Dominant Visitors Research Articles

Bees visiting the broad bean (Vicia faba L.) and the impact of border planting on their abundance and the yield improvement in Ismailia, Egypt

Incorporating flowering plants into cropping systems has the potential to actively enhance pollination and crops yields. This study evaluated whether the introduction of border planting affects bee visitation and yield of a broad bean (Vicia faba L.). Experiments were carried out in 2018 and 2019 in Ismailia, Egypt. Bee visitation and broad bean yields were compared between plots with and without border planting. Results showed that open flowers achieved higher yields than netted flowers. Apis mellifera L. was the dominant visitor, followed by four solitary bee species, Chalicodoma siculum (Rossi), Colletes lacunatus Dours, 1872, Andrena ovatula and Xylocopa pubescens (Kirby, 1802). The addition of border planting was associated with a significant increase in the abundance of all five bee visitors and the associated yields. Findings showed that flowering border plants adjacent to broad bean can actively enhance pollination services and yields of this commercially valuable crop, whilst helping to conserve vulnerable bee populations.

Exploring spatiotemporal dynamics of flower visitor association pattern on two Avicennia mangroves: a network approach.

Plant-flower visitor interaction is one of the most important relationships regarding the co-existence of the floral and faunal communities. The implication of network approaches is an efficient way to understand the impact of community structure on ecosystem functionality. To understand the association pattern of flower visitors, we performed this study onAvicennia officinalis and Avicennia marina mangroves from the islands of Indian Sundarban over three consecutive years. We found that visiting time and sites (islands) influenced the abundance of visitors. The bipartite networks showed a significant generalized structure for both site-visitor and visiting time-visitor networks where the strength and specialization of visitor species showed a highly and moderately significant positive correlation between both networks respectively. All the site-wise visiting time-visitor networks and year-wise site-visitor networks were significantly modular in structure. For both the plants, most of the visitors showed a generalized association pattern among islands and also among visiting times. Additionally, the study of the foraging behavior of dominant visitors showed Apis dorsata and Apis mellifera as the potential visitors for these plants. Our results showed that flower visitor networks are spatiotemporally dynamic. The interactions of visitors with flowers at different times influence their contribution to the network for becoming a generalist or peripheral species in the context of their visiting time, which may subsequently change over islands. This approach will help to devise more precise plant species-specific conservation strategies by understanding the contribution of visitors through the spatiotemporal context.

Seasonal Incidence of Insect-pests, Natural Enemies and Pollinators of Solanum melongena L. and Correlation between Their Daily Occurrences with Weather Parameters

The investigation was carried out at K.V.K Instructional Farm of Bhawanipatna, Kalahandi, Odisha, India during the cropping season 2020-21. Brinjal shoot and fruit borer (BSFB), whitefly, and jassid were the most significant pests found in brinjal, Solanum melongena L. while epilachna beetle was of minor importance as it was found in much lower numbers and caused less damage. They were found from 2nd to 16th Standard Meteorological Week (SMW). The population of whitefly had significant negative correlation with morning, evening and mean Relative Humidity (RH). There was a significant negative correlation of population of jassids with evening and mean RH but significant positive correlation with bright sunshine hours. The population of epilachna had significant negative correlation with morning, evening and mean RH but positive correlation with maximum, minimum and mean temperature. BSFB infestation on fruit had significant negative correlation with morning, evening and mean RH but positive correlation with maximum and mean temperature. There was a significant positive correlation of BSFB infestation on shoot with maximum, minimum and mean temperature but significant negative correlation with rainfall. The natural enemies found in brinjal ecosystem from 4th to 16th SMW and belonged to ladybird beetles, spiders, preying mantids, black ant, carabid beetle, syrphid flies, damselfly and chrysopids. The population of spiders had significant negative correlation with evening and mean RH but positive correlation with bright sunshine hours. There was a significant negative correlation of population of coccinellids with evening RH. The pollinators recorded from experimental field were honeybee and carpenter bee from 3rd to 16th SMW. Among them, carpenter bee, Xylocopa sp. was the most dominant visitor of brinjal flower in the field and was identified as potentially important in brinjal. The pollinators appeared in higher numbers during the blooming period and was the dominant species found in the field. The population of honey bees had significant negative correlation with evening RH.

