Weathering Characteristics of Petroleum Hydrocarbons Deposited in Fine Clay Marine Sediments, Searsport, Maine

1978 ◽  
Vol 35 (5) ◽  
pp. 552-562 ◽  
Author(s):  
D. W. Mayo ◽  
D. S. Page ◽  
J. Cooley ◽  
E. Sorenson ◽  
F. Bradley ◽  
...  
Keyword(s):  
Petroleum Hydrocarbons ◽  
Intertidal Zone ◽  
The West ◽  
Petroleum Residues ◽  
Pollution Problem ◽  
Compound Distribution ◽  
Fine Clay ◽  
Principal Factors ◽  
Spill Site ◽  
Trace Concentrations

Further examination of the 1971 spill site in Long Cove, Searsport, Maine, has been carried out during 1976, and has led to the following observations: 1. Petroleum residues isolated from this spill give the appearance of weathering particularly slowly in the cold anoxic sediments of Long Cove. 2. Leaching from contaminated terrestial sediments onto portions of the intertidal zone on the west shore of the Cove while continuing in trace concentrations does not appear to be making a major contribution to the maintenance of a nearly steady state pollution problem found in several areas of the Cove. 3. On the average, the spill area currently appears to contain roughly 20% less material than in 1971. At a number of sites, however, there appears to have been either little or no decline in gross hydrocarbon concentrations, and essentially no weathering of the aliphatic portions of the petroleum residues. 4. One of the principal factors to influence the character of petroleum residues isolated 5 yr postspill appears to have been the weathering of the hydrocarbons during transport to the site of sediment penetration from upland locations. Thus, the current compound distribution was determined early in the spill period. 5. Repopulation of the Cove by M. arenaria, which is proceeding very slowly, correlates directly with the gross concentration variations of petroleum hydrocarbons. Key words: petroleum, gas chromatography, weathering, clay sediments, Maine

scholarly journals The Ecology of the Tamar Estuary I. Introduction

1938 ◽  
Vol 22 (2) ◽  
pp. 501-508 ◽  
Author(s):  
P. H. T. Hartley ◽  
G. M. Spooner
Keyword(s):  
Intertidal Zone ◽  
Comparable Data ◽  
Light Penetration ◽  
The West ◽  
Tamar Estuary ◽  
Quantitative Estimates

During 1936 and 1937 extensive physical and faunistic studies of the Tamar Estuary were made by several workers at the Plymouth laboratory. These investigations, though conducted independently and with different immediate aims, proved to have considerable bearing on one another, and each worker benefited by occasions for co-operation. As the work proceeded it became clear that one of the most important aspects of each investigation was the bearing it had on the balance of life in the estuary as a whole. It was decided to publish the results of these studies in a series of papers in which each contributor should lay due emphasis on data having possible bearings on the problems studied by the others, so as to present as complete a picture as possible.Studies have been made of salinity, temperature, penetration of daylight, macro- and micro-fauna of the intertidal zone, the sessile flora and fauna of the buoys, the fishes and their food, and the birds which frequent the flats and channels. Other studies are contemplated. In the work on light penetration and on quantitative estimates of the fauna of the mud-flats, no comparable data have hitherto been procured in this country.The Tamar is the largest of the rivers which flow into the west end of Plymouth Sound. It is tidal for nearly 19 miles (30 km.) of its course. Rather over 3 miles (5.5 km.) from the sea it is joined by the River Lynher to form the Hamoaze, an estuary common to the two rivers.

The Effects of the Wood-boring Isopod Sphaeroma terebrans on the Mangrove Communities of Florida

1976 ◽  
Vol 3 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Andrew E. Rehm
Keyword(s):  
Intertidal Zone ◽  
Marine Fishes ◽  
The West ◽  
Important Species ◽  
Usual Manner ◽  
Commercially Important ◽  
Wood Boring ◽  
Mangrove Communities ◽  
Feeding Grounds ◽  
Sphaeroma Terebrans

Investigations conducted along the west coast of Florida from Tampa to Cape Sable have shown that mangroves are confined to the upper portion of the intertidal zone by the wood-boring isopod, Sphaeroma terebrans Bate. As a result of this activity, mangroves are unable to become established throughout the intertidal zone and to extend shorelines in their usual manner.The attack on mangroves is most severe from Marco to Cape Sable, and is probably the single most important factor responsible for the erosion that is currently occurring along this section of coastline. Throughout its length, tides, temperature, and salinity, appear to influence the severity of the attack on mangroves by S. terebrans.Mangrove-dominated estuaries from Tampa to Cape Sable serve as nursery areas and feeding grounds for several commercially important marine fishes and Crustacea. The continual loss of mangroves as a result of S. terebrans activity, erosion, and human interference, may well decrease the extent to which these vital estuaries can be used as nurseries by commercially important species.

