Floral resource availability from groundcover promotes bee abundance in coffee agroecosystems

Fisher, Kenneth C.; Gonthier, David J.; Ennis, Katherine K.; Perfecto, Ivette

doi:10.1002/eap.1568

Cited by 29 publications

(22 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The α‐diversity significantly declined with elevation and could be well explained by an interplay of the α‐diversity of floral resources and MAT, which both had a positive effect ( R 2 = 73%). This finding corroborates previous studies on bees and cavity‐nesting hymenopterans, which found close associations of species richness with temperature and the availability of floral resources (Abrahamczyk et al, 2011; Classen et al, 2015; Ebeling et al, 2008; Escobedo‐Kenefic et al, 2020; Fisher et al, 2017; Mayr et al, 2020; Potts et al, 2003). The positive effect of MAT on species richness can be explained by higher metabolic rates of ectothermic organisms under high temperature, fostering net energy intake, and population growth (Brown et al, 2004; Classen et al, 2015; Savage et al, 2004).…”

Section: Discussionsupporting

confidence: 91%

Floral turnover and climate drive seasonal bee diversity along a tropical elevation gradient

et al. 2022

View full text Add to dashboard Cite

The contribution of seasonality in species communities to elevational diversity of tropical insects remains poorly understood. We here assessed seasonal patterns and drivers of bee diversity in the Eastern Afromontane Biodiversity Hotspot, Kenya, to understand the contribution of seasonality to elevational biodiversity patterns. Bee species and plant species visited by bees were recorded on 50 study plots in regrowth vegetation across four major seasons along two elevation gradients from 525 to 2530 m above sea level. Bees were sampled by transect walks using sweep nets and aspirators. We examined how local species richness (α-diversity) and seasonal changes in local species communities (β-diversity) contribute to species richness across seasons (γ-diversity) along elevation gradients. Using a multimodel inference framework, we identified the contribution of climate and floral seasonality to elevational patterns in bee diversity. We found that both αand γ-diversity decreased with elevation. Seasonal β-diversity decreased with elevation and the high turnover of species across seasons contributed to a considerably higher γthan α-diversity on study plots. A combination of seasonality in climate and the seasonal turnover of floral resources best explained the seasonality in bee species communities (seasonal β-diversity). We, therefore, conclude that, despite the more stable, and favorable climatic conditions in the tropics (in comparison to temperate regions), climatic seasonality and its influence on bees' floral resources largely determined seasonal patterns of bee species diversity along elevation gradients on tropical mountains.

show abstract

Section: Discussionsupporting

confidence: 91%

Floral turnover and climate drive seasonal bee diversity along a tropical elevation gradient

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Floral resources at each site (i.e., the total number of flowers) was estimated in sampling plots by using six randomly placed quadrats 1 m x 1 m (covering a proportion of sampling area similar to that reported in Fisher et al, 2017) and summing the number of flowers found within each quadrat.…”

Section: Landscape and Environmental Variablesmentioning

confidence: 99%

“…(https://www.arpalombardia.it/Pages/Aria/qualita-aria.aspx). A map reporting the location of monitoring stations along the investigated landscape is provided in Online resources, FigureS1.An expeditive estimation of floral resources at each site (i.e., the total number of flowers) was performed by using six quadrats 1 m x 1 m (covering a proportion of sampling area similar to that reported inFisher et al, 2017) randomly placed in the flowering green spaces within or closest to the sampling area, and counted the number of flowers found there (as inUshimaru 2014). Flowers were counted considering single or composed inflorescences as units: for Myosotis sp., Galium sp., and Capsella bursa-pastoris, and all Asteraceae the number of inflorescences was counted.…”

mentioning

confidence: 99%

Effect of urbanization and its environmental stressors on the intraspecific variation of flight functional traits in two bumblebee species

