Lake restoration through mechanical harvesting of aquatic vegetation

Wile, I.

doi:10.1080/03680770.1974.11896109

Cited by 3 publications

(2 citation statements)

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“…The authors concluded that this species had a smaller nitrogen concentration and a smaller amount of cellulosic matter than other submerged macrophytes, although it was responsible for half of the primary production of macrophytes in the lake studied. Wile (1975) found lower concentrations of phosphorus (between 0.3 and 1.2 mg.g -1 DW) and nitrogen (ranging from 5 to 15 mg.g -1 DW) in Chara sp. Similar average values were mentioned by Duarte (1992), with 19 mg.g -1 DW for nitrogen, ranging from 4.0 to 44.0 mg.g -1 DW, and phosphorus with an average value of 1.0 mg.g -1 DW, ranging from 0.1 to 4.5 mg.g -1 DW.…”

Section: Nutrient Concentration In Biomassmentioning

confidence: 80%

Charophytes as a nutrient and energy reservoir in a tropical coastal lagoon impacted by humans (RJ, Brazil)

2004

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In the Imboassica Lagoon (22 degrees 24'S and 42 degrees 42'W) (Macaé, RJ, Brazil), two species of macroalgae of the genus Chara (C. angolensis and C. fibrosa) registered in large areas were identified. The lagoon is subject to several relevant anthropic impacts, of which untreated sewage is one of the most important. Results of the biomass distribution as analyzed in different areas of the lagoon showed values ranging from 172 to 510 gDW x m(-2). As for the nutrient concentration, the results presented large fluctuations, with carbon values ranging from 325 to 392 mg x g(-1)DW, those of nitrogen, from 14 to 27 mg x g DW, and of phosphorus from 0.45 to 0.85 mg.g(-1) DW. This led to large fluctuations of the C:N:P ratio (from 387:24:1 to 872:47:1). The minimum and maximum energetic values of the biomass were 9.54 e 12.34 kJ x g(-1)DW. Smaller C:N:P ratios tended to occur in more eutrophic areas. The association between biomass and nutrient concentration showed that the highest quantities in the beds are found in oligotrophic areas. The Spearman correlation between nutrient concentration in the water column and biomass was r(s) = 0.45 (p < 0.05) for nitrogen and r(s) = 0.50 (p < 0.01) for phosphorus (n = 30). The large total biomass associated with nutrient concentration and energy content indicates that Charophytes are an important biological compartment in the structure and metabolism of the lagoon.

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Section: Nutrient Concentration In Biomassmentioning

confidence: 80%

Charophytes as a nutrient and energy reservoir in a tropical coastal lagoon impacted by humans (RJ, Brazil)

2004

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“…According to Gerloff and Krombholz (1966) and Fujita et al (1989), the minimum concentration phosphorus for maximum growth is 1.3 mg g )1 dw. Schuette and Alder (1929) observed that Chara species had a phosphorus concentration of 0.6 mg g )1 dw while Wile (1975) reported phosphorus concentration ranging from 0.3 to 1.2 mg g )1 dw in Chara species. Comparable values were reported by Duarte (1992) with phosphorus concentrations ranging between 0.1 and 4.5 mg g )1 dw.…”

Section: Concentration Of Total Nutrients In Macrophyte Tissues Acrosmentioning

confidence: 95%

Phosphorus concentration in sediment, water and tissues of␣three submerged macrophytes of Myall Lake, Australia

Shilla

Asaeda

Siong

et al. 2006

Wetlands Ecol Manage

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Phosphorus content in sediment, water and tissues of three macrophyte species growing in Myall Lake, Australia were studied from January to November, 2004. The sites investigated were North-West (NW), North-East (NE), South-West (SW) bays and Central deep area of the lake (CL). The objective of this study was to investigate how total phosphorus (TP) in plant tissues relate to phosphorus pools and the role played by the aquatic macrophyte species under investigation in phosphorus recycling in the lake. Of the four investigated sites of the lake, TP in plant tissues were significantly higher in NorthWest and South-West bays compared to the rest. Najas marina had significantly higher TP content (e.g., 1.55 and 1.44 mg/g dw.; P < 0.05) for NW and SW respectively, than the other two species. N. marina is a rooted macrophyte while charophytes (C. fibrosa and Nitella hyalina) are pseudorooted macrophytes. Total phosphorus in the sediment and water column were significantly higher in Central deep area of the lake compared to the other three bays (P < 0.05, n 5). Soluble reactive phosphorus (SRP) and total dissolved phosphorus (TDP) in sediment pore water correlated significantly with phosphorus content in the tissue of N. marina ( r 2 SRPÀN: marina ¼ 0:95; r 2 TDPÀN: marina ¼ 0:92) as well as TP in sediment ( r 2 SRPÀTP ¼ 0:90 and r 2 TDPÀTP ¼ 0:81). Using the two-compartmental uptake model, it was observed that, sediment was the main compartment through which Ni. hyalina obtained phosphorus while for the other two species, water column was the uptake route for the phosphorus. These correlations suggest that, water column and sediments are important pathways for phosphorus uptake in plants.

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Advantages and Disadvantages of Aquatic Plant Management Techniques

Madsen¹

2000

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Lake restoration through mechanical harvesting of aquatic vegetation

Cited by 3 publications

References 1 publication

Charophytes as a nutrient and energy reservoir in a tropical coastal lagoon impacted by humans (RJ, Brazil)

Charophytes as a nutrient and energy reservoir in a tropical coastal lagoon impacted by humans (RJ, Brazil)

Phosphorus concentration in sediment, water and tissues of␣three submerged macrophytes of Myall Lake, Australia

Advantages and Disadvantages of Aquatic Plant Management Techniques

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