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首页> 外文期刊>Biological Conservation >To mow or to mow less: Lawn mowing frequency affects bee abundance and diversity in suburban yards
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To mow or to mow less: Lawn mowing frequency affects bee abundance and diversity in suburban yards

机译：割草或割草：草坪割草频率影响郊区院子里的丰富和多样性

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摘要

Green spaces embedded within the urban matrix, particularly residential yards, could mitigate negative aspects of urban development and provide pollinator habitat. Lawns represent a dominant green space, and their management consists of frequent mowing to inhibit the growth of ostensibly "weedy" species (e.g., dandelions and clover). Since widespread population declines of bees and other pollinators from habitat loss are a growing concern, these spontaneous flowers could provide pollen and nectar sources throughout the growing season. We experimentally tested whether different lawn mowing frequencies (1, 2 or 3 weeks) influenced bee abundance and diversity in 16 suburban western Massachusetts yards by increasing lawn floral resources. Lawns mowed every three weeks had as much as 2.5 times more lawn flowers than the other frequencies. Interestingly, lawns mowed every two weeks supported the highest bee abundance yet the lowest bee richness and evenness. We suggest these patterns were driven by a combination of more abundant floral resources (compared with 1-week yards), easier access to lawn flowers due to shorter grass and a more drastic impact on grass biomass and floral resources (compared with 3-week yards), and the dominance of a few generalist bees overwhelming our samples, thus driving richness and evenness. Our results highlight a "lazy lawnmower" approach to providing bee habitat. Mowing less frequently is practical, economical, and a timesaving alternative to lawn replacement or even planting pollinator gardens. Given the pervasiveness of lawns coupled with habitat loss, our findings provide immediate solutions for individual households to contribute to urban conservation.
机译：嵌入城市矩阵内的绿地，尤其是住宅码，可以减轻城市发展的负面方面，并提供垃圾植物栖息地。草坪代表着占主导地位的绿地，他们的管理层常意割草，以抑制表面上“杂草”种的增长（例如，蒲公英和三叶草）。由于蜜蜂的普遍存在百叶草和其他肺法化人的下降损失是一个日益令人担忧的问题，因此这些自发的花卉可以在整个生长季节提供花粉和花蜜来源。我们通过增加草坪花卉资源，通过增加草地马萨诸塞州的16个郊区的大量和多样性的不同草坪割频率（1,2或3周）。草坪每三个星期割草每三个星期就越多达2.5倍的草坪花比其他频率。有趣的是，草坪每两周割下一两周，支持最高的蜜蜂丰富，但蜜蜂丰富的最低和均匀性。我们建议这些模式由更丰富的花卉资源（与1周码相比）的组合驱动，由于草草较短，对草生物量和花卉资源的影响更大，对草坪花更容易进入草坪花卉（与3周的花园相比），少数一般主义者蜜蜂的优势压倒了我们的样品，从而推动丰富性和均匀性。我们的结果突出了一个“懒人割草机”，提供蜂栖息地的方法。割草的折磨较不经常是实际，经济的，以及草坪替代品甚至种植花粉花园的令人惊叹的替代品。鉴于草坪与栖息地损失的普及，我们的调查结果为个人家庭提供了直接解决方案，以促进城市保护。

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