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Jia S, Yang B, Du J, Xie Y, Yu L, Zhang Y, Tao T, Tang W, Gong J. Uncovering the Recent Progress of CNC-Derived Chirality Nanomaterials: Structure and Functions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2401664. [PMID: 38651220 DOI: 10.1002/smll.202401664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 04/10/2024] [Indexed: 04/25/2024]
Abstract
Cellulose nanocrystal (CNC), as a renewable resource, with excellent mechanical performance, low thermal expansion coefficient, and unique optical performance, is becoming a novel candidate for the development of smart material. Herein, the recent progress of CNC-based chirality nanomaterials is uncovered, mainly covering structure regulations and function design. Undergoing a simple evaporation process, the cellulose nanorods can spontaneously assemble into chiral nematic films, accompanied by a vivid structural color. Various film structure-controlling strategies, including assembly means, physical modulation, additive engineering, surface modification, geometric structure regulation, and external field optimization, are summarized in this work. The intrinsic correlation between structure and performance is emphasized. Next, the applications of CNC-based nanomaterials is systematically reviewed. Layer-by-layer stacking structure and unique optical activity endow the nanomaterials with wide applications in the mineralization, bone regeneration, and synthesis of mesoporous materials. Besides, the vivid structural color broadens the functions in anti-counterfeiting engineering, synthesis of the shape-memory and self-healing materials. Finally, the challenges for the CNC-based nanomaterials are proposed.
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Affiliation(s)
- Shengzhe Jia
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Bingbing Yang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Jing Du
- Department of Chemistry, Institute of Molecular Aggregation Science, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin, 300072, China
| | - Yujiang Xie
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Liuyang Yu
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Yuan Zhang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Tiantian Tao
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Weiwei Tang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
- Collaborative Innovation Center of Chemistry Science and Engineering, Tianjin, 300072, China
| | - Junbo Gong
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
- Collaborative Innovation Center of Chemistry Science and Engineering, Tianjin, 300072, China
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2
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Sahanashree R, Punnath A, Rajan Priyadarsanan D. A remarkable new species of Paraparatrechina Donisthorpe (1947) (Hymenoptera, Formicidae, Formicinae) from the Eastern Himalayas, India. Zookeys 2024; 1203:159-172. [PMID: 38855795 PMCID: PMC11161688 DOI: 10.3897/zookeys.1203.114168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 04/16/2024] [Indexed: 06/11/2024] Open
Abstract
A new ant species, Paraparatrechinaneela sp. nov., with a captivating metallic-blue color is described based on the worker caste from the East Siang district of Arunachal Pradesh, northeastern India. This discovery signifies the first new species of Paraparatrechina in 121 years, since the description of the sole previously known species, P.aseta (Forel, 1902), in the Indian subcontinent.
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Affiliation(s)
- Ramakrishnaiah Sahanashree
- Ashoka Trust for Research in Ecology and the Environment, Royal Enclave, Srirampura, Jakkur Post, Bengaluru – 560064, Karnataka, IndiaAshoka Trust for Research in Ecology and the EnvironmentBengaluruIndia
| | - Aswaj Punnath
- Entomology and Nematology Department, University of Florida, 1881 Natural Area Drive, Gainesville, FL, 32611, USAUniversity of FloridaGainesvilleUnited States of America
| | - Dharma Rajan Priyadarsanan
- Ashoka Trust for Research in Ecology and the Environment, Royal Enclave, Srirampura, Jakkur Post, Bengaluru – 560064, Karnataka, IndiaAshoka Trust for Research in Ecology and the EnvironmentBengaluruIndia
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3
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Nicolaï MPJ, Debruyn G, Soenens M, Shawkey MD, D’Alba L. Nanoscale millefeuilles produce iridescent bill ornaments in birds. PNAS NEXUS 2024; 3:pgae138. [PMID: 38638835 PMCID: PMC11026107 DOI: 10.1093/pnasnexus/pgae138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 03/25/2024] [Indexed: 04/20/2024]
Abstract
Colors are well studied in bird plumage but not in other integumentary structures. In particular, iridescent colors from structures other than plumage are undescribed in birds. Here, we show that a multilayer of keratin and lipids is sufficient to produce the iridescent bill of Spermophaga haematina. Furthermore, that the male bill is presented to the female under different angles during display provides support for the hypothesis that iridescence evolved in response to sexual selection. This is the first report of an iridescent bill, and only the second instance of iridescence in birds in which melanosomes are not involved. Furthermore, an investigation of museum specimens of an additional 98 species, showed that this evolved once, possibly twice. These results are promising, as they suggest that birds utilize a wider array of physical phenomena to produce coloration and should further stimulate research on nonplumage integumentary colors.
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Affiliation(s)
- Michaël P J Nicolaï
- Department of Biology, Evolution and Optics of Nanostructures Group, University of Ghent, Ledeganckstraat 35, 9000 Gent, Belgium
- Department of Recent Vertebrates, Royal Belgian Institute of Natural Sciences, Vautierstraat 29, 1050 Brussels, Belgium
- Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA
| | - Gerben Debruyn
- Department of Biology, Evolution and Optics of Nanostructures Group, University of Ghent, Ledeganckstraat 35, 9000 Gent, Belgium
| | - Mieke Soenens
- Department of Biology, Evolution and Optics of Nanostructures Group, University of Ghent, Ledeganckstraat 35, 9000 Gent, Belgium
| | - Matthew D Shawkey
- Department of Biology, Evolution and Optics of Nanostructures Group, University of Ghent, Ledeganckstraat 35, 9000 Gent, Belgium
| | - Liliana D’Alba
- Department of Biology, Evolution and Optics of Nanostructures Group, University of Ghent, Ledeganckstraat 35, 9000 Gent, Belgium
- Naturalis Biodiversity Center, Darwinweg 2, 2333 CR Leiden, The Netherlands
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4
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Roggero A, Alù D, Laini A, Rolando A, Palestrini C. Color polymorphism and mating trends in a population of the alpine leaf beetle Oreina gloriosa. PLoS One 2024; 19:e0298330. [PMID: 38530852 DOI: 10.1371/journal.pone.0298330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 01/18/2024] [Indexed: 03/28/2024] Open
Abstract
The bright colors of Alpine leaf beetles (Coleoptera, Chrysomelidae) are thought to act as aposematic signals against predation. Within the European Alps, at least six species display a basal color of either blue or green, likely configuring a classic case of müllerian mimicry. In this context, intra-population color polymorphism is paradoxical as the existence of numerous color morphs might hamper the establishment of a search image in visual predators. Assortative mating may be one of the main factors contributing to the maintenance of polymorphic populations. Due to the marked iridescence of these leaf beetles, the perceived color may change as the viewing or illumination angle changes. The present study, conducted over three years, involved intensive sampling of a population of Oreina gloriosa from the Italian Alps and applied colorimetry and a decision tree method to identify the color morphs in an objective manner. The tertiary sex ratio of the population was biased in favor of males, suggesting that viviparous females hide to give birth. Seven color morphs were identified, and their frequencies varied significantly over the course of the study. Three different analyses of mating (JMating, QInfomating, and Montecarlo simulations) recognized a general trend for random mating which coexists with some instances of positive and negative assortative mating. This could help explain the pre-eminence of one morph (which would be favored because of positive selection due to positive assortative mating) in parallel with the persistence of six other morphs (maintained due to negative assortative mating).
