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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Impact of Biotic and Abiotic Stressors on Managed and Feral Bees

Insects, Journal Year: 2019, Volume and Issue: 10(8), P. 233 - 233

Published: Aug. 1, 2019

Large-scale declines in bee abundance and species richness over the last decade have sounded an alarm, given crucial pollination services that bees provide. Population dips specifically been noted for both managed feral species. The simultaneous increased cultivation of bee-dependent agricultural crops has rise to additional concern. As a result, there surge scientific research investigating potential stressors impacting bees. A group environmental anthropogenic negatively isolated. Habitat destruction diminished availability floral resources nest habitats, while massive monoculture plantings limited access variety pollens nectars. rapid spread resistance buildup various parasites, pathogens, pests current control methods are implicated deteriorating health. Similarly, many pesticides widely applied on within beehives toxic global distribution honey colonies (including queens with attendant bees) bumble from crop events linked pathogen stress competition native resources. Climatic alterations disrupted synchronous emergence flower blooming reduced diverse resources, leading physiological adaptations. Interactions amongst multiple created colossal maladies hitting at one time, some cases delivering additive impacts. Initiatives including development wild assessment pesticide toxicity undertaken efforts ameliorate declines. In this review, recent findings regarding impact these strategies mitigating them discussed.

Language: Английский

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Human dimensions of insect pollinator conservation

Current Opinion in Insect Science, Journal Year: 2020, Volume and Issue: 38, P. 107 - 114

Published: April 1, 2020

Language: Английский

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Quantifying nectar production by flowering plants in urban and rural landscapes

Journal of Ecology, Journal Year: 2021, Volume and Issue: 109(4), P. 1747 - 1757

Published: Jan. 26, 2021

Abstract Floral resources (nectar and pollen) provide food for insect pollinators but have declined in the countryside due to land use change. Given widespread pollinator loss, it is important that we quantify their supply help develop conservation actions. While nectar been measured rural landscapes, equivalent data are lacking urban areas, an knowledge gap as towns cities often host diverse populations. We quantified of farmland nature reserves UK by combining floral abundance sugar production 536 flowering plant taxa, allowing us compare landscape types assess spatial distribution among uses within cities. The magnitude did not differ significantly three landscapes. In areas was more origin predominantly delivered non‐native plants. Within cities, varied greatly production. Gardens provided most per unit area 85% all at a city scale, while gardens allotments produced supplies sugar. abundance, commonly used proxy pollinators’ supply, correlated strongly with resources, left substantial proportion variation unexplained. Synthesis . show hotspots resource diversity rather than quantity underpinned contribution residential gardens. Individual gardeners role play ornamental plants, usually origin, key source

Language: Английский

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Indigenous plants promote insect biodiversity in urban greenspaces

Ecological Applications, Journal Year: 2021, Volume and Issue: 31(4)

Published: Feb. 21, 2021

Abstract The contribution of urban greenspaces to support biodiversity and provide benefits for people is increasingly recognized. However, ongoing management practices favor vegetation oversimplification, often limiting lawns tree canopy rather than multi‐layered that includes under‐ midstorey, the use nonnative species. These hinder potential sustain indigenous biodiversity, particularly taxa like insects rely on plants food habitat. Yet, little known about which plant species may maximize positive outcomes taxonomically functionally diverse insect communities in greenspaces. Additionally, while cities are expected experience high rates introductions, quantitative assessments relative occupancy vs. introduced greenspace rare, hindering understanding how promote establishment insects. Using a hierarchically replicated study design across 15 public parks, we recorded occurrence data from 552 133 species, differing planting element (lawn, canopy), midstorey growth form (forbs, lilioids, graminoids, shrubs) origin (nonnative, native, indigenous), assess (1) contributions (2) sustained highest number We found community was overwhelmingly composed Our findings further highlight core role sustaining areas, with representing key elements maintain rich communities. Intriguingly, graminoids supported richness all studied forms by groups. work highlights opportunity presented understory plants, our area provides blueprint stimulus architects, engineers, developers, designers, planners incorporate into their practice palettes foster larger presence over regionally native or incorporating broader mixture forms.

Language: Английский

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Diverse urban pollinators and where to find them

Biological Conservation, Journal Year: 2023, Volume and Issue: 281, P. 110036 - 110036

Published: April 3, 2023

Language: Английский

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Native and exotic plants play different roles in urban pollination networks across seasons

Oecologia, Journal Year: 2023, Volume and Issue: 201(2), P. 525 - 536

Published: Jan. 24, 2023

Urban areas often host exotic plant species, whether managed or spontaneous. These plants are suspected of affecting pollinator diversity and the structure pollination networks. However, in dense cityscapes, also provide additional flower resources during periods scarcity, consequences for seasonal dynamics networks still need to be investigated. For two consecutive years, we monitored monthly plant-pollinator 12 green spaces Paris, France. We focused on variations availability attractiveness resources, comparing native at both species community levels. considered their respective contributions network properties over time (specialization nestedness). Exotic provided more abundant diverse than plants, especially from late summer on. received visits attracted level; certain times year level as well. were involved generalist interactions, increasingly so seasons. In addition, they contributed nestedness plants. results show that major components interactions a urban landscape, even though less attractive natives. They constitute core increase can participate overall stability network. most seldom visited by insects. Pollinator communities may benefit including when managing spaces.

Language: Английский

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Land Use Change Consistently Reduces α‐ But Not β‐ and γ‐Diversity of Bees

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(1)

Published: Jan. 1, 2025

ABSTRACT Land use change threatens global biodiversity and compromises ecosystem functions, including pollination food production. Reduced taxonomic α‐diversity is often reported under land change, yet the impacts could be different at larger spatial scales (i.e., γ‐diversity), either due to reduced β‐diversity amplifying diversity loss or increased dampening loss. Additionally, studies focus on diversity, while other important components, phylogenetic can exhibit differential responses. Here, we evaluated how agricultural urban alters α‐, β‐, γ‐diversity of an pollinator taxon—bees. Using a multicontinental dataset 3117 bee assemblages from 157 studies, found that was by 16%–18% in both habitats relative natural habitats. Phylogenetic decreased 11%–12% Compared with habitats, 11% 6% respectively, but exhibited no systematic We detected 22% decline 17% not significantly These findings highlight threat expansions large‐scale decline. In addition, urbanization agriculture lead consistent declines α‐diversity, their β‐ vary, highlighting need study effects multiple scales.

Language: Английский

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A case for assemblage-level conservation to address the biodiversity crisis

Published: Jan. 20, 2025

Language: Английский

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Beyond the Decline of Wild Bees: Optimizing Conservation Measures and Bringing Together the Actors

Insects, Journal Year: 2020, Volume and Issue: 11(9), P. 649 - 649

Published: Sept. 22, 2020

Wild bees are facing a global decline mostly induced by numerous human factors for the last decades. In parallel, public interest their conservation increased considerably, namely through scientific studies relayed in media. spite of this broad interest, lack knowledge and understanding subject is blatant reveals gap between awareness understanding. While extensively studied, information on measures often scattered literature. We now beyond precautionary principle experts calling effective actions to promote wild bee diversity enhancement environment quality. review, we draw general up-to-date assessment methods, as well efficiency current projects that try fill gaps optimize measures. Targeting bees, focused our attention (i) protection restoration habitats, (ii) anthropogenic (iii) implementation made tools, (iv) how deal with invasive alien species, finally (v) communicate efficiently accurately. This review can be considered needed catalyst implement concrete qualitative conversation bees.

Language: Английский

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