David B. Donald

TL;DR: In this paper, the accumulation of organochlorine compounds as a function of altitude has been investigated in the upper reaches of high mountains in western Canada, and the results demonstrate that temperate-zone mountain regions, which tend to receive high levels of precipitation while being close to pollutant sources, are particularly susceptible to the accumulating of semivolatile organochorine compounds.

TL;DR: In this paper, the authors demonstrate that certain fossil pigments in lake sediments can be used to document historical changes in the UV radiation environment of lakes and show sedimentary concentrations that are correlated to the depth of penetration of UV radiation within lakes.

TL;DR: It is shown that melting glaciers supply 50 to 97% of the organochlorine inputs to a subalpine lake in Alberta, Canada, while contributing 73% of input water, suggesting that climate warming may cause melting glaciers to become increasing sources of contaminants to freshwaters.

TL;DR: Investigation of the occurrence of 45 pesticides in drinking water from reservoirs in this area that received water primarily from snowmelt and rainfall runoff from agricultural crop lands suggested that atmospheric deposition was the principal pathway from fields to the reservoirs.

TL;DR: It is shown that a forest fire caused a 5-fold increase in whole-body Hg accumulation by rainbow trout and smaller Hg increases in muscle of several fish species in a mountain lake, and a large short-term release of total Hg (THg) and MeHg to streams and the lake.