文章基本信息

标题：Simulations of spawning habitats for brown trout in an Alpine river reach using a two-stage multivariate fuzzy-logical approach
本地全文：下载
作者：Markus Noack ; Johannes Ortlepp ; Silke Wieprecht 等
期刊名称：eco.mont - Journal on Protected Mountain Areas Research and Management
印刷版ISSN：2073-106X
电子版ISSN：2073-1558
出版年度：2015
卷号：7
期号：2
页码：41-49
DOI：10.1553/eco.mont-7-2s41
出版社：Austrian Academy of Sciences Press
摘要：The availability of suitable spawning habitats for gravel-spawning fish is an important indicator for Alpine river reaches regarding hydro- and morphodynamic components of fluvial ecosystems. This paper presents advances in habitat modelling techniques of suitable spawning habitat conditions for brown trout (Salmo trutta) by applying multivariate fuzzy-logical habitat modelling in combination with a three-dimensional numerical sediment-transport model. The fuzzy-logical approach considers multiple particle size classes to evaluate the suitability of sediment characteristics (sediment spawning index, SSI). It is then combined with hydraulic characteristics to compute spawning habitat suitability (HSIspawn). The study site is part of the River Spoel in the Swiss National Park in the Central Alps of Switzerland. The modelling approach was applied to two spawning seasons (2009 and 2010) and provides information about the spatial distribution of suitable spawning habitats. The simulated results indicate a good model performance when comparing the simulation results with observed spawning redds. The predictability of the modelling approach allows further investigations into new management scenarios to improve the hydro- and morphodynamic situation in the River Spoel and to increase the availability of suitable spawning habitats for brown trout.
关键词：fuzzy logic; habitat modelling; spawning habitat; brown trout; Alpine rivers