Increasing land-use intensity decreases floral colour diversity of plant communities in temperate grasslands
Increasing land-use intensity decreases floral colour diversity of plant communities in temperate grasslands
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DOI：
10.1007/s00442-013-2627-6
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发表时间：
2013-10-01
期刊：
影响因子：
2.7
通讯作者：
Schaefer, H. Martin
中科院分区：
文献类型：
--
作者：
Binkenstein, Julia;Renoult, Julien P.;Schaefer, H. Martin
为了在全球变化的世界中保护生物多样性和生态系统功能，了解土地利用对授粉等生态系统过程的影响至关重要。花的颜色被认为是植物与传粉者相互作用的中心。到目前为止，它仍然是未知的土地利用是否影响显花植物群落的颜色。为了评估土地利用对温带草原花色多样性和组成的影响，我们收集了两个德国地区Schwabische Alb（SA）和Hainich-Dun（HD）的69个植物群落的开花植物物种，开花覆盖和花反射光谱的数量数据。我们分析了反射率数据的花的颜色，因为它们被蜜蜂和研究的基础上，每个开花植物物种的光谱位点在麦克斯韦三角形的花的颜色多样性。在第一次割草，花色多样性下降，随着土地利用强度在SA，伴随着一个移动的平均花的颜色的社区对增加比例的白色开花覆盖在这两个地区。通过改变草地的颜色特征，我们认为，增加土地利用强度可以影响花游客动物群的游客行为和多样性。这些变化反过来又可能影响草原植物群落的植物繁殖。我们的研究结果表明，土地利用可能会影响植物和花游客之间的通信过程，通过改变花色性状。
To preserve biodiversity and ecosystem functions in a globally changing world it is crucial to understand the effect of land use on ecosystem processes such as pollination. Floral colouration is known to be central in plant-pollinator interactions. To date, it is still unknown whether land use affects the colouration of flowering plant communities. To assess the effect of land use on the diversity and composition of flower colours in temperate grasslands, we collected data on the number of flowering plant species, blossom cover and flower reflectance spectra from 69 plant communities in two German regions, Schwabische Alb (SA) and Hainich-Dun (HD). We analysed reflectance data of flower colours as they are perceived by honeybees and studied floral colour diversity based upon spectral loci of each flowering plant species in the Maxwell triangle. Before the first mowing, flower colour diversity decreased with increasing land-use intensity in SA, accompanied by a shift of mean flower colours of communities towards an increasing proportion of white blossom cover in both regions. By changing colour characteristics of grasslands, we suggest that increasing land-use intensity can affect the flower visitor fauna in terms of visitor behaviour and diversity. These changes may in turn influence plant reproduction in grassland plant communities. Our results indicate that land use is likely to affect communication processes between plants and flower visitors by altering flower colour traits.