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Simulation Model And Experimental Study On The Symbiosis System Of Fig And Fig Wasp Under Environmental Pressure

Posted on:2021-03-24Degree:MasterType:Thesis
Country:ChinaCandidate:S CuiFull Text:PDF
GTID:2370330614958554Subject:Control engineering
Abstract/Summary:PDF Full Text Request
With the advancement of human science and technology and the expansion of the scope of activities,the use of fossil fuels is also increasing while generating a large amount of greenhouse gases,which will cause the temperature of the earth to rise and make the living environment worse.In tropical and subtropical forests,the banyan tree is one of the main tree species,its fruit is the main food source of many animals,and the banyan tree-ficus bee system itself is also one of the important models for studying symbiotic systems,and its unique inflorescence structure And the breeding system and obligate pollinating Ficus hornet constitute a highly specific and mutually beneficial symbiotic system.Once one of the objects is affected or even extinct due to changes in the living environment,it may have adverse consequences on the ecological environment.In view of the important position of this symbiotic system in the ecosystem,this paper studies the impact of environmental changes on the symbiotic system of ficus and ficus wasps.Considering the longer time span for conducting real experiments,the research cost is higher and artificial intervention in the environment for the experiment It is extremely difficult to control,and the establishment of biological simulation models will not be subject to such constraints,so this article chooses to establish biological simulation models for experiments.This article refers to the data of the Ficus hirta,a dioecious tree in Guangdong,China,and proposes a simulation model of the symbiotic system.According to the research needs,the model is split into a model without the Fig wasp and a model with the Fig wasp.The verification experiment was designed by adding the Ficus bee model,the purpose was to explore the proportion of ficus fruit in different periods when the final experiment was initialized,and then the model verification experiment of the Ficus bee model was added,and the obtained data was compared with the actual data.The availability of this model has been confirmed,and the effect of temperature changes on the number of ficus wasps and the number of ficus seeds was finally studied.This paper finds that when the temperature changes,there is a significant difference in the number of Ficus bee populations in this symbiotic system and the number of seeds in the inflorescence of Ficus(1)when the temperature increases,the number of Ficus bee populations in the flight stage decreases significantly,(2)At a certain temperature(normal temperature +7?),the number of ficus bees in the incubation stage does not change much.When the temperature is exceeded,the population fluctuation will change significantly,and it will become extinct at normal temperature +10?.(3)When the temperature exceeds +7?,the number of seeds decreases with increasing temperature.(4)When the temperature reaches the point that the Ficus bee cannot survive and lasts for about a certain day,the Ficus bee will have a certain probability of extinction.It is confirmed that the temperature change will affect or even exterminate the ficus wasp,which in turn affects the fertilization and reproduction of the ficus tree.This paper hopes that this research can provide guidance suggestions for relevant ecological departments,and make timely response strategies for environmental changes to minimize losses.
Keywords/Search Tags:symbiosis system, dioecism, simulation model, fig, fig wasp
PDF Full Text Request
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