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Journal articles on the topic 'POLLINATOR SCARCITY'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

Sandhu, Harpinder, Benjamin Waterhouse, Stephane Boyer, and Steve Wratten. "Scarcity of ecosystem services: an experimental manipulation of declining pollination rates and its economic consequences for agriculture." PeerJ 4 (July 5, 2016): e2099. http://dx.doi.org/10.7717/peerj.2099.

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Ecosystem services (ES) such as pollination are vital for the continuous supply of food to a growing human population, but the decline in populations of insect pollinators worldwide poses a threat to food and nutritional security. Using a pollinator (honeybee) exclusion approach, we evaluated the impact of pollinator scarcity on production in four brassica fields, two producing hybrid seeds and two producing open-pollinated ones. There was a clear reduction in seed yield as pollination rates declined. Open-pollinated crops produced significantly higher yields than did the hybrid ones at all po

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2

Ling, Tial, Lin-Lin Wang, Zhi-Qiang Zhang, Amots Dafni, Yuan-Wen Duan, and Yong-Ping Yang. "High autonomous selfing capacity and low flower visitation rates in a subalpine population of Prunella vulgaris (Lamiaceae)." Plant Ecology and Evolution 150, no. (1) (2017): 59–66. https://doi.org/10.5091/plecevo.2017.1274.

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<b>Background and aims</b> – Autonomous selfing is a potential strategy to overcome pollinator scarcity or unreliability, but the specific mechanisms of autonomous selfing need further study to clarify our understanding of this phenomenon. This study investigated the mechanism of autonomous selfing in a subalpine population of <i>Prunella vulgaris</i> (Lamiaceae), a species with didynamous stamens.<b>Methods</b> – We studied the floral biology, pollinator activity, and breeding system of <i>Prunella vulgaris</i> in a natural population. The short stamens and long stamens were removed separatel

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3

Jian, Jiaxin, Xueping Chai, Xiaonan Zhao, and Zhaoping Yang. "Self-Pollinated Types and Ecological Adaptations of the Desert Plant Gymnocarpos przewalskii." Plants 14, no. 10 (2025): 1410. https://doi.org/10.3390/plants14101410.

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In desert plants, outcrossing is frequently limited by pollinator scarcity, leading to a certain percentage of self-fertilization. However, research on the ecological adaptations of self-fertilized seeds remains limited. Gymnocarpos przewalskii Maxim, a Tertiary relict plant in the arid deserts of Northwest China, exhibits pronounced self-pollination. In this study, the population of G. przewalskii from the fifth regiment of Alar City was selected to explore its self-pollination types, self-pollination percentages, and ecological adaptations. We found that artificially cross-pollinated G. prze

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4

Zaninotto, Vincent, Adrien Perrard, Olivier Babiar, Amandine Hansart, Cécile Hignard, and Isabelle Dajoz. "Seasonal Variations of Pollinator Assemblages among Urban and Rural Habitats: A Comparative Approach Using a Standardized Plant Community." Insects 12, no. 3 (2021): 199. http://dx.doi.org/10.3390/insects12030199.

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Even though urban green spaces may host a relatively high diversity of wild bees, urban environments impact the pollinator taxonomic and functional diversity in a way that is still misunderstood. Here, we provide an assessment of the taxonomic and functional composition of pollinator assemblages and their response to urbanization in the Paris region (France). We performed a spring-to-fall survey of insect pollinators in green spaces embedded in a dense urban matrix and in rural grasslands, using a plant setup standardized across sites and throughout the seasons. We compared pollinator species

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5

Chacoff, Natacha P., Marcelo A. Aizen, and Valeria Aschero. "Proximity to forest edge does not affect crop production despite pollen limitation." Proceedings of the Royal Society B: Biological Sciences 275, no. 1637 (2008): 907–13. http://dx.doi.org/10.1098/rspb.2007.1547.

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A decline in pollination function has been linked to agriculture expansion and intensification. In northwest Argentina, pollinator visits to grapefruit, a self-compatible but pollinator-dependent crop, decline by approximately 50% at 1 km from forest edges. We evaluated whether this decrease in visitation also reduces the pollination service in this crop. We analysed the quantity and quality of pollen deposited on stigmas, and associated limitation of fruit production at increasing distances (edge: 10, 100, 500 and 1000 m) from the remnants of Yungas forest. We also examined the quantitative a

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6

Higuera-Díaz, Mónica, Jessamyn S. Manson, and Jocelyn C. Hall. "Pollination biology of Cleomella serrulata and Polanisia dodecandra in a protected natural prairie in southern Alberta, Canada." Botany 93, no. 11 (2015): 745–57. http://dx.doi.org/10.1139/cjb-2015-0084.

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Flowering plants that attract a diverse range of pollinators represent a generalist pollination system. Studying these plants provides valuable information about accessibility of floral resources to pollinators, which is particularly important in areas where scarcity of flowers limits pollinator populations. Here, we describe the flowering phenology, reproductive biology, and visitor community of Cleomella serrulata (Pursh) Roalson & J.C.Hall and Polanisia dodecandra (L.) DC., two native species with generalist pollination systems and limited distribution in Albertan prairies. Although the

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7

Rumpa, Mst Jannatul Ferdaus, Md Nabab Hossain, Saeem Miah, et al. "Assemblages of Insect Pollinators in BARI Sarisha-17 (Brassica rapa L.) Cultivation Fields at the University of Rajshahi, Bangladesh." UTTAR PRADESH JOURNAL OF ZOOLOGY 46, no. 12 (2025): 256–61. https://doi.org/10.56557/upjoz/2025/v46i125062.

