Sediments

Effler, Steven W.; Auer, Martin T.; Johnson, Ned A.; Penn, Michael R.; Rowell, H. Chandler

doi:10.1007/978-1-4612-2318-4_8

Cited by 6 publications

(1 citation statement)

References 104 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to Kufel & Kufel (), charophytes can produce more biomass than vascular plants, and the amount of precipitated carbonates was determined to constitute between 20% (Siong & Asaeda, ) and 70% (Blindow, ) of their dry mass. Assuming 60% cover of carbonates in the dry mass of charophyte thalli (Hutchinson, ), it is possible to determine the importance of dense charophyte meadows in the formation of carbonate sediments, in which the CaCO 3 content may exceed 80% (Hutchinson, ; Effler et al ., ; Pentecost et al ., ).…”

Section: Introductionmentioning

confidence: 99%

The significance of Chara vegetation in the precipitation of lacustrine calcium carbonate

et al. 2013

View full text Add to dashboard Cite

A significant portion of calcium carbonate is deposited in lake sediments as a result of biological processes related to the photosynthetic activity of phytoplankton in the pelagic realm and, in addition, macrophytes in the littoral zone. Lake Wigry, one of the largest lakes in Poland (north-east Poland), is characterized by: (i) carbonate sediments with a CaCO 3 content exceeding 80% within the littoral zone; and (ii) large areas of submerged vegetation dominated by charophytes (macroscopic green algae, Characeae family). It is claimed that charophytes are highly effective in utilizing HCO 3 À and forming thick CaCO 3 encrustations. Thus, this study was aimed at evaluating the CaCO 3 production by dense Chara stands overgrowing the lake bottom reaching a depth of 4 m. In late July 2009, the fresh and dry mass of plants, the percentage contribution of calcium carbonate and the production of CaCO 3 per 1 m 2 were investigated along three transects at three depths (1 m, 2 m and 3 m, with each sample area equal to 0Á0625 m 2 ) per transect. The composition and structure of phytoplankton and the physico-chemical properties of the water analysed in both the littoral and pelagic zones served as the environmental background and demonstrated moderately low fertility in the lake. The greatest dry plant mass exceeded 1000 g m À2 and CaCO 3 encrustations constituted from 59% to over 76% of the charophyte dry weight. Thus, the maximum and average values of carbonates precipitated by charophytes were 685Á5 and 438 g m À2 , respectively, which exceeded previously reported results. A correlation of carbonate production with the depth of Chara stands was detected, and intermediate depths offered the most favourable conditions for carbonate precipitation (589 g m À2 on average). As precipitated carbonates are ultimately stored in bottom deposits, the results highlight the significance of charophytes in lacustrine CaCO 3 sedimentation.

show abstract

Section: Introductionmentioning

confidence: 99%

The significance of Chara vegetation in the precipitation of lacustrine calcium carbonate

et al. 2013

View full text Add to dashboard Cite

show abstract

Effect of magnesium on charophytes calcification: implications for phosphorus speciation stored in biomass and sediment in Myall Lake (Australia)

Siong

Asaeda

2009

Hydrobiologia

View full text Add to dashboard Cite

We examined the effect of magnesium (Mg) on the charophytes calcite (CaCO 3 ) encrustation and assessed whether charophytes, growing on non-calcareous sediments in the Myall Lake, a poorly flushed shallow coastal lake with salinity of 2-3 PSU, could function as an effective nutrient sink for phosphorus (P) in a similar manner to charophytes growing on calcareous sediments of the freshwater calcium (Ca)-rich hardwater, i.e., through the formation of Ca-bound P. Our results showed that high Mg in the Myall Lake water reduced the calcification in charophytes. Likewise, the addition of Mg into the tap water also produced the same effect. The inhibition of the calcite formation decreased significantly the percentage of Ca-bound P formation in the charophyte biomass as well as in the sediment. However, the inability of charophytes in Myall Lake to precipitate calcite does not reduce the plant beds' capability to act as a P nutrient sink. Instead of Cabound P, a large percentage of less bioavailable nonreactive organically bound P (NaOH-P: 40-65%) fraction in the biomass, together with the plant's slow decomposition rate, will lead to burial of dead organic matter and an incomplete mineralization process. In particular, detritus of the charophyte plants' thalli is relatively more resistant to mineralization. This mechanism was supported by the result of sedimentary P fractionation in which the refractory P and non-reactive organic P fractions accounted for at least 80% of the total P.

show abstract

Annually laminated sediments from Onondaga Lake, New York (USA) provide a basis for high-resolution studies of lake degradation and recovery

et al. 2014

View full text Add to dashboard Cite

Sediments

Cited by 6 publications

References 104 publications

The significance of Chara vegetation in the precipitation of lacustrine calcium carbonate

The significance of Chara vegetation in the precipitation of lacustrine calcium carbonate

Effect of magnesium on charophytes calcification: implications for phosphorus speciation stored in biomass and sediment in Myall Lake (Australia)

Annually laminated sediments from Onondaga Lake, New York (USA) provide a basis for high-resolution studies of lake degradation and recovery

Contact Info

Product

Resources

About