| 摘要: |
| 大型藻类在生长过程中吸收氮磷营养物质并进行光合作用，从而发挥生态修复和固定二氧化碳的重要作用。海带作为兼具经济价值和生态价值的典型大型藻类，其重要性不言而喻。本研究以海带（Saccharina japonica）为研究对象，以VENSIM可视化软件为平台，通过建立多种环境因子与海带生长的函数关系，构建海带多因子生长数学模型。结果表明，所建模型能够较好的模拟海带在不同环境条件下的生长状态。通过Morris函数计算了模型中各参数的灵敏度，分析了光照、温度和氮磷营养盐对海带生长的影响。研究发现：在海带养殖初期，受光照影响最大；在临近收获期，受高温的限制更为明显。除了养殖规模和养殖密度都比较大的海域，氮磷营养盐一般不会对海带生长产生抑制性影响，当营养盐成为限制因素时，氮营养盐的抑制性影响要大于磷。本研究所建模型可以对不同海区海带的生长状况和影响因素进行模拟和分析，从而为海带养殖海域的管理提供参考和借鉴。 |
| 关键词: 海洋生物学 海带 VENSIM 生长模型 灵敏度 |
| DOI：10.3969/J.ISSN.2095-4972.20220902002 |
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| 基金项目:浙江省科技计划项目(2023C03120，2022C02040)；浙江省自然资源厅项目(2021110396)；舟山市科技计划项目(2021C31026)；浙江海洋大学研究生教学质量系列工程“企业行业难题攻关项目” |
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| Multi-factor growth model for Saccharina japonica |
| CAI Huiwen,ZHANG Pingping,LIU Haozhen,ZHAO Sheng |
| (School of Marine Science and Technology, Zhejiang Ocean University,Zhoushan 316000, China) |
| Abstract: |
| Macroalgae play a very important role in marine ecosystem restoration by absorbing large amount of nitrogen and phosphorus, and fixing CO2 from the air through the photosynthesis process. Saccharina japonica is one of the essential macroalgae species in China, which has both economic and ecological value. In this paper, VENSIM was used to build the mathematical model for S. japonicagrowth. Results show that the model can simulate well the growth process of S. japonica under different environment conditions. The sensitivity was calculated by Morris function through which the importance of different environmental parameters can be analyzed. Results find that temperature and light were the two key factors which impact the growth of S. japonica mostly. The light influence was greater at the early period of cultivation while the temperature limited more at the harvesting stage. In general, the nutrients cannot limit the growth of S. japonica except on the areas of large culturing scale and high density (culturing). The impact of nitrogen was greater than phosphorus when nutrient limitation happened. The model built in this paper can provide a better way to simulate and analyze how the environmental parameters will impact the growth of S. japonica under different sea conditions, thus it can help on the macroalgae culture management. |
| Key words: marine biology Saccharina japonica VENSIM growth model sensitivity |