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The provision of pollination services by pollinators is threatened by declines in their abundance and diversity. The reduction in pollinator populations may result in a decline in plant species diversity. Research on insect pollinators is a significant topic of discussion among researchers worldwide, primarily due to population declines attributed to various stressors, including climate change and the scarcity of floral resources. This study investigates the variety and quantity of insect pollinators in BARI Sarisha-17 (Brassica rapa L.) Cultivation Fields at the University of Rajshahi are cru

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8

Rodríguez‐Oseguera, A. G., A. Casas, Y. Herrerías‐Diego, and E. Pérez‐Negrón. "Effect of habitat disturbance on pollination biology of the columnar cactus Stenocereus quevedonis at landscape-level in central Mexico." Plant Biology 15, no. 3 (2013): 573–82. https://doi.org/10.5281/zenodo.13432392.

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(Uploaded by Plazi for the Bat Literature Project) Stenocereus quevedonis ('pitire') is a columnar cactus endemic to central Mexico, grown for its edible fruit. Phenology, pollination biology and behaviour of flower visitors of this species were compared in six conserved and disturbed sites, hypothesising that: (i) pitire pollination is self-incompatible, requiring animal vectors; (ii) higher incidence of radiation on plants in cleared forest may lead to a higher number of flowers per pitire plant and longer blooming season, and disturbing and differential spatial availability of flower resour

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9

Rodríguez‐Oseguera, A. G., A. Casas, Y. Herrerías‐Diego, and E. Pérez‐Negrón. "Effect of habitat disturbance on pollination biology of the columnar cactus Stenocereus quevedonis at landscape-level in central Mexico." Plant Biology 15, no. 3 (2013): 573–82. https://doi.org/10.5281/zenodo.13432392.

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(Uploaded by Plazi for the Bat Literature Project) Stenocereus quevedonis ('pitire') is a columnar cactus endemic to central Mexico, grown for its edible fruit. Phenology, pollination biology and behaviour of flower visitors of this species were compared in six conserved and disturbed sites, hypothesising that: (i) pitire pollination is self-incompatible, requiring animal vectors; (ii) higher incidence of radiation on plants in cleared forest may lead to a higher number of flowers per pitire plant and longer blooming season, and disturbing and differential spatial availability of flower resour

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10

Rodríguez‐Oseguera, A. G., A. Casas, Y. Herrerías‐Diego, and E. Pérez‐Negrón. "Effect of habitat disturbance on pollination biology of the columnar cactus Stenocereus quevedonis at landscape-level in central Mexico." Plant Biology 15, no. 3 (2013): 573–82. https://doi.org/10.5281/zenodo.13432392.

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(Uploaded by Plazi for the Bat Literature Project) Stenocereus quevedonis ('pitire') is a columnar cactus endemic to central Mexico, grown for its edible fruit. Phenology, pollination biology and behaviour of flower visitors of this species were compared in six conserved and disturbed sites, hypothesising that: (i) pitire pollination is self-incompatible, requiring animal vectors; (ii) higher incidence of radiation on plants in cleared forest may lead to a higher number of flowers per pitire plant and longer blooming season, and disturbing and differential spatial availability of flower resour

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11

Rodríguez‐Oseguera, A. G., A. Casas, Y. Herrerías‐Diego, and E. Pérez‐Negrón. "Effect of habitat disturbance on pollination biology of the columnar cactus Stenocereus quevedonis at landscape-level in central Mexico." Plant Biology 15, no. 3 (2013): 573–82. https://doi.org/10.5281/zenodo.13432392.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) Stenocereus quevedonis ('pitire') is a columnar cactus endemic to central Mexico, grown for its edible fruit. Phenology, pollination biology and behaviour of flower visitors of this species were compared in six conserved and disturbed sites, hypothesising that: (i) pitire pollination is self-incompatible, requiring animal vectors; (ii) higher incidence of radiation on plants in cleared forest may lead to a higher number of flowers per pitire plant and longer blooming season, and disturbing and differential spatial availability of flower resour

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12

Rodríguez‐Oseguera, A. G., A. Casas, Y. Herrerías‐Diego, and E. Pérez‐Negrón. "Effect of habitat disturbance on pollination biology of the columnar cactus Stenocereus quevedonis at landscape-level in central Mexico." Plant Biology 15, no. 3 (2013): 573–82. https://doi.org/10.5281/zenodo.13432392.

Full text

Abstract:

(Uploaded by Plazi for the Bat Literature Project) Stenocereus quevedonis ('pitire') is a columnar cactus endemic to central Mexico, grown for its edible fruit. Phenology, pollination biology and behaviour of flower visitors of this species were compared in six conserved and disturbed sites, hypothesising that: (i) pitire pollination is self-incompatible, requiring animal vectors; (ii) higher incidence of radiation on plants in cleared forest may lead to a higher number of flowers per pitire plant and longer blooming season, and disturbing and differential spatial availability of flower resour

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13

Krahl, A. H., D. R. P. Krahl, J. J. Valsko, A. C. Webber, and E. R. Pansarin. "Evidence of reward production and pollination by Centris in Encyclia (Orchidaceae: Laeliinae): the reproductive biology of Encyclia mapuerae." Australian Journal of Botany 65, no. 3 (2017): 225. http://dx.doi.org/10.1071/bt16253.

