Primary production of Utricularia foliosa L., Egeria densa Planchon and Cabomba furcata Schult &amp; Schult.f from rivers of the coastal plain of the State of São Paulo, Brazil

Camargo, Antonio Fernando Monteiro; Pezzato, Maura Maria; Henry-Silva, Gustavo Gonzaga; Assumpção, Aline

doi:10.1007/s10750-006-0190-4

Cited by 22 publications

(12 citation statements)

References 3 publications

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“…Nutrients are heterogeneously distributed in natural habitats (Jackson and Caldwell, 1993;Gross et al, 1995); however, human activities have increased availability of nutrients in some aquatic ecosystems creating conditions to the macrophytes cover the surface of many lakes, reservoirs, rivers and ponds (Thomaz et al, 2003;Wilson et al, 2005). There are several examples of proliferation of some macrophytes species in aquatic environments impacted and non-impacted by organic pollution (Pieterse and Murphy, 1990;Thomaz et al, 2005;Camargo et al, 2006;Pitelli et al, 2008). A recent study showed that the growth of Salvinia molesta Mitchell was approximately 12 times higher in a reservoir impacted by aquaculture effluent (high concentration of nitrogen and phosphorus) than in a non-impacted reservoir (Pistori et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Estimating nitrogen and phosphorus saturation point for Eichhornia crassipes (Mart.) Solms and Salvinia molesta Mitchell in mesocosms used to treating aquaculture effluent

Henares

Camargo

2014

Acta Limnol. Bras.

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Aim:To evaluate the growth of Eichhornia crassipes (Mart.) Solms and Salvinia molesta Mitchell in tanks used for treating aquaculture effluent and compare the results with literature data in order to estimate the nutrients saturation point. Methods: An experiment with six rectangular fiberglass tanks were separated in two treatments, inflow and outflow (higher and lower nutrient concentration), and the two macrophytes above cited was carried out during 50 days. A floating quadrat with 0.25 m 2 of E. crassipes and S. molesta at inflow and outflow of the tanks was collected weekly for fresh mass measurement. At the beginning and end of the experiment samples of macrophytes were oven-dried at 60 °C until constant weight to determine the dry mass. Dry mass of plants was estimated by a simple linear regression analysis between fresh mass and dry mass (DM). Results: The N and P concentrations were significantly higher (P<0.05) in the inflow (mean of 0.66 mg L -1 and 233.6 mg L -1 , respectively) than in the outflow of the tanks (mean of 0.38 mg L -1 and 174.7 mg L -1 , respectively). However, no significantly different plant growth was observed for either higher or lower concentration. For both higher and lower nutrient concentrations, the biomass gain for E. crassipes was, respectively, 428.5 and 402.7 g DM.m 2 . For S. molesta, biomass gain was 135.2 and 143.1 g DM.m 2 , in the higher and lower concentrations, respectively. Others studies reported high growth of E. crassipes and S. molesta in concentrations of nitrogen (0.14 -0.18 mg L -1 ) and phosphorus (14.2 -77.0 mg L -1 ) lower than this study. Conclusion: The comparison of E. crassipes and S. molesta growth in this study with others allow us to assume that the saturation point of E. crassipes should be 0.26 mg L -1 of nitrogen and 77 mg L -1 of phosphorus and for S. molesta below 0.19 mg L -1 of nitrogen and 15.1 mg L -1 of phosphorus.Keywords: aquatic macrophytes, nutrients, growth, freshwater prawn, effluents.Resumo: Objetivo: Avaliar o crescimento de Eichhornia crassipes (Mart.) Solms e Salvinia molesta Mitchell em tanques utilizados para o tratamento de efluente de aquicultura e comparar os resultados com dados da literatura a fim de estimar o ponto de saturação de nutrientes. Métodos: Um experimento com seis tanques retangulares divididos em dois tratamentos, entrada e saída (maior e menor concentração de nutrientes, respectivamente), e as duas macrófitas aquáticas citadas acima foi realizado durante 50 dias. Um quadrante de 0,25 m 2 com amostras de E. crassipes e S. molesta da entrada e da saída dos tanques foi coletado semanalmente para estimar a massa fresca das macrófitas. No início e no final do experimento amostras das macrófitas foram secas em estufa a 60 °C até peso constante para determinar a massa seca. A massa seca das macrófitas foi estimada por regressão linear simples entre a massa fresca e a massa seca (MS). Resultados: As concentrações de N e P foram significativamente (P<0.05) 2014, vol. 26, no. 4, p. 420 -428 421 Estimating nit...

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Section: Introductionmentioning

confidence: 99%

Estimating nitrogen and phosphorus saturation point for Eichhornia crassipes (Mart.) Solms and Salvinia molesta Mitchell in mesocosms used to treating aquaculture effluent

Henares

Camargo

2014

Acta Limnol. Bras.

