The role of macroalgae and detritus in the nutrient cycles in a shallow-water dystrophic lagoon

Viaroli, Pierluigi; Naldi, Mariachiara; Christian, R. R.; Fumagalli, I.

doi:10.1080/03680770.1992.11900319

Cited by 17 publications

(20 citation statements)

References 7 publications

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“…12). The width of the macroalgal bed is in agreement with the spatial distribution recorded in a grid of 10 stations within SG in 1991 and 1992 (Viaroli et al, 1993).…”

Section: Phytoplankton and Zooplanktonsupporting

confidence: 68%

“…4). The supersaturation conditions detected in spring coincided to a large extent with the development of Ulva in SG (Viaroli et al, 1993). The spatial distribution of oxygen in the water column and pore water (Fig.…”

Section: Nutrients and Oxygen Dynamicsmentioning

confidence: 99%

“…The macroalgae spreading within SG and the spatial distribution of Ulva were of great importance in driving the seasonal evolution of the lagoon trophic conditions that only a 3D model can address. Following experimental observations (Viaroli et al, 1993, Ulva growth was initialized in two confined parts of the lagoon and then a low drifting with water currents was assumed (Menesguen, 1992). Ulva attained the maximum development in June, when the biomass peak was reached in the eastern sheltered zone (Fig.…”

Section: Phytoplankton and Zooplanktonmentioning

confidence: 99%

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Integrated modelling in coastal lagoons: Sacca di Goro case study

et al. 2008

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A coupled 3D hydrodynamic-biogeochemical model was developed and implemented for the Sacca di Goro coastal lagoon. The model considers nutrient and oxygen dynamics in water column and sediments. Among the biological elements, phytoplankton, zooplankton, bacteria, Ulva sp. and commercial shellfish (Tapes philippinarum) were taken into consideration. Nutrients fluxes from the watershed and open sea, as well as atmospheric inputs, heat flux, light intensity and wind shear stress at the water surface constituted the model forcing functions.The comparison of numerical results with available measurement data indicated that the model was able to capture the essential dynamics of the lagoon. This model has also been used to estimate clam productivity and its impacts on water quality and lagoon properties.

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“…12). The width of the macroalgal bed is in agreement with the spatial distribution recorded in a grid of 10 stations within SG in 1991 and 1992 (Viaroli et al, 1993).…”

Section: Phytoplankton and Zooplanktonsupporting

confidence: 68%

Section: Nutrients and Oxygen Dynamicsmentioning

confidence: 99%

Section: Phytoplankton and Zooplanktonmentioning

confidence: 99%

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Integrated modelling in coastal lagoons: Sacca di Goro case study

et al. 2008

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“…This situation is usually characterized by an increased level of nutrients (NH 4 , NO 3 , PO 4 ) and suspended particulate matter in the water column, by nitrogen and phosphorus enrichment of sediments, by dissolved oxygen depletion which can lead to anoxic crisis in summer, and the frequent occurrence of macroalgal blooms (Zaouali, 1977;De Casabianca, 1983;Comin, 1984;Sfriso et al, 1988;Viaroli et al, 1993;Lundin and Linden, 1993;De Casabianca et al, 1994). If water inputs and their high nutrient loads are generally used to explain eutrophication in coastal lagoons, primary productivity, sediments and occasionally secondary productivity, also play a key role in nutrient recycling, and thus play a great part in sustaining eutrophic conditions.…”

Section: Introductionmentioning

confidence: 96%

Seasonal changes of nutrients in water and sediment in a Mediterranean lagoon with shellfish farming activity (Thau Lagoon, France)

Casabianca

Laugier

Marinho‐Soriano

1997

ICES Journal of Marine Science

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“…1) is a shallow lagoon in the Po River Delta, with a mean depth of 1.5 m and an overall area of 26 km 2 . It is characterized by strong anthropogenic eutrophication due to high nutrient inflow from the Po River, and is subject, especially in summer, to extensive seaweed blooms which lead to dystrophic events and high mortality rates of the benthic fauna (Viaroli et al 1993).…”

Section: Methodsmentioning

confidence: 99%

Density and temperature-dependence of vital rates in the Manila clam Tapes philippinarum: a stochastic demographic model

Melià¹,

Leo²,

Gatto

2004

Mar. Ecol. Prog. Ser.

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We developed a demographic and management model for the Manila clam Tapes philippinarum (one of the most important commercial mollusc species in Europe) from data collected in the Sacca di Goro lagoon, Italy. Herein, we describe growth and survival processes by 2 submodels incorporating temperature-driven fluctuations in vital parameters, density-dependent effects on survival, and sediment type as an indicator of the hydrodynamic regime. Nonlinear fitting and nonparametric statistics are used to calibrate the body growth and survival models from the available data and to associate a probability distribution to parameter estimates. The 2 models are stochastic in their formulation to account for environmental variability. We assess the suitability of our model to reproduce the life cycle of T. philippinarum at other sites by applying our model to data from the Bassin d'Arcachon (France) and the Eo estuary (Spain). We use Monte-Carlo simulations to forecast the expected biomass yield corresponding to different seeding and harvesting times along with its confidence intervals. The maximum obtainable yield is about 6 kg m -2 and can be obtained by seeding in spring and harvesting in late fall of the following year. We show, however, that there is a tradeoff between maximizing the average yield and minimizing yield variance.

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The role of macroalgae and detritus in the nutrient cycles in a shallow-water dystrophic lagoon

Cited by 17 publications

References 7 publications

Integrated modelling in coastal lagoons: Sacca di Goro case study

Integrated modelling in coastal lagoons: Sacca di Goro case study

Seasonal changes of nutrients in water and sediment in a Mediterranean lagoon with shellfish farming activity (Thau Lagoon, France)

Density and temperature-dependence of vital rates in the Manila clam Tapes philippinarum: a stochastic demographic model

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