Forests are critically important to global pollinator diversity and enhance pollination in adjacent crops

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2023, Volume and Issue: 98(4), P. 1118 - 1141

Published: March 6, 2023

ABSTRACT Although the importance of natural habitats to pollinator diversity is widely recognized, value forests pollinating insects has been largely overlooked in many parts world. In this review, we ( i ) establish global diversity, ii explore relationship between forest cover and mixed‐use landscapes, iii highlight contributions forest‐associated pollinators pollination adjacent crops. The literature shows unambiguously that native support a large number forest‐dependent species are thus critically important diversity. Many taxa require or benefit greatly from resources restricted forests, such as floral provided by plants (including wind‐pollinated trees), dead wood for nesting, tree resins, various non‐floral sugar sources (e.g. honeydew). landscape‐scale studies generally conclusion enhance findings often complicated spatial scale, focal taxa, landscape context, temporal type, disturbance history, external stressors. While some loss can be beneficial enhancing habitat complementarity, too much result near‐elimination species. There strong evidence multiple crop types substantially increase yields habitats, at least within foraging ranges involved. also suggests may have enhanced future given their role mitigating negative effects pesticides climate change. questions remain about amount configuration required promote services neighbouring habitats. However, it clear current body knowledge any effort preserve woody including protection individual trees, will help maintain critical they provide.

Language: Английский

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Wild bees as winners and losers: Relative impacts of landscape composition, quality, and climate

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(6), P. 1250 - 1265

Published: Jan. 12, 2021

Wild bees, like many other taxa, are threatened by land-use and climate change, which, in turn, jeopardizes pollination of crops wild plants. Understanding how factors interact is critical to predicting managing pollinator populations ensuring adequate services, but most studies have evaluated either or effects, not both. Furthermore, bee species incredibly variable, spanning an array behavioral, physiological, life-history traits that can increase decrease resilience change. Thus, there likely benefit, while others suffer, from changing land use, few documented taxon-specific trends. To address these knowledge gaps, we analyzed a long-term dataset occurrences Maryland, Delaware, Washington DC, USA, examining different genera functional groups respond landscape composition, quality, factors. Despite large body literature documenting effects on this study, emerged as the main drivers wild-bee abundance richness. For communities spring summer/fall, temperature precipitation were more important predictors than topography. However, relationships varied substantially between groups. In Northeast past trends future predictions show with warmer winters, intense winter spring, longer growing seasons higher maximum temperatures. almost all our analyses, conditions associated lower bees. Wild-bee richness results mixed, including neutral positive predicted patterns. region undoubtedly broadly, poses significant threat communities.

Language: Английский

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Different types of semi‐natural habitat are required to sustain diverse wild bee communities across agricultural landscapes

Journal of Applied Ecology, Journal Year: 2022, Volume and Issue: 59(10), P. 2604 - 2615

Published: Aug. 2, 2022

Abstract Semi‐natural habitats provide important resources for wild bees in agricultural landscapes. Landscapes under management are dynamic and floral fluctuate space time. Thus, promoting different semi‐natural habitat types within landscapes could be key to support diverse bee meta‐communities throughout the season. Here, we integrate analyses of α‐diversity (species richness) β‐diversity species‐habitat networks examine relative contribution all major We sampled extensively conventionally managed meadows, flower strips, hedgerows forest edges spring, early late summer 25 Switzerland. Habitat varied their importance season: While meadows supported more rare species, specialists species overall than other types, strips were most later Each five investigated harboured relatively unique sets with generally acting as distinct modules bee‐habitat network. Not only richness a per se, but also flower‐habitat network properties (habitat strength functional complementarity) good predictors richness. In addition local richness, landscape composition configuration interactively influenced patterns across habitats. Synthesis applications . Our study highlights value pollinator‐habitat analysis inform pollinator conservation at scale, especially when combined information on networks. Maintaining offers complementary season, which crucial sustain Particularly meadow extensification schemes can play role safeguarding specialist these locally high promoted abundance general, our results indicate that increasing connectivity between patches dominated by arable crops appears improve exchange communities habitats, thereby possibly resilience disturbances.

