A comparative study of the use of inorganic carbon resources by Chara aspera and Potamogeton pectinatus

Berg, M.S. van den; Coops, H.; Simons, J.; Pilon, Jörn

doi:10.1016/s0304-3770(01)00202-9

Cited by 78 publications

(47 citation statements)

References 29 publications

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“…This difference might well explain the difference in iron sensitivity, where C. globularis was considerably more affected by iron additions than C. virgata. According to Van den Berg et al (2002), growth of charophytes is strongly correlated to the bicarbonate (HCO 3 -) concentrations in the water. The inability of C. globularis to maintain the buffer capacity in combination with light limitation could therefore have resulted in decreasing photosynthesis rates and a steady drop in pH in cylinders of the iron additions due to the quick addition of iron.…”

Section: Discussionmentioning

confidence: 99%

Iron addition as a shallow lake restoration measure: impacts on charophyte growth

et al. 2012

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Eutrophication has caused a decline of charophyte species in many shallow lakes in Europe. Even though external inputs of phosphorus are declining, internal loading of P from the sediment seems to delay the recovery of these systems. Iron is a useful chemical binding agent to combat internal phosphorus loading. However, the effects of iron addition on charophytes are not yet known. In this study we experimentally tested the potential toxicity of iron(III)chloride (FeCl 3 ) on two different charophytes, Chara virgata Kützing and Chara globularis Thuiller added at the concentration of 20 g Fe m -2 and 40 g Fe m -2 to the surface water. C. virgata growth was not significantly affected, whereas C. globularis growth significantly decreased with increasing iron concentrations. Nonetheless, biomass of both species increased in all treatments relative to starting conditions. The decrease of C. globularis biomass with high iron additions may have been caused by a drop in pH and alkalinity in combination with iron induced light limitation. Iron addition over a longer time scale, however, will not cause this rapid drop in pH. Therefore, we conclude that adding iron(III)chloride in these amounts to the surface water of a lake can potentially be a useful restoration method.

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Section: Discussionmentioning

confidence: 99%

Iron addition as a shallow lake restoration measure: impacts on charophyte growth

et al. 2012

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“…to be a better competitor for HCO 3 -(i.e. the main source of carbon; Van den Berg et al, 2002) than P. pectinatus might be a possible explanation. Inside a dense vegetation, the HCO 3 -concentration can be strongly reduced during the growth season and become a limiting factor.…”

Section: Macrophytes Nutrients and Turbiditymentioning

confidence: 99%

“…Chara spp. are more efficient at HCO 3 -uptake than P. pectinatus and will have the competitive advantage in such case (Van den Berg et al, 2002). However, if turbidity increases, as conditions become less suitable for Stoneworts, P. pectinatus will be the better competitor because of its canopy form that is more adapted to turbid waters than Stoneworts (Scheffer, 1998).…”

Section: Macrophytes Nutrients and Turbiditymentioning

confidence: 99%

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Influence of submerged vegetation and fish abundance on water clarity in peri-urban eutrophic ponds

2010

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Despite the presence of high nutrient concentrations, most ponds located around Brussels (Belgium) show a considerable variation in turbidity. The importance of submerged macrophytes in maintaining the clear-water state requires identification of the main factors determining macrophyte abundance and diversity in ponds and small lakes. In this study, the inter-relationships between submerged macrophyte cover, fish abundance and turbidity were investigated in 13 eutrophic peri-urban ponds. Along a turbidity gradient, vegetation switched from dominance by Stoneworts (Chara and Nitella spp.) in the clearest ponds, to dominance by Potamogeton pectinatus in ponds with a slightly lower water transparency. Despite the presence of both P. pectinatus and Stoneworts in each of the vegetated ponds, only one became dominant. Only a very low abundance (around 20%) of submerged vegetation was found in ponds of intermediate turbidity, while macrophytes were absent in turbid ponds. Multi-and univariate analysis showed a marked difference in chemical, physical and biological properties between ponds deliberately used for fish stocking and ponds that were not. Macrophyte cover was significantly negatively correlated with turbidity and plankti-benthivorous fish abundance. No such correlation was observed with piscivorous fish abundance, except for pike that were associated with a charophyte vegetation in the study ponds. The strong relationship found between fish abundance and turbidity, its negative effect on submerged vegetation cover, and the importance of submerged vegetation in controlling phytoplankton abundance, should be taken into account when selecting ponds for fish stocking. It also suggests that the study ponds have a good potential for ecological quality restoration by biomanipulation.

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“…Some aquatic plants can also convert bicarbonate ( HCO À 3 ) into CO 2 via dehydration ( Van den Berg et al, 2002), producing hydroxide (OH ) ), thereby further increasing water pH during the day. DO is a strong oxidant and therefore increases the midday oxidation-reduction potential (ORP) of stream water.…”

Section: Introductionmentioning

confidence: 99%

Geochemical and biological controls on trace metal transport in an acid mine impacted watershed

Butler

2006

Environ Geochem Health

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Water samples collected in an acid mine impacted watershed indicated that the concentrations of dissolved trace metals were diurnally influenced by mineral saturation, which is controlled primarily by pH and water temperature. Measurements taken suggested that these variations only occur at sample locations immediately downstream from the confluence of acidic and alkaline waters. It is at these locations where initial mineral precipitation occurred and where subtle changes in solubility were most affected, increasing trace metal removal when both the rate of photosynthesis (influencing pH in headwaters) and water temperature were at a maximum. The role of iron photoreduction (increased midday production of ferrous iron) on overall Cu, Mn, and Zn transport was also evaluated, but found to be inconclusive. Iron photoreduction may however influence adsorption and/or coprecipitation of trace metals through associated changes in oxidation state, solubility, and mineralogy of various iron colloids, which are produced upon the neutralization of acidic, metal enriched water. Furthermore, measured values of copper and zinc were compared to relative USEPA chronic criterion for exposure to continuous concentration (CCC) of metals by the calculation of a "toxicity unit" (TU). It was found that average values of both copper and zinc only exceeded the CCC (TU>1) in the acid mine-impacted Leona Creek. In general, zinc toxicity decreased while copper toxicity increased downstream of the confluence of the mine impacted Leona Creek and background Lion Creek (sampled at Lake Aliso), indicating a significant source of zinc in upstream, non mine-impacted samples.

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A comparative study of the use of inorganic carbon resources by Chara aspera and Potamogeton pectinatus

Cited by 78 publications

References 29 publications

Iron addition as a shallow lake restoration measure: impacts on charophyte growth

Iron addition as a shallow lake restoration measure: impacts on charophyte growth

Influence of submerged vegetation and fish abundance on water clarity in peri-urban eutrophic ponds

Geochemical and biological controls on trace metal transport in an acid mine impacted watershed

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