Abstract
The increased use of herbicides has resulted in wide spread concern that they may be affecting nontarget areas. Because of degradation, dilution, and adsorption to soil particles, herbicides are rarely transported to such areas in toxic levels. However, this raises the question of whether herbicides transported to nontarget areas can accumulate to toxic levels with time and pose a potential long-range threat to the balance of organisms in the ecosystem in which they accumulate. In order to predict how a par ticular ecosystem would respond to introduction of a herbicide, it is necessary to determine the sensitivity of the system components to the compound and to determine the fate of the herbicide in that particular system. The salt marsh at Sapelo Island, Georgia, was selected as an area having the potential as a nontarget recipient of her bicides used in inland agricultural areas. A simulated salt marsh microecosystem has been constructed (Everest, 1978) using components from this salt marsh and is being used to study the fate of atrazine [I, 2-chloro-4-(ethyl amino)-6-(isopropylamino)-s-triazine]. Initially, the effects Cl
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