Population and community consequences of cross-ecosystem resource subsidies

跨生态系统资源补贴对人口和社区的影响

• 批准号: 194708-2013
• 负责人: Richardson, John
• 金额: $ 2.4万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=593724
• 关键词: Population; community; consequences; cross; ecosystem

Many ecosystems depend on cross-ecosystem resource subsidies, such as leaf litter or terrestrial invertebrates falling into streams, as key energy resources to sustain their productivity and biodiversity. This dependence is particularly clear for ecosystems that are detritus-based, but include many other resource types and ecosystem types. Resource subsidies cross many ecosystem boundaries, but are most obvious across the land-water interface. These resources are considered to be subsidies to the in situ production of basal resources, and are characterised in part by being donor-controlled since consumers cannot affect the rates of input of the subsidy resource, and therefore there is no, or negligible, direct feedback. It has been demonstrated that these resources are essential, and work on the topic within the past 5 years have allowed theory to advance to the stage of predictive, quantitative models. We have made progress on flows of these subsidy resources into and out of streams by quantifying the relative effects on consumer populations and their communities. We are now able to ask more specific questions about the quantitative form of the relationships between these subsidy resources and the consumers' dynamics. Moreover, we can ask how resource subsidies affect community processes, including questions about stability, community assembly, productivity, and invasibility.

许多生态系统依赖于跨生态系统的资源补贴，如落叶或落入溪流的陆地无脊椎动物，作为维持其生产力和生物多样性的关键能源。这种依赖性对于以碎屑为基础但又包括许多其他资源类型和生态系统类型的生态系统尤其明显。资源补贴跨越许多生态系统的界限，但在陆地-水界面最为明显。这些资源被认为是对基础资源就地生产的补贴，其部分特征是由捐助者控制，因为消费者不能影响补贴资源的投入率，因此没有直接反馈或直接反馈可以忽略不计。事实证明，这些资源是必不可少的，在过去5年中，关于这一主题的工作使理论发展到了预测性、定量模型的阶段。我们通过量化对消费者群体及其社区的相对影响，在这些补贴资源流入和流出流方面取得了进展。我们现在能够就这些补贴资源与消费者动态之间关系的定量形式提出更具体的问题。此外，我们可以问资源补贴如何影响社区进程，包括关于稳定性，社区集会，生产力和入侵性的问题。