Food web structure and mercury trophodynamics in two contrasting embayments in northern Lake Victoria

Bioaccumulation and biomagnification of mercury in African lakes: The importance of trophic status

“…1). These sites (excluding Lake Albert) are described in detail by Poste et al (2013), and results of stable isotope and Hg analysis for Napoleon Gulf and Murchison Bay are reported in Poste et al (2012).…”

“…Sample processing, analytical methodology and quality assurance/ quality control procedures (including SRMs used) for stable isotope and THg analyses for water, plankton and fish are presented in detail in Poste et al (2012). Briefly, stable carbon (δ 13 C) and nitrogen (δ 15 N) isotopic ratios were determined for oven-dried (60°C for 24 h) and homogenized fish and plankton samples at the Environmental Isotope Laboratory at the University of Waterloo.…”

Mercury biomagnification and contemporary food web dynamics in lakes Superior and Huron

“…This study utilizes the stable carbon (δ 13 C) and nitrogen (δ 15 N) isotope ratios of food web components from both lakes to describe food web structures and to assess the rate of Hg biomagnification (e.g., Kidd et al, 2012;Lavoie et al, 2010;Poste et al, 2012;Rolfhus et al, 2011).…”

Do human activities affect phytoplankton biomass and composition in embayments on Lake Diefenbaker?

“…Paul et al (2012) also found a strong positive correlation between cyanobacteria and land used for livestock pasture and a strong positive correlation between chlorophytes and native forest and urban land use in 11 lakes in New Zealand. Paleolimnological analyses revealed that nuisance cyanobacterial species and diatom species, indicative of eutrophic conditions, were strongly related to cropland area, livestock and urbanization after European settlement in Pasqua Lake, in the Northern Interior Plains of Canada Several studies have reported greater nutrient concentrations in embayments compared to the main channel of lakes and reservoirs (Mitrovic et al 2001;Poste et al 2012;Mbonde et al 2015). This is partly because embayments are usually shallow and sheltered from the main channel of lakes or reservoirs.…”

“…Hence, embayments often experience low flushing or longer water residence time (Mitrovic et al 2001;Hall et al 2003;Izydorczyk et al 2008). Consequently, the combined effects of nutrients released from anthropogenic activities in embayments and their longer residence time may encourage rapid algal growth and nuisance algal blooms (Izydorczyk et al 2008;Poste et al 2012;Mbonde et al 2015). For instance, Hall et al (2003) found that higher total phosphorus (TP) concentrations were associated with greater chlorophyll a concentrations in three embayments (Sodus Bay, Sandy Pond and Chaumont Bay) compared to offshore locations in Lake Ontario, Canada.…”