Interaction of pesticides with aquatic microorganisms and plankton

Ware, George W.; Roan, C. C.

doi:10.1007/978-1-4615-8467-4_2

Cited by 34 publications

(21 citation statements)

References 47 publications

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“…If the chemical stability of the compounds under our conditions is indicative of their stability in river water and seawater, then atmospheric transport might account not only for their movement into the open ocean as suggested in ref. 9, but also for global redistribution, unless gradual partitioning into living organisms (13) in the freshwater and marine environments retards this process.…”

Section: Resultsmentioning

confidence: 99%

Fate and behavior of five chlorinated hydrocarbons in three natural waters

Oloffs¹,

Albright²,

Szeto³

1972

Can. J. Microbiol.

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1972. Fate and behavior of five chlorinated hydrocarbons in three natural waters. Can. J. Microbiol. 18: 1393-1398. Water samples removed from two rivers and from the subtidal zone of Georgia Strait in British Columbia were treated with either 0.025 pprn of DDT, lindane, a-chlordane, or y-chlordane, or 0.1 pprn Aroclor 1260 (PCB). The samples were incubated in the laboratory for up to 12 weeks at the temperatures of these natural waters at the time of sampling. Lindane persisted in all water samples throughout the experiment, but large proportions of the other compounds were transported into the atmosphere during incubation except when the containers were sealed. N o metabolic breakdown could be demonstrated. As demonstrated with 14C-y-chlordane, uneven distribution of the pesticides occurred rapidly, but was prevented, or reversed, by addition of a surfactant to the water. Total bacterial counts were generally higher in treated than in untreated water samples. OLOFFS, P. C., L. J. ALBRIGHT et S. Y. SZETO. 1972. Fate and behavior of five chlorinated hydrocarbons in three natural waters. Can. J. Microbiol. 18: 1393-1398. Des echantillons d'eau prClevCs de deux rivikres et de la zone des basses marees dans le Georgia Strait, en Colombie Britannique, furent trait& avec soit 0.025 ppm de DDT, lindane, a-chlordane, y-chlordane, ou 0.1 pprn d'Arochlor 1260 (PCB). Les tchantillons furent incubes dans le laboratoire pour des pkriodes allant jusqu'a 12 semaines, et aux temperatures des eaux naturelles au temps de 1'6hantillonnage. Le lindane persista dans tous les echantillons tout au cours de l'expbience, tandis que de grandes proportions des autres composCs furent transportees dans l'atmosphkre durant l'incubation, excepte lorsque les boites furent fermCes hermktiquement. On n'a pu demontrer de bris mktabolique. Lorsque le 14C-ychlordane fut utilise, on a dCmontrC que les pesticides se distribuent inigalement et rapidement; ce phenomkne est prevenu ou renverse par l'addition d'un surfactant B l'eau. Les comptes bactkriens totales furent genballement plus eleves dans les Cchantillons traites que dans ceux non trait&.

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Section: Resultsmentioning

confidence: 99%

Fate and behavior of five chlorinated hydrocarbons in three natural waters

Oloffs¹,

Albright²,

Szeto³

1972

Can. J. Microbiol.

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“…However, it is not clear whether the production of phenolic structures such as 1‐naphthol by microalgae leads to the known oxidative coupling [46] of these metabolites under environmental conditions. An additional process that might significantly eliminate pollutants from the water phase is the uptake of these compounds by microalgae [47], which, if the compounds are to be retained in the cells, will decrease immediate toxic effects. As a matter of fact, we do need much more information on algal‐based processes before we will be able to reliably predict the short‐ and long‐term impact of pollutant stress on, for example, freshwater systems.…”

Section: Discussionmentioning

confidence: 99%

Biodegradation of aromatic compounds by microalgae

Semple

Cain

Schmidt

1999

FEMS Microbiology Letters

232

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The microbial degradation of aromatic pollutants has been well characterized over a period of more than 30 years. The microbes of most interest have been bacteria and fungi. Only relatively recently has the question of how algae figure in the catabolism of these compounds attracted a degree of interest. The aim of this review is to highlight the biodegradative capabilities of microalgae on aromatic compounds, ranging from simple monocyclic to more complex polycyclic pollutants. This paper will briefly encompass studies which have investigated the growth on and the oxidation of these compounds by algae, as well as a more detailed characterization of the catabolic sequences involved in the transformation of these compounds.

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“…Butler (1977) reported that 0.1 ppm of paraquat inhibited growth of Navicula osteraria, while 100 ppm was needed to stop the growth of Phaeodactylum tricornutum. Ware and Roan (1970) found a decrease of 53% in carbon fixation of estuarine phytoplankton after 4 hr of exposure to 1 mg of paraquat /L. It is very important to expand the knowledge about harmful effects of toxic substances on population growth of planktonic algae, since they are an important component of aquatic systems.…”

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confidence: 99%