Analysis of Clusters Number Effect Based on K-Means Method for Tourist Attractions Segmentation

The current development of tourism potential can have an impact on the implementation of regional autonomy. Madura is an island located at the northern tip of East Java Province, which has tourist attractions spread over four regencies, namely Bangkalan, Sampang, Pamekasan, and Sumenep. However, there are still many attractions that tourists have not touched. Therefore, the Madurese government tries to develop the existing potential. However, the development of this potential has not been carried out evenly by the government. This is due to the lack of grouping of data on the number of tourists, making it difficult for the tourism office to analyze the dominant visitor effect based on the variables that become characteristics in mapping the entrance ticket to increase the potential of tourism objects in Madura. There are 21 tourist objects in Bangkalan. There are several influencing factors to mapping, such as: Gender, age, occupation, education, and marital status. In this study, the admission ticket mapping system applies the K-Means method by dividing tourist objects into three groups including, (C1) high cluster, (C2) medium set, and (C3) low cluster. K-Means functions to map objects by mapping the analysis of data mining applications that can increase the number of tourist visits that impact the introduction of tourist objects and improve the country’s foreign exchange through the development of facilities and infrastructure.

Flower‐visitor diversity and pollination of Indian olive (Elaeocarpus floribundus Blume)

AbstractThis study assessed flower‐visitor assemblages, breeding system and pollination of Elaeocarpus floribundus Blume (Elaeocarpaceae) which is widely distributed throughout Asian countries. As soon as flowers opened, an array of flower visitors including members of Diptera, Hymenoptera and Thysanoptera visited flowers for their forage. The members of Diptera (82.6%) were the dominant visitors in comparison to Hymenoptera (10.4%) and Thysanoptera (7.0%). The flower visitor frequency, activity rate and index of visitation rate revealed that Chrysomya sp., Musca domestica and Eristalinus sp. of Diptera acted as potential pollinators. Self‐incompatibility index and reproductive efficacy were 0.53 and 0.35 respectively, indicating incomplete self‐compatibility. Hand pollination showed significantly higher fruit set in xenogamous pollination (36%) than open pollination (12.82%). A detailed understanding of such flower‐visitor interactions will be helpful in the conservation and sustenance of the species as well as biodiversity.

Pollinators of Oriental persimmon in Japan

Japanese farmers who grow Oriental persimmon, Diospyros kaki Thunb. (Ericales: Ebenaceae), occasionally introduce Apis mellifera L. (Hymenoptera: Apidae) hives into their orchards during the flowering season, mainly because cultivars such as ‘Fuyu’ require pollination for stable fruit set. However, wild pollinators might serve this function. Thus, we aimed at identifying the most important pollinators of D. kaki in Japan by surveying visitation frequency across ten prefectures and pollination efficiency. The predominant flower visitors were Bombus ardens ​ardens Smith (Hymenoptera: Apidae) and A. mellifera, with similar pollination efficiencies. The estimated threshold number of pollen grains for fruit set of D. kaki ‘Fuyu’ was 27, which was comparable to the number deposited by a single visit of either species, meaning one visit of these dominant visitors probably induces fruit set. However, more pollen grains deposited by multiple visits further ensured fruit set. To achieve > 80% fruit set, more than about 70 pollen grains were needed. These results indicate that several visits by the bees would be sufficient for fruit set of D. kaki ‘Fuyu’.

Pollinator diversity and foraging behavior of Apis mellifera Linnaeus and Apis cerana Fabricius on Chinese cabbage (Brassica rapa Linnaeus subspecies chinensis) grown under different farming systems

The present study was on pollinator diversity and foraging behavior of Apis mellifera Linnaeus and Apis cerana Fabricius on Chinese cabbage (Brassica rapa Linnaeus subspecies chinensis) grown under different farming systems. A total of 19 insects belonging to 16 genera under 7 families and 3 orders were recorded on Chinese cabbage. Among all insect visitors, A. mellifera (8.85 / 100 flowers) was the most dominant visitor. Significantly higher abundance was recorded in SPNF system followed by the control and CF system, respectively. The insect pollinators showed a positive correlation with temperature and a negative correlation with humidity. The average number of flowers visited by both foragers in one minute was significantly more in SPNF system followed by the control and CF system. The average time spent per flower by both foragers was significantly more in the CF system followed by the control and SPNF system. The number of loose pollen grains sticking to the body of insect pollinators recorded in SPNF system and CF system was statistically the same. Hence, it can be concluded that pollinators prefer SPNF system as compared to CF system and control. So, due to enhanced pollination in SPNF system, farmers may obtain more yields if they are consistent with the timely application of indigenous farm products.