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Affiliation(s)
- Angela Roggero
- Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
| | - Daniele Alù
- Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
| | - Alex Laini
- Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
| | - Antonio Rolando
- Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
| | - Claudia Palestrini
- Department of Life Sciences and Systems Biology, University of Turin, Torino, Italy
- NBFC, National Biodiversity Future Center, Palermo, Italy
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5
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Fleitas AG, Sardar S, Arnould-Pétré MM, Murace M, Vignolini S, Brodie J, Lanzani G, D'Andrea C. Influence of structural colour on the photoprotective mechanism in the gametophyte phase of the red alga Chondrus crispus. J R Soc Interface 2024; 21:20230676. [PMID: 38378137 PMCID: PMC10878799 DOI: 10.1098/rsif.2023.0676] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 01/26/2024] [Indexed: 02/22/2024] Open
Abstract
Marine life is populated by a huge diversity of organisms with an incredible range of colour. While structural colour mechanisms and functions are usually well studied in marine animal species, there is a huge knowledge gap regarding the marine macroalgae (red, green and brown seaweeds) that have structural coloration and the biological significance of this phenomenon in these photosynthetic organisms. Here we show that structural colour in the gametophyte life history phase of the red alga Chondrus crispus plays an important role as a photoprotective mechanism in synergy with the other pigments present. In particular, we have demonstrated that blue structural coloration attenuates the more energetic light while simultaneously favouring green and red light harvesting through the external antennae (phycobilisomes) which possess an intensity-dependent photoprotection mechanism. These insights into the relationship between structural colour and photosynthetic light management further our understanding of the mechanisms involved.
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Affiliation(s)
- Ariel García Fleitas
- Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, 20134 Milano, Italy
- Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
| | - Samim Sardar
- Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, 20134 Milano, Italy
| | | | - Maria Murace
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Silvia Vignolini
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Juliet Brodie
- Natural History Museum, Science, Cromwell Road, London SW7 5BD, UK
| | - Guglielmo Lanzani
- Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, 20134 Milano, Italy
- Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
| | - Cosimo D'Andrea
- Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, 20134 Milano, Italy
- Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133 Milano, Italy
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6
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Nam SK, Amstad E, Kim SH. Hydrogel-Encased Photonic Microspheres with Enhanced Color Saturation and High Suspension Stability. ACS APPLIED MATERIALS & INTERFACES 2023; 15:58761-58769. [PMID: 38084724 DOI: 10.1021/acsami.3c14364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
Regular arrays of colloidal particles can produce striking structural colors without the need for any chemical pigments. Regular arrays of colloidal particles can be processed into microparticles via emulsion templates for use as structural colorants. Photonic microparticles, however, suffer from intense incoherent scattering and lack of suspension stability. We propose a microfluidic technique to generate hydrogel-shelled photonic microspheres that display enhanced color saturation and suspension stability. We created these microspheres using oil-in-water-in-oil (O/W/O) double-emulsion droplets with well-defined dimensions with a capillary microfluidic device. The inner oil droplet contains silica particles in a photocurable monomer, while the middle water droplet carries the hydrogel precursor. Within the inner oil droplet, silica particles arrange into crystalline arrays due to solvation-layer-induced interparticle repulsion. UV irradiation solidifies the inner photonic core and the outer hydrogel shell. The hydrogel shell reduces white scattering and enhances the suspension stability in water. Notably, the hydrogel precursor in the water droplet aids in maintaining the solvation layer, resulting in enhanced crystallinity and richer colors compared with microspheres from O/W single-emulsion droplets. These hydrogel-encased photonic microspheres show promise as structural colorants in water-based inks and polymer composites.
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Affiliation(s)
- Seong Kyeong Nam
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Esther Amstad
- Institute of Materials, École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland
| | - Shin-Hyun Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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7
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Thomas DHN, Kjernsmo K, Scott-Samuel NE, Whitney HM, Cuthill IC. Interactions between color and gloss in iridescent camouflage. Behav Ecol 2023; 34:751-758. [PMID: 37744171 PMCID: PMC10516679 DOI: 10.1093/beheco/arad050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 05/10/2023] [Accepted: 05/25/2023] [Indexed: 09/26/2023] Open
Abstract
Iridescence is a taxonomically widespread form of structural coloration that produces often intense hues that change with the angle of viewing. Its role as a signal has been investigated in multiple species, but recently, and counter-intuitively, it has been shown that it can function as camouflage. However, the property of iridescence that reduces detectability is, as yet, unclear. As viewing angle changes, iridescent objects change not only in hue but also in intensity, and many iridescent animals are also shiny or glossy; these "specular reflections," both from the target and background, have been implicated in crypsis. Here, we present a field experiment with natural avian predators that separate the relative contributions of color and gloss to the "survival" of iridescent and non-iridescent beetle-like targets. Consistent with previous research, we found that iridescent coloration, and high gloss of the leaves on which targets were placed, enhance survival. However, glossy targets survived less well than matt. We interpret the results in terms of signal-to-noise ratio: specular reflections from the background reduce detectability by increasing visual noise. While a specular reflection from the target attracts attention, a changeable color reduces the signal because, we suggest, normally, the color of an object is a stable feature for detection and identification.
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Affiliation(s)
- Dylan H N Thomas
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
| | - Karin Kjernsmo
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
| | - Nicholas E Scott-Samuel
- School of Psychological Science, University of Bristol, 12a Priory Road, Bristol BS8 1TU, UK
| | - Heather M Whitney
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
| | - Innes C Cuthill
- School of Biological Sciences, University of Bristol, 24 Tyndall Avenue, Bristol BS8 1TQ, UK
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8
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Sullivan CJ, Brown K, Hung CS, Tang JKH, DeSimone M, Chen V, Lloyd PF, Gupta M, Juhl A, Crookes-Goodson W, Vasudev M, Dennis PB, Kelley-Loughnane N. Iridescent biofilms of Cellulophaga lytica are tunable platforms for scalable, ordered materials. Sci Rep 2023; 13:13192. [PMID: 37580360 PMCID: PMC10425352 DOI: 10.1038/s41598-023-38797-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 07/14/2023] [Indexed: 08/16/2023] Open
Abstract
Nature offers many examples of materials which exhibit exceptional properties due to hierarchical assembly of their constituents. In well-studied multi-cellular systems, such as the morpho butterfly, a visible indication of having ordered submicron features is given by the display of structural color. Detailed investigations of nature's designs have yielded mechanistic insights and led to the development of biomimetic materials at laboratory scales. However, the manufacturing of hierarchical assemblies at industrial scales remains difficult. Biomanufacturing aims to leverage the autonomy of biological systems to produce materials at lower cost and with fewer carbon emissions. Earlier reports documented that some bacteria, particularly those with gliding motility, self-assemble into biofilms with polycrystalline structures and exhibit glittery, iridescent colors. The current study demonstrates the potential of using one of these bacteria, Cellulophaga lytica, as a platform for the large scale biomanufacturing of ordered materials. Specific approaches for controlling C. lytica biofilm optical, spatial and temporal properties are reported. Complementary microscopy-based studies reveal that biofilm color variations are attributed to changes in morphology induced by cellular responses to the local environment. Incorporation of C. lytica biofilms into materials is also demonstrated, thereby facilitating their handling and downstream processing, as would be needed during manufacturing processes. Finally, the utility of C. lytica as a self-printing, photonic ink is established by this study. In summary, autonomous surface assembly of C. lytica under ambient conditions and across multiple length scales circumvent challenges that currently hinder production of ordered materials in industrial settings.
