THE RELATIONSHIP BETWEEN BIRD DISTRIBUTION AND THE BOTANICAL AND STRUCTURAL CHARACTERISTICS OF HEDGES
THE RELATIONSHIP BETWEEN BIRD DISTRIBUTION AND THE BOTANICAL AND STRUCTURAL CHARACTERISTICS OF HEDGES
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DOI：
10.2307/2404647
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发表时间：
1995-08-01
影响因子：
5.7
通讯作者：
JOHNSON, PJ
中科院分区：
文献类型：
--
作者：
MACDONALD, DW;JOHNSON, PJ
1.我们研究了牛津郡五个农场的植物篱的植物学和结构特征之间的关系，以及与之相关的鸟类种群。多元回归分析表明，对于这个样本，鸟类丰富的树篱往往是高大的，有更多的灌木种类在他们比绿篱，其中很少有鸟类记录。绿篱中鸟类的总密度（单位长度测量）和几个个体物种的密度也与绿篱高度、绿篱中成熟树木的出现率和绿篱附近的花园栖息地存在正相关.绿篱中的空隙的程度对鸟类的总体丰度以及两种常见物种黑鸟和邓诺克的丰度产生了显著的负面影响。这些意见被认为是在保护的实际管理方面;忽视树篱导致的差距和过度管理的形式砍伐的发展，都有可能对当地的许多物种的丰富度产生负面影响。
1. We examine the relationship between the botanical and structural characteristics of the hedgerows of five Oxfordshire farms, and the bird populations associated with them.2. Multiple regression analysis demonstrated that, for this sample, bird-rich hedges tended to be tall and to have more species of shrub growing in them than did hedgerows in which few bird species were recorded.3. The overall density of birds in the hedgerows (measured per unit length), and the density of several individual species, were also positively correlated with hedgerow height, with the rate of occurrence of mature trees in the hedgerows, and with the presence of garden habitat close to the hedgerow.4. The extent of gaps in hedgerows had a significant negative effect on the overall abundance of birds, and on the abundance of two common species, the blackbird and dunnock.5. These observations are considered in terms of practical management for conservation; neglect of hedgerows leading to the development of gaps and excessive management in the form of cutting, are both likely to have a negative effect on the local abundance of many species.