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历史上的花评估揭示了英国的花资源的下降和增加

Mathilde Baude^1,2, William E Kunin³, Nigel D Boatman⁴

¹School of Biological Sciences, University of Bristol, Life Sciences Building, Bristol BS8 1TQ, UK.

|February 5, 2016

概括

昆虫授粉者减少与花资源的减少有关. 虽然近期蜜汁供应稳定并增加,但蜜汁来源的多样性却有所下降,影响着授粉者健康和保护工作.

科学领域:

生态学
保护生物学
农业科学

背景情况:

昆虫授粉群体面临着衰退, 引起了农作物和野花授粉的担忧.
由于息地丧失而减少的花资源被认为是关键因素,但缺乏历史数据.
对植物资源的定量评估对于了解授粉者种群动态至关重要.

研究的目的:

通过结合植被调查和花测量来估计全国范围的花奖励.
分析英国花蜜供应和多样性的历史变化.
确定可以增强授粉者的花蜜资源的息地和管理策略.

主要方法:

使用国家植被调查和直接花测量来估计花奖励.
分析了从20世纪30年代到2007年的花蜜供应和多样性的时间趋势.
在不同息地类型,包括草原和耕地中比较花蜜供应和多样性.

主要成果:

在英格兰和威尔士,在20世纪30年代到70年代间,花蜜资源出现了大量的损失.
英国的花蜜供应总量在1978年稳定,从1998年到2007年增加.
蜜汁来源的多样性下降,到2007年,只有四种植物占主导地位. 石灰质草原,宽叶森林和中性草原是丰富的生态环境,而耕地是贫穷的.

结论:

植物资源的可用性一直在波动,最近的花蜜供应稳定和增加.
蜜汁来源的减少对传粉者健康和生态系统的稳定性构成风险.
有针对性的草原管理和农业环境计划可以显著改善国家花蜜供应并支持授粉者保护.

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