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Affiliation(s)
- Claretta J Sullivan
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA.
| | - Kennedy Brown
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
| | - Chia-Suei Hung
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
| | - Joseph Kuo-Hsiang Tang
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
| | - Mark DeSimone
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
- Department of Bioengineering, University of Massachusetts Dartmouth, Dartmouth, MA, 02747, USA
| | - Vincent Chen
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
| | - Pamela F Lloyd
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
| | - Maneesh Gupta
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
| | - Abby Juhl
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
| | - Wendy Crookes-Goodson
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
| | - Milana Vasudev
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
- Department of Bioengineering, University of Massachusetts Dartmouth, Dartmouth, MA, 02747, USA
| | - Patrick B Dennis
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
| | - Nancy Kelley-Loughnane
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base, OH, 45433, USA
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9
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Moyaho A, Salazar-Bautista JL, Beristain-Castillo E, Amira FU. Iridescent scales signal male fighting ability to access females in the jewelled splitfin Xenotoca variata. JOURNAL OF FISH BIOLOGY 2023; 102:794-802. [PMID: 36648014 DOI: 10.1111/jfb.15316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Jewelled splitfin males (Xenotoca variata) possess multi-colour iridescent scales (speckles) on the flanks. This study tested the hypothesis that the number of speckles could be a good proxy for predicting fighting ability in contests for access to females. The experiments consisted in observing and recording males' agonistic behaviour, courtship displays and mating attempts in mixed-sex groups. The data were analysed and presented based on a Bayesian approach, which revealed that the density (cm-2 ) of speckles was positively correlated with the increase observed in the proportional frequency of attacks. Similarly, the density of speckles was positively associated with the increase observed in the frequency of courtship behaviour and with the frequency of mating attempts. Male-male aggressions drastically diminished (by eightfold) when females were removed from the observation tanks. These results indicate that the number of speckles is a consistent predictor of successful access to females and therefore, speckled males are likely to be able to gain more mating opportunities. This finding highlights the ubiquitous role iridescent colours play in visual signalling.
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Affiliation(s)
- Alejandro Moyaho
- Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, Puebla, Mexico
| | - José Luis Salazar-Bautista
- Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, Puebla, Mexico
| | | | - Flores-Urbina Amira
- Instituto de Fisiología, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, Puebla, Mexico
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10
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Szischik C, Inchaussandague M, Skigin D. Electromagnetic response of corrugated multilayer systems inspired by the Dione vanillae butterfly scales. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2023; 40:C68-C73. [PMID: 37132958 DOI: 10.1364/josaa.479677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Inspired by the microstructures in the wing scales of the butterfly Dione vanillae, we investigate the optical response of two multilayer structures, which include one or two corrugated interfaces. The reflectance is calculated using the C-method and is compared with that of a planar multilayer. We perform a detailed analysis of the influence of each geometric parameter and study the angular response, which is important for structures exhibiting iridescence. The results of this study aim to contribute to the design of multilayer structures with predetermined optical responses.
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11
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Fan X, Zheng X, An T, Li X, Leung N, Zhu B, Sui T, Shi N, Fan T, Zhao Q. Light diffraction by sarcomeres produces iridescence in transmission in the transparent ghost catfish. Proc Natl Acad Sci U S A 2023; 120:e2219300120. [PMID: 36913569 PMCID: PMC10041080 DOI: 10.1073/pnas.2219300120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 02/07/2023] [Indexed: 03/15/2023] Open
Abstract
Despite the elaborate varieties of iridescent colors in biological species, most of them are reflective. Here we show the rainbow-like structural colors found in the ghost catfish (Kryptopterus vitreolus), which exist only in transmission. The fish shows flickering iridescence throughout the transparent body. The iridescence originates from the collective diffraction of light after passing through the periodic band structures of the sarcomeres inside the tightly stacked myofibril sheets, and the muscle fibers thus work as transmission gratings. The length of the sarcomeres varies from ~1 μm from the body neutral plane near the skeleton to ~2 μm next to the skin, and the iridescence of a live fish mainly results from the longer sarcomeres. The length of the sarcomere changes by ~80 nm as it relaxes and contracts, and the fish shows a quickly blinking dynamic diffraction pattern as it swims. While similar diffraction colors are also observed in thin slices of muscles from non-transparent species such as the white crucian carps, a transparent skin is required indeed to have such iridescence in live species. The ghost catfish skin is of a plywood structure of collagen fibrils, which allows more than 90% of the incident light to pass directly into the muscles and the diffracted light to exit the body. Our findings could also potentially explain the iridescence in other transparent aquatic species, including the eel larvae (Leptocephalus) and the icefishes (Salangidae).
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Affiliation(s)
- Xiujun Fan
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai200240, China
| | - Xuezhi Zheng
- Department of Electrical Engineering, KU Leuven, LeuvenB3001, Belgium
| | - Tong An
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai200240, China
| | - Xiuhong Li
- Shanghai Synchrotron Radiation Facility, Shanghai201204, China
| | - Nathanael Leung
- School of Mechanical Engineering Sciences, University of Surrey, SurreyGU2 7XH, UK
| | - Bin Zhu
- School of Mechanical Engineering Sciences, University of Surrey, SurreyGU2 7XH, UK
| | - Tan Sui
- School of Mechanical Engineering Sciences, University of Surrey, SurreyGU2 7XH, UK
| | - Nan Shi
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai200240, China
| | - Tongxiang Fan
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai200240, China
| | - Qibin Zhao
- State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai200240, China
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12
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Chatterjee A, Pratakshya P, Kwansa AL, Kaimal N, Cannon AH, Sartori B, Marmiroli B, Orins H, Feng Z, Drake S, Couvrette J, Le L, Bernstorff S, Yingling YG, Gorodetsky AA. Squid Skin Cell-Inspired Refractive Index Mapping of Cells, Vesicles, and Nanostructures. ACS Biomater Sci Eng 2023; 9:978-990. [PMID: 36692450 DOI: 10.1021/acsbiomaterials.2c00088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The fascination with the optical properties of naturally occurring systems has been driven in part by nature's ability to produce a diverse palette of vibrant colors from a relatively small number of common structural motifs. Within this context, some cephalopod species have evolved skin cells called iridophores and leucophores whose constituent ultrastructures reflect light in different ways but are composed of the same high refractive index material─a protein called reflectin. Although such natural optical systems have attracted much research interest, measuring the refractive indices of biomaterial-based structures across multiple different environments and establishing theoretical frameworks for accurately describing the obtained refractive index values has proven challenging. Herein, we employ a synergistic combination of experimental and computational methodologies to systematically map the three-dimensional refractive index distributions of model self-assembled reflectin-based structures both in vivo and in vitro. When considered together, our findings may improve understanding of squid skin cell functionality, augment existing methods for characterizing protein-based optical materials, and expand the utility of emerging holotomographic microscopy techniques.
