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Sánchez‐Collazo XM, Figueroa‐Castro DM, Cruz JA, Castañeda‐Posadas C. Relative importance of two bat species as pollinators of
Neobuxbaumia tetetzo
(Cactaceae): Evidences from morphometric and pollen load analyses. Ecol Res 2023. [DOI: 10.1111/1440-1703.12384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
| | | | - José Alberto Cruz
- Facultad de Ciencias Biológicas, Benemérita Universidad Autónoma de Puebla Puebla Mexico
- Instituto Nacional de Antropología e Historia Moneda 16, Col. Centro, Del. Cuauhtémoc Mexico
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Sánchez-Castro D, Armbruster G, Willi Y. Reduced pollinator service in small populations of Arabidopsis lyrata at its southern range limit. Oecologia 2022; 200:107-117. [PMID: 36053350 PMCID: PMC9547784 DOI: 10.1007/s00442-022-05237-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 07/27/2022] [Indexed: 11/28/2022]
Abstract
Even though a high fraction of angiosperm plants depends on animal pollinators for sexual reproduction, little is known how pollinator service changes across the ranges of plant species and whether it may contribute to range limits. Here, we tested for variation in pollinator service in the North American Arabidopsis lyrata from its southern to northern range edge and evaluated the driving mechanisms. We monitored insect pollinators using time-lapse cameras in 13 populations over two years and spotted 67 pollinating insect taxa, indicating the generalist nature of this plant-pollinator system. Pollinator service was highest at intermediate local flower densities and higher in large compared to small plant populations. Southern populations had generally smaller population sizes, and visitation rate and pollination ratio decreased with latitude. We also found that pollinator visitation was positively correlated with the richness of other flowering plants. This study indicates that plant populations at southern range edges receive only marginal pollinator service if they are small, and the effect of lower pollination is also detectable within populations across the range when the local flower density is low. Results, therefore, suggest the potential for an Allee effect in pollination that manifests itself across spatial scales.
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Affiliation(s)
- Darío Sánchez-Castro
- Department of Environmental Sciences, University of Basel, 4056 Basel, Switzerland
| | - Georg Armbruster
- Department of Environmental Sciences, University of Basel, 4056 Basel, Switzerland
| | - Yvonne Willi
- Department of Environmental Sciences, University of Basel, 4056 Basel, Switzerland
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Baksay S, Andalo C, Galop D, Burrus M, Escaravage N, Pornon A. Using Metabarcoding to Investigate the Strength of Plant-Pollinator Interactions From Surveys of Visits to DNA Sequences. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.735588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The ongoing decline in pollinators and increasing concerns about pollination services require a better understanding of complex pollination networks, particularly their response to global climate change. While metabarcoding is increasingly used for the identification of taxa in DNA mixtures, its reliability in providing quantitative information on plant-pollinator interactions is still the subject of debate. Combining metabarcoding and microscopy, we investigated the relationships between the number and composition of sequences and the abundance and composition of pollen in insect pollen loads (IPL) and how the two are linked to insect visits. Our findings confirm that metabarcoding is more effective than microscopy in identifying plant species in IPL. For a given species, we found a strong positive relationship between the amount of pollen in IPL and the number of sequences. The relationship was stable across species even if the abundance of co-occurring species in IPL (hereafter “co-occurring pollen”) tended to reduce the sequence yield (number of sequences obtained from one pollen grain) of a given species. We also found a positive relationship between the sequence count and the frequency of visits, and between the frequency and the amounts of pollen in IPL. Our results demonstrate the reliability of metabarcoding in assessing the strength of plant-pollinator interactions and in providing a broader perspective for the analyses of plant-pollinator interactions and pollination networks.