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Encyclia is a neotropical orchid genus distributed from Florida to South Brazil and comprises ~120 taxa, including Encyclia mapuerae (Huber) Brade & Pabst. Besides its diversity and wide distribution, conclusive data on pollinators and reproductive biology of this orchid genus is scarce. Furthermore, nothing is known about the production of floral reward in Encyclia but the pollinators of their species are assumed to be attracted through food deception. Based on data on phenology, floral morpho-anatomy, histochemistry, pollinators, pollination mechanisms, and breeding system, the reproduct

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14

Abrahamczyk, S., D. Souto-Vilarós, and S. S. Renner. "Escape from extreme specialization: passionflowers, bats and the sword-billed hummingbird." Proceedings of the Royal Society B: Biological Sciences 281, no. 1795 (2014): 20140888. http://dx.doi.org/10.1098/rspb.2014.0888.

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A striking example of plant/pollinator trait matching is found between Andean species of Passiflora with 6–14-cm-long nectar tubes and the sword-billed hummingbird, Ensifera ensifera , with up to 11-cm-long bills. Because of the position of their anthers and stigmas, and self-incompatibility, these passionflower species depend on E. ensifera for pollination. Field observations show that the bird and plant distribution match completely and that scarcity of Ensifera results in reduced passionflower seed set. We here use nuclear and plastid DNA sequences to investigate how often and when these mu

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Abrahamczyk, S., D. Souto-Vilarós, and S. S. Renner. "Escape from extreme specialization: passionflowers, bats and the sword-billed hummingbird." Proceedings of the Royal Society B: Biological Sciences 281, no. 1795 (2014): 20140888. https://doi.org/10.5281/zenodo.14821477.

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(Uploaded by Plazi for the Bat Literature Project) A striking example of plant/pollinator trait matching is found between Andean species of Passiflora with 6–14-cm-long nectar tubes and the sword-billed hummingbird, Ensifera ensifera , with up to 11-cm-long bills. Because of the position of their anthers and stigmas, and self-incompatibility, these passionflower species depend on E. ensifera for pollination. Field observations show that the bird and plant distribution match completely and that scarcity of Ensifera results in reduced passionflower seed set. We here use nuclear and plastid DNA s

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16

DeNittis, Alyson M., and Susan E. Meyer. "Reproductive Success of an Endangered Plant after Invasive Bees Supplant Native Pollinator Services." Diversity 14, no. 1 (2021): 1. http://dx.doi.org/10.3390/d14010001.

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Arctomecon humilis (dwarf bear poppy) is an endangered gypsophile restricted to the St. George area in southern Utah, USA. Extirpation of the rare oligolectic bee Perdita meconis and decline of other native pollinators within the last 20 years has been largely attributed to the advent of invasive Africanized honeybees (AHBs), which have become the predominant pollinator for A. humilis. A three-year study was carried out to determine if reliance on AHBs had a negative effect on reproductive output. In the first year, pollen addition experiments were carried out in a small, isolated population t

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17

Brzosko, Emilia, and Paweł Mirski. "Floral Nectar Chemistry in Orchids: A Short Review and Meta-Analysis." Plants 10, no. 11 (2021): 2315. http://dx.doi.org/10.3390/plants10112315.

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Nectar is one of the most important flower traits, shaping plant–pollinator interactions and reproductive success. Despite Orchidaceae including numerous nectariferous species, nectar chemistry in this family has been infrequently studied. Therefore, the aim of this study is to compile data about nectar attributes in different orchid species. The scarcity of data restricted analyses to sugar concentration and composition. Our results suggest that the most important factor shaping nectar traits in orchids is the pollinator type, although we also found differentiation of nectar traits according

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18

Fleming, Theodore H., Merlin D. Tuttle, and Margaret A. Horner. "Pollination Biology and the Relative Importance of Nocturnal and Diurnal Pollinators in Three Species of Sonoran Desert Columnar Cacti." Southwestern Naturalist 41, no. 3 (1996): 257–69. https://doi.org/10.5281/zenodo.13410872.

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(Uploaded by Plazi for the Bat Literature Project) We studied the pollination biology of three species of night-blooming columnar cacti (cardon, Pachycereuspringlei; saguaro, Carnegia gigantea; and organ pipe, Stenocereusthurberi) near Bahia Kino, Sonora, Mexico, by addressing two questions: (1) What is the relative importance of nocturnal (bats, moths) and diurnal (bees, birds) pollinators for fruit and seed set, and (2) To what extent do these cacti compete for pollinators? Honeybees had the highest visitation rates to flowers of the three species but are relatively ineffective pollinators.