Tommasi

Pioltelli

Biella

et al. 2021

Preprint

View full text Add to dashboard Cite

Landscape anthropization replaces natural areas with either agricultural or urban covers, leading to land-use intensification. This worldwide phenomenon affects biodiversity, but little is known about the effects on the intraspecific variation of functional traits in spite of their importance for ecosystem functioning and services.Here we investigated if the functional traits of pollinator insects responded to land-use intensification and environmental stressors, by characterizing the variation of important traits for flight performance that are also indicators of stressors during organism development. The possible impact of different land cover (i.e. semi-natural, urban and agricultural) and of multiple biotic and abiotic stressors (i.e. temperature, resource availability and air pollutants) was investigated.Along a gradient of landscape anthropization, we quantified the impact of biotic and abiotic factors on two European bumblebee species (Bombus terrestris and B. pascuorum) sampled at 37 sites in Northern Italy. Through geometric morphometrics we investigated the variation of multiple morphological traits, namely wing centroid size (as a proxy of body size) and asymmetry of wing shape and size. Data on land-cover, climatic conditions and air pollutants were retrieved through remote sensing, while the estimation of resource availability was conducted directly in the field.Our results highlighted the relevance of the two main land-use alteration trajectories (i.e. urbanization and agriculture intensification), although the two species responded idiosyncratically. Urbanization led to shifts towards smaller body sizes due to increased impervious cover and air temperature in B. pascuorum. Instead, B. terrestris responded to agriculture intensification with larger body size in response to higher farmland cover and floral resource availability. Asymmetry in wing shape was not affected by abiotic factors of land-use intensification, but wing size asymmetry was positively associated with warmer temperatures and increased level of NO2 in B. terrestris.This study describes patterns of how landscape anthropization shapes pollinator insects’ functional traits: urbanization is associated with smaller bees, while agriculture intensification leads to larger bees. In addition, environmental stressors impacted wing size asymmetries and could compromise flight performance, particularly in warmer, more polluted habitats. This study indicates that the land-use intensification of anthropized landscapes determines functional trait variation at the intraspecific level and that these responses are highly taxon-specific even in syntopic related organisms.

show abstract

“…The absence of density effects could be due to the low number of pollinators within the study site and its influence on visitation rates (Field et al 2005). The study site was a woodland and the abundance of (Grundel et al 2010, Fisher et al 2017. It should be noted that our design involved only four high-density plots, which may have limited our ability to detect an effect of orchid density on pollinator abundance and behaviour.…”

Section: Foraging Behaviour Of Potential Pollinatorsmentioning

confidence: 99%

Do local conspecific density and floral display size influence fruit set via pollinator visitation in Orchis militaris?

Henneresse

Kaiser

Wesselingh

et al. 2019

Nordic Journal of Botany

View full text Add to dashboard Cite

Plant density varies naturally, from isolated plants to clumped individuals, and this can influence pollinator foraging behaviour and plant reproductive success. In addition, the effect of conspecific density on reproduction may depend on the pollination system, and deceptive species differ from rewarding ones in this regard, a high density being often associated with low fruit set in deceptive plants. In our study, we aimed to determine how local conspecific density and floral display size (i.e. number of flowers per plant) affect fruit set in a deceptive orchid (Orchis militaris) through changes in pollinator visitation. We measured fruit set in a natural population and recorded pollinator abundance and foraging behaviour within plots of different O. militaris densities. Detailed data were recorded for the most abundant potential pollinators of O. militaris, i.e. solitary bees. Floral display size was negatively correlated to fruit set in medium‐density plots, but uncorrelated in low‐ and high‐density plots. Plot density had no effect on solitary bee abundance and visitation, which may be due to low pollinator abundance within the study site. The proportion of visited flowers per inflorescence was negatively influenced by floral display size, which is in line with previous studies. In addition, solitary bees spent decreasing time in successive flowers within an inflorescence, and the time spent per flower was negatively affected by ambient temperature. Our results suggest that pollinator behaviour during visitation is poorly linked to pollen deposition and reproductive success in O. militaris.

show abstract

Floral resource availability from groundcover promotes bee abundance in coffee agroecosystems

Cited by 29 publications

References 57 publications

Floral turnover and climate drive seasonal bee diversity along a tropical elevation gradient

Floral turnover and climate drive seasonal bee diversity along a tropical elevation gradient

Effect of urbanization and its environmental stressors on the intraspecific variation of flight functional traits in two bumblebee species

Do local conspecific density and floral display size influence fruit set via pollinator visitation in Orchis militaris?

Contact Info

Product

Resources

About