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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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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Trap nests for bees and wasps to analyse trophic interactions in changing environments—A systematic overview and user guide

Methods in Ecology and Evolution, Journal Year: 2018, Volume and Issue: 9(11), P. 2226 - 2239

Published: July 26, 2018

Abstract Trap nests are artificially made nesting resources for solitary cavity‐nesting bees and wasps allow easy quantification of multiple trophic interactions between bees, wasps, their food objects natural enemies. We synthesized all trap nest studies available in the ISI Web Science ™ to provide a comprehensive overview research identify common practical challenges promising future directions. have been used on continents across climate zones publication numbers increased exponentially since first 1950s. Originally detailed exploratory history observations, now also an established method hypothesis‐driven ecology assess environmental changes. potential monitoring by assessing interaction networks groups involved. While pollen collection or prey hunting has often addressed, with enemies were included almost half publications, surprisingly few quantified response anthropogenic By simultaneously revealing multitude interactions, broaden our understanding how species influenced manifold changes, which pressing topics ecological research. To foster use studies, we offer guidance solutions.

Language: Английский

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Unveiling the contribution of bee pollinators to Brazilian crops with implications for bee management

Apidologie, Journal Year: 2020, Volume and Issue: 51(3), P. 406 - 421

Published: Jan. 22, 2020

Language: Английский

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Mitigating the Effects of Habitat Loss on Solitary Bees in Agricultural Ecosystems

Agriculture, Journal Year: 2020, Volume and Issue: 10(4), P. 115 - 115

Published: April 5, 2020

Solitary bees and other wild pollinators provide an important ecosystem service which can benefit both the agricultural economy sustainability of many native ecosystems. Many solitary bees, however, are experiencing decreases in their populations ranges, resulting overall loss pollinator species richness areas. Several interacting factors have been implicated this decline, including increased pesticide use, climate change, pathogens, but habitat remains one primary drivers. The widespread conversion natural habitats into landscapes has decreased availability adequate nesting sites floral diversity for bee species. Large monocultures with intensive production systems often cannot support (particularly short foraging ranges) necessary to ensure pollination animal-pollinated crops. Diversifying through incorporation wildflower plantings, as well preservation remaining habitats, may offer a solution, it shown increase abundance nearby In review article, we discuss various effects on different ways mitigate such order conserve landscapes.

Language: Английский

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A dual role for farmlands: food security and pollinator conservation

Journal of Ecology, Journal Year: 2017, Volume and Issue: 105(4), P. 890 - 899

Published: June 19, 2017

Summary We briefly review current understanding of wild pollinators and pollination services on farmlands. consider how concepts in plant ecology – community assembly functional trait diversity ‐ may be applied to create diverse, pollinator communities across scales agroecosystems. also make recommendations for best practices enhance more sustainable food production systems under changing environmental conditions, including creating greater landscape connectivity, embracing dynamics, providing incentives other motivations support these practices. Synthesis . highlight the opportunity agricultural lands serve a dual role both conservation, conclude by posing unanswered questions top priorities future studies.

Language: Английский

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Contrasting effects of vineyard type, soil and landscape factors on ground‐ versus above‐ground‐nesting bees

Journal of Applied Ecology, Journal Year: 2023, Volume and Issue: 60(4), P. 601 - 613

Published: Jan. 7, 2023

Abstract Agricultural intensification and abandonment of traditional agricultural practices are main drivers current insect declines. The resulting loss feeding nesting opportunities has led to a decrease in pollinator populations like wild bees. While the restoration floral resources been widely implemented bee conservation, resources, particularly for ground‐nesting species, barely considered. We assessed diversity wine‐growing area Germany 15 study sites along soil gradient evaluated whether bees were distinctly affected by different vineyard types (vertically oriented, terraced, abandoned), local conditions (e.g. shrub flower cover) landscape factors response divergent needs (above‐ground vs. ground‐nesting). found that responded more strongly availability than resources. determined suitability aspects irrespective management types, above‐ground‐nesting profited from encroachment fallows enhanced semi‐natural habitats (SNHs) surrounding landscape. In contrast, resource managed vineyards had only marginal effects on Synthesis applications : Life‐history traits strategies have long neglected conservation approaches, but proved be highly relevant, especially For this, agri‐environmental schemes can no longer solely focus should equally address Therefore, efforts enhancing landscapes aim at complementing exposed bare ground patches) woody elements, hedges) addition At level, conserving heterogeneous mixture actively elements is significant maintain diverse communities.

Language: Английский

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Low‐intensity management benefits solitary bees in olive groves

Journal of Applied Ecology, Journal Year: 2019, Volume and Issue: 57(1), P. 111 - 120

Published: Sept. 20, 2019

Abstract One of the current challenges for applied ecologists is to understand how manage/restore agroecosystems in a sustainable and cost‐effective way. The intermediate landscape complexity hypothesis (ILCH) predicts that effectiveness agri‐environmental measures (AES) on biodiversity ecosystem services recovery often largest landscapes complexity. This has rarely been tested savanna‐like permanent agroecosystems. Focusing pollinators, we test ILCH at regional scale Mediterranean olive orchards, one most important world. We inferred abundance cavity‐nesting pollinators 40 paired orchards (extensively vs. intensively managed herbaceous cover) 20 localities selected across gradient. also studied different magnitudes local management switches may affect by considering organic intensive fields as extremes orchards. used 208 trap nests solitary bees measure colonization rates. Additionally, conducted pollinator surveys ascertain rate was representative proxy activity. Our results showed (a) changes rates due herb cover peaked complexity, with extensively rendering higher (b) Organic had than their control farms regardless (c) There highly significant correlation between nest density foraging flowers, which suggests good estimator Policy implications . maintenance ground (main orchards) investment allowing recuperation when targeting located fostering farming (still minority groves) conservation should be priority policymakers since its effects are beneficial any landscape.

Language: Английский

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Bees: How and Why to Sample Them

Springer eBooks, Journal Year: 2020, Volume and Issue: unknown, P. 55 - 83

Published: Nov. 11, 2020

Language: Английский

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