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Fleming, Theodore H., Merlin D. Tuttle, and Margaret A. Horner. "Pollination Biology and the Relative Importance of Nocturnal and Diurnal Pollinators in Three Species of Sonoran Desert Columnar Cacti." Southwestern Naturalist 41, no. 3 (1996): 257–69. https://doi.org/10.5281/zenodo.13410872.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We studied the pollination biology of three species of night-blooming columnar cacti (cardon, Pachycereuspringlei; saguaro, Carnegia gigantea; and organ pipe, Stenocereusthurberi) near Bahia Kino, Sonora, Mexico, by addressing two questions: (1) What is the relative importance of nocturnal (bats, moths) and diurnal (bees, birds) pollinators for fruit and seed set, and (2) To what extent do these cacti compete for pollinators? Honeybees had the highest visitation rates to flowers of the three species but are relatively ineffective pollinators.

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Fleming, Theodore H., Merlin D. Tuttle, and Margaret A. Horner. "Pollination Biology and the Relative Importance of Nocturnal and Diurnal Pollinators in Three Species of Sonoran Desert Columnar Cacti." Southwestern Naturalist 41, no. 3 (1996): 257–69. https://doi.org/10.5281/zenodo.13410872.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We studied the pollination biology of three species of night-blooming columnar cacti (cardon, Pachycereuspringlei; saguaro, Carnegia gigantea; and organ pipe, Stenocereusthurberi) near Bahia Kino, Sonora, Mexico, by addressing two questions: (1) What is the relative importance of nocturnal (bats, moths) and diurnal (bees, birds) pollinators for fruit and seed set, and (2) To what extent do these cacti compete for pollinators? Honeybees had the highest visitation rates to flowers of the three species but are relatively ineffective pollinators.

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21

Fleming, Theodore H., Merlin D. Tuttle, and Margaret A. Horner. "Pollination Biology and the Relative Importance of Nocturnal and Diurnal Pollinators in Three Species of Sonoran Desert Columnar Cacti." Southwestern Naturalist 41, no. 3 (1996): 257–69. https://doi.org/10.5281/zenodo.13410872.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We studied the pollination biology of three species of night-blooming columnar cacti (cardon, Pachycereuspringlei; saguaro, Carnegia gigantea; and organ pipe, Stenocereusthurberi) near Bahia Kino, Sonora, Mexico, by addressing two questions: (1) What is the relative importance of nocturnal (bats, moths) and diurnal (bees, birds) pollinators for fruit and seed set, and (2) To what extent do these cacti compete for pollinators? Honeybees had the highest visitation rates to flowers of the three species but are relatively ineffective pollinators.

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22

Fleming, Theodore H., Merlin D. Tuttle, and Margaret A. Horner. "Pollination Biology and the Relative Importance of Nocturnal and Diurnal Pollinators in Three Species of Sonoran Desert Columnar Cacti." Southwestern Naturalist 41, no. 3 (1996): 257–69. https://doi.org/10.5281/zenodo.13410872.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We studied the pollination biology of three species of night-blooming columnar cacti (cardon, Pachycereuspringlei; saguaro, Carnegia gigantea; and organ pipe, Stenocereusthurberi) near Bahia Kino, Sonora, Mexico, by addressing two questions: (1) What is the relative importance of nocturnal (bats, moths) and diurnal (bees, birds) pollinators for fruit and seed set, and (2) To what extent do these cacti compete for pollinators? Honeybees had the highest visitation rates to flowers of the three species but are relatively ineffective pollinators.

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23

Fleming, Theodore H., Merlin D. Tuttle, and Margaret A. Horner. "Pollination Biology and the Relative Importance of Nocturnal and Diurnal Pollinators in Three Species of Sonoran Desert Columnar Cacti." Southwestern Naturalist 41, no. 3 (1996): 257–69. https://doi.org/10.5281/zenodo.13410872.

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Abstract:

(Uploaded by Plazi for the Bat Literature Project) We studied the pollination biology of three species of night-blooming columnar cacti (cardon, Pachycereuspringlei; saguaro, Carnegia gigantea; and organ pipe, Stenocereusthurberi) near Bahia Kino, Sonora, Mexico, by addressing two questions: (1) What is the relative importance of nocturnal (bats, moths) and diurnal (bees, birds) pollinators for fruit and seed set, and (2) To what extent do these cacti compete for pollinators? Honeybees had the highest visitation rates to flowers of the three species but are relatively ineffective pollinators.

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Kelley, Scott T., and R. G. Latta. "Evidence for high rates of self-fertilization in the alpine herb Epilobium anagallidifolium (Onagraceae)." Canadian Journal of Botany 76, no. 11 (1998): 1978–80. http://dx.doi.org/10.1139/b98-218.

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Epilobium anagallidifolium Lam., alpine willow-herb, is a small perennial herb found growing along the moist creek sides of recent snow runoff in alpine regions. The floral morphology of E. anagallidifolium, in which the anthers rest neatly atop the stigma when the flower is closed, indicates this species may regularly self-fertilize. We determined the mating system of this species by analyzing allozyme loci from 240 individuals in 20 different families (12 individuals per family) for two polymorphic enzymes: PGI and MDH. In every family studied, all of the individuals within a family were hom

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Valdivia, Carlos, Alejandra Bahamondez, and Javier Simonetti. "Negative effects of forest fragmentation and proximity to edges on pollination and herbivory of Bomarea salsilla (Alstroemeriaceae)." Plant Ecology and Evolution 144, no. (3) (2011): 281–87. https://doi.org/10.5091/plecevo.2011.487.

