Effects of land-use and agricultural management on birds of marginal farmland: a case study in the Llŷn peninsula, Wales
Effects of land-use and agricultural management on birds of marginal farmland: a case study in the Llŷn peninsula, Wales
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土地利用和农业管理对边际农田鸟类的影响：威尔士 Llŷn 半岛的案例研究
DOI：
10.1016/j.agee.2004.12.006
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
P. Dolman
中科院分区：
文献类型：
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作者：
S. P. Woodhouse;J. Good;A. Lovett;R. Fuller;P. Dolman
广泛的牧场和边际土地对许多受保护的鸟类物种来说是重要的。这项研究确定了与威尔士LLŷn半岛边缘高地栖息地相关的鸟类物种，并讨论了进一步的土地利用变化对这些物种的影响。2000年5月至7月期间，对45个地点进行了鸟类和栖息地调查。记录了在每个地点观察到的鸟类种类以及边际农田特有的8种鸟类的密度。这些地点被划分为代表不同管理强度和土地利用选择的土地管理类别。使用二元相似性指数来量化与每个类别的物种关联，并使用典型对应分析(CCA)来确定与个体栖息地特征的关联。栖息地的差异很大程度上归因于管理上的差异。在集约化管理的场地上记录的物种很少，尽管家燕Martin Delichon urbica和燕子Hirundo rustica与灌木或蕨类改良草地显著相关。被遗弃或管理不善的地点树木密度高，蕨类植物覆盖率高，并支持许多常见的灌木或林地物种。广泛管理的未改良草地、灌木石南、蕨类和灌木(FFridd)对几个物种来说是重要的，包括果梨、小麦Oenanthe Oenanthe、画眉鸟Turdus visciorus、石鸡Saxicola toquata和草甸画眉Anpus pratensis。在改良草地和黑猩猩的草地上，黄粉虫和麻黄鱼的密度较高。这项研究强调了边际农田上栖息地多样化的必要性，最有可能通过农业环境和农村发展措施向边际地区分配资金来实现这一点。
Extensive pastoral farming and marginal land are important for many bird species of conservation concern. This study identified the bird species associated with a range of marginal upland habitats in the Llŷn peninsula in Wales and discusses the impact on these species of further land-use change. Bird and habitat surveys of 45 sites were conducted between May and July 2000. The bird species observed at each site were recorded along with the densities of eight species characteristic of marginal farmland. Sites were assigned to land management categories representing different management intensity and land-use options. A binary similarity index was used to quantify species associations with each of these categories and canonical correspondence analysis (CCA) was used to identify associations with individual habitat characteristics. Habitat differences were largely attributable to differences in management. Very few species were recorded on intensively managed sites, although house martin Delichon urbica and swallow Hirundo rustica were significantly associated with improved grassland with scrub or bracken. Sites that were abandoned or under-managed had a high tree density, high cover of bracken Pteridium aquilinium and supported many common scrub or woodland species. Extensively managed sites with unimproved grassland, shrub heath, bracken and scrub (ffridd) were found to be important for several species, including chough Pyrrhocorax pyrrhocorax, wheatear Oenanthe oenanthe, mistle thrush Turdus viscivorus, stonechat Saxicola toquata and meadow pipit Anthus pratensis. High densities of yellowhammer Emberiza citrinella and linnet Carduelis cannabina occurred on sites with improved grassland and gorse Ulex europaeus. This study highlights the need for a diversity of habitats on marginal farmland, which is most likely to be achieved through the distribution of funds to marginal areas through agri-environment and rural development measures.