Effects of grazing intensity on bird assemblages and populations of Hungarian grasslands
Effects of grazing intensity on bird assemblages and populations of Hungarian grasslands
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DOI：
10.1016/j.agee.2005.02.006
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发表时间：
2005-06-30
影响因子：
6.6
通讯作者：
Erdós, S
中科院分区：
文献类型：
--
作者：
Báldi, A;Batáry, P;Erdós, S
农业集约化是导致欧洲联盟（欧盟）农田鸟类数量急剧下降的原因。八个中欧和东欧国家加入欧盟将重组那里的农业。主要威胁之一是农田管理的强化。如果加强农业，农业环境计划能否平衡中东欧国家鸟类群落的预期下降？我们研究了这个问题，通过比较鸟类组合的42广泛和密集放牧配对领域在匈牙利的三个地区（碱性草原和草甸在匈牙利中部和碱性草原在匈牙利东部）。鸟类组合在不同地区和放牧强度之间差异显着。放牧强度较大的草地物种数量和多样性较高，但密度较低。这可能是密集地点景观多样性较高的结果，其中包括农场建筑物、避难所、威尔斯和其他结构。几种鸟类，主要是欧洲保护的关注，表现出对比鲜明的反应，放牧强度在三个地区，包括关键的草地物种（黑尾godwit Limosa limosa，红脚鹬totanus，云雀Alauda arvensis和玉米bunting Emberiza calandra）。因此，草地特征的威胁性和敏感性是相关的。虽然许多西欧的衰落物种仍然丰富的匈牙利草原，我们的研究结果项目的威胁，预期的加剧。这项研究表明，它是不可能提供一个通用的草地管理计划，将有利于所有鸟类在匈牙利的所有地区。在融入欧盟和调整农业结构的过程中，迫切需要建立科学合理的计划。(c)2005 Elsevier B.V.保留所有权利。
Agricultural intensification is responsible for the dramatic decline of farmland bird populations in the European Union (EU). The joining of eight Central and Eastern European (CEE) countries to the EU will re-structure agriculture there. One of the main threats is the intensification of farmland management. Can agri-environmental programs balance the expected decline in bird assemblages of the CEE countries if farming will be intensified? We studied this question by comparing bird assemblages of 42 extensively and intensively grazed paired fields in three regions of Hungary (alkali steppes and meadows in Central Hungary and alkali steppes in Eastern Hungary). Bird assemblages varied significantly across regions and grazing intensity. Intensively grazed sites showed a higher species number and diversity, but lower densities than the extensive sites. This is probably the consequence of higher landscape diversity of intensive sites, which included farm buildings, shelters, wells and other structures. Several bird species, mainly with European conservation concern, showed contrasting responses to grazing intensity in the three regions, including key grassland species (black-tailed godwit Limosa limosa, redshank Tringa totanus, skylark Alauda arvensis and corn bunting Emberiza calandra). Therefore, threat and sensitivity to grassland characteristics are correlating. Although many of the declining species of Western Europe are still abundant in Hungarian grasslands, our results project the threat of the expected intensification. This study showed that it is not possible to provide a general grassland management scheme that will favour all bird species in all regions of Hungary. In the process of integrating to the EU and restructuring agriculture, the establishment of scientifically sound schemes is urgent. (c) 2005 Elsevier B.V. All rights reserved.