By Sebastian A. Gerlach
When, in 1966, the Gennan learn Society directed the eye of oceanographers within the Federal Republic of Ger many to difficulties of marine toxins, i used to be now not enthusiastic. Emphasis in this challenge zone intended that different vital study plans needed to be postponed. however the lectures on the 3rd foreign Oceanographic Congress, September 1970, in Tokyo, and on the FAO convention on Marine pollutants and its results on dwelling assets and Fishing, December 1970, in Rome, confident me that learn on difficulties of marine toxins is a social legal responsibility, and that the oceanographer has to take a stand. I issued public warnings in regards to the carrying on with use of insecticides and needed to guard myself opposed to protests via the fishing and lots of colleagues who have been, in Novem ber 1970, ignorant of the level of the risk. therefore, i used to be required by way of my career to obtain an outline of the prob lems of ocean toxins. In 1971 I purely had to familiarize myself with a few 100 bibliographical goods. in the intervening time, the flood of knowledge has risen dramatically, and within the 12 months 1975, no fewer than 868 guides below the heading of "Marine toxins" have been pronounced (Table 1). it really is, consequently, an increasing number of diffi cult to differentiate new result of medical study from the numerous repetitions and diversifications, and that i worry that from yr to yr my efforts to demonstrate the particular prestige of the matter at a given second could be topic to extra gaps.
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Additional resources for Marine Pollution: Diagnosis and Therapy
In 1974, egg shells were still 16% thinner than in eggs collected before 1943, and egg shells broke more frequently than normal. 88 young birds per nest on Anacapa Island, 113 mg/kg DDT in the fat of eggs, plus 120 mg/kg PCB (Anderson and Jurek 1977). It will be of great interest to follow up the next years, because figures will help to answer the question whether there is a further decrease of concentrations, or whether the 1974-1975 figures represent the pollution load typical for Pacific coastal regions (Anderson et a!.
However, up to now, the plant population along open coastal areas of England have not changed. This even applies to the 48-km-long North Sea coast of Durham where the Tyne, Wear, and Tees Rivers, which are heavily polluted by effluents, discharge into the sea. The first collecting of algae goes back to the years 1793 and 1864, before industrialization reached its high point. At that time, 48 species of algae were labeled as common; today, out of 128 species known in all, 53 are so labeled. Furce/- laria fastigiata, Lomentaria clavellosa, Plocamium coccineum, Polysiphonia elongata, Desmarestia aculeata, and Pelvetia canaliculata were previously common; today they are absent; Asperococcus fistulosus and Spongomorpha aeruginosa are rare today.
For the Baltic, the answer depends on the evaluation scientists will provide regarding natural versus man-made causes of oxygen depletion in the deep water (see Chap. 4). For coastal areas of other seas, like the North Sea and Kattegat, there are, at present, not many arguments in favor of a chemical elimination of nutrients from sewage. One can, by the way, go one step further and question whether waste water treatment is at all necessary in coastal situations. A biological sewage treatment plant reduces the nutrient load in the effluent by about one third and the amount of biodegradable organic substances, expressed as BOD, by about 90%.