花卉资源属性对城市大黄蜂觅食活动的局部影响

IF 2.4 Q3 ENVIRONMENTAL SCIENCES Frontiers in Sustainable Cities Pub Date : 2023-07-13 DOI:10.3389/frsc.2023.1103721
V. Pfeiffer, Jun Zhu, Karen C. Poh, J. Silbernagel
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引用次数: 0

摘要

城市化减少了未压实、裸露的土壤的范围和野生植物物种的覆盖范围,但当它们的栖息地保持在建筑环境中时,仍然支持不同的传粉昆虫群落。众所周知,植物的丰度和丰富度会影响蜜蜂的觅食行为,这些因素在不同的景观中各不相同,尤其是在不同的城市范围内。这项研究评估了植物资源在威斯康星州麦迪逊市的分布情况,以及这些因素如何影响觅食大黄蜂的分布。我们对威斯康星州麦迪逊市的大黄蜂进行了系统的步行横断面调查。对与5000多只非致命调查的大黄蜂相关的点位数据进行了分析,涉及700多个样带的花卉资源解释变量以及潜在的土地利用分区。我们使用Moran’s I相关图来研究花资源变量和大黄蜂数量的空间自相关,然后我们拟合了一个基于花覆盖率、密度、物种丰富度和野生植物物种丰富度的广义线性模型来预测样带蜜蜂数量。我们采用地理加权回归模型来探索整个研究范围内花卉资源解释变量影响的非平稳性。我们发现,在模型中,花朵覆盖率、物种丰富度对觅食蜜蜂数量有显著的正向影响,野花物种丰富度对蜜蜂数量有微弱的正向影响;土地利用分区分类变量也有显著的正影响。花资源预测因子对大黄蜂觅食的影响因城市景观背景而异。这项研究的结果表明,具有高覆盖率和花卉多样性的景观最大限度地提高了大黄蜂的觅食能力,而野花物种丰富度的积极影响在花卉覆盖率和整体丰富度也存在的地方尤为突出。鉴于城市景观并不同质,花卉资源在城市景观中的分布也不一致,因此应该保护宝贵的传粉昆虫栖息地,并在差距持续的地方加以补充。
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Local influence of floral resource attributes on urban bumble bee foraging activity
Urbanization diminishes the extent of uncompacted, exposed soil and the coverage of wild plant species, yet still supports diverse pollinator communities when their habitat is maintained within the built environment. Floral abundance and richness are known to influence bee foraging behavior, and these factors vary across the landscape, especially across heterogeneous urban extents. This study assesses how floral resources are distributed across the city of Madison, WI and how these factors influence the distribution of foraging bumble bees.We conducted a systematic walking transect survey of bumble bees across Madison, WI. The resulting point location data associated with more than 5,000 non-lethally surveyed bumble bees were analyzed with regard to floral resource explanatory variables as well as underlying land use zoning on more than 700 transects. We used Moran's I correlograms to investigate spatial autocorrelation in floral resource variables and bumble bee counts, then we fitted a generalized linear model predicting transect bee counts based on floral cover, density, species richness and wild plant species richness on the distribution of foraging bees. We employed a geographically-weighted regression model to explore non-stationarity in the effects of floral resource explanatory variables across the study extent.We found significant positive influence of flower cover, species richness, and weakly significant positive influence of wildflower species richness on foraging bee counts within the model as well as a significant positive influence of the land use zoning categorical variable. The effects of floral resource predictors on foraging bumble bees varies based on landscape context across the city.The results of this study show that landscapes with high cover as well as floral diversity maximize bumble bee foraging, and the positive effect of wildflower species richness stands out where floral cover and overall richness are also present. Given that urban landscapes are not homogeneous and that floral resources are not consistently distributed across the cityscape, valuable pollinator habitat should be protected, and supplemented where gaps persist.
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CiteScore
4.00
自引率
7.10%
发文量
176
审稿时长
13 weeks
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