ORCID Profile
0000-0001-6989-8427
Current Organisations
University of Oxford
,
Comisión Nacional para el Conocimiento y Uso de la Biodiversidad, Gobierno de México
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Publications
Novel pollen analogue technique shows bumblebees display low floral constancy and prefer sites with high floral diversity
Publisher: Springer Science and Business Media LLC
Date: 30-07-2021
DOI: 10.1007/S10980-021-01304-9
Abstract: There have been dramatic global declines in pollinating insects. A common land management intervention to support wild pollinators is to plant non-crop flowering plants (‘pollinator planting’). However, there are limited data on which species or spatial arrangement of planting provide maximum benefit to wild pollinators. Here we investigate which flowering species and locations are visited by free-foraging Bombus terrestris (buff-tailed bumblebees) in species-rich semi-natural grassland and woodland. Two study nests of buff-tailed bumblebees were established in Wytham Woods, UK. Pollen analogue pigments were sprayed on open flowers in the study area over a period of two months, with unique colours used to identify separate sections of the study area. Pollen load analysis was used to identify forage species and foraging locations. Bumblebees showed low flower constancy, visiting five flower species per trip on average, and as a group the s led bumblebees visited 36 of the 49 plant species identified in study area surveys. Many in iduals foraged in multiple, spatially-discrete locations during single trips. The positive relationship between floral ersity and pollen load species ersity, and the positive relationship between site floral ersity and frequency of visitation, suggest behavioural strategies that maximize the ersity of flower species visited, in line with the energetic costs and benefits hypothesis . This supports recommendations for pollinator plantings with high species ersity, potentially spread across many small forage areas across the landscape.
Insect community structure covaries with host plant chemistry but is not affected by prior herbivory
Publisher: Wiley
Date: 17-05-2019
DOI: 10.1002/ECY.2739
Abstract: By feeding on plant tissue, insect herbivores can change several characteristics of their hosts. These changes have the potential to alter the quality of the plant for other herbivore species, potentially altering the structure of the community of species attacking the plant at a later point in time. We tested whether herbivory early in the season changes host plant performance, polyphenol chemistry, and the community structure of sessile herbivores later in the season. We experimentally manipulated densities of early-season moth caterpillars on a set of young oak trees and measured tree growth, reproduction, leaf chemistry, and the abundance and community composition of leafmining and galling species later in the season. The experimental manipulations of early-season herbivores did not affect late-season leaf chemistry or tree performance. Early-season herbivores had a weak negative effect on the abundance of gallers and a positive, tree-dependent effect on the overall ersity of late-season sessile herbivores. The chemical composition of leaves covaried with the species composition of the late-season leafmining and galling community. Both the chemical composition of the host tree and the late-season insect community structure were strongly affected by the growth location of the tree. Our results suggest that plant-mediated indirect effects between herbivores might play a limited role in this system, whereas the underlying variation in plant chemistry is an important factor structuring the associated insect community. Our results emphasize that factors other than prior herbivory can be important determinants of plant chemistry and the community composition of herbivores.
More than the usual suspect: diversity of pollinators of chayote (Sechium edule) at high elevations in Chiapas, Mexico
Publisher: Springer Science and Business Media LLC
Date: 19-11-2021
Related Organisations
University Of Oxford
Location: United Kingdom of Great Britain and Northern Ireland
Comisión Nacional Para El Conocimiento Y Uso De La Biodiversidad, Gobierno De México
Location: Mexico
Related Funding Activities
No related grants have been discovered for Angélica Elizabeth Martínez-Bauer.