Theoretical and experimental integration of biogeography and ecosystem ecology

生物地理学和生态系统生态学的理论与实验整合

• 批准号: 386685-2012
• 负责人: Gravel, Dominique
• 金额: $ 2.4万
• 依托单位: Université du Québec à Rimouski
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=529014
• 关键词: Theoretical; experimental; integration; biogeography; ecosystem

The long-term objective of my research program is to integrate the disciplines of biogeography and biodiversity-ecosystem functioning into a coherent theoretical framework to better understand the global change impacts on ecosystems. There has been impressive progress in biogeography over the last fifteen years to predict the impact of global changes on range shifts, extinction risks and the future distribution of biodiversity. These studies however ignore the impacts of biotic interactions, and consequently how to scale from populations to ecosystems. This synthesis will contribute answering where, when and why changes in biodiversity will occur and what are the impacts of those changes on the provision of ecosystem services. I will build upon my previous work on trophic metacommunities and on the biodiversity-relationship to develop new models and conduct empirical investigations of their predictions. The central hypothesis of this research project is that the structure of ecological networks of interactions determines ecosystem functioning. I this predict that communities could stand considerable species turnover following global changes, but the functioning will be preserved if the structure of interactions is maintained. I will combine mathematical models and the pitcher plant microbial food web as a model experimental system to fulfill the following specific objectives: i) develop a model integrating elements of biogeography, community and ecosystem ecology to better predict the impacts of global changes on community structure and ecosystem functioning; ii) study the spatial structure of complex ecological networks in a heterogeneous environment, iii) to understand how this structure affects functioning and iv) how this spatial heterogeneity could provide an evolutionary insurance in changing environments. The stimulating combination of empirical and theoretical approaches defining this research program is a strong asset to improve our understanding of the global change impacts on key ecosystem services.

我的研究计划的长期目标是将地理学和生物多样性生态系统功能的学科整合到一个连贯的理论框架中，以更好地了解全球变化对生态系统的影响。在过去的15年里，在预测全球变化对范围转移、灭绝风险和生物多样性未来分布的影响方面，地理学取得了令人印象深刻的进展。然而，这些研究忽略了生物相互作用的影响，以及如何从种群扩展到生态系统。这一综述将有助于回答生物多样性变化将在何处、何时和为何发生，以及这些变化对生态系统服务的提供有何影响。我将建立在我以前的工作上的营养代谢和生物多样性的关系，开发新的模型，并进行实证调查，他们的预测。该研究项目的中心假设是，相互作用的生态网络的结构决定生态系统的功能。我预测，在全球变化之后，群落可以承受相当大的物种更替，但如果维持相互作用的结构，功能将得以保留。本人将联合收割机结合数学模型和猪笼草微生物食物网作为一个模型实验系统，以实现以下具体目标：i）建立一个整合地理学、群落学和生态系统生态学元素的模型，以更好地预测全球变化对群落结构和生态系统功能的影响;研究异质环境中复杂生态网络的空间结构，iii）了解这种结构如何影响功能; iv）这种空间异质性如何在不断变化的环境中提供进化保障。定义这一研究计划的经验和理论方法的刺激组合是一个强大的资产，以提高我们对全球变化对关键生态系统服务的影响的理解。