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Affiliation(s)
- Atrouli Chatterjee
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - Preeta Pratakshya
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
| | - Albert L Kwansa
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Nikhil Kaimal
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - Andrew H Cannon
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Barbara Sartori
- Institute of Inorganic Chemistry, Graz University of Technology, Graz 8010, Austria
| | - Benedetta Marmiroli
- Institute of Inorganic Chemistry, Graz University of Technology, Graz 8010, Austria
| | - Helen Orins
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - Zhijing Feng
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - Samantha Drake
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - Justin Couvrette
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - LeAnn Le
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, California 92697, United States
| | | | - Yaroslava G Yingling
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Alon A Gorodetsky
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, California 92697, United States.,Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States.,Department of Materials Science and Engineering, University of California, Irvine, Irvine, California 92697, United States
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13
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Sinha A, Simnani FZ, Singh D, Nandi A, Choudhury A, Patel P, Jha E, chouhan RS, Kaushik NK, Mishra YK, Panda PK, Suar M, Verma SK. The translational paradigm of nanobiomaterials: Biological chemistry to modern applications. Mater Today Bio 2022; 17:100463. [PMID: 36310541 PMCID: PMC9615318 DOI: 10.1016/j.mtbio.2022.100463] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 11/11/2022] Open
Abstract
Recently nanotechnology has evolved as one of the most revolutionary technologies in the world. It has now become a multi-trillion-dollar business that covers the production of physical, chemical, and biological systems at scales ranging from atomic and molecular levels to a wide range of industrial applications, such as electronics, medicine, and cosmetics. Nanobiomaterials synthesis are promising approaches produced from various biological elements be it plants, bacteria, peptides, nucleic acids, etc. Owing to the better biocompatibility and biological approach of synthesis, they have gained immense attention in the biomedical field. Moreover, due to their scaled-down sized property, nanobiomaterials exhibit remarkable features which make them the potential candidate for different domains of tissue engineering, materials science, pharmacology, biosensors, etc. Miscellaneous characterization techniques have been utilized for the characterization of nanobiomaterials. Currently, the commercial transition of nanotechnology from the research level to the industrial level in the form of nano-scaffolds, implants, and biosensors is stimulating the whole biomedical field starting from bio-mimetic nacres to 3D printing, multiple nanofibers like silk fibers functionalizing as drug delivery systems and in cancer therapy. The contribution of single quantum dot nanoparticles in biological tagging typically in the discipline of genomics and proteomics is noteworthy. This review focuses on the diverse emerging applications of Nanobiomaterials and their mechanistic advancements owing to their physiochemical properties leading to the growth of industries on different biomedical measures. Alongside the implementation of such nanobiomaterials in several drug and gene delivery approaches, optical coding, photodynamic cancer therapy, and vapor sensing have been elaborately discussed in this review. Different parameters based on current challenges and future perspectives are also discussed here.
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Affiliation(s)
- Adrija Sinha
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, Odisha, India
| | | | - Dibyangshee Singh
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, Odisha, India
| | - Aditya Nandi
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, Odisha, India
| | - Anmol Choudhury
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, Odisha, India
| | - Paritosh Patel
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, Odisha, India
- Plasma Bioscience Research Center, Department of Electrical and Biological Physics, Kwangwoon University, 01897, Seoul, South Korea
| | - Ealisha Jha
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, Odisha, India
| | - Raghuraj Singh chouhan
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Nagendra Kumar Kaushik
- Plasma Bioscience Research Center, Department of Electrical and Biological Physics, Kwangwoon University, 01897, Seoul, South Korea
| | - Yogendra Kumar Mishra
- Mads Clausen Institute, NanoSYD, University of Southern Denmark, Alsion 2, 6400, Sønderborg, Denmark
| | - Pritam Kumar Panda
- Condensed Matter Theory Group, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
| | - Mrutyunjay Suar
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, Odisha, India
| | - Suresh K. Verma
- KIIT School of Biotechnology, KIIT University, Bhubaneswar, 751024, Odisha, India
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14
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Historical and social forces in the Iridescent Life Course: key life events and experiences of transgender older adults. AGEING & SOCIETY 2022. [DOI: 10.1017/s0144686x22000563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
The lives of transgender older adults are rarely examined, and little is known about the critical life events and experiences of this population. Informed by the Iridescent Life Course, this study investigates how intersectionality, fluidity, context and power impact the life events and experiences of trans older adults by generation and gender. Utilising 2014 data from the National Health, Aging, and Sexuality/Gender Study: Aging with Pride (National Institutes of Health/National Institute on Aging funded), a national sample of LGBTQ+ individuals 50 years and older, living in the United States of America, were analysed to examine life events of 205 transgender older adults, including identity development, work, bias, kin relationships, social and community engagement, health and wellbeing. Ordinary least-squares regressions and logistics regressions are used to compare the life events between the generations then test the interaction effect of gender. Pride Generation more openly disclose their identities and are more likely to be employed and married compared to the Silenced Generation, who have more military service, higher rates of retirement, fewer same-sex marriages and more different-sex marriages. Invisible Generation, the oldest group, are more likely retired, have more children and are more likely engaged in the community compared to the Silenced Generation, who experienced more discrimination. Applying the Iridescent Life Course is instrumental in understanding older trans adults' lives through intersecting identities of both generation and gender. These insights have the potential to create a greater appreciation of how historical events shape differing generations of transgender people, creating an opportunity to link generations together.
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15
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Marques P, Zandonà E, Amaral J, Selhorst Y, El-Sabaawi R, Mazzoni R, Castro L, Pilastro A. Using fish to understand how cities affect sexual selection before and after mating. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.928277] [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
Urbanization transforms natural and agricultural areas into built landscapes. Such profound habitat alteration imposes strong pressure on phenotypic trait changes through processes related to natural and/or sexual selection. Evidence of how natural selection drives changes to traits in urban biota is increasing, but little is known about the role of sexual selection. In this study, we assessed the effect of urbanization on the expression and interaction of males' pre-mating traits (body size and color) and a post-mating trait (sperm load). We used a widespread invasive species, the guppy (Poecilia reticulata), which is a wellknown model for studying sexual selection, but have never been studied in urban systems for this purpose. We found that urbanization did not affect mean body size or condition, but it resulted in size-dependent reductions in the expression of orange and iridescent colors, as well as sperm load. The orange color was reduced in small urban guppies, while the iridescent colors were reduced in large urban guppies compared to non-urban guppies. The difference in sperm load was only found in large males, with lower sperm load in urban guppies. The relationship between orange color and sperm load was positive in urban guppies but negative in non-urban guppies, while the association between iridescent color and sperm load followed the opposite pattern. Our findings suggest that sexual selection on pre- and post-mating traits is weaker in urban than in non-urban systems and that interactions between such traits are context dependent. These responses can be related to the pollution and altered visual environment of urban systems and provide an opportunity to advance our understanding of the mechanisms determining adaptation in cities.
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16
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Ospina-Rozo L, Roberts A, Stuart-Fox D. A generalized approach to characterize optical properties of natural objects. Biol J Linn Soc Lond 2022. [DOI: 10.1093/biolinnean/blac064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
To understand the diversity of ways in which natural materials interact with light, it is important to consider how their reflectance changes with the angle of illumination or viewing and to consider wavelengths beyond the visible. Efforts to characterize these optical properties, however, have been hampered by heterogeneity in measurement techniques, parameters and terminology. Here, we propose a standardized set of measurements, parameters and terminology to describe the optical properties of natural objects based on spectrometry, including angle-dependent effects, such as iridescence and specularity. We select a set of existing measurements and parameters that are generalizable to any wavelength range and spectral shape, and we highlight which subsets of measures are relevant to different biological questions. As a case study, we have applied these measures to 30 species of Christmas beetles, in which we observed previously unrealized diversity in visible and near-infrared reflectance. As expected, reflection of short wavelengths was associated with high spectral purity and angle dependence. In contrast to simple, artificial structures, iridescence and specularity were not strongly correlated, highlighting the complexity and modularity of natural materials. Species did not cluster according to spectral parameters or genus, suggesting high lability of optical properties. The proposed standardization of measures and parameters will improve our understanding of biological adaptations for manipulating light by facilitating the systematic comparison of complex optical properties, such as glossy or metallic appearances and visible or near-infrared iridescence.
