Contributions of phenological groups of wild bees as an indicator of food availability in urban wastelands

Twerd, Lucyna; Banaszak‐Cibicka, Weronika; Sobieraj-Betlińska, Anna; Waldon‐Rudzionek, Barbara; Hoffmann, Renata

doi:10.1016/j.ecolind.2021.107616

Cited by 9 publications

(5 citation statements)

References 57 publications

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“…Urbanization had strong negative effects on the abundance and richness of spring pollinator communities. As suggested by previous studies, this might be driven by the scarcity of early spring and spring-blooming shrubs and trees in cities and thus the overall lack of early spring and spring food resources for pollinators (Matteson et al, 2008;Twerd et al, 2021). Solitary bee species that are ground-nesters and spring flyers (e.g.…”

Section: Pollinator Trait Shiftsmentioning

confidence: 95%

“…Urbanization is one of the most profound drivers of anthropogenic change with major impacts on global biodiversity (Seto et al, 2012;Van Klink et al, 2020). Urban development results in habitat loss and fragmentation, increase in impervious surfaces, introduction of non-native species, heat-island effects and environmental contaminants (e.g.…”

Section: Introductionmentioning

confidence: 99%

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The effects of urbanization on pollinators and pollination: A meta‐analysis

Liang

Theodorou

et al. 2023

Ecology Letters

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Urbanization is increasing worldwide, with major impacts on biodiversity, species interactions and ecosystem functioning. Pollination is an ecosystem function vital for terrestrial ecosystems and food security; however, the processes underlying the patterns of pollinator diversity and the ecosystem services they provide in cities have seldom been quantified. Here, we perform a comprehensive meta‐analysis of 133 studies examining the effects of urbanization on pollinators and pollination. Our results confirm the widespread negative impacts of urbanization on pollinator richness and abundance, with Lepidoptera being the most affected group. Furthermore, pollinator responses were found to be trait‐specific, with below‐ground nesting and solitary Hymenoptera, and spring flyers more severely affected by urbanization. Meanwhile, cities promote non‐native pollinators, which may exacerbate conservation risks to native species. Surprisingly, despite the negative effects of urbanization on pollinator diversity, pollination service measured as seed set is enhanced in non‐tropical cities likely due to abundant generalists and managed pollinators therein. We emphasize that the richness of local flowering plants could mitigate the negative impacts of urbanization on pollinator diversity. Overall, the results demonstrate the varying magnitudes of multiple moderators on urban pollinators and pollination services and could help guide conservation actions for biodiversity and ecosystem function for a sustainable future.

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Section: Pollinator Trait Shiftsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

The effects of urbanization on pollinators and pollination: A meta‐analysis

Liang

Theodorou

et al. 2023

Ecology Letters

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“…Here, the number of bee species is slightly lower than in other large European cities such as Poznan (206 species) [ 41 ] and Zurich (164 bee species) [ 42 ], but higher than in North American metropolises (Chicago: 83 bee species [ 43 ]; New York City: 98 species [ 44 ]), although some variation is likely to arise from climate differences. Furthermore, bee species lists grow considerably larger when surveys are conducted over broader areas encompassing low density suburbs (Lyon region, France: 291 species [ 2 ]; Bydgoszcz region, Poland: 242 species [ 45 ]).…”

Section: Discussionmentioning

confidence: 99%

Keeping Up with Insect Pollinators in Paris

Zaninotto

Dajoz

2022

Animals

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There is growing interest in urban pollinator communities, although they may be subject to biotic homogenization in densely artificial landscapes. Paris (France) is one of the densest cities in the world, yet over the years many insect pollinator species have been reported there. We conducted in-depth surveys of Parisian green spaces for two years, in order to improve our knowledge of these assemblages. We explored several types of green spaces, monitoring pollinators throughout their activity season. We listed 118 species of wild bees and 37 species of hoverflies, updating pre-existing lists with 32 additional species. Bee assemblages showed functional diversity with 18.5% parasitic species and 17.7% oligolectic species. We also found several bee and hoverfly species under special conservation status. Over the study period, we observed seasonal succession of species, with diversified phenological niches. The greatest taxonomic and functional diversity was found in green spaces combining several habitats with ecological management. Despite its very dense urbanism, Paris is home to diverse pollinator communities. As a result, nearly half of the wild bee species of the wider Ile-de-France administrative region can be found within the city. This highlights the need to also consider dense urban environments in insect pollinator conservation strategies.

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“…The loss of green areas can impact the richness and abundance of flower-visitor communities in cities, what can jeopardize the biodiversity and functional richness of that community (Spiesman & Inouye, 2013;Geslin et al, 2016). Controlled environments may be critical for the preservation of flower-visiting species in urban areas (Smith, 2006;Larson, 2014;Twerd & Banaszak-Cibicka, 2019;Twerd et al, 2021), what demonstrates that even small green areas are important for insect conservation. However, urban administrators should ideally plan to create urban parks which support, attract and maintain flower-visitors and have a large vegetation cover and a high variety of plant species, preferably with different morphologies (Garbuzov & Ratnieks, 2014;Banaszak-Cibicka et al, 2016;Hall et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Flower Visitation by Bees, Wasps and Ants: Revealing How a Community of Flower-Visitors Establish Interaction Networks in a Botanical Garden

et al. 2022

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The Hymnoptera order includes several flower-visiting insects (e.g. ants, bees, and wasps) and the coexistence of many different species in the same community can generate interspecific competition. Notwithstanding shared communities, research which evaluates how these taxonomic groups influence a whole community of flower-visiting Hymenoptera is lacking. Moreover, abiotic factors can also impact these floral visits, because each organism responds differently to climatic variations. The goal of this study is to evaluate abiotic factors, specifically relative air humidity and air temperature, which may be able to impact the number and the frequency of interactions between hymenopterans and flowers and to assess the composition and niche organization, by making use of interaction networks, of the entire community of flower-visiting Hymenoptera at the botanical garden of the Universidade Federal Rural do Rio de Janeiro. For the duration of a year, we took samples in that botanical garden, compartmentalizing the collections temporally in accordance with the time of the insects’ shift (morning or afternoon). We observed a positive influence of air temperature on the number of ant interactions and visits. It is also possible to observe that most of these interaction networks exhibited a nested and non-modular pattern and an average level of network specialization. In addition, bees stood out as the species with the highest frequency of visits and with the most generalist behavior. This study demonstrates how a botanical garden can sustain a diverse community of floral visiting Hymenoptera in an urban environment and why it consists in an important tool for biodiversity conservation.

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Contributions of phenological groups of wild bees as an indicator of food availability in urban wastelands

Cited by 9 publications

References 57 publications

The effects of urbanization on pollinators and pollination: A meta‐analysis

The effects of urbanization on pollinators and pollination: A meta‐analysis

Keeping Up with Insect Pollinators in Paris

Flower Visitation by Bees, Wasps and Ants: Revealing How a Community of Flower-Visitors Establish Interaction Networks in a Botanical Garden

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