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首页> 外文期刊>European journal of wildlife research >Spring density and summer habitat use of alpine rock ptarmigan Lagopus muta helvetica in the southeastern Alps
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Spring density and summer habitat use of alpine rock ptarmigan Lagopus muta helvetica in the southeastern Alps

机译：阿尔卑斯山东南部高山石雷鸟Lagopus muta helvetica的春季密度和夏季栖息地利用

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In the Alps tourism, land-use practices and climate change may cause a loss of suitable habitat of rock ptarmigan (Lagopus muta helvetica). Hence, there is a need for basic research on population densities and habitat requirements of this species as abasis for long-term monitoring studies. So far, in the Austrian Alps, no accurate data on densities and trends of rock ptarmigan populations are available. We carried out counts of calling cocks in the southeastern part of the Austrian Alps (Nockberge National Park, Carinthia, Austria) between 31 May and 1 July 2003 and evaluated the distribution of male rock ptarmigan territories. The spring density of 5.4 territorial cocks per square kilometre was similar to densities in the Swiss Alps but higher than spring population densities in the Italian Alps and the Pyrenees. To investigate summer habitat use, we established a grid mapping of habitat parameters and rock ptarmigan signs. In total, 38 squares with signs of rock ptarmigan presence were recorded(i.e. 32% of all recorded squares). The presence of rock ptarmigan was significantly correlated with cover of rock and rock ptarmigan preferred habitat patchiness. Our study provides a useful reference for future monitoring of this species in the alpinedistribution range considering the potential decrease and fragmentation of alpine habitats resulting from climate change and human impacts.
机译：在阿尔卑斯山的旅游业中，土地利用方式和气候变化可能会造成雷鸟雷鸟（Lagopus muta helvetica）的适当栖息地丧失。因此，需要对该种群的密度和栖息地要求进行基础研究，作为长期监测研究的基础。迄今为止，在奥地利阿尔卑斯山，尚无关于雷鸟雷鸟种群密度和趋势的准确数据。在2003年5月31日至7月1日期间，我们对奥地利阿尔卑斯山东南部（奥地利克恩顿州的诺克伯格国家公园）的calling鸟进行了计数，并评估了雄性雷鸟雷鸟的分布。每平方公里5.4属公鸡的春季密度与瑞士阿尔卑斯山的密度相似，但高于意大利阿尔卑斯山和比利牛斯山脉的春季人口密度。为了调查夏季栖息地的使用情况，我们建立了栖息地参数和雷鸟岩石标志的网格映射。总共记录了38个有岩石雷鸟存在迹象的正方形（即所有记录正方形的32％）。雷鸟岩石的存在与岩石的覆盖和雷鸟喜欢的栖息地斑块显着相关。考虑到由于气候变化和人类影响而导致的高山生境的潜在减少和破碎化，我们的研究为将来对该物种在高山分布范围内的监测提供了有用的参考。

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