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“…In several countries, some species of floating aquatic macrophytes are used in constructed wetlands, because of their capacity to absorb and store large quantities of nutrients, and their rapid growth (Costa-Pierce, 1998;Ran et al, 2004;Redding et al, 1997). Although growth rates of floating macrophytes are expected to be very high in tropical areas, there are few investigations comparing different species in the tropics (e.g., Camargo et al, 2006;Thomaz et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Growth of free-floating aquatic macrophytes in different concentrations of nutrients

2008

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The objective of the study was to evaluate the effect of different concentrations of nitrogen and phosphorus on the growth of the free-floating aquatic macrophytes Eichhornia crassipes, Pistia stratiotes, and Salvinia molesta. The plants were cultured in 2,000-l outdoor concrete tanks. Triplicate tanks, with a continuous flow of effluent from culture ponds containing Nile tilapia, were used for each plant type (n = 3). The plant material was collected monthly from 0.25 m 2 floating quadrats, at the two ends of the tanks (higher nutrient concentrations near the inflow and lower nutrient concentrations near the outflow). In low nutrient concentrations, the maximum relative growth rates (RGRs) for E. crassipes (0.016/day) and P. stratiotes (0.016/day) were significantly lower (P B 0.05) than for S. molesta (0.029/day). There were no significant differences between the RGRs of S. molesta in the different nutrient concentrations.Eichhornia crassipes and P. stratiotes had their growth limited by nitrogen and phosphorus concentrations. The increase in plant density during the experiment probably also affected the growth of these species. In this context, E. crassipes and P. stratiotes can cause problems in nutrient-rich waterbodies, but under these experimental conditions their growth was limited by nitrogen and/or phosphorus concentrations. The growth of S. molesta was not influenced by the different nutrient concentrations.

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“…The higher temperatures and solar radiation usually found in tropical aquatic ecosystems enable macrophytes to show higher primary production rates over the entire year. Thus, various species of aquatic macrophytes (e.g., free-floating species) cover extensive areas, in both natural and man-made freshwater ecosystems (Camargo et al, 2003(Camargo et al, , 2006Martins et al, 2008;Silva et al, 2009). Unlike northern temperate regions, native species are considered the main nuisance plants in Neotropical regions (Marcondes et al, 2003;Thomaz et al, 2006;Martins et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Another alteration that especially favors the development of submerged species is the increase of underwater radiation after transforming a lotic into a lentic system (Kimmel et al, 1990;Figueiredo & Bianchini, 2008). For those reasons, various species grow in man-made freshwater ecosystems in tropical regions, with a surplus presence usually noted for Eichhornia crassipes, Egeria spp., Eleocharis sp., Ludwigia spp., Oxycaryum cubense, Pistia stratiotes, Salvinia spp., and Typha domingensis (Bini et al, 1999;Tanaka et al, 2002;Marcondes et al, 2003;Bianchini et al, 2006a, Camargo et al, 2006Thomaz et al, 2006;Martins et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

The decomposition of aquatic macrophytes: bioassays versus in situ experiments

2011

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In aquatic sciences, the agreement between laboratory and field observations remains a challenge. Using kinetic modeling, this research aims to compare the decomposition in laboratory and in situ conditions. In the in situ incubations, the mass decreases of the aquatic macrophytes (Echinodorus tenellus, Hydrocotyle verticillata, Najas microcarpa and Pontederia parviflora) were described using a litter bag technique and in the laboratory their decomposition was maintained under controlled conditions. The plants and water samples were collected from a tropical reservoir (Brazil). To describe the particulate organic carbon (POC) decay we adopted a two stage kinetic model that considered the heterogeneity of resources. The released organic carbon (i.e., losses related to mineralization, dissolution and sedimentation of smaller particles than the litter bag mesh) were used to compare the results derived from the field and laboratory incubations. Despite the methodological differences, the results show equivalence among the POC decay. The decomposition measured by litter bags method was 1.32 faster, owing to the effects of losses by sedimentation of the smaller particles, abrasion, action of decomposer organisms (e.g., fragmentation and enzymatic attack) and synergy among these factors. From a mathematical modeling approach, the results validate the use of decomposition data obtained under controlled conditions providing estimations of energy and matter fluxes within aquatic ecosystems. However, it is necessary to adopt a coefficient to acquire the similarity (e.g., 1.32).

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Primary production of Utricularia foliosa L., Egeria densa Planchon and Cabomba furcata Schult & Schult.f from rivers of the coastal plain of the State of São Paulo, Brazil

Cited by 22 publications

References 3 publications

Estimating nitrogen and phosphorus saturation point for Eichhornia crassipes (Mart.) Solms and Salvinia molesta Mitchell in mesocosms used to treating aquaculture effluent

Estimating nitrogen and phosphorus saturation point for Eichhornia crassipes (Mart.) Solms and Salvinia molesta Mitchell in mesocosms used to treating aquaculture effluent

Growth of free-floating aquatic macrophytes in different concentrations of nutrients

The decomposition of aquatic macrophytes: bioassays versus in situ experiments

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