Pengaruh Nilai Kepuasaan Faktor Suplai terhadap Loyalitas Pengunjung Pada Objek Wisata Posong

The dominant visitor satisfaction factor is influenced by tourism supply factors (attractions, accessibility, amenities, and ancilliery services) provided by the tour manager. The development and sustainability of tourism activities will have an impact on people's income can be seen from the value of visitor loyalty. Tourism that utilizes local resources will have an impact on the local economy of the region. Posong Tourism as a tour that utilizes local resources, namely the mountain view initiated by the community. The supply factor at Posong Tourism was also initiated and provided by the local community. The purpose of this study was to assess the effect of visitor satisfaction from supply factors on tourist visitor loyalty in the Posong Tourism object, Temanggung Regency. The research method used is a quantitative research method using Structural Equation Modeling Analysis (SEM). The results showed a significant direct effect between the supply of Posong Tourism supply factors to the value of visitor satisfaction, and there was also the influence of visitor satisfaction on the value of loyalty. In addition, the results of the analysis of theoretical models there are 9 indicators that have an indirect influence.

ANALISIS PENGARUH ELECTRONIC WORD OF MOUTH (eWOM) DAN KUALITAS LAYANAN TERHADAP KEPUTUSAN BERKUNJUNG KE AGROWISATA KAMPOENG ANGGREK KEDIRI

The purpose of this study are: 1) Describe the characteristics of visitors to the Kampoeng Anggrek Kediri Agro-tourism. 2) Analyzing the influence of Electronic Word Of Mouth (eWOM) on the decision to visit Kampoeng Anggrek Kediri Agro-Tourism. 3) Analyzing the effect of service quality on the decision to visit the Kampoeng Anggrek Kediri Agro-tourism. The research method was done intentionally (purposive) with a purposive sampling of 50 people. Research testing is done by studying the Structural Equation Model (SEM) software based on WarpPLS 5.0 Partial Least Square (PLS). The results of this study show the characteristics of Kampoeng Anggrek Kediri Agro-tourism visitors based on gender that is equal between men and women, dominant visitors get 21-30 years obtained from Kediri. Education visitors gather high school status as students, and the level of income between Rp. 0-500,000. The first visit was to the Kampoeng Anggrek Kediri Agro-tourism and a personal visit using a type of motorcycle transportation. The word of mouth electronic variable (eWOM) (X1) has a positive effect on the visit decision variable. service quality variables were significantly positive for visit decision variables. DOI : https://doi.org/10.33005/adv.v10i1.2615

Apple pollination is ensured by wild bees when honey bees are drawn away from orchards by a mass co-flowering crop, oilseed rape

Over the past two decades, the cultivated area of oilseed rape (Brassica napus L. or OSR), a mass-flowering crop, has markedly increased in Europe in response to bioenergy demands. As well as representing a major shift in floral composition across the landscape, mass-flowering OSR may alter pollination services to other simultaneously blooming crops, either decreasing pollination via competition for pollinators or facilitating it via pollinator spill-over. Apple (Malus domestica Borkh.) is an economically important, obligately insect-pollinated fruit crop that co-flowers with OSR. Using twelve independent apple orchards varying in the percentage of OSR in the surrounding landscape, we investigated the effect of OSR on pollinators and pollination of co-blooming apple. We collected bees with pan traps and quantified flower visitors during transect walks in both crops and we experimentally measured pollination service provision to apple as fruit and seed set. We confirm that apples are highly dependent on animal pollination and report pollination limitation in our apple orchards. Honey bees were the numerically dominant visitors of apple flowers observed during transect walks. Though their numbers dropped with an increasing percentage of OSR in the landscape, the number of bumble bees visiting apple flowers remained stable and those of other wild bees rose. The pan trapped Shannon diversity of bees remained constant. We could not detect an effect of OSR in the landscape on apple fruit set or seed set, both of which remained stable. Local wild bee populations might compensate for the loss of honey bees in the provision of pollination services in apple, providing especially effective pollination. Our results underscore not only the dominant role of bees in apple pollination but also the importance of wild bee conservation for providing pollination insurance and stability of apple crop yields under changing agricultural policies and cropping practices.

