Assessing the contribution of lawns and semi-natural meadows to bee, wasp, and flower fly communities across different landscapes

IF 2.5 3区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION Urban Ecosystems Pub Date : 2024-03-01 DOI:10.1007/s11252-024-01516-2
Sabrina Cloutier, Poliana Mendes, Jérôme Cimon-Morin, Stéphanie Pellerin, Valérie Fournier, Monique Poulin
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Abstract

Land conversion and intensive vegetation management are major drivers of shifts in insect communities, including economically valuable species. We evaluated the impact of lawns and meadows across agricultural, residential, and industrial landscapes in structuring bees, wasps, and flower flies communities. We carried out plant and insect inventories on 18 lawns and 18 meadows distributed evenly among agricultural, residential, and industrial landscapes within the Greater Quebec City region (Quebec, Canada). Insect sampling was conducted five times using bowl traps and entomological nets, from June to September 2020. Results indicate taxon-specific responses to landscape matrix and site maintenance. Agricultural landscapes negatively influenced bee abundance compared to urban areas, while the opposite trend was observed for flower flies. Wasp abundance and richness were negatively influenced by both agricultural and industrial matrices compared to residential landscapes. Regarding site maintenance, bees and wasps were 3 and 12 times more abundant and 2 and 6 times more species-rich, respectively, in meadows than in lawns as per the data aggregated across the sampling date. Flower fly abundance was higher in meadows than in lawns for agricultural and residential landscapes only, while richness was consistently higher (2 times greater) in meadows compared to lawns. Some species of the sweat bee genus Lasioglossum and the flower fly margined calligrapher (Toxomerus marginatus) were dominant in lawns, while meadows hosted a more balanced community among genera and supported pollinators with wide-ranging resource requirements. Our results suggest that conservation actions should consider both landscape and local management to conserve central-place foragers, such as bees and wasps, and for structuring flower fly species composition.

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评估草坪和半天然草地对不同景观中蜜蜂、黄蜂和花蝇群落的贡献
土地转换和密集型植被管理是昆虫群落(包括具有经济价值的物种)发生变化的主要驱动因素。我们评估了农业、住宅和工业景观中的草坪和草甸对蜜蜂、黄蜂和花蝇群落结构的影响。我们在大魁北克市地区(加拿大魁北克省)的 18 块草坪和 18 块草地上进行了植物和昆虫调查,这些草坪和草地平均分布在农业、住宅和工业景观中。从 2020 年 6 月到 9 月,使用碗式诱捕器和昆虫网进行了五次昆虫采样。结果表明,分类群对景观基质和场地维护有特定的反应。与城市地区相比,农业景观对蜜蜂的丰度有负面影响,而对花蝇的影响则呈相反趋势。与居住区景观相比,黄蜂的丰度和丰富度受到农业和工业景观的负面影响。在场地维护方面,根据取样日期的汇总数据,草地上蜜蜂和黄蜂的数量分别是草坪上的 3 倍和 12 倍,物种丰富度分别是草坪上的 2 倍和 6 倍。仅就农业和住宅景观而言,草地上的花蝇丰度高于草坪,而草地上的花蝇丰富度始终高于草坪(高出 2 倍)。汗蜂属 Lasioglossum 和花蝇边缘书法家(Toxomerus marginatus)中的一些物种在草坪中占优势,而草甸中各属之间的群落更为平衡,支持着对资源有广泛需求的传粉昆虫。我们的研究结果表明,保护行动应同时考虑景观和地方管理,以保护蜜蜂和黄蜂等中心觅食者,并构建花蝇物种组成结构。
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来源期刊
Urban Ecosystems
Urban Ecosystems BIODIVERSITY CONSERVATION-ECOLOGY
CiteScore
5.70
自引率
6.90%
发文量
113
期刊介绍: Urban Ecosystems is an international journal devoted to scientific investigations of urban environments and the relationships between socioeconomic and ecological structures and processes in urban environments. The scope of the journal is broad, including interactions between urban ecosystems and associated suburban and rural environments. Contributions may span a range of specific subject areas as they may apply to urban environments: biodiversity, biogeochemistry, conservation biology, wildlife and fisheries management, ecosystem ecology, ecosystem services, environmental chemistry, hydrology, landscape architecture, meteorology and climate, policy, population biology, social and human ecology, soil science, and urban planning.
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