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Tian H, Harder LD, Wang A, Zhang D, Liao W. Habitat effects on reproductive phenotype, pollinator behavior, fecundity, and mating outcomes of a bumble bee-pollinated herb. AMERICAN JOURNAL OF BOTANY 2022; 109:470-485. [PMID: 35244204 PMCID: PMC9314043 DOI: 10.1002/ajb2.1826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
PREMISE Fecundity and mating outcomes commonly differ among plant populations occupying contrasting environments. If self-pollination occurs primarily among flowers within plants, contrasting reproductive outcomes among populations must reflect environmental effects on plant-pollinator interactions. Specifically, local conditions could affect features of plant phenotypes that influence pollinator behavior, in turn modifying plant reproductive outcomes. METHODS We compared phenotypes, pollinator abundance and behavior, and female fecundity and mating in two meadow populations and two forest populations of Aconitum kusnezoffii within 3 km of each other. Mating outcomes were assessed using microsatellites. RESULTS Meadow plants generally produced more, shorter ramets with more, larger flowers, but less nectar per flower than forest plants. These differences likely largely represent phenotypic plasticity. Individual bumble bees visited more flowers on forest plants, likely because the more abundant bees in the meadows depleted nectar availability, as indicated by briefer visits to individual flowers. Despite similar fruit set in both habitats, forest plants set more seeds per fruit. Nevertheless, meadow plants produced more seeds overall, owing to sevenfold greater flower production. Consistent with individual bees visiting fewer flowers on meadow plants, more of their seeds were outcrossed. However, the outcrossed seeds of forest plants included more male mates. CONCLUSIONS Reproductive outcomes can vary among populations of animal-pollinated plants as a result of differences in the availability of effective pollinators and environmental effects on plant phenotypes, and their functional consequences for pollinator behavior that governs pollen dispersal.
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Affiliation(s)
- Hao Tian
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringBeijing Normal UniversityBeijing100875China
| | - Lawrence D. Harder
- Department of Biological SciencesUniversity of CalgaryCalgaryAlbertaT2N 1N4Canada
| | - Ai‐Ying Wang
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringBeijing Normal UniversityBeijing100875China
| | - Da‐Yong Zhang
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringBeijing Normal UniversityBeijing100875China
| | - Wan‐Jin Liao
- State Key Laboratory of Earth Surface Processes and Resource Ecology, Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringBeijing Normal UniversityBeijing100875China
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5
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Baksay S, Pornon A, Burrus M, Mariette J, Andalo C, Escaravage N. Experimental quantification of pollen with DNA metabarcoding using ITS1 and trnL. Sci Rep 2020; 10:4202. [PMID: 32144370 PMCID: PMC7060345 DOI: 10.1038/s41598-020-61198-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/18/2020] [Indexed: 11/09/2022] Open
Abstract
Although the use of metabarcoding to identify taxa in DNA mixtures is widely approved, its reliability in quantifying taxon abundance is still the subject of debate. In this study we investigated the relationships between the amount of pollen grains in mock solutions and the abundance of high-throughput sequence reads and how the relationship was affected by the pollen counting methodology, the number of PCR cycles, the type of markers and plant species whose pollen grains have different characteristics. We found a significant positive relationship between the number of DNA sequences and the number of pollen grains in the mock solutions. However, better relationships were obtained with light microscopy as a pollen grain counting method compared with flow cytometry, with the chloroplastic trnL marker compared with ribosomal ITS1 and with 30 when compared with 25 or 35 PCR cycles. We provide a list of recommendations to improve pollen quantification.
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Affiliation(s)
- Sandra Baksay
- Laboratoire Evolution and Diversité Biologique EDB, CNRS, UMR 5174, Université Toulouse III Paul Sabatier, F-31062, Toulouse, France.
