Effects of herbicide mixture on microbial communities in prairie wetland ecosystems: A whole wetland approach

Effects of a herbicide mixture on primary and bacterial productivity in four prairie wetlands with varying salinities: An enclosure approach

“…Although PP was stimulated in the freshwater wetland (P109) immediately following treatment (Days 1 and 2) no such stimulation in algal biomass was noted. Stimulation of PP was similar to observations made in a curtained wetland study after an ephemeral freshwater wetland was treated with the same herbicide mixture and at similar concentrations to those in the present study (Sura et al, 2012a). Such stimulation may be due to the mode of action of six of the eight herbicides in the mixture (2,4-D, MCPA, clopyralid, dicamba, mecoprop and dichlorprop) (Sura et al, 2012b).…”

“…Glyphosate herbicide formulations account for about one-fifth of the total area of crop land treated with herbicides in the Province of Manitoba, which is also within the PPR region (Shymko et al, 2008). Six of the eight herbicides most frequently detected in the drinking water reservoirs are auxin-type compounds and are known to have bi-phasic behavior, i.e., inhibitory effects at higher concentrations and stimulatory effects at lower concentrations (Sura et al, 2012a(Sura et al, , 2012b. However, whether these herbicides are present in wetlands singly or as mixtures, there is limited information regarding their toxic effects, especially on the microbial communities, and how they vary with wetland hydrology.…”

Pesticides in Ichkeul Lake–Bizerta Lagoon Watershed in Tunisia: use, occurrence, and effects on bacteria and free-living marine nematodes

“…The circles indicate the specific T-RFs for site 1 (blue), site 2 (yellow green), site 3 (green), and site 4 (red) determining, thus, the fate of OCPs in the environment. Previous studies showed that the presence of pesticides caused changes in bacterial community structure (Sura et al 2012), decreasing bacterial diversity and demonstrating pesticide removal capacities (Lopez et al 2005;Tien et al 2013). River biofilms have been particularly studied; they have been found to be able to metabolize the herbicides atrazine and diclofopmethyl (Lawrence et al 2001), the organophosphorous pesticide diazinon (Tien et al 2013), and the carbamate pesticides methomyl, carbaryl, and carbofuran (Tien et al 2013).…”

Water Pollution and Water Quality Control of Selected Chinese Reservoir Basins

“…In the terms of water quality, a water pollution study should be conducted and evaluated to establish the water pollution 132 G. Wen et al monitoring network to understand the water pollution situation and dynamics of various pollutants in time to prevent the contamination of source water. 5.…”