7) Table of mercury concentrations versus depth at four sta- 

 tions in the Northwest Atlantic Ocean. 



8) Table of mercury concentrations in coastal waters off the 

 northeastern United States (10 samples). 



9) Table of hydrocarbon concentrations in 14 samples col- 

 lected in the sea surface microlayer and subsurface (RV 

 Trident cruise 145). 



10) Table of hydrocarbon concentration in 36 water samples 

 collected during RV Trident cruise 152. 



1 1 ) Table of chlorinated hydrocarbons in 39 Bermuda air 

 samples (PCB, pp-DDT. cis-+trans-chlordane. dieldrin, toxa- 

 phene). 



12) Table of chlorinated hydrocarbons in 13 R\' Trident air 

 samples (PCB. pp-DDT, cis--|-trans-chlordane. dieldrin, toxa- 

 phene). 



13) Table of chlorinated hydrocarbons in six water samples 

 collected during RV Trident cruise 145 (PCB. pp-DDT). 



Organization: Woods Hole Oceanographic Institution 



Investigator: G. R. Harvey 



Project title: Input and Loss of Petroleum and Chlorinated 



Hydrocarbons to the Deep North Atlantic Ocean 

 Grant No.: IDO72-06435 



Contamination of the oceans by petroleum and chlori- 

 nated hydrocarbons provides the basis for geochemical tracer 

 experiments. Movements of these stable compounds (tracers) 

 through oceanic cycles in the Atlantic Ocean are being studied. 

 The investigator and coworkers, from previous work, have 

 gained a reasonable knowledge of quantities of these contami- 

 nants in the mixed layer of the Atlantic Ocean, especially the 

 North Atlantic. However, little is known about continental 

 inputs of hydrocarbons to the ocean, except by wind transport, 

 or about transport to or concentrations in the deep sea. These 

 processes are being studied, using both types of hydrocarbons, 

 through analyses of water, sediment, and benthos samples 

 from continental shelf, continental slope, and deep-sea areas of 



United States 



-40 = 



-30 



-20 



« 



All 85 



RV Atlantis II Cruise 78 /ai|.78 

 All 78 



/ 



-10^ 



Caribbean Sea 



South America 

 80 70- 



50 40 30 



Figure 2. — Woods Hole Oceanographic Institution cruise 

 Iracklincs — Input and Loss of Petroleum and Chlorinated 

 Hydrocarbons to the Deep North Atlantic Ocean study. 



N 



Cee • Paficia ^ 



Bay ^„^ 



S 



s 



Ns. 



i, Belingham 



W"' ^ 



Victoria 



V Vancouver 



Strait of 

 Georgia 



-^MVU' settle 



©4 



Figure 3. — Saanich Inlet site of CEPEX experimental enclosures. 



the North Atlantic. Objectives are to estimate rates at which 

 these organic contaminants are entering the sea from land and 

 air, their residence time in the water column, and their rates of 

 loss from seawater by burial in the sediments. Ultimate objec- 

 tives are to forecast oceanic environmental quality, using data 

 gathered by international monitoring programs. During the past 

 2 years, significant progress has been made in analyses of near- 

 shore, slope, and deep-sea sediment and water samples, and in 

 collection of abyssal plain benthos samples for analysis. Samples 

 used in this research were collected during three cruises by the 

 RV Atlantis and one cruise by the RV Knorr (fig. 2). 



Biological Effects Studies 



The purpose of these studies is to investigate the effects 

 of pollutants on marine organisms and ecological communities. 

 Both laboratory and field experiments are included. Laboratory 

 work is concerned mainly with effects of pollutants on single 

 classes of organisms. Field studies are integrated into the Con- 

 trolled Ecosystem Pollution Experiment (CEPEX). This co- 

 operative research project of international scope involves trap- 

 ping water and natural communities in large plastic enclosures 

 (10 m diameter by 30 m deep) and assessing the effects of 

 added pollutants on marine ecosystems — the long-term effects 

 influencing the stability of marine populations. The initial 

 CEPEX enclosures are located in Saanich Inlet, Vancouver 

 Island, British Columbia (fig. 3). Projects relating to biological 

 effects studies and CEPEX are listed in tables 4 and 5, respec- 

 tively. Project summaries follow. 



Organization: University of Georgia 



Skidaway Institute of Oceanography 

 Investigator: R. F. Lee 

 Project title: Fate of Petroleum Hydrocarbons in the Marine 



Food Web 

 Grant No.: GX-42482 



Various species of phytoplankton, zooplankton, fish, and 

 benthic invertebrates are subjected to suspensions and solu- 



