreter, broker, and intercultural diplomat. The legacy of Anglo-Indian bitterness remaining from Ralph Lane's military settlement, however, which had hastily abandoned the island one year before, was too great for Manteo to overcome. The settlers found themselves that summer in the midst of hostile Indians.

Developing TMDLs for Local Impairments Consistent with the Regional Chesapeake Bay TMDL

2012 ◽  
Author(s):  
Gene Yagow ◽  
Brian Benham ◽  
Karen Kline ◽  
Becky Zeckoski ◽  
Carlington Wallace
Keyword(s):  
Chesapeake Bay

Spatial ecology and growth in early life stages of bay anchovy Anchoa mitchilli in Chesapeake Bay (USA)

2020 ◽  
Vol 651 ◽  
pp. 125-143
Author(s):  
TD Auth ◽  
T Arula ◽  
ED Houde ◽  
RJ Woodland
Keyword(s):  
Chesapeake Bay ◽  
Spatial Ecology ◽  
Environmental Variability ◽  
Larval Growth ◽  
Larval Abundance ◽  
Spatial And Temporal Variability ◽  
Estuarine Ecosystem ◽  
Anchoa Mitchilli ◽  
Larval Production ◽  
Bay Anchovy

The bay anchovy Anchoa mitchilli is the most abundant fish in Chesapeake Bay (USA) and is a vital link between plankton and piscivores within the trophic structure of this large estuarine ecosystem. Baywide distributions and abundances of bay anchovy eggs and larvae, and larval growth, were analyzed in a 5 yr program to evaluate temporal and spatial variability based on research surveys in the 1995-1999 spawning seasons. Effects of environmental variability and abundance of zooplankton that serve as prey for larval bay anchovy were analyzed. In the years of these surveys, 97.6% of eggs and 98.8% of larvae occurred in the polyhaline lower bay. Median egg and larval abundances differed more than 10-fold for surveys conducted in the 5 yr and were highest in the lower bay. Within years, median larval abundance (ind. m-2) in the lower bay was generally 1-2 orders of magnitude higher than upper-bay abundance. Salinity, temperature, and dissolved oxygen explained 12% of the spatial and temporal variability in egg abundances and accounted for 27% of the variability in larval abundances. The mean, baywide growth rate for larvae over the 5 yr period was 0.75 ± 0.01 mm d-1, and was best explained by zooplankton concentration and feeding incidence. Among years, mean growth rates ranged from 0.68 (in 1999) to 0.81 (in 1998) mm d-1 and were fastest in the upper bay. We identified environmental factors, especially salinity, that contributed to broadscale variability in egg and larval production.

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