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<b>Background</b> – Habitat fragmentation may have detrimental effects on both plant-mutualistic (i.e.pollination) and plant-antagonistic interactions (i.e.foliar herbivory). Such double negative effects may lead to a change in fitness, because the negative effects of a loss of a mutualism may be counterbalanced by the positive effects of a loss of an antagonism. In spite of being of great importance, however, the assessment of such ecological relationships has traditionally been performed separately. <b>Approach</b> – We evaluated fragmentation and edge effects on floral and foliar display, f

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DOGRA, ARCHIE, MEENA THAKUR, HK SHARMA, MOHAMMED ABDUL WASEEM, and SIMRAN BHATIA. "Nutritional Aspects of Pollen Diets and Evaluation of the Acceptance of Pollen Diets by Honey Bees." Journal of Scientific Research and Reports 31, no. 7 (2025): 23–30. https://doi.org/10.9734/jsrr/2025/v31i73224.

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The exotic honeybee Apis mellifera L. provides highly valued pollination services for a wide variety of agricultural crops and ranks as the single pollinator for crops most frequently worldwide. In Himachal Pradesh, bee keeping relies on the migration of bee colonies to other states by beekeepers, particularly during winters, due to the scarcity of bee flora. Thus, to keep honeybee colonies strong during dearth periods, indigenous alternative pollen sources need to be evaluated as a part of good management practices for beekeeping. The studies were carried out at the experimental farm and labo

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Corbet, Sarah A., Jennie Bee, Kanchon Dasmahapatra, et al. "Native or Exotic? Double or Single? Evaluating Plants for Pollinator-friendly Gardens." Annals of Botany 87, no. 2 (2001): 219–32. http://dx.doi.org/10.1006/anbo.2000.1322.

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Abstract In a series of dawn-to-dusk studies, we examined the nature and accessibility of nectar rewards for pollinating insects by monitoring insect visits and the secretion rate and standing crop of nectar in the British native plant species Salvia pratensis , Stachys palustris , S. officinalis , Lythrum salicaria , Linaria vulgaris , the non-native Calendula officinalis , Petunia × hybrida , Salvia splendens , and the possibly introduced Saponaria officinalis . We also compared single with double variants of Lotus corniculatus , Saponaria officinalis , Petunia × hybrida and Calendula offici

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Martínez-Medina, Miquel Àngel, Miguel Ángel Pérez-Martín, and Teodoro Estrela Monreal. "Desalination in Spain and the Role of Solar Photovoltaic Energy." Journal of Marine Science and Engineering 12, no. 6 (2024): 859. http://dx.doi.org/10.3390/jmse12060859.

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Water scarcity will increase in the world in the coming decades due to climate change, especially in areas that currently already have water scarcity, such as the Mediterranean area. In these areas, to guarantee water resources, systems’ sustainability is necessary to improve demand management and the development of non-conventional resources, such as treated wastewater reuse or seawater desalination. These non-conventional resources are highly energy-consuming; so, reducing energy costs is a key element in developing their use in different sectors, including agriculture. Combining photovoltai

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Sheffield, Cory S., Sue M. Westby, Robert F. Smith, and Peter G. Kevan. "Potential of bigleaf lupine for building and sustaining Osmia lignaria populations for pollination of apple." Canadian Entomologist 140, no. 5 (2008): 589–99. http://dx.doi.org/10.4039/n08-011.

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AbstractBees of the genus Osmia Panzer (Hymenoptera: Megachilidae) are among the contenders to replace honey bees, Apis mellifera L. (Apidae), for pollinating tree-fruit crops. One species, Osmia lignaria Say, has shown great potential in western North America and was recently introduced into Nova Scotia for evaluation as a pollinator of apple, Malus Mill. (Rosaceae). A major component of that study was to develop management options for O. lignaria, including methods of sustaining nesting females following crop flowering to maximize population recovery for pollination in subsequent seasons. Th

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Dolezal, Adam G., Ashley L. St. Clair, Ge Zhang, Amy L. Toth, and Matthew E. O’Neal. "Native habitat mitigates feast–famine conditions faced by honey bees in an agricultural landscape." Proceedings of the National Academy of Sciences 116, no. 50 (2019): 25147–55. http://dx.doi.org/10.1073/pnas.1912801116.

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Intensive agriculture can contribute to pollinator decline, exemplified by alarmingly high annual losses of honey bee colonies in regions dominated by annual crops (e.g., midwestern United States). As more natural or seminatural landscapes are transformed into monocultures, there is growing concern over current and future impacts on pollinators. To forecast how landscape simplification can affect bees, we conducted a replicated, longitudinal assessment of honey bee colony growth and nutritional health in an intensively farmed region where much of the landscape is devoted to production of corn

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Zagt, Roderick J. "Pre-dispersal and early post-dispersal demography, and reproductive litter production, in the tropical tree Dicymbe altsonii in Guyana." Journal of Tropical Ecology 13, no. 4 (1997): 511–26. http://dx.doi.org/10.1017/s0266467400010683.