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Affiliation(s)
- Laura Ospina-Rozo
- School of Biosciences, University of Melbourne , VIC 3010 , Australia
| | - Ann Roberts
- ARC Centre of Excellence for Transformative Meta-Optical Systems, School of Physics, University of Melbourne , VIC 3010 , Australia
| | - Devi Stuart-Fox
- School of Biosciences, University of Melbourne , VIC 3010 , Australia
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17
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Davis A, Zipple MN, Diaz D, Peters S, Nowicki S, Johnsen S. Influence of visual background on discrimination of signal-relevant colours in zebra finches ( Taeniopygia guttata). Proc Biol Sci 2022; 289:20220756. [PMID: 35673868 PMCID: PMC9174715 DOI: 10.1098/rspb.2022.0756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Colour signals of many animals are surrounded by a high-contrast achromatic background, but little is known about the possible function of this arrangement. For both humans and non-human animals, the background colour surrounding a colour stimulus affects the perception of that stimulus, an effect that can influence detection and discrimination of colour signals. Specifically, high colour contrast between the background and two given colour stimuli makes discrimination more difficult. However, it remains unclear how achromatic background contrast affects signal discrimination in non-human animals. Here, we test whether achromatic contrast between signal-relevant colours and an achromatic background affects the ability of zebra finches to discriminate between those colours. Using an odd-one-out paradigm and generalized linear mixed models, we found that higher achromatic contrast with the background, whether positive or negative, decreases the ability of zebra finches to discriminate between target and non-target stimuli. This effect is particularly strong when colour distances are small (less than 4 ΔS) and Michelson achromatic contrast with the background is high (greater than 0.5). We suggest that researchers should consider focal colour patches and their backgrounds as collectively comprising a signal, rather than focusing on solely the focal colour patch itself.
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Affiliation(s)
- Alexander Davis
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Matthew N. Zipple
- Department of Biology, Duke University, Durham, NC 27708, USA,Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA
| | - Danae Diaz
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Susan Peters
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Stephen Nowicki
- Department of Biology, Duke University, Durham, NC 27708, USA
| | - Sönke Johnsen
- Department of Biology, Duke University, Durham, NC 27708, USA
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18
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Kjernsmo K, Lim AM, Middleton R, Hall JR, Costello LM, Whitney HM, Scott-Samuel NE, Cuthill IC. Beetle iridescence induces an avoidance response in naïve avian predators. Anim Behav 2022; 188:45-50. [PMID: 37649469 PMCID: PMC10462570 DOI: 10.1016/j.anbehav.2022.04.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/11/2021] [Accepted: 03/02/2022] [Indexed: 11/23/2022]
Abstract
It has recently been found that iridescence, a taxonomically widespread form of animal coloration defined by a change in hue with viewing angle, can act as a highly effective form of camouflage. However, little is known about whether iridescence can confer a survival benefit to prey postdetection and, if so, which optical properties of iridescent prey are important for this putative protective function. Here, we tested the effects of both iridescence and surface gloss (i.e. specular reflection) on the attack behaviour of prey-naïve avian predators. Using real and artificial jewel beetle, Sternocera aequisignata, wing cases, we found that iridescence provides initial protection against avian predation by significantly reducing the willingness to attack. Importantly, we found that the main factor explaining this aversion is iridescence, not multiple colours per se, with surface gloss also having an independent effect. Our results are important because they demonstrate that even when prey are presented up close and against a mismatching background, iridescence may confer a survival benefit by inducing hesitation or even, as sometimes observed, an aversion response in attacking birds. Furthermore, this means that even postdetection, prey do not necessarily need to have secondary defences such as sharp spines or toxins for iridescence to have a protective effect. Taken together, our results suggest that reduced avian predation could facilitate the initial evolution of iridescence in many species of insects and that it is the defining feature of iridescence, its colour changeability, that is important for this effect.
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Affiliation(s)
- Karin Kjernsmo
- School of Biological Sciences, University of Bristol, Bristol, U.K
| | - Anna M. Lim
- School of Biological Sciences, University of Bristol, Bristol, U.K
| | - Rox Middleton
- School of Biological Sciences, University of Bristol, Bristol, U.K
| | - Joanna R. Hall
- School of Psychological Science, University of Bristol, Bristol, U.K
| | - Leah M. Costello
- School of Biological Sciences, University of Bristol, Bristol, U.K
| | | | | | - Innes C. Cuthill
- School of Biological Sciences, University of Bristol, Bristol, U.K
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19
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Cezário RR, Gorb SN, Guillermo‐Ferreira R. Camouflage by counter‐brightness: the blue wings of Morpho dragonflies
Zenithoptera lanei
(Anisoptera: Libellulidae) match the water background. J Zool (1987) 2022. [DOI: 10.1111/jzo.12955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. R. Cezário
- Department of Biological Sciences Universidade Federal do Triângulo Mineiro Uberaba Brazil
- Graduate Program in Entomology University of São Paulo (USP) Ribeirão Preto Brazil
| | - S. N. Gorb
- Department of Functional Morphology and Biomechanics Zoological Institute Kiel University Kiel Germany
| | - R. Guillermo‐Ferreira
- Department of Biological Sciences Universidade Federal do Triângulo Mineiro Uberaba Brazil
- Graduate Program in Entomology University of São Paulo (USP) Ribeirão Preto Brazil
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20
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21
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Goldsen KF, Jen S, Clark T, Kim HJ, Jung H, Goldsen J. Historical and generational forces in the Iridescent Life Course of bisexual women, men, and gender diverse older adults. SEXUALITIES 2022; 25:132-156. [PMID: 35444486 PMCID: PMC9017398 DOI: 10.1177/1363460720947313] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Purpose Little is known about the life course of bisexual older adults. This study examines life events and experiences of bisexuals by generation: Pride Generation, born 1950-1964; Silenced Generation, born 1935-1949; and Invisible Generation, born 1934 or earlier, as well as by gender among women, men, and gender diverse older adults. Methods Aging with Pride: National Health, Aging, and Sexuality/Gender Study is the first national longitudinal study of LGBTQ older adults in the US. We utilize the Iridescent Life Course to examine the life events and life course experiences of bisexual older adults (N = 216) using 2014 survey data. The Iridescent Life Course frames this study for comparing generational and gender differences in five key areas: identity development; work; kin and social relationships; bias-related experiences; and physical and mental health. Findings The Invisible Generation, the oldest generation, compared to the two younger generations, reports significant risks related to social relationships, the lowest levels of openly disclosing, and fewer bias-related experiences. They also demonstrate important signs of resilience and better mental health. Bisexual men and gender diverse older adults report higher rates of bias-related experiences and fewer social resources than bisexual women. Conclusion Based on the Iridescent Life Course, we document important differences in the heterogeneity and intersectionality in bisexual lives, particularly for those in late life and those gender diverse. It is essential to document the distinct nature of bisexuals' life course, as it provides both historical and contemporary insights into aging and the reframing of future research.
