A habitat suitability model for aquaculture site selection: Ria de Aveiro and Rias Baixas.
A habitat suitability model for aquaculture site selection: Ria de Aveiro and Rias Baixas.
复制标题
水产养殖地点选择的栖息地适宜性模型：Ria de Aveiro 和 Rias Baixas。
DOI：
10.1016/j.scitotenv.2021.149687
复制
发表时间：
2021
影响因子：
9.8
通讯作者：
J. Dias
中科院分区：
文献类型：
--
作者：
L. Vaz;M. Sousa;M. Gómez;J. Dias
水产养殖是全球增长最快的活动之一。该部门的这种强劲和快速发展往往反映在对环境的重大影响和沿海地区管理方面的新挑战上。在这方面，这项工作旨在通过提出一种创新的方法来促进该部门的可持续性，以确定在Ria de Aveiro(葡萄牙)和Rias Baixas(西班牙)的最佳水动力和水质条件下，确保鱼类和贻贝水产养殖可持续扩展的最佳地点。基于可变适宜性函数的定义，建立了栖息地模型，将水动力和水质模拟结果整合到适宜性指数中。结果表明，22%的Ria de Aveiro非常适合养鱼。相反，由于水温的垂直梯度和低氧的季节性事件，不建议在Rias Baixas生产中上层鱼类。就贻贝而言，栖息地模型将Ria de Aveiro地区31%的区域归类为非常适合生产的区域，而Rias Baixas地区的大部分地区呈现这种最高分类，证实了该地区的高度开发。水产养殖开发适宜区的界定与Ria de Aveiro和Rias Baixas不同的地貌、水文和生物地球化学过程高度相关。Ria de Aveiro的结果表明，从水质的角度来看，上游地区是最脆弱的，这突显了环礁湖水质中平流过程的重要性，而Rias Baixas的动态变化与分层更相关。在Rias Baixas，水温和溶解氧的强烈垂直梯度阻碍了鱼类的可持续生长速度。因此，这项工作证明了所提出的基于水动力和生物地球化学模型的方法在规划水产养殖扩展时支持决策过程的潜力。
Aquaculture is one of the fastest-growing activities worldwide. This strong and rapid development of the sector tends to be reflected in significant environmental impacts and new challenges in the management of the coastal areas. In this context, this work intends to contribute to the sustainability of the sector, by proposing an innovative method to identify preferred locations to ensure sustainable expansion of fish and mussels aquaculture, under optimal hydrodynamic and water quality conditions in Ria de Aveiro (Portugal) and Rias Baixas (Spain). A habitat model was developed, integrating hydrodynamic and water quality modelling results into a suitability index based on the definition of variable suitability functions. The results show that 22% of Ria de Aveiro is very good for fish production. In contrast, the production of pelagic fish in Rias Baixas is not recommended due to vertical gradients of water temperature and seasonal events of hypoxia.Concerning to mussels, the habitat model classifies 31% of Ria de Aveiro area as very good for production, while most of the Rias Baixas area presents this highest classification, confirming the high exploitation of the region. The definition of appropriate areas for aquaculture exploitation is highly related with the different geomorphological, hydrological and biogeochemical processes of Ria de Aveiro and Rias Baixas. Results for Ria de Aveiro indicate that the upstream areas are the most vulnerable from the water quality point of view, highlighting the importance of the advective processes in the lagoon's water quality, in opposition to Rias Baixas dynamics, where stratification is more relevant. In Rias Baixas, the strong vertical gradient of water temperature and dissolved oxygen prevents fish from having sustainable growth rates. Therefore, this work demonstrated the potential of the proposed method based on hydrodynamic and biogeochemical modelling to support the decision-making process in planning aquaculture expansion.