A global review of determinants of native bee assemblages in urbanised landscapes

Insect Conservation and Diversity, Journal Year: 2022, Volume and Issue: 15(4), P. 385 - 405

Published: Feb. 10, 2022

Abstract Loss of natural habitat through land‐use change threatens bees. Urbanisation is a major, increasing form, loss, and novel, pervasive form disturbance known to impact bee diversity abundance in variety often inconsistent ways. We conducted comprehensive, semi‐quantitative review, involving 215 studies, on responses bees urban landscapes, local landscape variables proposed influence diversity. Urban areas tend be favourable for compared with agricultural ones, but areas, host more abundant populations yet fewer species. Factors associated including changes foraging resources nesting substrate types availability, contribute abundance, species richness, composition native assemblages. However, the conclusions studies vary greatly because difference ecological traits bees, habitats surveyed, geographic region, as well noise data resulting from inconsistencies sampling methodology, definitions ‘urban’ ‘natural’. Identifying what biotic abiotic features cityscapes promote or threaten persistence critical. provide comprehensive evaluation how (both aggregate according their guild) have responded environment, identify gaps knowledge ecology, make recommendations advance our understanding environments conservation diverse communities.

Language: Английский

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Bee diversity decreases rapidly with time since harvest in intensively managed conifer forests

Ecological Applications, Journal Year: 2023, Volume and Issue: 33(5)

Published: April 11, 2023

Abstract Despite widespread concerns about the anthropogenic drivers of global pollinator declines, little information is available impacts land management practices on wild bees outside agricultural systems, including in forests managed intensively for wood production. We assessed changes bee communities with time since harvest 60 Douglas‐fir ( Pseudotsuga menziesii ) stands across a gradient stand ages spanning typical rotation. measured abundance, species richness, and alpha beta diversity, as well habitat characteristics (i.e., floral resources, nesting substrates, understory vegetation, early seral forest surrounding landscape) during spring summer 2018 2019. found that abundance richness declined rapidly age, decreasing by 61% 48%, respectively, every 5 years timber harvest. Asymptotic estimates Shannon Simpson diversity were highest 6–10 post‐harvest lowest after canopy had closed, ~11 post‐harvest. Bee older nested subsets younger stands, indicating due to loss rather than turnover aged. abundance—but not richness—was positively associated resource density, neither metric was richness. The amount landscape seemed enhance older, closed‐canopy but otherwise effect. Changes relative did relate functional such sociality, diet breadth, or substrate. Our study demonstrates plantations develop diverse shortly harvest, those erode over canopies close. Therefore, stand‐scale activities prolong precanopy closure period resources initial stage regeneration will provide greatest opportunity landscapes dominated conifer forests.

Language: Английский

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Standardising bee sampling: A systematic review of pan trapping and associated floral surveys

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(3)

Published: March 1, 2024

Abstract The use of coloured pan traps (bee bowls, Moericke traps) for sampling bees (and other pollinators) has continuously increased over the last two decades. Although a number methodological studies and conceptual frameworks offer guidance on standardised sampling, trap setups vary widely in characteristics even when optimised capturing bees. Moreover, some uncertainty persists as to how local flower abundance diversity influence sampling. We systematically reviewed peer‐reviewed that used bee collection were listed Web Science core collection. To gauge variation, we identified set relevant criteria assessed accordingly. For obtaining evidence samples floral environment around are correlated, screened such correlations. While aspects trapping (e.g., coloration elevation) similar majority studies, varied considerably volume/diameter duration). Few and/or an explanatory variable their analyses samples. Among these found considerable variation key survey methods, time space between vegetation surveys measures (quantitative, semi‐quantitative presence–absence), processing raw data prior analysis. Often did not find any correlation Reported correlations markedly across within groups applying method or analysing group Our synthesis helps identify issues further standardisation methodology associated surveys. In addition few have been past decades, suggest direction future research using better wild encourage illuminate if varying resources bias from traps. More generally, our shows methodologies should be regularly increases ensure standardisation.