Determinants of Bee Visitation in an Economically Important Vegetable Crop Along an Agricultural Intensification Gradient

Various factors associated with agricultural intensification e.g. loss of semi-natural habitats and excessive use of chemical pesticides have been implicated as major drivers of pollinators and pollination service decline. In the developing countries, where agricultural intensification is still an ongoing process, agricultural landscape exists as a gradient of agricultural fields at various degrees of intensification. The present study looks at how factors associated with agricultural intensification impacts bee visitation on brinjal, an economically important crop, along such an agricultural intensification gradient. Bee visitation varied significantly along the gradient and was highest in the areas of low agricultural intensity. Apis cerana was the dominant visitors in areas of high agricultural intensity while for the low agricultural intensity areas Xylocopa spp. and Amegilla spp. were the dominant visitors. The visiting bee communities were also distinctly different in the high, mid and low agricultural intensity areas. Area under agriculture, non crop density and pesticide use intensity together influenced bee visitation.

Geographic variation of reproductive traits and competition for pollinators in a bird-pollinated plant.

Geographic variation in the reproductive traits of animal‐pollinated plants can be shaped by spatially variable selection imposed by differences in the local pollination environment. We investigated this process in Babiana ringens (Iridaceae), an enigmatic species from the Western Cape region of South Africa. B. ringens has evolved a specialized perch facilitating cross‐pollination by sunbirds and displays striking geographic variation in perch size and floral traits. Here, we investigate whether this variation can be explained by geographic differences in the pollinator communities. We measured floral and inflorescence traits, and abiotic variables (N, P, C, and rainfall) and made observations of sunbirds in populations spanning the range of B. ringens. In each population, we recorded sunbird species identity and measured visitation rates, interfloral pollen transfer, and whether the seed set of flowers was pollen limited. To evaluate whether competition from co‐occurring sunbird‐pollinated species might reduce visitation, we quantified nectar rewards in B. ringens and of other co‐flowering bird‐pollinated species in local communities in which populations occurred. Variation in abiotic variables was not associated with geographical variation of traits in B. ringens. Malachite sunbirds were the dominant visitor (97% of visits) and populations with larger‐sized traits exhibited higher visitation rates, more between‐flower pollen transfer and set more seed. No sunbirds were observed in four populations, all with smaller‐sized traits. Sunbird visitation to B. ringens was not associated with local sunbird activity in communities, but sunbird visitation was negatively associated with the amount of B. ringens sugar relative to the availability of alternative nectar sources. Our study provides evidence that B. ringens populations with larger floral traits are visited more frequently by sunbirds, and we propose that visitation rates to B. ringens may be influenced, in part, by competition with other sunbird‐pollinated species.

Facilitative interactions among co-flowering Primula species mediated by pollinator sharing

We investigated flowering phenology, pollinator visitation and visitor community composition in communities of self-incompatible sympatric Primula species in a high-elevation Himalayan ecosystem. Within the tight constraints imposed by short growing seasons in such ecosystems, interactions among co-occurring plants for pollinators may vary from competition to facilitation, depending on the specifics of the system. We found that pollinator community composition changed with elevation in this system: lepidopterans were the dominant visitors at lower elevations (2200–3000 masl), bees (other than bumblebees) dominated at mid-elevations (3000–3800 masl) and bumblebees dominated at higher elevations (3800–4600 masl). However, within an elevation zone, there were no significant differences in pollinators amongst co-occurring Primula species. At a focal study site where multiple Primula species co-occurred, our results showed that even while the overall flowering periods of these species broadly overlapped, the peak flowering periods of different Primula species were temporally segregated. Upon further inferring the nature of interaction amongst co-flowering Primula species, we found that plots with higher Primula diversity (≥ 2 species) and density (80–100 individuals) experienced significantly higher pollinator visitation, compared with plots with single species and low flower densities (40–50 individuals). Our results suggest that in this community of sympatric, self-incompatible Primula species, a broadly aggregated, synchronous floral display of multiple species results in pollinator facilitation by attracting a greater number of pollinator visitors. Within this broadly synchronous display, the temporal segregation of peak flowering period of individual species may reduce competition for pollinators and limit heterospecific pollen transfer.

