石门国家森林公园唐鱼生境特征分析

Analysis of habitat characteristics of Tanichthys albonubes in Shimen National Forest Park

2009年4月至2010年3月期间,对石门国家森林公园内唐鱼(Tanichthys albonubes)的生境进行了实地调查,并对其栖息地进行分析。结果表明唐鱼的栖息河流类型可分为泥沙溪流型、U型河流和平底型溪流3类,且唐鱼对其栖息地的质量要求较高。通过主成分分析发现,海拔、水宽、流速和人为干扰强度构成了唐鱼生境的主要因子,其中流速和人为干扰能单独对生境选择产生影响,而水深和溪流底质对唐鱼的生境选择影响不大。

To understand habitat characteristics of Tanichthys albonubes, a field survey was carried out on the habitat of T. albonubes in Shimen National Forest Park from April 2009 to March 2010. The results showed that there were three type of habitat of T. albonubes, the U-type river, mud-sand-bottom stream and sand-stone-bottom stream. It was found via PCA （principal component analysis） that altitude, river depth, velocity and human disturbance intensity were the main factors in the formation of habitats. In addition, velocity and human disturbance had an independent effect upon habitat selection. However. fiver depth and bottom composition had no obvious effect.