How does flow regulation affect food web linkages between juvenile and larval fish and aquatic invertebrates in a coastal river?

流量调节如何影响沿海河流中幼鱼和水生无脊椎动物之间的食物网联系？

• 批准号: LP0562434
• 负责人: Prof Andrew Boulton
• 金额: $ 11.21万
• 依托单位: The University of New England
• 依托单位国家: 澳大利亚
• 项目类别: Linkage Projects
• 财政年份: 2006
• 资助国家: 澳大利亚
• 起止时间: 2006-01-09 至 2009-10-15
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/LP0562434
• 关键词: How; does; flow; regulation; affect

River regulation to supply water for human demands has altered flow regimes in many Australian rivers. These changes in flow impact on native invertebrate and fish community composition. Environmental flow allocations seek to alleviate these impacts but managers are hampered by lack of data on the effects of flow on food web linkages, particularly for juvenile and larval fish (JLF). We aim to compare food webs of invertebrates and JLF in six tributaries of the Hunter River, three of which are regulated, to determine how flow regulation changes trophic linkages. A flow release in one tributary will let us test the hypothesis that river regulation restricts food availability to JLF, reducing their viability, growth rates, and abundance.

为满足人类需求而进行的河流管理改变了澳大利亚许多河流的水流状况。这些流量的变化对本地无脊椎动物和鱼类群落组成的影响。 环境流量分配试图减轻这些影响，但管理人员因缺乏关于流量对食物网联系的影响的数据而受到阻碍，特别是对幼鱼和仔鱼（JLF）。 我们的目标是比较食物网的无脊椎动物和JLF在六个支流的猎人河，其中三个调节，以确定流量调节如何改变营养联系。 在一个支流流量释放将让我们测试的假设，河流调节限制食物供应JLF，降低他们的生存能力，生长速度和丰富度。