scholarly journals Elemental Composition and Health Risk Assessment of Giant Mudskipper (Periophthalmodon schlosseri) From the Intertidal Zone of the West Coast of Peninsular Malaysia

2021 ◽  
Vol 7 ◽  
Author(s):  
Ley Juen Looi ◽  
Ahmad Zaharin Aris ◽  
Noorain Mohd Isa ◽  
Fatimah Md. Yusoff ◽  
Hazzeman Haris
Keyword(s):  
Risk Assessment ◽  
Health Risk ◽  
Health Risk Assessment ◽  
West Coast ◽  
Fish Consumption ◽  
Intertidal Zone ◽  
Fish Muscle ◽  
Peninsular Malaysia ◽  
The West ◽  
Periophthalmodon Schlosseri

The elemental pollution in the intertidal zone of the West Coast of Peninsular Malaysia is of concern because this place is an ultimate sink of anthropogenic contaminants. In this study, the elemental concentrations (Al, Fe, Ba, Co, Cu, Cr, Mn, Ni, Pb, Zn, As, and Cd) in various tissues (muscle, gill, liver, gastrointestinal tract, and scale) of the giant mudskippers (Periophthalmodon schlosseri) from the West Coast of Peninsular Malaysia were determined by the inductively coupled plasma-mass spectrometry. The potential health risks associated with fish muscle consumption were assessed using estimated weekly intake (EWI), target hazard quotient (THQ), and target cancer risk (TR). The results showed that relatively high concentrations of Fe (1,641.91 ± 96.77 mg/kg), Ba (7.07 ± 0.05 mg/kg), Co (0.32 ± 0.00 mg/kg), Mn (36.08 ± 0.04 mg/kg), and Ni (4.43 ± 0.06 mg/kg) were found in the fish scales, suggesting the uptake waterborne elements via dermal exposure. However, all studied elements in the fish muscle were below the national and international food permissible limits. Health risk assessment through the estimation of THQ suggested that long-term exposure of As through fish consumption would cause possible non-carcinogenic risk. Also, the estimation of TR indicated that consumers are susceptible to cancer risks because of Cr and As exposure via fish consumption. Thus, for a developing country like Malaysia, it is recommended to include continuous monitoring of intertidal zones, using potential bioindicators, to assess ecosystem health status and safeguard human health. Additionally, mitigation strategies to address estuaries contamination and efforts to conserve and sustain natural resources should be established.

Application of monitored natural attenuation to remediate a petroleum-hydrocarbon spill site

2006 ◽  
Vol 53 (2) ◽  
pp. 321-328 ◽  
Author(s):  
C.M. Kao ◽  
W.Y. Huang ◽  
L.J. Chang ◽  
T.Y. Chen ◽  
H.Y. Chien ◽  
...  
Keyword(s):  
Natural Attenuation ◽  
Petroleum Hydrocarbons ◽  
Iron Sulfide ◽  
Contaminant Removal ◽  
Passive Remediation ◽  
Monitored Natural Attenuation ◽  
Transport Path ◽  
Spill Site ◽  
Benzene Toluene

Contamination of groundwater by petroleum-hydrocarbons is a serious environmental problem. The Monitored Natural Attenuation (MNA) approach is a passive remediation to degrade and dissipate groundwater contaminants in situ. In this study, a full-scale natural bioremediation investigation was conducted at a gasoline spill site. Results show that concentrations of major contaminants (benzene, toluene, ethylbenzene, and xylenes) dropped to below detection limit before they reached the downgradient monitor well located 280 m from the spill location. The results also reveal that natural biodegradation was the major cause of the observed contaminant reduction. The calculated natural first-order attenuation rates for BTEX and 1,2,4-trimethylbenzene (1,2,4-TMB) ranged from 0.051 (benzene) to 0.189 1/day (1,2,4-TMB). Evidence for the occurrence of natural attenuation includes the following: (1) depletion of dissolved oxygen, nitrate, and sulfate; (2) production of dissolved ferrous iron, sulfide, and CO2; (3) decreased BTEX concentrations and BTEX as carbon to TOC ratio along the transport path; (4) increased alkalinity and microbial populations; (5) limited spreading of the BTEX plume; and (6) preferential removal of certain BTEX components along the transport path. Additionally, the biodegradation capacity (44.73 mg/L) for BTEX and 1,2,4-TMB was much higher than other detected contaminants within the plume. Hence, natural attenuation can effectively contain the plume, and biodegradation processes played an important role in contaminant removal.