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22
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23
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Brady PC, Cummings ME, Gruev V, Hernandez T, Blair S, Vail A, Garcia M. In situ measurements of reef squid polarization patterns using two-dimensional polarization data mapped onto three-dimensional tessellated surfaces. J R Soc Interface 2021; 18:20210703. [PMID: 34814730 PMCID: PMC8611331 DOI: 10.1098/rsif.2021.0703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/01/2021] [Indexed: 11/12/2022] Open
Abstract
Reef squids belong to a group reputed for polarization sensitivity, yet polarization patterns of reef squid have not been quantified in situ. To quantify polarization patterns from video polarimetric data, we developed a protocol to map two-dimensional polarization data onto squid-shaped three-dimensional tessellated surfaces. This protocol provided a robust data container used to investigate three-dimensional regions-of-interest, producing data lineouts derived from the squid's geometry. This protocol also extracted polarimeter and squid body orientations and the solar heading from polarization images. When averaged over the solar heading, the ventral midline gave a low degree of polarization (2.4 ± 5.3%), and the area between the ventral and flank midlines had higher values (9.0 ± 5.3%). These averaged data had a large discontinuity in the angle of polarization (AoP) at the mantle's ventral midline (64 ± 55°), with larger discontinuities measured on individual squid. Ray-tracing calculations demonstrated that the AoP pattern was not related to the squid's surface-normal geometry. However, the AoP followed virtual striation axes on the squid's surface oriented 24° to the squid's long axis, similar in angle (27°) to the striations of birefringent collagen fibres documented in other squid species' skin.
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Affiliation(s)
- P. C. Brady
- Integrative Biology, University of Texas at Austin School of Biological Sciences, Austin, TX 78712-0128, USA
| | - M. E. Cummings
- Integrative Biology, University of Texas at Austin School of Biological Sciences, Austin, TX 78712-0128, USA
| | - V. Gruev
- University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - T. Hernandez
- University of California San Diego, La Jolla, CA, USA
| | - S. Blair
- University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - A. Vail
- University of Cambridge, Cambridge, UK
| | - M. Garcia
- University of Illinois at Urbana-Champaign, Urbana, IL, USA
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24
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Bioluminescence and Photoreception in Unicellular Organisms: Light-Signalling in a Bio-Communication Perspective. Int J Mol Sci 2021; 22:ijms222111311. [PMID: 34768741 PMCID: PMC8582858 DOI: 10.3390/ijms222111311] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 10/12/2021] [Accepted: 10/13/2021] [Indexed: 12/13/2022] Open
Abstract
Bioluminescence, the emission of light catalysed by luciferases, has evolved in many taxa from bacteria to vertebrates and is predominant in the marine environment. It is now well established that in animals possessing a nervous system capable of integrating light stimuli, bioluminescence triggers various behavioural responses and plays a role in intra- or interspecific visual communication. The function of light emission in unicellular organisms is less clear and it is currently thought that it has evolved in an ecological framework, to be perceived by visual animals. For example, while it is thought that bioluminescence allows bacteria to be ingested by zooplankton or fish, providing them with favourable conditions for growth and dispersal, the luminous flashes emitted by dinoflagellates may have evolved as an anti-predation system against copepods. In this short review, we re-examine this paradigm in light of recent findings in microorganism photoreception, signal integration and complex behaviours. Numerous studies show that on the one hand, bacteria and protists, whether autotrophs or heterotrophs, possess a variety of photoreceptors capable of perceiving and integrating light stimuli of different wavelengths. Single-cell light-perception produces responses ranging from phototaxis to more complex behaviours. On the other hand, there is growing evidence that unicellular prokaryotes and eukaryotes can perform complex tasks ranging from habituation and decision-making to associative learning, despite lacking a nervous system. Here, we focus our analysis on two taxa, bacteria and dinoflagellates, whose bioluminescence is well studied. We propose the hypothesis that similar to visual animals, the interplay between light-emission and reception could play multiple roles in intra- and interspecific communication and participate in complex behaviour in the unicellular world.
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25
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Vidal MS, Dolinko AE, Skigin DC. Rayleigh method adapted for the study of the optical response of natural photonic structures. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2021; 44:118. [PMID: 34554337 DOI: 10.1140/epje/s10189-021-00124-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 09/07/2021] [Indexed: 06/13/2023]
Abstract
To study the electromagnetic response of natural structures that exhibit interesting optical properties, we developed a computational tool to solve the problem of electromagnetic scattering by a rough interface between two isotropic media, based on the Rayleigh method. The key aspect of the developed formalism is its capability of introducing the interface profile within the code by means of a digitalized image of the structure, which can be either obtained from an electron microscopy image or simply by design according to the complexity of the scattering surface. As application examples, we show the results obtained for surfaces taken directly from microscopy images of two different biological species. This approach constitutes a fundamental step in order to model the electromagnetic response of natural photonic structures.
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Affiliation(s)
- Maria Sol Vidal
- Grupo de Electromagnetismo Aplicado, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón I, C1428EHA, Buenos Aires, Argentina.
| | - Andrés E Dolinko
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
- Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón 2, C1428EHA, Buenos Aires, Argentina
| | - Diana C Skigin
- Grupo de Electromagnetismo Aplicado, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellón I, C1428EHA, Buenos Aires, Argentina
- Instituto de Física de Buenos Aires, CONICET-Universidad de Buenos Aires, Buenos Aires, Argentina
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26
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Giraldo M, Sosa J, Stavenga D. Feather iridescence of Coeligena hummingbird species varies due to differently organized barbs and barbules. Biol Lett 2021; 17:20210190. [PMID: 34428957 PMCID: PMC8385349 DOI: 10.1098/rsbl.2021.0190] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Hummingbirds are perhaps the most exquisite bird species because of their prominent iridescence, created by stacks of melanosomes in the feather barbules. The feather colours crucially depend on the nanoscopic dimensions of the melanosome, and the displayed iridescence can distinctly vary, dependent on the spatial organization of the barbs and barbules. We have taken the genus Coeligena as a model group, with species having feathers that strongly vary in their spatial reflection properties. We studied the feather morphology and the optical characteristics. We found that the coloration of Coeligena hummingbirds depends on both the Venetian-blind-like arrangement of the barbules and the V-shaped, angular arrangement of the barbules at opposite sides of the barbs. Both the nanoscopic and microscopic organization of the hummingbird feather components determine the bird's macroscopic appearance.
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Affiliation(s)
- Marco Giraldo
- Biophysics Group, Institute of Physics, University of Antioquia, Colombia.,Surfaces and Thin Films, Zernike Institute for Advanced Materials, University of Groningen, The Netherlands
| | - Juliana Sosa
- Biophysics Group, Institute of Physics, University of Antioquia, Colombia
| | - Doekele Stavenga
- Surfaces and Thin Films, Zernike Institute for Advanced Materials, University of Groningen, The Netherlands
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27
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Rubenstein DR, Corvelo A, MacManes MD, Maia R, Narzisi G, Rousaki A, Vandenabeele P, Shawkey MD, Solomon J. Feather Gene Expression Elucidates the Developmental Basis of Plumage Iridescence in African Starlings. J Hered 2021; 112:417-429. [PMID: 33885791 DOI: 10.1093/jhered/esab014] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 03/19/2021] [Indexed: 01/08/2023] Open
Abstract
Iridescence is widespread in the living world, occurring in organisms as diverse as bacteria, plants, and animals. Yet, compared to pigment-based forms of coloration, we know surprisingly little about the developmental and molecular bases of the structural colors that give rise to iridescence. Birds display a rich diversity of iridescent structural colors that are produced in feathers by the arrangement of melanin-containing organelles called melanosomes into nanoscale configurations, but how these often unusually shaped melanosomes form, or how they are arranged into highly organized nanostructures, remains largely unknown. Here, we use functional genomics to explore the developmental basis of iridescent plumage using superb starlings (Lamprotornis superbus), which produce both iridescent blue and non-iridescent red feathers. Through morphological and chemical analyses, we confirm that hollow, flattened melanosomes in iridescent feathers are eumelanin-based, whereas melanosomes in non-iridescent feathers are solid and amorphous, suggesting that high pheomelanin content underlies red coloration. Intriguingly, the nanoscale arrangement of melanosomes within the barbules was surprisingly similar between feather types. After creating a new genome assembly, we use transcriptomics to show that non-iridescent feather development is associated with genes related to pigmentation, metabolism, and mitochondrial function, suggesting non-iridescent feathers are more energetically expensive to produce than iridescent feathers. However, iridescent feather development is associated with genes related to structural and cellular organization, suggesting that, while nanostructures themselves may passively assemble, barbules and melanosomes may require active organization to give them their shape. Together, our analyses suggest that iridescent feathers form through a combination of passive self-assembly and active processes.
