鸟巢蕨巢基结构发育及其高位土的形成机制研究

Asplenium nidus L.(Bird’s nest fern) is a typical representative epiphytes in canopy in Hainan rainforest, which is of great significance in maintaining the stablity of the triopical forest biodiversity, and is also an important ornamental plant in horticulture. It has a rosette base harboring suspended soil that can supply nutrients for its growth. The study of the formation system, carbon and nitrogen distribution, transformation and transfer process, and microbial population participating in the process of its suspended soil will help further clarify microbial population and structure development of its formation. We will study the transformation of "carbon(C)"and "nitrogen(N)" elements and their migration relationships and try to clarify the formation mechanism of the rossette and law of nutrient cycle of the suspended soil of the fern. Based on the comprehensive survey of biological characteristics, growth medium physicochemical properties, host functional traits in the original habitat of the fern, we will analyze the distribution pattern, the relationship between the properties of the biological and non biological epiphytic environment, the natural habit limit in Hainan tropical rainforest in the valley, which can clarify the suspended soil formation mechanism and reveal the characteristics of ecological island. The results not only help to understand the formation the hanging gardens in tropical rain forest , but also explain the survival strategy of a species of epiphytic taxa, and provide a theoretical basis for the conservation of canopy epiphytes in Hainan tropical rainforest .

鸟巢蕨(Asplenium nidus L)是海南岛热带雨林林冠附生植物的典型代表，也是园艺产业中重要的观赏植物。研究鸟巢蕨高位土壤形成体系中，碳、氮元素的分配、转化和迁移过程，及参与此过程的微生物的种群和数量，有利于进一步阐明微生物种群及结构与“碳”、“氮”元素转化迁移之间的关系，探明巢基发育、高位土的形成机理和养分循环规律。本项目在全面调查原生境中鸟巢蕨生物学特性、生长介质理化性质、宿主功能性状的基础上，深入研究鸟巢蕨在海南热带沟谷雨林中的分布格局及附生的生物与非生物环境特性之间的关系，进而揭示原生境中限制鸟巢蕨分布的生物与非生物环境因子，阐明其巢基及高位土的形成机理，揭示其自身生态岛特点。研究结果不仅有助于对热带雨林奇观之一的空中花园形成机理深入了解，阐明附生类群物种的生存策略，且为保护海南热带雨林的林冠附生植物多样性保育提供理论依据。

鸟巢蕨(Asplenium nidus L)是海南岛热带雨林林冠附生植物的典型代表，也是园艺产业.中重要的观赏植物。研究鸟巢蕨高位土壤形成体系中，碳、氮元素的分配、转化和迁移过程，.及参与此过程的微生物的种群和数量，有利于进一步阐明微生物种群及结构与“碳”、“氮”.元素转化迁移之间的关系，探明高位土的形成机理和养分循环规律。本项目在全面调查原生境.中鸟巢蕨生物学特性、生长介质理化性质、宿主功能性状的基础上，深入研究鸟巢蕨在海南热.带沟谷雨林中的分布格局及附生的生物与非生物环境特性之间的关系，进而揭示原生境中限制.鸟巢蕨分布的生物与非生物环境因子，阐明其高位土的形成机理，揭示其自身生态岛特点。研.究结果不仅有助于对热带雨林奇观之一的空中花园形成机理深入了解，解释附生类群物种的生.存策略，且为保护海南热带雨林的林冠附生植物多样性保育提供理论依据。