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Documentation of Red Spruce Growth Decline

Goal(s)/Objective(s): A study to determine whether red spruce is declining in growth over much of its geographic range and if so, when the decline may have begun
Key Findings: The decline in growth of red spruce previously reported only for isolated locations is occurring throughout a sizable portion of the geographic region.
Views: 1137
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Effect of Pesticides on Cholinesterase from Aquatic Species: Crayfish, Trout and Fiddler Crab

Problem Addressed: Use of pesticides and the development of quantitative assays for low concentrations of these pesticides
Key Findings: Nineteen pesticides were tested for inhibition of cholinesterase activity derived from trout brain, crayfish nervous system and whole fiddler crabs. Inhibition by low concentrations of a few of these pesticides permitted a very sensitive and selective assay. Chlorinated pesticides as a class showed little inhibitory effect on trout and crab cholinesterase. Carbamates strongly inhibit all three enzymes.
Views: 983
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Environmental Impact Studies of Spruce Budworm (Choristoneura Fumiferana Clemens) Control Programs in New Brunswick in 1976

Problem Addressed: Untoward effects to non-target organisms of the forest ecosystem increases as new products, dosage rates and pesticide combinations are introduced into the spray regime.
Goal(s)/Objective(s): Presents the results of studies carried out in New Brunswick to determine immediate effects and short-term impact of a series of trials employing several chemical insecticides at varying dosage rates upon breeding bird and small mammal populations and benthic organisms in treated streams
Key Findings: Aminocarb employed as an adulticide had no significant effects on bird or aquatic insect populations
Views: 861
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Pesticides in Forest Waters-Symptom of a Growing Problem

Problem Addressed: Pesticides in waters
Key Findings: We must become aware of the growing possibility of widespread contamination of the forest environment by a broad array of chemicals
Views: 907
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Persistence of Dylox Residues in a Forest and Lake Environment

Goal(s)/Objective(s): Determine the initial concentration and the persistence of Dylox residues in the forest environment and in water
Key Findings: Detectable residues of Dylox persisted on leaves, twigs and in forest litter for at least 106 days after spraying, although the levels of residues decreased rapidly during the first week
Views: 797
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