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Affiliation(s)
- Dustin R Rubenstein
- Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, NY
- Center for Integrative Animal Behavior, Columbia University, New York, NY
| | | | - Matthew D MacManes
- Department of Molecular, Cellular and Biomedical Sciences, University of New Hampshire, Durham, NH
| | - Rafael Maia
- Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, NY
| | | | - Anastasia Rousaki
- Raman Spectroscopy Research Group, Department of Chemistry, Ghent University, Krigslaan, Ghent, Belgium
| | - Peter Vandenabeele
- Raman Spectroscopy Research Group, Department of Chemistry, Ghent University, Krigslaan, Ghent, Belgium
- Archaeometry Research Group, Department of Archaeology, Ghent University, Sint-Pietersnieuwstraat, Ghent, Belgium
| | - Matthew D Shawkey
- Evolution and Optics of Nanostructures Group, Department of Biology, Ghent University, Ghent, Belgium
| | - Joseph Solomon
- Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, NY
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28
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Tan EJ, Elgar MA. Motion: enhancing signals and concealing cues. Biol Open 2021; 10:271863. [PMID: 34414408 PMCID: PMC8411570 DOI: 10.1242/bio.058762] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/02/2021] [Indexed: 01/15/2023] Open
Abstract
Animal colour patterns remain a lively focus of evolutionary and behavioural ecology, despite the considerable conceptual and technical developments over the last four decades. Nevertheless, our current understanding of the function and efficacy of animal colour patterns remains largely shaped by a focus on stationary animals, typically in a static background. Yet, this rarely reflects the natural world: most animals are mobile in their search for food and mates, and their surrounding environment is usually dynamic. Thus, visual signalling involves not only animal colour patterns, but also the patterns of animal motion and behaviour, often in the context of a potentially dynamic background. While motion can reveal information about the signaller by attracting attention or revealing signaller attributes, motion can also be a means of concealing cues, by reducing the likelihood of detection (motion camouflage, motion masquerade and flicker-fusion effect) or the likelihood of capture following detection (motion dazzle and confusion effect). The interaction between the colour patterns of the animal and its local environment is further affected by the behaviour of the individual. Our review details how motion is intricately linked to signalling and suggests some avenues for future research. This Review has an associated Future Leader to Watch interview with the first author. Summary: While motion can reveal information about the signaller, motion can also be a means of concealing cues by reducing the likelihood of detection or the likelihood of capture following detection.
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Affiliation(s)
- Eunice J Tan
- Division of Science, Yale-NUS College, Singapore 138527, Singapore
| | - Mark A Elgar
- School of BioSciences, University of Melbourne, Melbourne, Victoria 3010, Australia
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29
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Burdfield-Steel E, Kemp DJ. Negative intersexual genetic correlation for colour pattern in a variable aposematic insect. Biol J Linn Soc Lond 2021. [DOI: 10.1093/biolinnean/blab025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Despite the fact their coloration functions as an aposematic signal, and is thus expected to be under stabilizing selection, hibiscus harlequin bugs (Tectocoris diophthalmus) show an impressive level of variation in their iridescent coloration both within and between populations. To date the heritability of coloration in this species remains unknown. Here we focus on a single population in New South Wales (the southern part of this species’ Australian range), with the greatest colour variation. We reared full-sib families of known pedigree in the laboratory and analysed the extent of iridescent coloration at adulthood. We then looked for evidence of heritability, condition dependence and antagonistic sexual selection acting on colour in this species. We found significant heritability in the extent of iridescent coloration for both sexes, as well as in development time and body size, but no evidence that condition dependence played a role in the determination of adult coloration. There was, however, a sex by genotype interaction for iridescent cover, in the form of a negative intersexual genetic correlation: in families where sons had high iridescent cover the daughters had low, and vice versa. Our results suggest that different selective pressures may act on coloration in males and females of this species.
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Affiliation(s)
- Emily Burdfield-Steel
- Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
- Department of Biological Sciences, Faculty of Science and Engineering, Macquarie University, North Ryde, NSW, Australia
| | - Darrell J Kemp
- Department of Biological Sciences, Faculty of Science and Engineering, Macquarie University, North Ryde, NSW, Australia
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30
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Cezário RR, Lopez VM, Gorb S, Guillermo-Ferreira R. Dynamic iridescent signals of male copperwing damselflies coupled with wing-clapping displays: the perspective of different receivers. Biol J Linn Soc Lond 2021. [DOI: 10.1093/biolinnean/blab068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Dynamic signals are a widespread phenomenon in several taxa, usually associated with intraspecific communication. In contrast, dynamic iridescent signals are detectable only at specific angles of illumination; hence, the animal can hide the signal to avoid detection when necessary. This structural coloration is mostly dependent on the illumination, the contrast against the background and the vision of the receiver. Complex behavioural displays can be coupled with structural coloration to create dynamic visual signals that enhance these functions. Here, we address whether iridescence of the males of a damselfly that inhabits dark rainforests, Chalcopteryx scintillans, can be considered a dynamic visual signal. We analyse whether coloration is perceived by conspecifics, while reducing detectability to eavesdroppers against three types of backgrounds. Our results suggest that the visual background affects the detectability of male hindwings by different receivers, mostly predators and prey. We discuss whether these results and the angle dependence of colour could indicate a mechanism to avoid unwanted intraspecific interactions or even to lure both predators and prey. We conclude that the main functions of the dynamic iridescent signal are to communicate with conspecifics while hindering the signal for prey, adding evidence of the multifunctionality of structural coloration coupled with behavioural displays in animals.
