Copper inhibition of phytoplankton in Saginaw Bay, Lake Huron

Lehman, John T.; Bazzi, Ali; Nosher, Todd; Nriagu, Jerome O.

doi:10.1139/f04-129

Cited by 8 publications

(9 citation statements)

References 23 publications

(30 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Whereas copper is an essential micronutrient, at higher concentrations it is toxic to phytoplankton, hence the use of copper sulphate as an algicide in lakes and reservoirs. In a Lake Huron bioassay experiment, phytoplankton growth was inhibited by addition of as little as 1 mg/L copper, despite complexation of most of the added copper with organic ligands in the lake water (Lehman et al, 2004).…”

Section: Micronutrient Limitation In Lake Waiholamentioning

confidence: 99%

Responses of lake phytoplankton to micronutrient enrichment: a study in two New Zealand lakes and an analysis of published data

2008

View full text Add to dashboard Cite

Natural and anthropogenic changes in nutrient concentrations can affect phytoplankton in marine and freshwater environments. However, potential micronutrient limitation of phytoplankton productivity in fresh waters is often overlooked. To investigate the responses of lake phytoplankton to micronutrient enrichment, we conducted a study in two contrasting New Zealand lakes, and analysed data from the published international literature. We undertook nutrient enrichment bioassays of phytoplankton communities sampled from a mesotrophic reservoir and an eutrophic coastal lake to determine the relative occurrence of micronutrient (iron, boron, cobalt, copper, molybdenum) and macronutrient (nitrogen, phosphorus) limitation. In the mesotrophic reservoir, phytoplankton productivity was phosphorus limited. No evidence of micronutrient limitation was found in six bioassays in summer. In the eutrophic lake, tenfold enrichment of ambient micronutrient concentrations increased the primary productivity in four of 11 bioassays. During a cyanobacterial bloom in the eutrophic lake, experimental enrichment with boron, cobalt, copper or molybdenum increased primary productivity by 40 %. These four micronutrients are commonly applied as agricultural fertiliser in the lakes catchment. Nitrogen or phosphorus enrichment had no effect on phytoplankton productivity at this time. Micronutrient limitation has been reported in more than 40 lakes internationally, and our analysis of published data suggests that the prevalence of micronutrient limitation is unrelated to lake size or trophic state. As micronutrient enrichment can significantly increase phytoplankton productivity in a range of lakes types, the potential contribution of micronutrient enrichment to eutrophication should not be overlooked.

show abstract

Section: Micronutrient Limitation In Lake Waiholamentioning

confidence: 99%

Responses of lake phytoplankton to micronutrient enrichment: a study in two New Zealand lakes and an analysis of published data

2008

View full text Add to dashboard Cite

show abstract

“…Copper additions have been shown to reduce chl a levels in natural freshwater phytoplankton communities, other laboratory bioassays with C. reinhardtii, and higher plants [17,18,30]. One likely mechanism to explain the decrease in chlorophyll may be Cu substitution for Mg during chlorophyll formation [2].…”

Section: Bioassay Of Cell Response To Cu Exposurementioning

confidence: 99%

“…Importantly, the tools applied in this work are likely those that prove useful in advancing our understanding of cellular metal toxicity. In addition, Cu has been shown to inhibit phytoplankton growth and chlorophyll a (chl a) production in algal communities in surface waters [18]. We chose Chlamydomonas reinhardtii as our freshwater test organism because of its extensive use in laboratory experiments, documented sensitivity to Cu [15][16][17], and wellestablished genetic and molecular characteristics.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of glutathione endpoints for measuring copper stress in Chlamydomonas reinhardth

