Mechanistic, individual-based simulation models have been used for >25 years to overcome well-known limitations of “habitat suitability” models. InSTREAM 7 is the latest of our individual-based models for predicting the effects of flow and temperature regimes on stream salmonid populations. Unlike PHABSIM (or other methods based on habitat “quality,” e.g., as net rate of energy intake), inSTREAM mechanistically represents specific effects of flow and temperature on all life stages, and how those effects combine into testable predictions of population measures such as abundance, relative abundance of multiple trout species, and persistence. InSTREAM 7 is the first version to also represent the daily light cycle (dawn, day, dusk, and night) and how feeding, predation risk, and individual behavior vary among light phases. An example assessment illustrates the importance of inSTREAM's multiple mechanisms: predicted trout population response to flow and temperature regimes depended on the effects of sub-lethal temperatures on feeding behavior and effects of temperature on egg survival and development, as well as how depth and velocity affected growth and predation risk. While its input data requirements are comparable to PHABSIM's, inSTREAM provides a more comprehensive framework for thinking about and predicting specific, well-known effects of flow and temperature. It has also proven useful for designing and evaluating restoration projects and for prioritizing alternative management actions. InSTREAM 7 is free, open-source, completely updated with recent literature, and implemented in the popular NetLogo software platform that makes customization easy.

中文翻译：

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InSTREAM 7：河流鳟鱼的河道流量评估和管理模型

机械的、基于个体的模拟模型已经使用了超过 25 年，以克服众所周知的“栖息地适宜性”模型的局限性。InSTREAM 7 是我们最新的基于个体的模型，用于预测流量和温度状况对河流鲑鱼种群的影响。与 PHABSIM（或其他基于栖息地“质量”的方法，例如，作为能量摄入的净速率）不同，inSTREAM 机械地表示流量和温度对所有生命阶段的特定影响，以及这些影响如何结合到人口测量的可测试预测中，例如丰度、多种鳟鱼物种的相对丰度和持久性。InSTREAM 7 是第一个也代表每日光照周期（黎明、白天、黄昏和夜晚）以及进食、捕食风险和个体行为在光照阶段之间如何变化的版本。一个评估示例说明了 inSTREAM 多种机制的重要性：预测的鳟鱼种群对流量和温度状况的反应取决于亚致死温度对摄食行为的影响和温度对蛋存活和发育的影响，以及深度和速度如何影响生长和捕食风险。虽然其输入数据要求与 PHABSIM 相当，但 inSTREAM 提供了一个更全面的框架，用于思考和预测特定的、众所周知的流量和温度影响。事实证明，它还有助于设计和评估恢复项目以及确定替代管理行动的优先级。InSTREAM 7 是免费的、开源的，完全更新了最新的文献，并在流行的 NetLogo 软件平台中实现，使定制变得容易。