Bees in the city: Findings from a scoping review and recommendations for urban planning

AMBIO, Год журнала: 2024, Номер unknown

Опубликована: Май 20, 2024

Over the last decades, bee biodiversity has dropped sharply due to land use change, including urbanization. To contrast this, recent research pointed cities as a hotspot for bees. Because of this ambiguity, scoping review been conducted examine urban characteristics that impact bees and how are impacted. A total 276 articles were analyzed against landscape local habitat characteristics. The key findings include first natural areas more valuable since levels higher. Second, generally score better than agricultural rural areas. Third, plant positively influences biodiversity. Fourth, environment strongly affects some traits proportion native For making friendly inclusive, we recommend maintain areas, connect ecosystems, encourage floral abundance diversity increasing size green overall.

Язык: Английский

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Capabilities and limitations of using DNA metabarcoding to study plant–pollinator interactions

Molecular Ecology, Год журнала: 2021, Номер 30(20), С. 5266 - 5297

Опубликована: Авг. 13, 2021

Many pollinator populations are experiencing declines, emphasizing the need for a better understanding of complex relationship between bees and flowering plants. Using DNA metabarcoding to describe plant-pollinator interactions eliminates many challenges associated with traditional methods has potential reveal more comprehensive foraging behaviour life history. Here we use ITS2 rbcL gene regions identify plant species present in pollen loads 404 from three habitats eastern Oregon. Our specific objectives were (i) determine whether identified using consistent observations, (ii) compare characterizations diet breadth derived observations those based on assignments obtained metabarcoding, (iii) produced by "regional" reference database "local" database. At locations, 31%-86% data, 8%-50% differed 22%-25% detected regional not known occur study area question. Plant-pollinator networks data had higher sampling completeness significantly lower specialization than observations. Here, examine some strengths limitations bee loads, make ecological inferences about provide guidance future research.

Язык: Английский

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Opportunities for and Impediments to Pollinator Conservation in Urban Settings: A Review

Journal of Integrated Pest Management, Год журнала: 2022, Номер 13(1)

Опубликована: Янв. 1, 2022

Abstract Urban plants and the design maintenance of urban landscapes play a critical role in pollinator conservation preservation essential ecosystem services. Effective decisions planning require careful assessment consequences land use change, effects local landscape scale factors on bees, butterflies, flies, other pollinators. Understanding not under-estimating needs various functional guilds to inform strategies are success. Research indicates that diverse assemblages can be enhanced conserved areas through efforts. Education communication key elements needed engage policy makers move forward at accelerated pace required address current (rapid urbanization) impending (climate change invasive species) challenges. Conservation protection pollinators services they provide we from reactive proactive activities tie together regional Citizen science initiatives effective ways communicate information, garner public support, acquire valuable data concerning cost-effective manner. Improving our knowledge bee life history, phenology, nesting sites is essential. lifecycles lesser-known like flies (Diptera) wasps (Hymenoptera) vital while there need expand available taxonomic expertise. In this review, discuss case studies integrating pest management plant selection, recreational area design, community engagement with goal conservation. Decision-making resources included.

Язык: Английский

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Environmental ameliorations and politics in support of pollinators. Experiences from Europe: A review

Journal of Environmental Management, Год журнала: 2024, Номер 362, С. 121219 - 121219

Опубликована: Июнь 1, 2024

At least 87% of angiosperm species require animal vectors for their reproduction, while more than two-thirds major global food crops depend on zoogamous pollination. Pollinator insects are a wide variety organisms that diverse biotic and abiotic resources. Many factors have contributed to serious decrease in the abundance populations diversity pollinator over years. This decline is alarming, European Union has taken several actions aimed at counteracting it by issuing new conservation policies standardizing member countries. In 2019, Green Deal was presented, aiming restore 100% Europe's degraded land 2050 through financial legislative instruments. Moreover, Common Agricultural Policies entailed greening measures habitats beneficial 10 The CAP (CAP 23–27) reinforces objectives strategic plans based eco-schemes defined national level countries, some states specifically conservation. Here, we review framework EU policies, directives, regulations, which include protecting pollinators agricultural, urban, peri-urban environments. reviewed literature reporting experimental works environmental amelioration pollinators, particularly those where were implemented evaluated, as well studies conducted urban areas. Among measures, considered sowing management entomophilous plants reported results important ameliorations. Some wasteland areas been host considerable number especially wild bees, despite lack specific potential contribute could be enhanced targeted actions, highlighted studies.

