Method, device and system for evaluating biological bearing capacity of marine ranch

Abstract

The invention discloses a method, a device and a system for evaluating the biological bearing capacity of a marine ranch based on multimode coupling. The method comprises the following steps: establishing a marine ranch hydrodynamic-ecological coupling model to couple hydrodynamic and biogeochemical processes; establishing a marine ranch energy flow model, connecting a hydrodynamic force-ecological coupling model to a data input end of the model to output data, constructing a multimode coupling model, and coupling energy flow, hydrodynamic force and biogeochemical processes; and calculating the biological bearing capacity of the marine ranch based on the multimode coupling model, and automatically evaluating the biological bearing capacity. According to the method, the marine ranch energy flow, hydrodynamic force and biogeochemical processes are coupled, the accuracy of marine ranch biological bearing capacity assessment is improved, the marine ranch biological bearing capacity assessment module is arranged, the biological bearing capacity assessment process is simplified, and the effectiveness and practicability of the biological bearing capacity assessment method are improved. The invention further discloses a device and a system for evaluating the biological bearing capacity of the marine ranch, which have the above beneficial effects.

Description

technical field [0001] The present invention relates to the field of marine pasture construction, in particular to a method, device and system for assessing the biological carrying capacity of marine pastures based on multi-mode coupling. Background technique [0002] Effectively assessing the biocapacity of marine ranching is one of the core contents of the construction of marine ranching, and it is also the guarantee for realizing the sustainable development of marine ranching. At present, the evaluation methods of marine pasture biocapacity at home and abroad mainly include empirical research method, instantaneous growth rate method, individual organism energy budget method, ecological dynamics method and nutritional dynamics method based on biogeochemical processes, etc. Among them, the empirical research method, the instantaneous growth rate method, and the energy budget method of individual organisms are all simple methods for estimating the biocapacity, without compre...

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Problems solved by technology

Among them, the empirical research method, the instantaneous growth rate method, and the energy budget method of individual organisms are all simple methods for estimating the biocapacity, without comprehensive consideration of factors such as food webs, flow fields, and basic productivity in marine pastures from the ecosystem level. The impact of bearing capacity, the evaluation accuracy is low

The ecological dynamics method based on biogeochemical processes mainly focuses on the ecological processes of low trophic levels in marine pastures, and cannot effectively simulate the process of biological food webs at higher trophic levels in marine pastures, and the accuracy of assessing the biocapacity of higher trophic levels is low.

[0003] Establishing the Ecopath energy flow model of marine pastures based on nutrient dynamics to evaluate the biocapacity is the main method for evaluating the biocapacity of marine pastures. However, the existing Ecopath model is a closed ecosystem model, which can only simulate the interaction between organisms in marine pastures. The nutrient process of the ecosystem cannot be simulated for the hydrodynamic process of the ecosystem and the related biogeochemical processes such as inorganic nutrients

On the one hand, ignoring the energy flow changes caused by water exchange between the marine ranch and the external environment makes the model unable to accurately describe the energy flow of the marine ranching ecosystem, and cannot achieve the purpose of accurately evaluating the biocapacity of the marine ranch; on the other hand, the nutritional Inorganic substances such as salt are fixed by primary producers such as phytoplankton to form the primary productivity of marine pastures. The existing Ecopath model cannot effectively simulate the primary productivity of marine pastures caused by changes in nutrients, temperature and other ecological factors because it cannot simulate the relevant biogeochemical processes. and biocapacity changes, affecting the accuracy of assessing marine ranching biocapacity

In addition, after the existing marine pasture Ecopath energy flow model is established, it is necessary to adjust the biomass of different biological functional groups one by one to evaluate the biocapacity, and the operation process is cumbersome and time-consuming

In summary, existing methods have certain shortcomings in accurately assessing the biocapacity of marine pastures

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