Opportunities and threats for pollinator conservation in global towns and cities

Current Opinion in Insect Science, Journal Year: 2020, Volume and Issue: 38, P. 63 - 71

Published: Jan. 28, 2020

Urban expansion is considered to be one of the main threats global biodiversity yet some pollinator groups, particularly bees, can do well in urban areas. Recent studies indicate that both local and landscape-level drivers influence communities, with floral resources amount impervious cover landscape affecting abundance, richness community composition. intensification, chemicals, climate change increased honey bee colony densities all negatively affect pollinators. Maintaining good areas habitat for pollinators, such as those found allotments (community gardens) domestic gardens, improving management approaches greenspace highly urbanised (e.g. by increasing nesting sites) will benefit conservation. Opportunities conservation exist via multiple stakeholders including policymakers, residents, planners architects.

Language: Английский

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Massively Introduced Managed Species and Their Consequences for Plant–Pollinator Interactions

Advances in ecological research/Advances in Ecological Research, Journal Year: 2017, Volume and Issue: unknown, P. 147 - 199

Published: Jan. 1, 2017

Language: Английский

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Nesting habitat of ground‐nesting bees: a review

Ecological Entomology, Journal Year: 2020, Volume and Issue: 46(2), P. 143 - 159

Published: Nov. 26, 2020

About 3/4 of all wild bee species nest in the soil and spend much their life cycle underground. These insects require suitable environmental conditions for construction development survival offspring. However, there is little quantitative information on nesting habitat requirements preferences ground‐nesting bees. Moreover, are almost no data effects these bees' fitness. Here, to better understand factors that influence nest‐site selection bees, we synthesise literature nesting‐habitat associations important pollinators. We also review techniques can be used study Our reveals enormous variation among with such attributes as texture, compaction, moisture, temperature, ground surface features, proximity conspecifics or floral resources. more studies—particularly experimental ones—are needed segregate each factor choices location, since multiple often correlated. It unclear whether vary geographically seasonally within species, phylogenetically partly because lack many species. argue studies using established habitat‐selection methods essential properly identify Finally, research ecology (especially agroecosystems) determine how best support this diverse group bees vital ecosystem service they provide.

Language: Английский

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The relative performance of sampling methods for native bees: an empirical test and review of the literature

Ecosphere, Journal Year: 2020, Volume and Issue: 11(5)

Published: May 1, 2020

Abstract Many bee species are declining globally, but to detect trends and monitor assemblages, robust sampling methods required. Numerous used, a critical review of their relative effectiveness is lacking. Moreover, evidence suggests the depends on habitat, yet efficacy in urban areas has be evaluated. This study compared community documented using observational records, targeted netting, mobile gardens, pan traps (blue yellow), vane trap‐nests. The comparative surveys native bees honeybees were undertaken an urbanized region southwest Australian biodiversity hot spot. outcomes then synthesis based comprehensive literature studies where two or more conducted. Observational records far exceeded all other terms abundance recorded, unable distinguish finer taxonomic levels. Of that captured individuals, thereby permitting identification, sweep netting vastly outperformed passive methods, yielding total 1324 representing 131 units—even when deployed over shorter duration. each method differed according taxon. From analysis literature, there was high variability blue tended most effective, accordance with results from this study. However, present previous extremely low catch rates traps. Species trap‐nests represented only subset potential cavity‐nesters, abundances those field. Mobile gardens relatively ineffective at attracting bees. For habitat within spot, indispensable for obtaining indication assemblages; alone recorded small fraction community. Overall, combination should used communities, as own biases, certain taxa well some poorly others.

Language: Английский

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Influence of Nesting Characteristics on Health of Wild Bee Communities

Annual Review of Entomology, Journal Year: 2020, Volume and Issue: 65(1), P. 39 - 56

Published: Jan. 7, 2020

Nest site availability and quality are important for maintaining robust populations communities of wild bees. However, most species, nesting traits nest conditions poorly known, limiting both our understanding basic ecology bee species conservation efforts. Additionally, many the threats commonly associated with reducing have effects that can extend into nests but largely unstudied. In general, such as habitat disturbances climate change likely affect conditions, which in turn initiation, growth, development, overwintering success To facilitate a better how these other may bees, this review, I quantify key environmental then consider intersect observed anticipated changes experienced by These data suggest common to bees through strongly influence their survival persistence vastly understudied. Increasing research biology incorporating information efforts help improve declining critical group.

Language: Английский

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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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The proportion of impervious surfaces at the landscape scale structures wild bee assemblages in a densely populated region

Ecology and Evolution, Journal Year: 2016, Volume and Issue: 6(18), P. 6599 - 6615

Published: Aug. 25, 2016

Abstract Given the predicted expansion of cities throughout world, understanding effect urbanization on bee fauna is a major issue for conservation bees. The aim this study was to understand how affects wild assemblages along gradient impervious surfaces and determine influence landscape composition floral resource availability these assemblages. We chose 12 sites with proportion (soil covered by parking, roads, buildings) ranging from 0.06% 64.31% within 500 m radius. collected using pan trapping estimated radius species richness plant 200 1104 bees 74 species. at scale had negative abundance richness, whereas local flower no effect. Ground‐nesting were particularly sensitive gradient. This provides new evidences impact emerged as key factor that drives those

Language: Английский

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Planting gardens to support insect pollinators

Conservation Biology, Journal Year: 2018, Volume and Issue: 34(1), P. 15 - 25

Published: Dec. 29, 2018

Abstract Global insect pollinator declines have prompted habitat restoration efforts, including pollinator‐friendly gardening. Gardens can provide nectar and pollen for adult insects offer reproductive resources, such as nesting sites caterpillar host plants. We conducted a review meta‐analysis to examine how decisions made by gardeners on plant selection garden maintenance influence survival, abundance, diversity. also considered characteristics of surrounding landscapes the impacts natural enemies. Our results indicated that pollinators responded positively high species diversity, woody vegetation, size, sun exposure negatively separation habitats from sites. Within‐garden features more strongly influenced than landscape factors. Growing interest in gardening highlights need better understand gardens contribute conservation some enhance attractiveness usefulness pollinators. Further studies examining reproduction, resource acquisition, enemies comparing with other efforts are needed increase value human‐made

Language: Английский

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Cavity-nest boxes for solitary bees: a century of design and research

Apidologie, Journal Year: 2016, Volume and Issue: 48(3), P. 311 - 327

Published: Oct. 31, 2016

Language: Английский

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Orchid conservation: from theory to practice

Annals of Botany, Journal Year: 2020, Volume and Issue: 126(3), P. 345 - 362

Published: May 7, 2020

Given the exceptional diversity of orchids (26 000+ species), improving strategies for conservation will benefit a vast number taxa. Furthermore, with rapidly increasing numbers endangered and low success rates in orchid translocation programmes worldwide, it is evident that our progress understanding biology not yet translating into widespread effective conservation.

Language: Английский

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