Estimating ecological carrying capacity for finfish mariculture (CROSBI ID 561525)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Geček, Sunčana ; Jusup, Marko ; Klanjšček, Jasminka ; Legović, Tarzan
engleski
Estimating ecological carrying capacity for finfish mariculture
Adding finfish mariculture to a marine ecosystem increases eutrophication in the water column and sedimentation below the nets pens. This, in turn, alters functioning of the ecosystem and may adversely affect its organisms, including cultured fish. To maximize production while ensuring sustainibility, we need to know the critical production level at which ecological impact becomes unacceptable. That level is called ecological carrying capacity (ECC) of the ecosystem (MyKindsey et al., 2006). To estimate ECC, we consturcted a model which simulates interactions between mariculture facilities and the environment. We began by adopting set of limiting conditions based on Stigebrandt et al. (2004). NExt we formulated a set of equations that capture the complex interplay of environmental state variables (phytoplankton biomass density, dissolved inorganic nutrients and seawater oxygen concentration) with forcing functions (density of cultured fish and natural irradiance variations). During model construction, we derived novel parameterisation for the (i) emission of inorganic nutrients from a mariculture, (ii) phytoplankton oxygen production and respiration and (iii) oxygen consumption due to bacterial degradation of particulate organic matter. Using the model, we found the ECC which is complient with the listed limiting conditions in an idealised box. To make the estimate applicable to real-life situations, we coupled the box model with a physical model for hydrodynamics and transport. We then calculated ECC for finfish mariculture near Cape Bolinao, Philippines. Simulation results lead to conclusion that spatial distribution of net pens largely affects the ECC.
ecological carrying capacity; finfish mariculture
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Podaci o prilogu
182-182.
2007.
objavljeno
Podaci o matičnoj publikaciji
ECEM '07 Conference proceedings
Solidoro, Cosimo
Trst:
Podaci o skupu
The 6th European Conference on Ecological Modelling
poster
27.11.2007-30.11.2007
Trst, Italija