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ABSTRACTThe demographic history of a flower-cohort of the tropical tree Dicymbe altsonii (Caesalpiniaceae) was studied by collecting litter from flowers, fruits and seeds, and by monitoring seedling survival. Flower production was estimated at 137 to 172 m−2 in a plot of 1 ha. Four percent of the flowers yielded a pod, which contained an average of 2.0 seeds. Post-dispersal mortality over 3 mo was 39% of the initial number of dispersed seeds. Most flowers and fruits were aborted. Insect and vertebrate predation in the tree and on the ground was very low. Reproductive litter production of this

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Dumas, Pascale, and Lucie Maillette. "Rapport des sexes, effort et succès de reproduction chez Rubus chamaemorus, plante herbacée vivace dioïque de distribution subarctique." Canadian Journal of Botany 65, no. 12 (1987): 2628–39. http://dx.doi.org/10.1139/b87-354.

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Studies published on the reproductive success of dioecious species concentrate on the role of sex ratios and pollinator behaviour. In the case of Rubus chamaemorus L., a circumboreal dioecious species, we hypothesized that flower survival and biomass allocation to reproductive tissues, which are climate dependent, also influence fruit production. Only 0.05% of total biomass is allocated to reproduction, whereas 94% goes to underground organs responsible for vegetative propagation. Many male (28 – 51%) and female flower buds (35 – 54%) and young fruits (24–51%) die prematurely mainly because of

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Dubois, Jonathan, and Pierre-Olivier Cheptou. "Effects of fragmentation on plant adaptation to urban environments." Philosophical Transactions of the Royal Society B: Biological Sciences 372, no. 1712 (2017): 20160038. http://dx.doi.org/10.1098/rstb.2016.0038.

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Urban ecosystems are relatively recent and heavily human-altered terrestrial ecosystems with a surprisingly high diversity of animals, plants and other organisms. Urban habitats are also strongly fragmented and subject to higher temperatures, providing a compelling model for studying adaptation to global change. Crepis sancta (Asteraceae), an annual Mediterranean wasteland weed, occupies fragmented urban environments as well as certain unfragmented landscapes in southern France. We tested for shifts in dispersal, reproductive traits and size across a rural–urban gradient to learn whether and h

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Sinha, Shuvra Kanti, Santanu Mahato, Pravas Hazari, et al. "Flies in the high for floral hike? Altitudinal variation in species diversity and composition of Diptera (Insecta) in the eastern Himalaya, India." Journal of Threatened Taxa 15, no. 11 (2023): 24241–54. http://dx.doi.org/10.11609/jott.8461.15.11.24241-24254.

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Species diversity and composition enable us to understand the conservation and management of an ecosystem. There is scarcity of knowledge in understanding the diversity change across the gradients of elevation, especially in the Himalaya. Here, we focused in the eastern Himalaya to investigate the patterns of taxonomic and functional diversity of true flies with relation to variation in altitude. The study was conducted in protected area (Neora Valley National Park) in the eastern Himalaya, India and the survey was conducted at five altitudinal zones (from 500 to 3,000 m). A total of 201 speci

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Vogel, Cassandra, Timothy L. Chunga, Xiaoxuan Sun, Katja Poveda, and Ingolf Steffan-Dewenter. "Higher bee abundance, but not pest abundance, in landscapes with more agriculture on a late-flowering legume crop in tropical smallholder farms." PeerJ 9 (February 19, 2021): e10732. http://dx.doi.org/10.7717/peerj.10732.

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Background Landscape composition is known to affect both beneficial insect and pest communities on crop fields. Landscape composition therefore can impact ecosystem (dis)services provided by insects to crops. Though landscape effects on ecosystem service providers have been studied in large-scale agriculture in temperate regions, there is a lack of representation of tropical smallholder agriculture within this field of study, especially in sub-Sahara Africa. Legume crops can provide important food security and soil improvement benefits to vulnerable agriculturalists. However, legumes are depen

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St. Clair, Ashley L., Adam G. Dolezal, Matthew E. O’Neal, and Amy L. Toth. "Pan Traps for Tracking Honey Bee Activity-Density: A Case Study in Soybeans." Insects 11, no. 6 (2020): 366. http://dx.doi.org/10.3390/insects11060366.

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To study how honey bees utilize forage resources and guide pollination management plans in crops, a multitude of methods have been developed, but most are time consuming, costly, and require specialized skills. Colored pan traps for monitoring activity-density are a simple, efficient, and cost-effective alternative; however, their usefulness for studying honey bees is not well described. We examined if trap color, location within a field, and the presence of managed colonies affected estimates of honey bee activity-density within soybean fields. Soybeans are visited by pollinators but do not r

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Miranda-Pinto, Patrícia, Jullio Kennedy Castro Soares, Irys Hany Lima Gonzalez, et al. "Biotechnological Approach for Development and Characterization of Protein Feed for Melipona quadrifasciata." Agriculture 15, no. 2 (2025): 168. https://doi.org/10.3390/agriculture15020168.

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Stingless bees are vital pollinators in tropical and neotropical regions, emphasizing the need to conserve these species. However, resource scarcity, particularly pollen, during certain periods negatively impacts bee health and pollination efficiency. To address this, we developed a fermented protein feed using microorganisms from pollen of Melipona quadrifasciata, a species commonly found in the Brazilian Atlantic Forest. The fermented feed consisted of a protein bran mixture, sugar syrup, and an inoculant derived from species’ fermented pollen. To assess the feed quality, nutritional evaluat

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Vercelli, Monica, Silvia Novelli, Paola Ferrazzi, Giada Lentini, and Chiara Ferracini. "A Qualitative Analysis of Beekeepers’ Perceptions and Farm Management Adaptations to the Impact of Climate Change on Honey Bees." Insects 12, no. 3 (2021): 228. http://dx.doi.org/10.3390/insects12030228.

