Time since establishment drives bee and hoverfly diversity, abundance of crop-pollinating bees and aphidophagous hoverflies in perennial wildflower strips

Basic and Applied Ecology, Journal Year: 2021, Volume and Issue: 57, P. 102 - 114

Published: Oct. 29, 2021

Wildflower strips (WFS) are amongst the most commonly applied measures to promote pollinators and natural enemies of crop pests in agroecosystems. Their potential enhance these functionally important insect groups may vary substantially with time since establishment WFS. However, knowledge on their temporal dynamics remains scarce, hampering recommendations for optimized design management. We therefore examined taxonomic functional bees hoverflies perennial WFS ranging from one ≥6 years sowing a standardized species-rich seed mixture flowering plants 18 agricultural landscapes Switzerland. The abundance wild bees, honeybees declined after second year by 89%, 62% 72%, respectively. Declines bee hoverfly species richness were linear those aphidophagous exponential, while peaked third year. over generally paralleled decreases flower (-83%) (-61%) an increase grass cover (+70%) Flowering plant showed strong positive relationships dominant crop-visiting hoverflies. Furthermore, but not hoverflies, positively related proportion (semi-)open semi-natural habitat surrounding landscape (500 m radius), negatively forest. conclude that effectiveness pollinator diversity, crop-pollinating through foraging resources first two three years, probably due decline diverse abundant floral resources. Although older still provide valuable nesting overwintering opportunities enemies, our findings indicate regular re-sowing be necessary maintain adequate resource provisioning effective conservation promotion pollination pest control services landscapes.

Language: Английский

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Landscape heterogeneity and forest cover shape cavity-nesting hymenopteran communities in a multi-scale perspective

Basic and Applied Ecology, Journal Year: 2021, Volume and Issue: 56, P. 239 - 249

Published: Aug. 8, 2021

Language: Английский

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A review of management actions on insect pollinators on public lands in the United States

Biodiversity and Conservation, Journal Year: 2022, Volume and Issue: 31(8-9), P. 1995 - 2016

Published: March 2, 2022

Language: Английский

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Soil moisture affects plant–pollinator interactions in an annual flowering plant

Philosophical Transactions of the Royal Society B Biological Sciences, Journal Year: 2022, Volume and Issue: 377(1853)

Published: May 2, 2022

Many environmental factors impact plant and pollinator communities. However, variation in soil moisture how it mediates the plant–pollinator interactions has yet to be elucidated. We hypothesized that long-term can exert a strong selective pressure on floral vegetative traits of plants, leading changes visitation. demonstrated there are three phenotypic populations Gentiana aristata our study alpine region Qinghai-Tibetan Plateau vary colour other traits. Pink (dry habitat) blue (intermediate flower visited primarily by bumblebees, white (wet flies. These patterns visitation driven constant when non-endemic plants placed intermediate habitats. Additionally, communities different habitats vary, with more insect-pollinated forbs dry versus wet Through common garden reciprocal transplant experiment, we growth traits, attractiveness seed production highest population is raised its endemic habitat. This suggests these have evolved associated habitat differences. article part theme issue ‘Natural processes influencing health: from chemistry landscapes’.

Language: Английский

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Life-history traits predict responses of wild bees to climate variation

Proceedings of the Royal Society B Biological Sciences, Journal Year: 2022, Volume and Issue: 289(1973)

Published: April 20, 2022

Life-history traits, which are physical traits or behaviours that affect growth, survivorship and reproduction, could play an important role in how well organisms respond to environmental change. By looking for trait-based responses within groups, we can gain a mechanistic understanding of why change might favour penalize certain species over others. We monitored the abundance at least 154 bee 8 consecutive years subalpine region Rocky Mountains ask whether bees differently changes abiotic conditions based on their life-history traits. found comb-building cavity nesters larger bodied declined relative with increasing temperatures, while smaller, soil-nesting increased. Further, narrower diet breadths increased decreased rainfall. Finally, reduced snowpack was associated overwintered as prepupae whereas adults abundance, suggesting overwintering body size, lipid content survival. Taken together, our results show climate may reshape pollinator communities, others declining, potentially leading novel plant–pollinator interactions plant reproduction.

Language: Английский

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