Effects of forest and cave proximity on fruit set of tree crops in tropical orchards in Southern Thailand

Abstract:Deforestation and forest fragmentation are contributing to declines in crop pollinator populations worldwide. Several studies have examined the impact of forest proximity on plant pollination ecology, but concentrated on single crop species. However, it can be more informative to investigate multiple crop and pollinator species in a community, because different pollinator groups may respond differently to forest distance. We evaluated flower visitor diversity, visitation frequency, and fruit set for three crop species (rambutan, durian and mango) in 10 pairs of mixed fruit orchards. Each pair consisted of one orchard near to (< 1 km) and one orchard far from (> 7 km) the forest edge. Rambutan fruit set was significantly influenced by distance to forest. The main visitors of rambutan flowers were stingless bees. In contrast, the dominant visitors to durian and mango flowers were nectarivorous bats and flies, respectively, and the fruit set of these crops were not significantly influenced by distance to forest. However, durian fruit set was negatively affected by distance to the nearest cave inhabited by nectarivorous bats. This study demonstrates that both caves and forests can be important pollinator sources for agricultural crops, and that the dispersal success of pollinators is related to isolation from source habitats. Maintaining forest patches and limestone karsts may provide stepping stones across fragmented landscapes, and attract greater numbers of pollinators to agricultural areas.

Effects of frugivorous birds on seed retention time and germination in Xishuangbanna, southwest China.

The dispersal of many plants depends on transportation by birds as seed dispersers. The birds play an important role in long distance seed dispersal and may also affect seed germination. However, for plants who have many bird dispersers, the influence of dominant and non-dominant dispersers on retention time (dispersal distance) and germination remains poorly understood. In this study, we performed experiments with captive frugivorous birds and fruiting plant species to study the effects of dominant and non-dominant dispersers on seed retention time (SRT) and germination (seed germination percentage and germination speed). Our study showed a great interspecific variation in the effects of frugivorous birds on both SRT and germination. Some birds enhance the germination of a given plant species, but others do not. Generally, the dominant visitors improved the seed germination and performed longer seed retention time.

Dominance of the semi-wild honeybee as coffee pollinator across a gradient of shade-tree structure in Ethiopia

Abstract:Mass-flowering plant species are often pollinated by social bees that are able to use the abundant resource by recruiting workers from their colonies. In this study we surveyed pollinators on the mass-flowering perennial crop coffee (Coffea arabica) in its native range in Ethiopia. Previous studies in areas where coffee is introduced often find the social honeybee, Apis mellifera, to be the dominant pollinator. In those areas, the bee-species composition visiting coffee varies with a higher bee diversity closer to forest or in less modified habitats. We surveyed pollinators of coffee under different shade-tree structures, by collecting hoverflies and bees landing on coffee flowers in 19 sites in south-west Ethiopia. We found the native honeybee (A. mellifera) to be the dominant visitor of coffee flowers in all sites. Honeybee abundance was not affected by the local shade-tree structure, but was positively affected by the amount of coffee flower resources. Other pollinators were positively affected by complex shade-tree structures. To conclude, the honeybee is clearly the dominant pollinator of coffee in Ethiopia along the whole shade-tree structure gradient. Its high abundance could be a consequence of the provision of traditional bee hives in the landscape, which are colonized by wild swarming honeybees.

Floral polymorphism and the fitness implications of attracting pollinating and florivorous insects.

Floral polymorphism is frequently attributed to pollinator-mediated selection. Multiple studies, however, have revealed the importance of non-pollinating visitors in floral evolution. Using the polymorphic annual daisy Ursinia calenduliflora, this study investigated the importance of different insect visitors, and their effects on fitness, in the maintenance of floral polymorphism. The spatial structure of a discrete floral polymorphism was characterized based on the presence/absence of anthocyanin floret spots in U. calenduliflora. A 3-year observational study was then conducted in polymorphic populations to investigate differences in visitation rates of dominant visitors to floral morphs. Experiments were performed to explore the floral preference of male and female Megapalpus capensis (the dominant insect visitor) and their effectiveness as pollinators. Next, floral damage by antagonistic florivores and the reproductive success of the two floral morphs were surveyed in multiple populations and years. Floral polymorphism in U. calenduliflora was structured spatially, as were insect visitation patterns. Megapalpus capensis males were the dominant visitors and exhibited strong preference for the spotted morph in natural and experimental observations. While this may indicate potential fitness benefits for the spotted morph, female fitness did not differ between floral morphs. However, as M. capensis males are very efficient at exporting U. calenduliflora pollen, their preference may likely increase the reproductive fitness of the spotted morph through male fitness components. The spotted morph, however, also suffered significantly greater costs due to ovule predation by florivores than the spotless morph. The results suggest that pollinators and florivores may potentially exert antagonistic selection that could contribute to the maintenance of floral polymorphism across the range of U. calenduliflora. The relative strength of selection imposed by each agent is potentially determined by insect community composition and abundance at each site, highlighting the importance of community context in the evolution of floral phenotypes.

