Modeling approach to regime shifts of primary production in shallow coastal ecosystems

Zaldı́var, J.M.; Bacelar, Flora S.; Dueri, Sibylle; Marinov, Dimitar; Viaroli, Pierluigi; Hernández-Garcı́a, Emilio

doi:10.1016/j.ecolmodel.2009.01.022

Cited by 28 publications

(14 citation statements)

References 40 publications

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“…Scheffer et al (2003) developed a model for assessing regime shifts in shallow aquatic ecosystems. A modeling approach for analyzing regime shifts of primary production in shallow coastal ecosystems and identifying nutrient thresholds causing regime shifts has been proposed by Zaldívar et al (2009). The approach was based on previous existing and validated models developed for Mediterranean coastal lagoons and focused on the analysis of different scenarios for ecosystems subjected to strong anthropogenic pressures.…”

Section: Eutrophication Thresholds and Regime Shifts In The Mediterramentioning

confidence: 99%

Eutrophication and environmental policy in the Mediterranean Sea: a review

Karydis

Kitsiou

2011

Environ Monit Assess

100

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The Mediterranean Sea is a semienclosed basin connected with the open sea mainly through the Strait of Gibraltar. Due to the circulation pattern and the long residence time ranging between 80 and 100 years, the Mediterranean Sea is a sensitive environment to eutrophication pressures. The main body of water of the Mediterranean is characterized by very low nutrient concentrations, and therefore, the Mediterranean is classified among the most oligotrophic (very poor waters in nutrients) seas of the world's oceans. However, some coastal areas, mainly in the northern part of the basin, receive excessive loads of nutrients from sewage effluents, river fluxes, aquaculture farms, fertilizers, and industrial facilities, showing intense eutrophic phenomena with many adverse effects for the marine ecosystem and humans. Various national and international authorities, in addition to monitoring, have taken legal and administrative measures to mitigate eutrophication trends in the area. The Mediterranean environment is a good paradigm of integration of extensive legal framework, scientific knowledge, and administrative practices. The Barcelona Convention, the Mediterranean Action Plan, and European Union Directives on water quality and coastal management, together with scientific information derived from international research programs in the Mediterranean, provide a sound background for practical actions in eutrophication problems. In the present work, the problem of coastal eutrophication in the Mediterranean is reviewed in connection with public policies of the Mediterranean States based on national and international legislation and scientific knowledge on Mediterranean oceanography-ecology and actions coordinated by international bodies. These common actions and practices on coastal management are also discussed in relation to the need for sustainable development and protection of the coastal zone in the Mediterranean Sea.

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Section: Eutrophication Thresholds and Regime Shifts In The Mediterramentioning

confidence: 99%

Eutrophication and environmental policy in the Mediterranean Sea: a review

Karydis

Kitsiou

2011

Environ Monit Assess

100

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“…Carbon transfer from leaves to roots was parameterized by using a translocation coefficient tr (dimensionless) based on Olesen and Sand-Jensen (1993). This coefficient was used in existing seagrass models (Bocci, Coffaro, and Bendoricchio, 1997;Elkalay et al, 2003;Zaldivar et al, 2009). The growth rate G (1/d) is expressed as Equation (3):…”

Section: Model Equationsmentioning

confidence: 99%

“…A number of existing models included formulations about the uptake of dissolved inorganic nitrogen and about processes related to the plant's internal nitrogen (Aveytua-Alcazar et al, 2008;Bocci, Coffaro, and Bendoricchio, 1997;Zaldivar et al, 2009). Dissolved inorganic phosphorus is a dominant component in total phosphorus pools in marine coastal waters, and it was identified as a limiting nutrient to seagrass production (Touchette and Burkholder, 2000;Zhang and Huang, 2011).…”

Section: Introductionmentioning

confidence: 99%

Modelling Seagrass Biomass and Relative Nutrient Content

Kenov¹,

Deus

Alves

et al. 2013

Journal of Coastal Research

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Kenov, I.A.; Deus, R.; Alves, C.N., and Neves, R., 2013. Modelling seagrass biomass and relative nutrient content.A generalized model was developed for the simulation of Zostera noltii dynamics by considering the plant's growth and decay in response to light, temperature, space availability, photoperiodicity, and dissolved nutrients in water and in sediment. Sensitivity analysis was carried out to establish the influence of model parameters on the overall results. It was found that the most sensitive parameters were those related to mortality, internal nutrient content, and translocation of carbon from leaves to roots. A preliminary calibration of the model was carried out to estimate parameters specific for Z. noltii. Afterward, the model was verified with experimental data of Z. noltii biomass. The verification results showed that the set of parameters found by calibration enabled the simulation of the Z. noltii biomass. The proposed model was used to simulate both nitrogen and phosphorus metabolism in the plant. The results of the simulations revealed that the plant was limited by nitrogen and phosphorus in the spring/summer and was less limited by nutrients in the winter. In the future, the model can be improved in terms of both description and parameterization of the processes.

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“…growth dynamics have been developed and applied for general scenarios (e.g., primary production regime shifts, Zaldívar et al, 2009) as well as specific case studies (e.g., Bendoricchio et al, 1994;Salomonsen et al, 1999;Brush and Nixon, 2010;Ren et al, 2014). For most applications, the model output of primary interest is either net primary production (growth) or absolute biomass (standing stocks).…”

Section: Introductionmentioning

confidence: 99%