The bumblebees of the Gesäuse National Park and the Admont Basin

In the area of the Gesäuse National Park and the Admont Basin, 25 species of bumblebee have been detected so far, 19 of them within the borders of the National Park. 22 of them were confirmed in this investigation in 2008. The biotopes with the highest attractiveness for bumblebees were high-water floodplains, followed by alpine pastures on limestone and forest edges. The species of bumblebee recorded in altitude transects differed in their height and biotope preferences as well as in their phenology and their trunk length. This strong niche differentiation enables the existence of species-rich bumblebee communities. Bumblebees play a prominent role in mountain areas as pollinators and visited more than 25 % of the total entomophile flora found on the transects with 101 plant species.在格萨乌斯（Gesäuse）国家公园与阿德蒙特（Admont）盆地范围内，迄今已记录到25种熊蜂（bumblebee），其中19种分布于该国家公园境内。2008年开展的本次调查共确认其中22个物种。对熊蜂吸引力最高的生物生境（biotope）为高水位泛滥平原，其次为石灰岩阿尔卑斯牧场与林缘地带。在海拔样带（altitude transects）中记录到的熊蜂物种，在海拔偏好、生境选择、物候（phenology）特征以及吻长方面均存在差异。这种显著的生态位分化使得物种丰富的熊蜂群落得以存续。熊蜂作为传粉者在山地生态系统中发挥着关键作用，在本次样带调查记录的101种虫媒植物中，熊蜂造访了其中25%以上的种类。