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首页> 外文学位 >The link between brook trout young-of-year ecology and groundwater hydrology: A topographic index approach (Salvelinus fontinalis).
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The link between brook trout young-of-year ecology and groundwater hydrology: A topographic index approach (Salvelinus fontinalis).

机译：溪鳟年幼生态与地下水水文学之间的联系：一种地形指数法（Salvelinus fontinalis）。

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Lake-dwelling brook trout (Salvelinus fontinalis ) are closely linked to the terrestrial environment surrounding the waters they inhabit through their use of groundwater habitat. A large-scale approach was taken to identify this habitat use by young-of-year (YOY) brook trout across 21 lakes in Algonquin Park, Ontario using a topographic index (TI) approach in a Geographical Information System (GIS). Brook trout YOY habitat use on two small lakes was found to be spatially traditional with high levels of annual (>88%) and seasonal (>60%) reuse. On a larger scale, 231 field-observed habitats were found around the 21 lakes, of which only 74(32%) contained YOY. Preference for small, cold streams was correlated with brook trout YOY presence and linked to the occurrence of groundwater. All but three of the study lakes contained YOY in at least one habitat. The number of YOY habitats around the study lakes was significantly lower than expected given a fractal or geometric relationship between lake surface area and perimeter. The TI approach performed well at identifying potential YOY groundwater habitat, eliminating an average of 92.5% of a lake's shoreline not associated with brook trout habitat. Given that over 60% of the habitats found in the field are omitted from the Ontario Base Map (OBM) system, this technique, when combined with knowledge of the ecology of the brook trout, has many management implications for conserving lake-dwelling brook trout populations.
机译：居住在湖中的河鳟（ Salvelinus fontinalis ）通过使用地下水栖息地与他们所居住的水域周围的陆地环境紧密相连。在地理信息系统（GIS）中使用地形指数（TI）方法，采取了大规模方法来识别年幼（YOY）溪鳟跨越安大略省阿冈昆公园（Algonquin Park）的21个湖泊的栖息地。在两个小湖上，鳟鱼的YOY栖息地利用在空间上是传统的，每年（> 88％）和季节性（> 60％）的再利用水平很高。在更大范围内，在21个湖泊周围发现了231个野外观察到的栖息地，其中只有74（32％）个包含YOY。偏爱小而冷的溪流与溪鳟的年青存在相关，并与地下水的发生有关。除三个研究湖泊外，所有湖泊中至少有一个栖息地的年增长率为。考虑到湖泊表面积与周长之间的分形或几何关系，研究湖泊周围的YOY栖息地数量明显低于预期。 TI的方法在识别潜在的YOY地下水生境方面表现出色，平均消除了与小鳟鱼生境无关的湖岸线的92.5％。鉴于安大略省底图（OBM）系统忽略了田间发现的60％以上的栖息地，因此该技术与小河鳟的生态知识相结合，对于保护湖栖小河鳟具有许多管理意义。人口。

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