Species redundancy in response to multiple disturbances

应对多重干扰的物种冗余

• 批准号: DP190102837
• 负责人: A/Prof Leon Barmuta
• 金额: $ 16.94万
• 依托单位: University of Tasmania
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2019
• 资助国家: 澳大利亚
• 起止时间: 2019-07-10 至 2024-10-31
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP190102837
• 关键词: Species; redundancy; response; multiple; disturbances

This project aims to elucidate how the context within which disturbances occur affects food web linkages and how these map to responses in ecosystem function. There is a critical need to test the common assumption in environmental management that high biodiversity makes ecosystems resilient to disturbances. Studies that merely observe biodiversity change after disturbance cannot identify ecological processes connecting high diversity and ecosystem function, making experiments that manipulate identical disturbances in ecosystems with different biodiversity essential. This project will use field experiments that manipulate disturbances in streams replicated in low and high biodiversity regions and across gradients of chronic background stress to show how biodiversity sustains functional ecosystems, and how much diversity can be lost before ecosystems collapse.

该项目旨在阐明干扰发生的环境如何影响食物网的联系，以及这些影响如何映射到生态系统功能的响应。迫切需要检验环境管理中的普遍假设，即高生物多样性使生态系统能够抵御干扰。仅观察干扰后生物多样性变化的研究无法识别高多样性与生态系统功能之间的生态过程，因此在不同生物多样性的生态系统中进行相同干扰的实验至关重要。该项目将使用现场实验，在生物多样性低和高的地区以及跨慢性背景压力梯度的河流中复制操纵干扰，以显示生物多样性如何维持功能性生态系统，以及在生态系统崩溃之前可以失去多少多样性。