Alien pollinator promotes invasive mutualism in an insular pollination system

The alien predatory lizard, Anolis carolinensis, has reduced the insect fauna on the two main islands of the Ogasawara archipelago in Japan. As a result of this disturbance, introduced honeybees are now the dominant visitors to flowers instead of endemic bees on these islands. On the other hand, satellite islands not invaded by alien anoles have retained the native flower visitors. The effects of pollinator change on plant reproduction were surveyed on these contrasting island groups. The total visitation rates and the number of interacting visitor groups on main islands were 63% and 30% lower than that on satellite islands, respectively. On the main islands, the honeybees preferred to visit alien flowers, whereas the dominant endemic bees on satellite islands tended to visit native flowers more frequently than alien flowers. These results suggest that alien anoles destroy the endemic pollination system and caused shift to alien mutualism. On the main islands, the natural fruit set of alien plants was significantly higher than that of native plants. In addition, the natural fruit set was positively correlated with the visitation rate of honeybees. Pollen limitation was observed in 53.3% of endemic species but only 16.7% of alien species. These data suggest that reproduction of alien plants was facilitated by the floral preference of introduced honeybees.

Mechanisms of prezygotic reproductive isolation between two sympatric species,Gelsemium rankiniiandG. sempervirens(Gelsemiaceae), in the southeastern United States

Natural hybridization plays a critical role in speciation, the maintenance of reproductive isolation, and genetic introgression. While many plant species have hybrid swarms in areas of sympatry, the lack of hybrids among closely related sympatrically distributed species suggests that strong pre- and/or postzygotic barriers exist to hybridization. Gelsemium sempervirens and G. rankinii (Gelsemiaceae) are sympatrically distributed southeastern sister taxa that have strong postzygotic barriers to hybrid formation and high levels of genetic differentiation. In this study, two sympatric populations in Lowndes County, Georgia were surveyed from 1999-2005 to assess the role of temporal and pollinator isolation as potential prezygotic barriers. The populations had mostly non-overlapping flowering periods in 2003-2005, with significant differences in time of peak flowering and length of flowering. Both species shared a similar community of flower visitors, with the apid bee Habropoda laboriosa the dominant visitor to both species. A choice experiment found that H. laboriosa visited both species but preferred G. sempervirens. The primary prezygotic barrier is temporal isolation preventing hybridization in spite of the shared pollinators. This study suggests that reliance on a shared pollinator during speciation may limit opportunity for divergent selection on flowering time.

Flowering and seasonal changes in flower sex ratio and frequency of flower visitors in a population of Saxifraga hirculus

The open, dish‐shaped flowers ofSaxifraga hirculusreflected ultraviolet and yellow light, contained very small amounts of nectar, and contained an average of about 75300 pollen grains per flower. Almost 11% of the pollen was inviable. Stigmatic pollen loads and seed set decreased during the course of the season. The plant appeared to be fully between‐ramet compatible and partially within‐ramet compatible. Seed set for the population was 30.3%. The protandrous flower opened during the day and had male and female phases of nine and three days, respectively. The protandrous system reduced the number of pollination days by a third.At least 26 species of insects, 16 of which were syrphids, visited the flowers. Based on the number of flower visits, four species were the dominant visitors ofS. hirculus: Eurimyia lineataandNeoascia tenur(Diptera: Syrphidae);Asindulum nigrum(Diptera: Mycetophilidae), andZygaena trlfolii(Lepidoptera: Zygaenidae).Eurimyia lineatawas the most frequent visitor (51% of all visits). As the season advanced, the visits byE. lineatadecreased, whereas the visits byA. nigrumincreased.Z. trifollidisappeared completely towards the end of the season. Only two thirds of the pollination days were “good” foraging days for these visitor species. The four major visitor species spent an average of 11.7, 27.4, 30.7 and 22.6 s per flower, respectively. Estimates suggest that about 6.5 visits (which is equal to 2.6 min of flower‐visiting) and 2100 grains of pollen were required to produce one seed.