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(1) Background: Bees are the primary animal pollinators in most ecosystems, and honey bees (Apis mellifera L.) are important providers of pollination ecosystem services and products. Climate change is one of the major threats for honey bees. (2) Objectives and methods: Qualitative research using focus group discussions was carried out in northwestern Italy, to investigate the beekeepers’ perceptions of climate change effects, the relevant management adaptations, and the main issues affecting the sector. (3) Results: Beekeepers reported several consequences related to severe weather events (wea

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Agraso-Otero, Adrián, Javier J. Cancela, Mar Vilanova, Javier Ugarte Andreva, Ricardo Rebolledo-Leiva, and Sara González-García. "Assessing the Environmental Sustainability of Organic Wine Grape Production with Qualified Designation of Origin in La Rioja, Spain." Agriculture 15, no. 5 (2025): 536. https://doi.org/10.3390/agriculture15050536.

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Vineyards are significant demanders of fertilisers, pesticides, soil tillage and water. This study assessed the environmental profile of an organic grape production system with La Rioja qualified designation of origin using a cradle-to-gate life cycle assessment (LCA). The ReCiPe method was applied to assess the environmental impacts, while the Available WAter REmaining method was used to estimate the water scarcity. Additionally, the biodiversity loss, a global issue exacerbated by agricultural practices, was evaluated along with an ecosystem service indicator, pollination, to provide a more

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Carydi, Io, Athanasios Koutsianas, and Marios Desyllas. "People, Crops, and Bee Farming: Landscape Models for a Symbiotic Network in Greece." Land 12, no. 2 (2023): 430. http://dx.doi.org/10.3390/land12020430.

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Despite the rising awareness of the mutual benefits of pollination, agricultural production, and biodiversity, Greek planning has scarcely moved toward patterns of pollinator-friendly farm design models. This paper presents data from preliminary research analysis that defined generic landscape design models that can enhance the symbiotic associations between farming production and beekeeping in Greece. The main objective is to determine tailor-made landscape models that can contribute to a portfolio of actions easily apprehensible by non-technical audiences in the farming sector who want to in

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Flicker, Nathaniel Ryan, Katja Poveda, and Heather Grab. "The Bee Community of Cannabis sativa and Corresponding Effects of Landscape Composition." Environmental Entomology 49, no. 1 (2019): 197–202. http://dx.doi.org/10.1093/ee/nvz141.

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Abstract Industrial hemp, Cannabis sativa (Cannabaceae), is a newly introduced and rapidly expanding crop in the American agricultural landscape. As an exclusively wind-pollinated crop, hemp lacks nectar but produces an abundance of pollen during a period of floral dearth in agricultural landscapes. These pollen resources are attractive to a range of bee species but the diversity of floral visitors and their use of hemp across a range of agricultural contexts remains unclear. We made repeated sweep net collections of bees visiting hemp flowers on farms in New York, which varied in both landsca

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Denisow, Bożena, Sebastian Antoń, and Małgorzata Wrzesień. "Morphology of Anemone sylvestris L. flower (Ranunculaceae)." Acta Botanica Croatica 75, no. 1 (2016): 74–80. http://dx.doi.org/10.1515/botcro-2016-0009.

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Abstract During the monitoring of populations of Anemone sylvestris L. (Ranunculaceae), a protected species in Poland, we found that the seed set is impaired. The flower is considered an adaptation that has coevolved to achieve effective pollination and successful fertilization. Therefore we have focused on the morphological and anatomical characteristics of the flowers of A. sylvestris L. as a prelude to the study of the species’ pollination biology and plant breeding system. The large size of the flower (50.6 ± 16.4 mm in dimensions) and its bowl shape fulfil both the biotic pollination synd

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Pashalidou, Foteini G., Harriet Lambert, Thomas Peybernes, Mark C. Mescher, and Consuelo M. De Moraes. "Bumble bees damage plant leaves and accelerate flower production when pollen is scarce." Science 368, no. 6493 (2020): 881–84. http://dx.doi.org/10.1126/science.aay0496.

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Maintaining phenological synchrony with flowers is a key ecological challenge for pollinators that may be exacerbated by ongoing environmental change. Here, we show that bumble bee workers facing pollen scarcity damage leaves of flowerless plants and thereby accelerate flower production. Laboratory studies revealed that leaf-damaging behavior is strongly influenced by pollen availability and that bee-damaged plants flower significantly earlier than undamaged or mechanically damaged controls. Subsequent outdoor experiments showed that the intensity of damage inflicted varies with local flower a

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Boechat, Rafael Ferreira, Bianca Ferreira da Silva, and André Felippe Nunes-Freitas. "Bird-epiphyte interactions in three Atlantic Forest environments in southeastern Brazil." Revista Brasileira de Ornitologia 27, no. 2 (2019): 108–14. http://dx.doi.org/10.1007/bf03544454.