| | - André Pornon
- Laboratoire Evolution and Diversité Biologique EDB, CNRS, UMR 5174, Université Toulouse III Paul Sabatier, F-31062, Toulouse, France
| | - Monique Burrus
- Laboratoire Evolution and Diversité Biologique EDB, CNRS, UMR 5174, Université Toulouse III Paul Sabatier, F-31062, Toulouse, France
| | - Jérôme Mariette
- Plate-forme Bio-informatique Genotoul, Mathématiques et Informatique Appliqués INRA, UR875, Toulouse, F-31320, Castanet-Tolosan, France
| | - Christophe Andalo
- Laboratoire Evolution and Diversité Biologique EDB, CNRS, UMR 5174, Université Toulouse III Paul Sabatier, F-31062, Toulouse, France
| | - Nathalie Escaravage
- Laboratoire Evolution and Diversité Biologique EDB, CNRS, UMR 5174, Université Toulouse III Paul Sabatier, F-31062, Toulouse, France
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Pornon A, Baksay S, Escaravage N, Burrus M, Andalo C. Pollinator specialization increases with a decrease in a mass-flowering plant in networks inferred from DNA metabarcoding. Ecol Evol 2019; 9:13650-13662. [PMID: 31938472 PMCID: PMC6953672 DOI: 10.1002/ece3.5531] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/02/2019] [Accepted: 07/16/2019] [Indexed: 01/03/2023] Open
Abstract
How native mass-flowering plants affect the specialization of insects at individual and species levels and the consequences for pollination networks have received much less attention than for mass-flowering crops or alien species and basically remain unexplored.Using existing DNA metabarcoding data on the pollen loads of 402 flower-visiting insects, we assessed the effects of a native mass-flowering plant of high reward quality, the shrub Rhododendron ferrugineum, on pollination networks by investigating: (a) the food niches of individual pollinators and pollinator species and (b) the structure of individual and species networks in subalpine heathland patches with extremely contrasted densities of R. ferrugineum.Relative to its high abundance in high-density patches, the shrub was greatly underrepresented and did not dominate individual's or species' generalized networks, rather individual and species specialization increased with a decrease in R. ferrugineum density. Furthermore, individuals of the more generalist dipteran Empididae species tended to extend exclusive interactions with rare plant species in low-density networks. The same trend was observed in the more specialist Apidea but toward rare species in high-density networks. Our results reveal a quite paradoxical view of pollination and a functional complementarity within networks. Niche and network indices mostly based on the occurrence of links showed that individual pollinators and pollinator species and networks were highly generalized, whereas indices of link strength revealed that species and above all individuals behave as quite strict specialists. Synthesis. Our study provides insights into the status of a native mass-flowering plant in individual's and insect species' food niches and pollination networks. It revealed that a generalist pollinator species can be highly specialized at the individual level and how rare plant species coexisting with mass-flowering plants may nevertheless be visited.
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Affiliation(s)
- André Pornon
- Laboratoire Evolution et Diversité BiologiqueUMR 5174CNRSIRDUniversité Toulouse III Paul SabatierToulouseFrance
| | - Sandra Baksay
- Laboratoire Evolution et Diversité BiologiqueUMR 5174CNRSIRDUniversité Toulouse III Paul SabatierToulouseFrance
| | - Nathalie Escaravage
- Laboratoire Evolution et Diversité BiologiqueUMR 5174CNRSIRDUniversité Toulouse III Paul SabatierToulouseFrance
| | - Monique Burrus
- Laboratoire Evolution et Diversité BiologiqueUMR 5174CNRSIRDUniversité Toulouse III Paul SabatierToulouseFrance
| | - Christophe Andalo
- Laboratoire Evolution et Diversité BiologiqueUMR 5174CNRSIRDUniversité Toulouse III Paul SabatierToulouseFrance
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Daniels JD, Arceo-Gómez G. Effects of invasive Cirsium arvense on pollination in a southern Appalachian floral community vary with spatial scale and floral symmetry. Biol Invasions 2019. [DOI: 10.1007/s10530-019-02130-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Perrot T, Gaba S, Roncoroni M, Gautier JL, Saintilan A, Bretagnolle V. Experimental quantification of insect pollination on sunflower yield, reconciling plant and field scale estimates. Basic Appl Ecol 2019. [DOI: 10.1016/j.baae.2018.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Ison JL, Prescott LJ, Nordstrom SW, Waananen A, Wagenius S. Pollinator-mediated mechanisms for increased reproductive success in early flowering plants. OIKOS 2018. [DOI: 10.1111/oik.04882] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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DNA metabarcoding data unveils invisible pollination networks. Sci Rep 2017; 7:16828. [PMID: 29203872 PMCID: PMC5715002 DOI: 10.1038/s41598-017-16785-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 11/13/2017] [Indexed: 11/18/2022] Open
Abstract
Animal pollination, essential for both ecological services and ecosystem functioning, is threatened by ongoing global changes. New methodologies to decipher their effects on pollinator composition to ecosystem health are urgently required. We compare the main structural parameters of pollination networks based on DNA metabarcoding data with networks based on direct observations of insect visits to plants at three resolution levels. By detecting numerous additional hidden interactions, metabarcoding data largely alters the properties of the pollination networks compared to visit surveys. Molecular data shows that pollinators are much more generalist than expected from visit surveys. However, pollinator species were composed of relatively specialized individuals and formed functional groups highly specialized upon floral morphs. We discuss pros and cons of metabarcoding data relative to data obtained from traditional methods and their potential contribution to both current and future research. This molecular method seems a very promising avenue to address many outstanding scientific issues at a resolution level which remains unattained to date; especially for those studies requiring pollinator and plant community investigations over macro-ecological scales.
