How High Nature Value (HNV) farmland is related to bird diversity in agro-ecosystems – Towards a versatile tool for biodiversity monitoring and conservation planning
How High Nature Value (HNV) farmland is related to bird diversity in agro-ecosystems – Towards a versatile tool for biodiversity monitoring and conservation planning
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DOI：
10.1016/j.agee.2014.04.012
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发表时间：
2014-09
期刊：
影响因子：
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通讯作者：
B. Aue;T. Diekötter;T. Gottschalk;V. Wolters;S. Hotes
中科院分区：
文献类型：
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作者：
B. Aue;T. Diekötter;T. Gottschalk;V. Wolters;S. Hotes
在欧洲联盟内部，已经制定了“高自然价值农田”指标的国家方法，以了解农业景观维持生物多样性的潜力。我们评估了鸟类物种丰度、丰富度和群落组成，特别是特殊物种，如何与德国HNV农田指数作为一个基于区域的集合，及其特定组成部分（半自然景观元素和代表性样地绘制的具有特征植物物种的农业斑块）相关联。综合HNV指数得分仅与一般鸟类呈微弱正相关，而专业鸟类与湿草地和开阔农田的HNV农田特征呈显著正相关。鸟类群落分析揭示了三组具有特定景观类型代表性的HNV农田特征：(1)具有树篱或小林地等垂直木本结构的复杂景观；(2)湿草地；(3)低利用强度的开放农用地。然而，大部分无法解释的差异表明，在没有考虑景观背景的情况下记录的小规模HNV农田特征可能没有完全捕捉到农业景观中鸟类多样性的所有重要驱动因素。为了更好地反映栖息地需求，特别是对特殊鸟类物种的需求，我们建议在景观背景下调查HNV农田，并计算高度结构化、湿地主导和低土地利用强度的开放景观的景观特定得分。与综合指标相比，小规模高海拔耕地调查数据将更有效地包含其针对特定景观类型及其相关鸟类制定保护计划的潜力。
Within the European Union, national approaches of a ‘High Nature Value (HNV) farmland’ indicator have been developed to inform about the potential of agricultural landscapes to maintain biodiversity. We assessed how bird species abundance, richness and community composition, particularly of specialist species, were associated with the German HNV farmland indicator as an area-based aggregate and with its particular components which were semi-natural landscape elements and agricultural patches with characteristic plant species mapped in representative sample plots.The aggregated HNV indicator score showed a weak but positive relationship with generalist bird species only, while specialist species were associated with individual HNV farmland features characterizing wet grasslands and open farmland. Bird community analysis revealed three groups of HNV farmland features representative of particular landscape types: (1) complex landscapes with vertical woody structures such as hedgerows or small woodlands, (2) wet grasslands and (3) open agricultural land of low land-use intensity. Large portions of unexplained variance, however, indicated that the small-scaled HNV farmland features recorded without considering the landscape context may not have fully captured all important drivers of bird diversity in agricultural landscapes.To achieve a better representation of habitat requirements particularly of specialist bird species we propose surveying HNV farmland in a landscape context and calculating landscape-specific scores for highly structured, wetland-dominated and open landscapes of low land-use intensity. As compared to the aggregated indicator, the small-scale HNV farmland survey data would more efficiently enfold its potential for tailoring conservation schemes specifically to a given landscape type and its associated bird species.