Response to Comment on “The West Falmouth Oil Spill after Thirty Years:  The Persistence of Petroleum Hydrocarbons in Marsh Sediments”

2003 ◽  
Vol 37 (9) ◽  
pp. 2021-2021 ◽  
Author(s):  
Christopher M. Reddy ◽  
Timothy I. Eglinton ◽  
Aubrey Hounshell ◽  
Helen K. White ◽  
Li Xu ◽  
...  
Keyword(s):  
Oil Spill ◽  
Petroleum Hydrocarbons ◽  
The West ◽  
Marsh Sediments

Rockpool ichthyofauna of Amazon coastal zone: spatial and environmental effects on species distribution

2017 ◽  
Vol 68 (6) ◽  
pp. 1137 ◽  
Author(s):  
Tiago Octavio Begot ◽  
Bruno Eleres Soares ◽  
Leandro Juen ◽  
Luciano Fogaça de Assis Montag
Keyword(s):  
Community Structure ◽  
Coastal Zone ◽  
Intertidal Zone ◽  
Fish Assemblages ◽  
Sandy Beaches ◽  
Tidal Range ◽  
Spatial Variables ◽  
Β Diversity ◽  
Principal Factors

The present study analysed the effects of environmental and spatial variables on the structure of fish communities inhabiting rockpools in the Amazon coastal zone to test the hypothesis that environmental characteristics and spatial distribution are the principal factors responsible for community structure. In all, 80 pools were sampled, 40 in the rainy season and 40 in the dry season. The pools were located on five sandy beaches of the Amazon coast. In all, 1303 fish were collected, representing 20 taxa distributed in nine orders and 14 families. The abundance and occurrence of different taxa varied considerably, as did β diversity, ranging from identical to completely different communities. Differences were found in taxa abundance between seasons (rainy and dry) and beach locality. However, for species richness, only differences between seasons were found, showing the effects of spatial and environmental variation in the structure of fish assemblages. This corroborates both spatial and environmental hypotheses of community structure, and reinforces the role of the extreme dynamic conditions, such as tidal range and influence of the rivers that flow into this estuary, in the intertidal zone fish on the Amazon coast.

Spatial distribution and concentration assessment of total petroleum hydrocarbons in the intertidal zone surface sediment of Todos os Santos Bay, Brazil

2013 ◽  
Vol 186 (2) ◽  
pp. 1271-1280 ◽  
Author(s):  
Carine S. Silva ◽  
Icaro T. A. Moreira ◽  
Olivia M. C. de Oliveira ◽  
Antonio F. S. Queiroz ◽  
Karina S. Garcia ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Surface Sediment ◽  
Petroleum Hydrocarbons ◽  
Intertidal Zone ◽  
Total Petroleum Hydrocarbons ◽  
Concentration Assessment

The West Falmouth Oil Spill after Thirty Years:  The Persistence of Petroleum Hydrocarbons in Marsh Sediments

2002 ◽  
Vol 36 (22) ◽  
pp. 4754-4760 ◽  
Author(s):  
Christopher M. Reddy ◽  
Timothy I. Eglinton ◽  
Aubrey Hounshell ◽  
Helen K. White ◽  
Li Xu ◽  
...  
Keyword(s):  
Oil Spill ◽  
Petroleum Hydrocarbons ◽  
The West ◽  
Marsh Sediments

scholarly journals LA COMUNIDAD DE COPÉPODOS EN LAS ISLAS DE PROVIDENCIA Y SANTA CATALINA (CARIBE COLOMBIANO) DURANTE EL PERÍODO LLUVIOSO (OCTUBRE) 2005

2016 ◽  
Vol 38 (1) ◽  
Author(s):  
María Del Pilar Martínez Barragán ◽  
Andrés Franco Herrera ◽  
Jairo Medina Calderón ◽  
Adriana Santos Martínez
Keyword(s):  
New Records ◽  
Acartia Tonsa ◽  
The West ◽  
West Side ◽  
Factors Affecting ◽  
Continental Runoff ◽  
Principal Factors ◽  
Equatorial Current ◽  
The Caribbean ◽  
Current Circulation

In order to contribute to the zooplanktonic community knowledge, particularly the Copepoda subclass at Providence and Santa Catalina Islands (Colombian Caribbean), 47 zooplankton samples got in October 2005 (rainy season) were analyzed. 42 species from Calanoida, Poecilostomatoida, Cyclopoida, Harpacticoida and Siphonostomatoida orders were found. Clausocalanus arcuicornis, C. furcatus, Calocalanus pavo, C. contractus, Pontella securifer, Lucicutia !avicornis, Subeucalanus mucronatus, Rhincalanus cornutus, Paracalanus sewelli, Centropages bradyi, Acartia tonsa, Lubbockia squillimana, Saphirella tropica, Euterpina sp. and Caligus sp., were new records for the islands. The Caribbean Equatorial Current circulation, Wilma and Beta Hurricanes passing through the Colombian Caribbean and continental runoff on the west side of the island, were the principal factors affecting copepod abundances and spatial distribution.

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