草本植物地上地下与两类食植者的动力学研究
发布时间：2018-11-28 15:17
【摘要】：两类食植者捕食同一种草本植物这种资源利用型竞争的动力学行为已经被广泛研究.然而大部分研究忽略了草本植物的生长特性,即在没有草本植物地上部分时,地下部分会向地上部分转移能量,帮助地上部分实现再生长.本文基于生态化学计量学建立了植物地上地下与两类食植者之间的动力学模型.理论分析探究了草本植物地上部分氮碳比与食植者体内氮碳比的大小关系对食植者种群增长和繁殖的影响.数值分析探究了影响系统动力学行为的两个重要因素,即氮元素密度和环境容纳量.本文揭示了在氮元素密度限制的情形下两类食植者出现竞争优势的内在机制.
[Abstract]:The dynamics of two herbivores preying on the same herbaceous plant has been widely studied. However, most studies have neglected the growth characteristics of herbaceous plants, that is, when there is no herbaceous aboveground part, the underground part will transfer energy to the aboveground part to help the aboveground part to achieve regrowth. Based on ecochemometrics, a dynamic model between plant aboveground and underground and two types of herbivore was established. The effects of the ratio of nitrogen to carbon on the population growth and reproduction of herbivores were studied theoretically and the relationship between the ratio of nitrogen and carbon in the aboveground part of herbaceous plants and the ratio of nitrogen to carbon in herbivores was studied. Two important factors affecting the dynamic behavior of the system, namely, the nitrogen element density and the environmental capacity, are explored by numerical analysis. In this paper, the internal mechanism of competitive advantage of two types of herbivores under the condition of nitrogen density limitation is revealed.
【学位授予单位】：东北师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O175
本文编号：2363259
[Abstract]:The dynamics of two herbivores preying on the same herbaceous plant has been widely studied. However, most studies have neglected the growth characteristics of herbaceous plants, that is, when there is no herbaceous aboveground part, the underground part will transfer energy to the aboveground part to help the aboveground part to achieve regrowth. Based on ecochemometrics, a dynamic model between plant aboveground and underground and two types of herbivore was established. The effects of the ratio of nitrogen to carbon on the population growth and reproduction of herbivores were studied theoretically and the relationship between the ratio of nitrogen and carbon in the aboveground part of herbaceous plants and the ratio of nitrogen to carbon in herbivores was studied. Two important factors affecting the dynamic behavior of the system, namely, the nitrogen element density and the environmental capacity, are explored by numerical analysis. In this paper, the internal mechanism of competitive advantage of two types of herbivores under the condition of nitrogen density limitation is revealed.
【学位授予单位】：东北师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O175
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