Язык: Английский

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Diversity of greenspace design and management impacts pollinator communities in a densely urbanized landscape: the city of Paris, France

Urban Ecosystems, Год журнала: 2023, Номер 26(2), С. 503 - 515

Опубликована: Март 30, 2023

Abstract The response of insect pollinator communities to increasing urbanization is shaped by landscape and local factors. But what about habitats that are already highly artificial? We investigated the drivers diversity in a dense urban matrix, city Paris. monitored monthly (March-October) for two consecutive years 12 green spaces differed their management practices, focusing on four orders (Hymenoptera, Diptera, Lepidoptera, Coleoptera). Pollinator abundance species richness were both positively tied space size flowering plant richness, but negatively linked surrounding impervious surfaces. In addition, environmental features at scales influenced composition functional wild bee communities. Indeed, small large bees responded differently, with occurrence large-bodied being impaired proportion surfaces strongly enhanced richness. Also, sites majority spontaneous had more functionally diverse communities, oligolectic likely be found. These results, consistent literature, can guide design practices promote pollination function, even environments.

Язык: Английский

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Shared use of a mass‐flowering crop drives dietary niche overlap between managed honeybees and bumblebees

Journal of Applied Ecology, Год журнала: 2024, Номер 61(9), С. 2135 - 2145

Опубликована: Авг. 1, 2024

Abstract Resource competition between wild pollinators and managed honeybees ( Apis mellifera ) has the potential to detrimentally impact insect biodiversity as well plant crop pollination. As are central place foragers, their competitive on bees is expected be structured by hive proximity, in conjunction with foraging decisions related landscape‐level resource availability. Yet, how these factors structure dietary niche overlap remains unclear. We conducted a field experiment seminatural grasslands, where honeybee densities buff‐tailed bumblebees Bombus terrestris were measured at four distances (<100, 500, 1000 2000 m) from experimentally placed apiaries, during after blooming period of mass‐flowering oilseed rape Brassica napus ). using standardized transect surveys, quantified species diet composition pollen samples collected both bee species. Honeybee highest near apiaries declined sharply beyond 500 m apiaries. However, was unrelated proximity but positively availability rape. Furthermore, there significant inter‐ intraspecific differences breadth throughout season. Synthesis applications : Niche agricultural environments due sharing When predominantly forage plants, they maintain distinct diets, suggesting low risk generalist taxa. Conservation actions that promote floral diversity landscapes crucial differentiation bees.

Язык: Английский

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Planning to Practice: Impacts of Large-Scale and Rapid Urban Afforestation on Greenspace Patterns in the Beijing Plain Area

Forests, Год журнала: 2021, Номер 12(3), С. 316 - 316

Опубликована: Март 8, 2021

(1) Research Highlights: Afforestation is one of the most effective urban greening practices for mitigating a variety environmental issues. Globally, municipal governments have launched large-scale afforestation programs in metropolitan areas during last decades. However, spatiotemporal dynamics greenspace patterns are seldom studied such programs. (2) Background and Objectives: In this study, Beijing Plain Project (BPAP), which planted 70,711 ha trees only four years, was examined by integrating spatial landscape analysis. To evaluate real-world outcomes massive program, we investigated spatial-temporal implementation process to identify potential impacts challenges future management new afforestation. (3) Materials Methods: We analyzed transition various patch types sizes, applied indicators measure temporal changes patterns, used expansion index quantify rate extent expansion. (4) Results: Our results illustrated that plain area had generally achieved its initial goal increasing proportion land devoted forest (increased 8.43%) parks 0.23%). also accelerated conversion small-size greenspaces large-size patches. significant discrepancies found between planned actual sites, as well large cropland forest, may present major project optimization management. (5) Conclusions: This study demonstrated analysis useful potentially replicable method can rapidly provide data support further ecosystem assessments insights into inner-city projects.

