Impact of tillage on the crop pollinating, ground-nesting bee, Peponapis pruinosa in California

Ullmann, Katharina; Meisner, Matthew H.; Williams, Neal M.

doi:10.1016/j.agee.2016.08.002

Cited by 65 publications

(63 citation statements)

References 47 publications

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“…Management practices like crop rotation, pesticide application and tillage prevent fields from supporting most pollinator populations (Ullmann et al . ). Only subset of the wild bees in the landscape have been observed visiting mass‐flowering crops (e.g.…”

Section: Methodsmentioning

confidence: 97%

Proximity of restored hedgerows interacts with local floral diversity and species' traits to shape long‐term pollinator metacommunity dynamics

et al. 2019

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Disconnected habitat fragments are poor at supporting population and community persistence; restoration ecologists, therefore, advocate for the establishment of habitat networks across landscapes. Few empirical studies, however, have considered how networks of restored habitat patches affect metacommunity dynamics. Here, using a 10‐year study on restored hedgerows and unrestored field margins within an intensive agricultural landscape, we integrate occupancy modelling with network theory to examine the interaction between local and landscape characteristics, habitat selection and dispersal in shaping pollinator metacommunity dynamics. We show that surrounding hedgerows and remnant habitat patches interact with the local floral diversity, bee diet breadth and bee body size to influence site occupancy, via colonisation and persistence dynamics. Florally diverse sites and generalist, small‐bodied species are most important for maintaining metacommunity connectivity. By providing the first in‐depth assessment of how a network of restored habitat influences long‐term population dynamics, we confirm the conservation benefit of hedgerows for pollinator populations and demonstrate the importance of restoring and maintaining habitat networks within an inhospitable matrix.

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Section: Methodsmentioning

confidence: 97%

Proximity of restored hedgerows interacts with local floral diversity and species' traits to shape long‐term pollinator metacommunity dynamics

et al. 2019

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“…; Cane & Neff ; Roulston & Goodell ; Ullmann et al . ). Besides through its direct effect on the soil, sustained tillage coupled with herbicide use reduce the availability of weeds that provide in‐field floral resources for pollinators.…”

Section: Land Management To Increase Local Nesting and Foraging Resoumentioning

confidence: 97%

“…No-till significantly increases rain-fed crop productivity in dry climates (Pittelkow et al 2015). There is still no strong evidence for a positive effect of no-till farming on ground-nesting pollinator species (Shuler et al 2005), although this has often been proposed, since many species place their brood cells < 30 cm below the surface (Williams et al 2010;Cane & Neff 2011;Roulston & Goodell 2011;Ullmann et al 2016). Besides through its direct effect on the soil, sustained tillage coupled with herbicide use reduce the availability of weeds that provide in-field floral resources for pollinators.…”

Section: Crop Fieldsmentioning

confidence: 99%

Ecological intensification to mitigate impacts of conventional intensive land use on pollinators and pollination

et al. 2017

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Worldwide, human appropriation of ecosystems is disrupting plant-pollinator communities and pollination function through habitat conversion and landscape homogenisation. Conversion to agriculture is destroying and degrading semi-natural ecosystems while conventional land-use intensification (e.g. industrial management of large-scale monocultures with high chemical inputs) homogenises landscape structure and quality. Together, these anthropogenic processes reduce the connectivity of populations and erode floral and nesting resources to undermine pollinator abundance and diversity, and ultimately pollination services. Ecological intensification of agriculture represents a strategic alternative to ameliorate these drivers of pollinator decline while supporting sustainable food production, by promoting biodiversity beneficial to agricultural production through management practices such as intercropping, crop rotations, farm-level diversification and reduced agrochemical use. We critically evaluate its potential to address and reverse the land use and management trends currently degrading pollinator communities and potentially causing widespread pollination deficits. We find that many of the practices that constitute ecological intensification can contribute to mitigating the drivers of pollinator decline. Our findings support ecological intensification as a solution to pollinator declines, and we discuss ways to promote it in agricultural policy and practice.

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“…Agricultural intensity was a descriptor used to group studies that evaluated the response of bee richness or abundance in intensive farming systems (e.g., tillage, insecticide, and fertilizer use). One example can be seen in Ullmann et al (2016). These authors sampled ground nesting bees in areas where shallow tilling occurs regularly in row crop fields irrigated with buried drip lines.…”

Section: Grouping the Data For Meta-analysis: Landscape And Habitat Dmentioning

confidence: 99%

The influence of local and landscape scale on single response traits in bees: A meta-analysis

Coutinho

Garibaldi

Viana

2018

Agriculture, Ecosystems & Environment

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Assessments of environmental drivers that regulate the functional composition of various organisms have become more frequent in the ecological literature, as this approach establishes a more direct connection between community structure and ecosystem functions. Bee response traits, such as sociality, body size, nest location, nest behaviour, and dietary specialization, have been reported in empirical studies that examine the role of land use intensity in functional diversity. However, empirical studies include different descriptors measured at different spatial scales, producing poor generalizations. Processes operating at different scales may have different effects depending on the response traits considered in the analysis. In this meta-analysis, we provide a quantitative assessment of the role that the structural complexity of habitats at local and landscape scales plays in the richness and abundance patterns of bees, considering different response traits. As indicated through this metaanalysis, the descriptors of structural complexity at the local scale explained more of the richness and abundance of bees with distinct response traits than the descriptors at the landscape scale. In addition, high management intensity has a negative effect on the different response traits. Below-ground nesting bees and social bees showed different abundance trends, which suggest a mechanism denominated 'response diversity'. This result suggests that the adoption of hybrid management strategies at the local scale could support the richness and abundance of different bees with distinct response traits in agroecosystems. These distinct response traits can be an important ecological pattern that contributes to the development of management strategies that maintain, in space and time, bees with distinct response traits. However, we should analyse the communities in terms of clusters of response traits, considering the possible synergies and trade-offs between these traits.

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Impact of tillage on the crop pollinating, ground-nesting bee, Peponapis pruinosa in California

Cited by 65 publications

References 47 publications

Proximity of restored hedgerows interacts with local floral diversity and species' traits to shape long‐term pollinator metacommunity dynamics

Proximity of restored hedgerows interacts with local floral diversity and species' traits to shape long‐term pollinator metacommunity dynamics

Ecological intensification to mitigate impacts of conventional intensive land use on pollinators and pollination

The influence of local and landscape scale on single response traits in bees: A meta-analysis

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