Development of a Plant Functional Group Classification to Support the Application of State-and-Transition

开发植物功能组分类以支持状态和转换的应用

• 批准号: 168592478
• 负责人: Dr. Anne Zemmrich
• 金额: --
• 依托单位: Department of Ecosystem Sciences and Management
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/168592478?language=en
• 关键词: Development; Plant; Functional; Group; Classification

In the adoption of the non-equilibrium paradigm within ecology a conceptual framework of state-and-transition models, thresholds and resilience for vegetation dynamics was developed. It was proposed as an alternative procedure especially for rangeland assessment to cover the entire spectrum of possible vegetation dynamics including discontinuous and non-reversible vegetation change, the importance of highly variable climate and natural disturbances, and multidirectional vegetation responses to natural and anthropogenic impacts. Conceptual state-and-transition models describe alternative vegetation states for individual ecological sites which are separated by thresholds and transition probabilities between these states. Plant functional types represent non-phylogenetic classifications grouping plant species according their response to environmental factors including disturbance. Requested research aims to categorize plant species from rangeland ecosystems of the West of the USA into meaningful plant functional types and to examine their integration into state-and-transition models as a tool for prediction and governance vegetation dynamics. Therefore a meta-analysis shall be conducted to classify rangeland species into functional types according their response to disturbance, and to provide an overview on the impact of these functional response types on ecosystem properties. The validity of the results will be tested against long-term data within state-and-transition models. Finally, derived plant functional types will be integrated in quantitative state-and-transition models.

在采用生态学中的非平衡范式时，开发了植被动态的状态和过渡模型、阈值和恢复力的概念框架。该方法被建议作为一种替代方法，特别是用于牧场评估，以涵盖可能的植被动态的整个频谱，包括不连续和不可逆的植被变化，高度可变的气候和自然干扰的重要性，以及植被对自然和人为影响的多向响应。概念状态和过渡模型描述了单个生态点的备选植被状态，这些状态由阈值和这些状态之间的过渡概率分开。植物功能类型是根据植物对环境因子（包括干扰）的响应对植物进行的非系统发育分类。申请的研究旨在将美国西部牧场生态系统中的植物物种分类为有意义的植物功能类型，并研究它们与状态和过渡模型的整合，作为预测和治理植被动态的工具。因此，需要进行meta分析，将草地物种根据其对干扰的响应划分为功能类型，并概述这些功能响应类型对生态系统特性的影响。结果的有效性将根据状态和转换模型中的长期数据进行测试。最后，衍生的植物功能类型将整合到定量的状态和转换模型中。