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Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Assessment of coastal management options by means of multilayered ecosystem models
Author(s): Nobre, Ana M
Ferreira, Joao G
Nunes, Joao P
Yan, Xiaojun
Bricker, Suzanne
Corner, Richard
Groom, Steve
Gu, Haifeng
Hawkins, Anthony J S
Hutson, Rory
Lan, Dongzhao
Lencart e Silva, Joao D
Pascoe, Philip
Telfer, Trevor
Zhang, Xuelei
Zhu, Mingyuan
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Keywords: integrated coastal zone management
multilayered ecosystem model
catchment-coastal model
sustainable aquaculture
carrying capacity
SE Asia
Xiangsham Gang
Integrated coastal zone management China
Aquaculture Economic aspects China
Issue Date: Mar-2010
Date Deposited: 21-Apr-2010
Citation: Nobre AM, Ferreira JG, Nunes JP, Yan X, Bricker S, Corner R, Groom S, Gu H, Hawkins AJS, Hutson R, Lan D, Lencart e Silva JD, Pascoe P, Telfer T, Zhang X & Zhu M (2010) Assessment of coastal management options by means of multilayered ecosystem models. Estuarine, Coastal and Shelf Science, 87 (1), pp. 43-62.
Abstract: This paper presents a multilayered ecosystem modelling approach that combines the simulation of the biogeochemistry of a coastal ecosystem with the simulation of the main forcing functions, such as catchment loading and aquaculture activities. This approach was developed as a tool for sustainable management of coastal ecosystems. A key feature is to simulate management scenarios that account for changes in multiple uses and enable assessment of cumulative impacts of coastal activities. The model was applied to a coastal zone in China with large aquaculture production and multiple catchment uses, and where management efforts to improve water quality are under way. Development scenarios designed in conjunction with local managers and aquaculture producers include the reduction of fish cages and treatment of wastewater. Despite the reduction in nutrient loading simulated in three different scenarios, inorganic nutrient concentrations in the bay were predicted to exceed the thresholds for poor quality defined by Chinese seawater quality legislation. For all scenarios there is still a Moderate High to High nutrient loading from the catchment, so further reductions might be enacted, together with additional decreases in fish cage culture. The model predicts that overall, shellfish production decreases by 10%–28% using any of these development scenarios, principally because shellfish growth is being sustained by the substances to be reduced for improvement of water quality. The model outcomes indicate that this may be counteracted by zoning of shellfish aquaculture at the ecosystem level in order to optimize trade-offs between productivity and environmental effects. The present case study exemplifies the value of multilayered ecosystem modelling as a tool for Integrated Coastal Zone Management and for the adoption of ecosystem approaches for marine resource management. This modelling approach can be applied worldwide, and may be particularly useful for the application of coastal management regulation, for instance in the implementation of the European Marine Strategy Framework Directive.
DOI Link: 10.1016/j.ecss.2009.12.013
Rights: Published in Estuarine, Coastal and Shelf Science by Elsevier.

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