Language: Английский

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Pursuing best practices for minimizing wild bee captures to support biological research

Conservation Science and Practice, Journal Year: 2022, Volume and Issue: 4(7)

Published: June 3, 2022

Abstract Bees are important pollinators of wild and domesticated flowering plant species. Over the last 30 years, an increasing number scientific articles have been published on ecology conservation bees. To achieve research goals, many studies pursued lethal take Although impact for pursuits is likely negligible compared to negative impacts human‐mediated phenomena such as climate change, urbanization, agricultural intensification, it evaluate history endeavors. In our study, we evaluated a random sample years publications Across 1426 surveyed publications, 536 reported We found that 61% these lethally captured bees primarily species identification. Furthermore, determined passive sampling resulted in substantially more collections than active methods per study. However, combined approaches collection greatest Finally, 64% did not provide deposition information their samples, hindering additional could be done with them. The availability video photographic devices artificial intelligence identification, development low noninvasive molecular methods, ease sharing information, allow timely discussion alternative routes potentially new best practices bee research. focus minimizing captures identification purposes through maximizing utility data collected. framework continued engagement among researchers managers develop strategies can contribute reducing communities making most collected specimens.

Language: Английский

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Assessing the impacts of urban beehives on wild bees using individual, community, and population-level metrics

Urban Ecosystems, Journal Year: 2023, Volume and Issue: 26(5), P. 1209 - 1223

Published: May 22, 2023

Language: Английский

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Extreme species density of bees (Apiformes, Hymenoptera) in the warm deserts of North America

Journal of Hymenoptera Research, Journal Year: 2021, Volume and Issue: 82, P. 317 - 345

Published: April 29, 2021

Despite the long intertwined evolutionary histories of bees and plants, bee diversity peaks in xeric areas eastern western hemispheres not tropics, where plant is greatest. Intensive sampling northeast Chihuahuan Desert Mexico United States provide first quantitative estimate species richness high had been predicted North America from museum records. We find that density a limited area 16 km 2 far exceeds any other site world amounts to approximately 14% described States. Long-term studies pollinators are minimally impacted by humans much-needed baseline data for human impacts more severe as climate change accelerates.

Language: Английский

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Bee surveys in Brazil in the last six decades: a review and scientometrics

Apidologie, Journal Year: 2021, Volume and Issue: 52(6), P. 1152 - 1168

Published: Oct. 15, 2021

Language: Английский

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Estimating bee abundance: can mark-recapture methods validate common sampling protocols?

Apidologie, Journal Year: 2022, Volume and Issue: 53(1)

Published: March 1, 2022

Abstract Wild bees can be essential pollinators in natural, agricultural, and urban systems, but populations of some species have declined. Efforts to assess the status wild are hindered by uncertainty common sampling methods, such as pan traps aerial netting, which may or not provide a valid index abundance across habitats. Mark-recapture methods effective means estimating population size, widely used vertebrates rarely applied bees. Here we review existing mark-recapture studies present new case study comparing estimates trap net capture for four taxa bee community. Net, trap, was correlated with sites taxa. Logistical limitations ensure that will fully replace other they do feasible way monitor selected measure performance methods.

Language: Английский

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Wild bees show local spatial and temporal dynamics in southeastern US blueberry farmscapes

Environmental Entomology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Abstract Wild bee communities are the target of various conservation and ecological restoration programs. Strategic can influence visiting fields help mitigate pollinator limitations in fruit production. However, planning compatible strategies gauging their effectiveness requires understanding how local vary across space time crops adjacent semi-natural areas. Here, we assessed spatiotemporal changes composition wild blueberry forests. In partnership with commercial farms southeast Georgia, USA, deployed blue vane traps at interior edge within forests 8 fields, from March to October over 2 yr. We identified 72 species 26 genera. The most common were Melissodes communis (Cresson, Hymenoptera: Apidae), Bombus bimaculatus (Lepeletier), Ceratina floridana (Mitchell, Lasioglossum pectorale (Smith, Halictidae), nymphale (Smith), which accounted for nearly 60% bees caught. Bee diversity richness fluctuated time, peaks all 3 habitat types occurring after blooming. abundance forest was relatively constant throughout season, while field assemblages, peaked between May June. observed dissimilarity related month location. This difference explained by fluctuation identity relative abundant species. Together, our study advances foundational knowledge community dynamics will inform prioritize practices.

Language: Английский

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Sampling Strategies for Wild Bees

Published: Jan. 1, 2025

Language: Английский

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