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AbstractEpiphytes reach up to 67% of the total plant species richness in some tropical areas and act as diverse food resources that can be crucial in times of food scarcity. The avifauna assists in their reproduction, either through pollination or seed dispersal, thus creating a vast interaction spectrum between both communities within a continuous ecological process. Few scientific studies concerning avian and epiphytic community interactions are available and not much is known on their specific relationships. However, their absence can change existing ecological processes in habitats. With t

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Catania, Roberto, Maria Augusta Pereira Lima, Michele Potrich, Fabio Sgolastra, Lucia Zappalà, and Gaetana Mazzeo. "Are Botanical Biopesticides Safe for Bees (Hymenoptera, Apoidea)?" Insects 14, no. 3 (2023): 247. http://dx.doi.org/10.3390/insects14030247.

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The recent global decline in insect populations is of particular concern for pollinators. Wild and managed bees (Hymenoptera, Apoidea) are of primary environmental and economic importance because of their role in pollinating cultivated and wild plants, and synthetic pesticides are among the major factors contributing to their decline. Botanical biopesticides may be a viable alternative to synthetic pesticides in plant defence due to their high selectivity and short environmental persistence. In recent years, scientific progress has been made to improve the development and effectiveness of thes

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Ngamsert, Ratsuda, Rapeepat Techarungruengsakul, Siwa Kaewplang, et al. "Optimizing Solution in Decision Supporting System for River Basin Management Consisting of a Reservoir System." Water 15, no. 14 (2023): 2510. http://dx.doi.org/10.3390/w15142510.

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Decision support systems tackle problems and require systematic planning. They consider physical data, hydrological data, and sediment levels to achieve efficiency and adaptability in various situations. Therefore, this research aims to identify alternative engineering choices for the management of a river basin with a single reservoir system. Optimization techniques, including marine predator algorithm (MPA), genetic algorithm (GA), genetic programming (GP), tabu search (TS), and flower pollination algorithm (FPA), were applied to find the optimal reservoir rule curves using a reservoir simul

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Ganesh, T., and Priya Davidar. "Flowering phenology and flower predation of Cullenia exarillata (Bombacaceae) by arboreal vertebrates in Western Ghats, India." Journal of Tropical Ecology 13, no. 3 (1997): 459–68. http://dx.doi.org/10.1017/s0266467400010622.

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ABSTRACTThe flowering phenology and flower predation of Cullenia exarillata, a canopy tree at Kakachi in the southern Western Ghats, India, was studied from 1991 to 1993 in relation to general phenological patterns at the community level. Flowering was monitored from 30 marked trees and flower predation estimated from fallen flowers in 40, 1 m2 nets placed under the trees. Flowering occurs in the dry season and coincides with the period of fruit scarcity in the forest. Flowering is synchronous in the population and each tree produces a mean of c. 8730 flowers per tree over a period of c. 47 d.

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Sánchez-Estrada, Alberto, and Julián Cuevas. "Profitability of Artificial Pollination in ‘Manzanillo’ Olive Orchards." Agronomy 10, no. 5 (2020): 652. http://dx.doi.org/10.3390/agronomy10050652.

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The fruit set in monovarietal ‘Manzanillo’ olive orchards is significantly increased under cross-pollination. This response lead to pollination designs including pollinizer selection, the number of pollinizer trees per hectare and their distribution in the orchard. However, the assignment of a substantial area to pollinizers of lesser commercial value might decrease profits. The strong influence of variable climates on the overlap of the blooming phenology of ‘Manzanillo’ and its pollinizer, and on pollen production and dispersal, are also notable risks. Artificial pollination is a feasible al

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Jéssica Figuera Oliveira Miranda, Joelma Araujo dos Santos, Maria Dolores Ribeiro Orge, and José Antonio da Silva Dantas. "Bibliometric Analysis of Ornithophilous Species of Bromeliaceae in the Atlantic Forest." JOURNAL OF BIOENGINEERING, TECHNOLOGIES AND HEALTH 7, Suppl1 (2025): 56–65. https://doi.org/10.34178/jbth.v7isuppl1.443.

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This bibliometric analysis quantified the articles published on ornithophilous species of Bromeliaceae in the Atlantic Forest biome, demonstrating the scarcity of studies and the need for work to reduce the knowledge of this plant-animal relationship in the state of Bahia (Brazil). The bibliometric analysis of ornithophilous species of Bromeliaceae in the Atlantic Forest in the time cut from 1996 to 2024, with the first filter of the expressions "ornithophilia, Bromeliaceae, Atlantic Forest", selected 251 articles from 819 authors in 96 journals from 23 countries, with Brazil highlighted by 11

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Colombo, Ronan Carlos, Maria Aparecida Da Cruz, Deived Uilian Carvalho, Rodrigo Thibes Hoshino, Guilherme Augusto Cito Alves, and Ricardo Tadeu De Faria. "Adenium obesum as a new potted flower: growth management." Ornamental Horticulture 24, no. 3 (2018): 197–205. http://dx.doi.org/10.14295/oh.v24i3.1226.

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Adenium obesum, also known as desert rose, has recently become popular in Brazil, due to its exuberance and sculptural shape. However, the production of the species in commercial scale has been facing challenges regarding propagation of hybrids by in vitro cultivation techniques, potting medium composition, irrigation and fertilization management, disease and pest control. Unlike other species sold as potted plants, there are no commercial production protocols established for Adenium, mainly due to the scarcity of technical information about this species. Thus, this technical article aimed to

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