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Stanley J, Sah K, Subbanna AR, Preetha G, Gupta J. How Efficient Is Apis cerana (Hymenoptera: Apidae) in Pollinating Cabbage, Brassica oleracea var. capitata? Pollination Behavior, Pollinator Effectiveness, Pollinator Requirement, and Impact of Pollination. JOURNAL OF ECONOMIC ENTOMOLOGY 2017; 110:826-834. [PMID: 28444378 DOI: 10.1093/jee/tox115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Indexed: 06/07/2023]
Abstract
Cabbage is a cross-pollinated crop because of sporophytic self-incompatibility, and honey bees play an important role in its pollination. Though Asian honey bees, Apis cerana F., are used in pollination of cabbage, the rate of visitation, behavior, pollinator efficacy, and impact on seed-set are to be determined. Apis cerana occupy a share of 19.18% of all the flower visitors of cabbage in natural habitat of North Western Indian Himalayas. Pollination behavior in terms of peak activity, flowers processed per unit time, time spent per flower, and time spent in search of flowers are studied separately for both pollen and nectar foragers. Pollinator effectiveness as measured by seed set in flowers excluded from bee visitation, single bee visit, and unrestricted pollinator visits was 0.11. Studies on the impact of A. cerana bee pollination in cabbage seed production revealed an increase of 17.28% in siliqua per panicle, with 26.11% increase in seed yield. For assessing the requirement of A. cerana to pollinate one hectare of cabbage, flower availability and the speed with which the pollen and nectar foragers process the flowers are taken into consideration. A forager is estimated to pollinate 4,780 flowers a day, but cabbage flower requires 9.09 visits of A. cerana for optimum seed set. Thus, a maximum of 4,999 bee foragers or 8.33 colonies are needed to effectively pollinate 1 ha of cabbage. Though A. cerana is a good pollinator, our findings suggest that it is not an ideal pollinator of cabbage.
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Affiliation(s)
- Johnson Stanley
- ICAR-Vivekananda Parvatiya Krishi Anusandhan Sansthan, Almora, Uttarakhand, India ( ; ; ; ; )
- Corresponding author, e-mail:
| | - Khushboo Sah
- ICAR-Vivekananda Parvatiya Krishi Anusandhan Sansthan, Almora, Uttarakhand, India (; ; ; ; )
| | - Avupati Rns Subbanna
- ICAR-Vivekananda Parvatiya Krishi Anusandhan Sansthan, Almora, Uttarakhand, India (; ; ; ; )
| | - G Preetha
- ICAR-Vivekananda Parvatiya Krishi Anusandhan Sansthan, Almora, Uttarakhand, India (; ; ; ; )
| | - JaiPrakash Gupta
- ICAR-Vivekananda Parvatiya Krishi Anusandhan Sansthan, Almora, Uttarakhand, India (; ; ; ; )
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