NECTAR BARRIER FOR BIRDS IN ANISACANTHUS (ACANTHACEAE) A KEYHOLE BARRIER.
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| Title: | NECTAR BARRIER FOR BIRDS IN ANISACANTHUS (ACANTHACEAE) A KEYHOLE BARRIER. |
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| Authors: | Manktelow, Mariette1 (AUTHOR) mariette.manktelow@ebc.uu.se |
| Source: | Southwestern Naturalist. Jun2026, Vol. 70 Issue 2, p1-11. 11p. |
| Subjects: | Acanthaceae, Hummingbirds, Insect pollinators, Pollination, Species |
| Abstract (English): | This study describes a nectar barrier for birds in the hummingbird pollinated genus Anisacanthus (Acanthaceae). The most studied species is A. thurberi, but similar structures suggest a presence of a nectar barrier also in A. andersonii, A. junceus, A. linearis, A. pumilus, A. quadrifidus var. brevilobus, and A. quadrifidus var. wrightii. Similar structures were present but more weakly expressed in A. tetracaulis and A. puberulus, species that will need more detailed studies. When mimicking a hummingbird beak with a tweezer, I found that a visiting hummingbird would be able to move the style downwards in the nectar barrier to open a hole into the nectar chamber. I name the nectar barrier a Keyhole Barrier due to its appearance. A similar nectar barrier is present in Mexacanthus mcvaughii, a species now nested within Anisacanthus, and differences in that species could be due to an adaptation to insect pollination. [ABSTRACT FROM AUTHOR] |
| Abstract (Spanish): | Este estudio describe una barrera de néctar para aves en el género Anisacanthus (Acanthaceae), polinizado por colibríes. La especie más estudiada es A. thurberi, aunque estructuras similares sugieren la presencia de una barrera de néctar también en A. andersonii, A. junceus, A. linearis, A. pumilus, A. quadrifidus var. brevilobus y A. quadrifidus var. wrightii. Estructuras similares estaban presentes, con una expresion más débil, en A. tetracaulis y A. puberulus que requerirán estudios más detallados. Al imitar el pico del colibrí con una pinza, observé que un colibrí visitante podría mover el pistilo hacia abajo dentro de la barrera de néctar para abrir un orificio hacia la cámara de néctar. He nombrado a esta barrera de néctar como Barrera de Cerradura debido a su apariencia. Una barrera de néctar similar está presente en Mexacanthus mcvaughii, una especie actualmente incluida dentro de Anisacanthus, y las diferencias en esa especie podrían deberse a una adaptación a la polinización por insectos. [ABSTRACT FROM AUTHOR] |
| Copyright of Southwestern Naturalist is the property of Southwestern Association of Naturalists and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 193503766 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: NECTAR BARRIER FOR BIRDS IN ANISACANTHUS (ACANTHACEAE) A KEYHOLE BARRIER. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Manktelow%2C+Mariette%22">Manktelow, Mariette</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mariette.manktelow@ebc.uu.se</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Southwestern+Naturalist%22">Southwestern Naturalist</searchLink>. Jun2026, Vol. 70 Issue 2, p1-11. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Acanthaceae%22">Acanthaceae</searchLink><br /><searchLink fieldCode="DE" term="%22Hummingbirds%22">Hummingbirds</searchLink><br /><searchLink fieldCode="DE" term="%22Insect+pollinators%22">Insect pollinators</searchLink><br /><searchLink fieldCode="DE" term="%22Pollination%22">Pollination</searchLink><br /><searchLink fieldCode="DE" term="%22Species%22">Species</searchLink> – Name: Abstract Label: Abstract (English) Group: Ab Data: This study describes a nectar barrier for birds in the hummingbird pollinated genus Anisacanthus (Acanthaceae). The most studied species is A. thurberi, but similar structures suggest a presence of a nectar barrier also in A. andersonii, A. junceus, A. linearis, A. pumilus, A. quadrifidus var. brevilobus, and A. quadrifidus var. wrightii. Similar structures were present but more weakly expressed in A. tetracaulis and A. puberulus, species that will need more detailed studies. When mimicking a hummingbird beak with a tweezer, I found that a visiting hummingbird would be able to move the style downwards in the nectar barrier to open a hole into the nectar chamber. I name the nectar barrier a Keyhole Barrier due to its appearance. A similar nectar barrier is present in Mexacanthus mcvaughii, a species now nested within Anisacanthus, and differences in that species could be due to an adaptation to insect pollination. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Abstract (Spanish) Group: Ab Data: Este estudio describe una barrera de néctar para aves en el género Anisacanthus (Acanthaceae), polinizado por colibríes. La especie más estudiada es A. thurberi, aunque estructuras similares sugieren la presencia de una barrera de néctar también en A. andersonii, A. junceus, A. linearis, A. pumilus, A. quadrifidus var. brevilobus y A. quadrifidus var. wrightii. Estructuras similares estaban presentes, con una expresion más débil, en A. tetracaulis y A. puberulus que requerirán estudios más detallados. Al imitar el pico del colibrí con una pinza, observé que un colibrí visitante podría mover el pistilo hacia abajo dentro de la barrera de néctar para abrir un orificio hacia la cámara de néctar. He nombrado a esta barrera de néctar como Barrera de Cerradura debido a su apariencia. Una barrera de néctar similar está presente en Mexacanthus mcvaughii, una especie actualmente incluida dentro de Anisacanthus, y las diferencias en esa especie podrían deberse a una adaptación a la polinización por insectos. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Southwestern Naturalist is the property of Southwestern Association of Naturalists and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=193503766 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1894/0038-4909-70.2.7 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 1 Subjects: – SubjectFull: Acanthaceae Type: general – SubjectFull: Hummingbirds Type: general – SubjectFull: Insect pollinators Type: general – SubjectFull: Pollination Type: general – SubjectFull: Species Type: general Titles: – TitleFull: NECTAR BARRIER FOR BIRDS IN ANISACANTHUS (ACANTHACEAE) A KEYHOLE BARRIER. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Manktelow, Mariette IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00384909 Numbering: – Type: volume Value: 70 – Type: issue Value: 2 Titles: – TitleFull: Southwestern Naturalist Type: main |
| ResultId | 1 |
