Previous work suggests that ecohydraulics should consider the broad range of parameters that characterize turbulent flow combining intensity, periodicity, orientation and scale (IPOS; Lacey, Neary, Liao, Enders, & Tritico, 2012), but ecohydraulics research under field conditions in natural river systems remains rare, largely due to practical constraints. A novel combination of turbulence properties, computed from high‐frequency velocity time series, and underwater video of fish habitat use are presented here for two submerged large wood patches on a side channel of the Tagliamento River, Italy, providing insights into ecohydraulic interactions and the first known field application of the IPOS framework. Two adjacent wood patches of similar size reveal distinct differences in turbulence properties and fish habitat use, emphasizing the importance of considering the diverse properties of turbulent flow and reflecting the role of wood structural properties and position in determining the exact nature of hydraulic habitat. Key gradients in turbulence properties derived from multivariate analysis broadly align with IPOS categories, providing statistical validation for the IPOS framework. The application of IPOS to a habitat‐focused study demonstrates its utility in understanding and deriving key trends from large and complex turbulence data sets. The results also provide a preliminary indication that IPOS‐derived gradients may be helpful in explaining fish habitat selection, but these findings need further validation through high spatial resolution studies with different species and bioenergetics models. These insights support previous calls for inclusion of diverse turbulence parameters in ecohydraulics research and, where possible, more explicit consideration of turbulence properties in river assessment, conservation and restoration.

中文翻译：

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湍流，木材和鱼类的下游：田间条件下的生态液压相互作用

先前的工作表明，生态液压技术应考虑强度，周期性，方向和规模相结合的表征湍流的广泛参数（IPOS； Lacey，Neary，Liao，Enders和Tritico，2012），但是在自然条件下对天然河流进行生态液压研究系统仍然很少见，主要是由于实际限制。本文介绍了通过高频速度时间序列计算出来的湍流特性和鱼类栖息地使用的水下视频的新颖组合，在意大利塔利亚门托河旁河道上的两个淹没的大型木片上，提供了对生态水力相互作用及其影响的见解。 IPOS框架的第一个已知的现场应用程序。两个相邻的相似大小的木片揭示了湍流特性和鱼类栖息地使用的明显差异，强调了考虑湍流的各种特性的重要性，并反映了木材结构特性和位置在确定水生生境的确切性质方面的作用。由多变量分析得出的湍流特性的关键梯度大致与IPOS类别保持一致，从而为IPOS框架提供了统计验证。IPOS在以栖息地为重点的研究中的应用证明了它在理解和从大型和复杂的湍流数据集中得出关键趋势方面的效用。结果还初步表明，IPOS梯度可能有助于解释鱼的生境选择，但是这些发现需要通过对不同物种和生物能模型进行高空间分辨率研究来进一步验证。