Язык: Английский

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Pollinators and urban riparian vegetation: important contributors to urban diversity conservation

Environmental Sciences Europe, Год журнала: 2022, Номер 34(1)

Опубликована: Авг. 24, 2022

Abstract Background Urbanization process around the world has not only changed patterns of land use, but also fragmented habitat, resulting in significantly biodiversity loss. Urban rivers, serve as one natural corridors urban ecosystems, are importance for ecosystem stability. However, few studies have been done to explore relationship between vegetation and pollinators river segments. In this study, two streams city Chongqing were selected study area, riparian vegetation, butterflies bees investigated along all four seasons a year illustrate spatial temporal distribution patterns. Simultaneously, ecological functions corridor analyzed. Result 109 plant species belonging 95 genera 39 families recorded; number sampled 12 13, respectively. The diversity among butterfly, bee different, trends variation them similar streams. Bees found be more closely correlated with native flowering plants zone, rather than cultivated vegetation. Conclusions rivers plays an important role conservation by serving corridor. This provides data supporting protection remaining patches restoration damaged habitats city. survey accumulated on rivers.

Язык: Английский

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Pollinator dependence and pollination deficit in Hedera helix, and effects on frugivore feeding choices

Journal of Pollination Ecology, Год журнала: 2024, Номер 35, С. 14 - 28

Опубликована: Янв. 31, 2024

English ivy (Hedera helix) is an important resource for wildlife in rural and urban ecosystems. It provides pollen nectar flower-visiting insects during autumn fruits frugivores winter spring. A requirement of insect pollination fruit set implies that recent declines pollinator populations can threaten food supply frugivores. This study investigated the link between services quantity quality produced ivy, how could turn influence frugivore feeding choices, a mixed woodland garden habitat respectively. Surveys on community activity were conducted to assess overall level pollination. experiments involving exclusion, open pollination, extra supplementation was performed reveal dependence deficit ivy. Additionally, removal these by measured test whether preferences are influenced initial Our results showed (size) significantly reduced under which strong evidence dependence. Pollination also identified at both sites. Furthermore, data indicate display some degree preference well-pollinated fruits. Taken together, our shows will have direct impacts availability Maintaining health communities habitats therefore ensure healthy ecosystem functioning.

Язык: Английский

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Larger cities host richer bee faunas, but are no refuge for species with concerning conservation status: empirical evidence from Western Europe.

Basic and Applied Ecology, Год журнала: 2024, Номер 79, С. 131 - 140

Опубликована: Июнь 19, 2024

In the context of worldwide biodiversity and wild bee decline, it is increasingly important to better understand effect land-use changes on communities at a global scale. To do so, we studied city area urban green spaces layout species richness community composition, as well with an unfavorable UICN conservation status. This study was based large European dataset encompassing 20 cities from France, Belgium Switzerland. We found mean in 96 ± 48 (SD), showing that this highly variable among cities. The main factor positively influencing city. Conversely, not significantly related total given city, measured spatial extent parks, wastelands other semi-natural habitats, excluding private gardens. Species status were quite scarce environments, especially when compared Red List Bees, could link their presence either or space area. Dissimilarities compositions associated any characteristics dissimilarity composition mainly driven by rarest species, most common ones majority sampled. Overall, these results emphasize larger host more but are no refuge for concerning Thus, stakeholders encouraged design favor support communities, perhaps mitigate established ecological filter.

Язык: Английский

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