Language: Английский

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The Value of Forests to Pollinating Insects Varies with Forest Structure, Composition, and Age

Current Forestry Reports, Journal Year: 2024, Volume and Issue: 10(5), P. 322 - 336

Published: July 9, 2024

Language: Английский

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Forest-associated bee species persist amid forest loss and regrowth in eastern North America

Biological Conservation, Journal Year: 2021, Volume and Issue: 260, P. 109202 - 109202

Published: June 24, 2021

Language: Английский

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

AMBIO, Journal Year: 2024, Volume and Issue: unknown

Published: May 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.

Language: Английский

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Spatial mismatch between wild bee diversity hotspots and protected areas

Conservation Biology, Journal Year: 2023, Volume and Issue: 37(4)

Published: Feb. 22, 2023

Abstract Wild bees are critical for multiple ecosystem functions but currently threatened. Understanding the determinants of spatial distribution wild bee diversity is a major research gap their conservation. We modeled α and β taxonomic functional in Switzerland to uncover countrywide patterns determine extent which they provide complementary information, assess importance different drivers structuring diversity, identify hotspots overlap between network protected areas. used site‐level occurrence trait data from 547 species across 3343 plots calculated community attributes, including metrics, mean values, metrics. with predictors describing gradients climate, resource availability (vegetation), anthropogenic influence (i.e., land‐use types beekeeping intensity). changed along climate availability; high‐elevation areas had lower xeric harbored more diverse communities. Functional diversities diverged this pattern, high elevations hosting unique combinations. The proportion included depended on biodiversity facet, most occurred unprotected land. Climate drove resulting overall at higher elevations, simultaneously greater uniqueness. This mismatch among distinct facets degree challenge conservation, especially face global change, calls better integrating application predictive models represents valuable tool aid future development achieve conservation goals.

Language: Английский

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Green patches among a grey patchwork: the importance of preserving natural habitats to harbour cavity-nesting bees and wasps (Hymenoptera) and their natural enemies in urban areas

Biodiversity and Conservation, Journal Year: 2020, Volume and Issue: 29(8), P. 2487 - 2514

Published: May 8, 2020

Language: Английский

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Effects of Landscape and Local Factors on the Diversity of Flower-Visitor Groups under an Urbanization Gradient, a Case Study in Wuhan, China

Diversity, Journal Year: 2022, Volume and Issue: 14(3), P. 208 - 208

Published: March 11, 2022

Urbanization is one of the primary forces driving worldwide pollinator decline. Moderate urban expansion with appropriate green space planning can help in maintaining diversity and pollination service. We investigated relative effects landscape local factors on flower-visitor functional groups a moderately urbanized city, Wuhan, located central China. found that proportion impervious surface had no significant effect number visitations, but it was negatively associated groups. The visitations by Halictidae Lepidoptera correlated positively flower density flowering plant species richness, respectively. Flowering richness also visitation Muscidae overall groups, revealing potential influence quality assemblage. networks under three urbanization levels (with total 11 visitor 43 species) were asymmetric, highly nested, generalized. suburb sites contained highest interactions. Core plants (Oenothera speciosa, Coreopsis grandiflora Cyanus segetum) are exotic attractive flowers. Improving (high richness) using native (Nandina domestica, Rosa chinensis, Astragalus sinicus, Cirsium arvense var. integrifolium, Zabelia biflora) would enhance function to maintain ecosystem stability.

Language: Английский

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Canopy sampling reveals hidden potential value of woodland trees for wild bee assemblages

Insect Conservation and Diversity, Journal Year: 2022, Volume and Issue: 16(1), P. 33 - 46

Published: Oct. 13, 2022

Abstract Woodlands can play an important role in supporting bee abundance and diversity agricultural landscapes. However, temperate‐region studies, the canopy is rarely sampled, our understanding of its contribution limited. To explore this, we sampled bees late spring with blue vane traps understory ( n = 30) crowns mature Quercus robur 35) at exposed southern edges interiors (ca. 25–75 m from woodland edges) 15 sites across English landscape. A significant proportion was found canopy: canopy‐trap catches were estimated to be a third as large understory‐trap catches, 23 29 species present canopy. Of seven most common four equally abundant edge interior traps; three more traps, single species— Bombus lapidarius —was traps. The sex ratio species, B. pratorum , female‐skewed Additionally, presence nearby Acer pseudoplatanus trees flower greatly increased interiors. These results suggest that both have farmland communities; they indicate importance nectar‐producing interiors, opening avenues for canopy‐based management; demonstrate diverse community has potential exploit floral resources.

Language: Английский

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