不同演替阶段森林植被生态对策谱的构建及其驱动因素

The vegetation ecological strategy spectrum is the overall characteristics of long-term adaptation to biological and abiological environment of all the species that make up the vegetation. The vegetation ecological strategy spectrum is of vital theoretical significance in analyzing the macroscopic relationship between vegetation and environment. .In this project, the typical tropical lowland rainforests on Hainan island were selected as our study subjects. A number of our already established forest dynamics plots as a platform, based on the investigation, as well as measring major functional traits of woody plants and environmental factors, and combined with information gathering from online available common databases, the vegetation ecological strategy spectrum will be constructed, and its variation pattern with successional stages will be compared. The key functional traits influenced forest vegetation ecological strategy spectrum also will be identified. On these basis, we will explore the relative contribution of biological and environmental factors driving vegetation ecological strategy spectrum. The results of this project are expected to make significant contributions to theoretical expansion for the study of biodiversity and ecosystem function.

植被生态对策谱是组成植被的所有植物对其生境中生物与非生物环境之间长期适应的总体表征，对于分析植被与环境之间的宏观关系具有重要理论意义。本项目以我国海南岛热带低地雨林不同演替阶段的森林植被为对象，以已建立的多个固定样地为平台，在群落调查、植物功能性状及环境因子测定和对已有数据库挖掘的基础上，构建森林植被的生态对策谱，分析其随森林演替的变化规律，辨识影响森林植被生态对策谱的关键功能性状，探究驱动森林植被生态对策谱演替动态的关键生物、非生物因素及其相对贡献，阐明森林植被生态对策谱的演替动态规律，以拓展生物多样性与生态系统功能研究理论。

植被的生态对策谱实际上反映了组成植被的所有物种对其所在区域生物和非生物环境的适应特征，对于分析植被与环境之间的宏观关系具有重要理论意义。本项目以我国热带低地雨林不同演替阶段的森林群落为研究对象，以群落调查数据、环境因子测定，结合主要植物功能性状、生活史特征数据为基础，构建不同演替阶段森林植被生态对策谱，研究基于植物功能性状和生活史特征构建的森林植被生态对策谱随演替阶段的变化趋势，解析影响不同演替阶段森林植被生态对策谱的环境因子，阐明森林植被生态对策谱演替变化的关键驱动因素。结果表明：（1）植被生态对策谱在不同演替阶段差异显著；（2）在演替过程中，植物获取的资源在性状之间出现了更复杂的权衡，具有更复杂的平衡和功能性状组合的物种具有更大的生存优势；（3）土壤有机质含量、冠层开阔度、植株密度、平均胸径、土壤含水量、总氮和有效钾可以用来预测森林群落生态对策的变化。研究结果对拓展森林生态系统功能研究具有重要意义。