Stoiber

Shafer

Perkins³

et al. 2007

Enviro Toxic and Chemistry

View full text Add to dashboard Cite

Glutathione (GSH) is the most abundant nonprotein thiol in eukaryotic cells and it protects cells by functioning as an antioxidant and a metal-binding ligand. Because glutathione readily undergoes oxidation-reduction reactions to combat oxidative stress, intracellular ratios of the reduced (GSH) to the oxidized (GSSG) forms of glutathione may serve as an important biomarker of exposure and effect of trace metals in eukaryotic cells. We compared sensitivity of glutathione ratios in the freshwater alga Chlamydomonas reinhardtii to the traditional endpoints of cell growth rates and chlorophyll a following exposure to Cu for periods of 6 and 24 h. A response of the GSH:GSSG ratio to Cu concentration was observed at Cu levels of 40 and 80 nM after exposure for both 6 and 24 h. The concentration of total GSH at 24 h was roughly half the value at 6 h after exposure to either 40 or 80 nM Cu. A response for cell growth rate was observed only at 24 h, whereby the average specific growth rate decreased from about 1.1 to 0.4 d(-1). The total Cu concentrations eliciting a cell response of 50%, effect concentrations (EC50s), after 24 h of exposure were similar (49.2, 49.8, and 38.2 nM Cu) and not significantly different for GSH:GSSG ratio, GSH levels, and specific growth, respectively. Total cell-associated Cu concentrations after exposure for 24 h were calculated from the EC50 endpoints and ranged from 13.3 to 17.0 fg/cell. Overall, thiol ratios were indicative of toxicity resulting from exposure to Cu, but precision may be greater for the cell growth rate endpoints.

show abstract

“…Field surveys and bioassays demonstrated trace metal effects on the phytoplankton of inner and outer regions of Saginaw Bay, Lake Huron (USA) (Lehman et al, 2004). A suggested that Hg increased with size and age of fish and showed a negative relationship with growth rate (Stafford et al, 2004).…”

Section: Heavy Metalsmentioning

confidence: 99%

Lake and Reservoir Management

Bhatti¹

2005

Water Environment Research

View full text Add to dashboard Cite

A number of scientific journals published findings of numerous research studies and investigations in the year 2004 on the subject of lake and reservoir management. Two journals were exclusively attributed to lake and reservoir management, namely, Lake and Reservoir Management published by the North American Lake Management Society (NALMS) and Lakes and Reservoirs; Research and Management, an official journal of the International Lake Environment Committee (ILEC). In this review, an attempt was made to cover, as much as possible, all topics directly related to the management of lakes and reservoirs. In addition, efforts were made to cover a diversity of studies on the lake and reservoir ecology, as related to nutrients, limnology, eutrophication, etc., however, papers of pure scientific nature on microbial isolation, enumeration, characterization, and population dynamics were not included. MANAGEMENT AND PLANNING ISSUESThrough a state-wide survey, Gabriel and Lancaster (2004) compared the characteristics of lake associations and lake districts in terms of their management objectives, issues, activities, and use of funds and also examined the relationship between management activities and their effectiveness. In a case study of Winnebago System (Wisconsin USA), results of public survey indicated that there was need for a public education program that focused on publicizing the 2384 technical limitations of lake level regulation to reduce hazard losses (Gabriel, 2004). Another case study in reallocation of a multipurpose federal reservoir revealed substantial discrepancies between benefits and costs evaluated in accordance with the full set of federal planning principles and abbreviated procedures historically used when the scope and scale of reallocation became large (McMahon and Farmer, 2004).In a conservation and improvement study of the environment in dam reservoirs, latest developments following dam construction and the concrete measures taken by dam constructors to follow the regulations concerned in Japan were described (Harada and Yasuda, 2004). Examination of land use controls in the Lake Biwa watershed from the perspective of environmental conservation and management demonstrated that the continued existence of farmland and forests, in conjunction with urban sprawl, in the urbanization promotion areas and the use districts, resulted in serious land use problems which were seriously aggravated in the south-eastern and north-eastern parts of the watershed (Yamamoto and Nakamura, 2004).A study used data from the Urmia region in Iran to develop a rule for evaporation correction during reservoir planning and presented a methodology to use the rule (Montaseri and Adeloye, 2004). A conceptual model, the nearshore shunt, to describe a fundamental redirection of nutrient and energy flow consequent to dreissenid establishment suggested that the nearshore shunt would require even more stringent phosphorus (P) management for lakes strongly impacted by dreissenids to maintain nearshore water quality (Hecky et al., 200...

show abstract

Copper inhibition of phytoplankton in Saginaw Bay, Lake Huron

Cited by 8 publications

References 23 publications

Responses of lake phytoplankton to micronutrient enrichment: a study in two New Zealand lakes and an analysis of published data

Responses of lake phytoplankton to micronutrient enrichment: a study in two New Zealand lakes and an analysis of published data

Analysis of glutathione endpoints for measuring copper stress in Chlamydomonas reinhardth

Lake and Reservoir Management

Contact Info

Product

Resources

About