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Affiliation(s)
- Rodrigo Roucourt Cezário
- Laboratory of Ecological Studies on Ethology and Evolution (LESTES Lab), Federal University of São Carlos, São Carlos, SP, Brazil
- Graduate program in Entomology, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Vinicius Marques Lopez
- Laboratory of Ecological Studies on Ethology and Evolution (LESTES Lab), Federal University of São Carlos, São Carlos, SP, Brazil
- Graduate program in Entomology, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Stanislav Gorb
- Department of Functional Morphology and Biomechanics, Zoological Institute, Kiel University, Am Botanischen Garten 1–9, D-24098 Kiel, Germany
| | - Rhainer Guillermo-Ferreira
- Laboratory of Ecological Studies on Ethology and Evolution (LESTES Lab), Federal University of São Carlos, São Carlos, SP, Brazil
- Graduate program in Entomology, University of São Paulo, Ribeirão Preto, SP, Brazil
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31
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Osotsi MI, Zhang W, Zada I, Gu J, Liu Q, Zhang D. Butterfly wing architectures inspire sensor and energy applications. Natl Sci Rev 2021; 8:nwaa107. [PMID: 34691587 PMCID: PMC8288439 DOI: 10.1093/nsr/nwaa107] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 04/27/2020] [Accepted: 05/08/2020] [Indexed: 12/11/2022] Open
Abstract
Natural biological systems are constantly developing efficient mechanisms to counter adverse effects of increasing human population and depleting energy resources. Their intelligent mechanisms are characterized by the ability to detect changes in the environment, store and evaluate information, and respond to external stimuli. Bio-inspired replication into man-made functional materials guarantees enhancement of characteristics and performance. Specifically, butterfly architectures have inspired the fabrication of sensor and energy materials by replicating their unique micro/nanostructures, light-trapping mechanisms and selective responses to external stimuli. These bio-inspired sensor and energy materials have shown improved performance in harnessing renewable energy, environmental remediation and health monitoring. Therefore, this review highlights recent progress reported on the classification of butterfly wing scale architectures and explores several bio-inspired sensor and energy applications.
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32
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Does Structural Color Exist in True Fungi? J Fungi (Basel) 2021; 7:jof7020141. [PMID: 33669274 PMCID: PMC7920071 DOI: 10.3390/jof7020141] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/12/2021] [Accepted: 02/12/2021] [Indexed: 12/25/2022] Open
Abstract
Structural color occurs by the interaction of light with regular structures and so generates colors by completely different optical mechanisms to dyes and pigments. Structural color is found throughout the tree of life but has not, to date, been reported in the fungi. Here we give an overview of structural color across the tree of life and provide a brief guide aimed at stimulating the search for this phenomenon in fungi.
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33
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Tick parasitism impairs contest behavior in the western fence lizard (Sceloporus occidentalis). Behav Ecol Sociobiol 2021. [DOI: 10.1007/s00265-021-02980-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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Stuart-Fox D, Ospina-Rozo L, Ng L, Franklin AM. The Paradox of Iridescent Signals. Trends Ecol Evol 2020; 36:187-195. [PMID: 33168152 DOI: 10.1016/j.tree.2020.10.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 10/05/2020] [Accepted: 10/09/2020] [Indexed: 12/11/2022]
Abstract
Signals reliably convey information to a receiver. To be reliable, differences between individuals in signal properties must be consistent and easily perceived and evaluated by receivers. Iridescent objects are often striking and vivid, but their appearance can change dramatically with viewing geometry and illumination. The changeable nature of iridescent surfaces creates a paradox: how can they be reliable signals? We contend that iridescent color patches can be reliable signals only if accompanied by specific adaptations to enhance reliability, such as structures and behaviors that limit perceived hue shift or enhance and control directionality. We highlight the challenges of studying iridescence and key considerations for the evaluation of its adaptive significance.
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Affiliation(s)
- Devi Stuart-Fox
- School of BioSciences, The University of Melbourne, Melbourne, VIC 3010, Australia.
| | - Laura Ospina-Rozo
- School of BioSciences, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Leslie Ng
- School of BioSciences, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Amanda M Franklin
- School of BioSciences, The University of Melbourne, Melbourne, VIC 3010, Australia
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35
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The cell organization underlying structural colour is involved in Flavobacterium IR1 predation. ISME JOURNAL 2020; 14:2890-2900. [PMID: 32873891 PMCID: PMC7784876 DOI: 10.1038/s41396-020-00760-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 08/14/2020] [Accepted: 08/24/2020] [Indexed: 12/03/2022]
Abstract
Flavobacterium IR1 is a gliding bacterium with a high degree of colonial organization as a 2D photonic crystal, resulting in vivid structural coloration when illuminated. Enterobacter cloacae B12, an unrelated bacterium, was isolated from the brown macroalga Fucus vesiculosus from the same location as IR1. IR1 was found to be a predator of B12. A process of surrounding, infiltration, undercutting and killing of B12 supported improved growth of IR1. A combination of motility and capillarity facilitated the engulfment of B12 colonies by IR1. Predation was independent of illumination. Mutants of IR1 that formed photonic crystals less effectively than the wild type were reduced in predation. Conversely, formation of a photonic crystal was not advantageous in resisting predation by Rhodococcus spp. PIR4. These observations suggest that the organization required to create structural colour has a biological function (facilitating predation) but one that is not directly related to the photonic properties of the colony. This work is the first experimental evidence supporting a role for this widespread type of cell organization in the Flavobacteriia.
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36
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Bermúdez-Ureña E, Kilchoer C, Lord NP, Steiner U, Wilts BD. Structural Diversity with Varying Disorder Enables the Multicolored Display in the Longhorn Beetle Sulawesiella rafaelae. iScience 2020; 23:101339. [PMID: 32688285 PMCID: PMC7371903 DOI: 10.1016/j.isci.2020.101339] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 06/24/2020] [Accepted: 06/30/2020] [Indexed: 12/16/2022] Open
Abstract
Light control through layered photonic nanostructures enables the strikingly colored displays of many beetles, birds, and butterflies. To achieve different reflected colors, natural organisms mainly rely on refractive index variations or scaling of a fixed structure design, as opposed to varying the type of structure. Here, we describe the presence of distinct coloration mechanisms in the longhorn beetle Sulawesiella rafaelae, which exhibits turquoise, yellow-green, and orange colors, each with a variable iridescence. By optical and electron microscopy, we show that the colors originate from multilayered architectures in hair-like scales with varying amounts of structural disorder. Structural characterizations and optical modeling show that the disorder strongly influences the optical properties of the scales, allowing an independent adjustment of the optical response. Our results shed light on the interplay of disorder in multilayered photonic structures and their biological significance, and could potentially inspire new ecological research and the development of novel optical components.
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Affiliation(s)
- Esteban Bermúdez-Ureña
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland.
| | - Cédric Kilchoer
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Nathan P Lord
- Department of Entomology, Louisiana State University Agricultural Center, 404 Life Sciences Building, LSU, Baton Rouge, LA 70803, USA
| | - Ullrich Steiner
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Bodo D Wilts
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland.
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37
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Cai C, Tihelka E, Pan Y, Yin Z, Jiang R, Xia F, Huang D. Structural colours in diverse Mesozoic insects. Proc Biol Sci 2020; 287:20200301. [PMID: 32605519 DOI: 10.1098/rspb.2020.0301] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Structural colours, nature's most pure and intense colours, originate when light is scattered via nanoscale modulations of the refractive index. Original colours in fossils illuminate the ecological interactions among extinct organisms and functional evolution of colours. Here, we report multiple examples of vivid metallic colours in diverse insects from mid-Cretaceous amber. Scanning and transmission electron microscopy revealed a smooth outer surface and five alternating electron-dense and electron-lucent layers in the epicuticle of a fossil wasp, suggesting that multilayer reflectors, the most common biophotonic nanostructure in animals and even plants, are responsible for the exceptional preservation of colour in amber fossils. Based on theoretical modelling of the reflectance spectra, a reflective peak of wavelength of 514 nm was calculated, corresponding to the bluish-green colour observed under white light. The green to blue structural colours in fossil wasps, beetles and a fly most likely functioned as camouflage, although other functions such as thermoregulation cannot be ruled out. This discovery not only provides critical evidence of evolution of structural colours in arthropods, but also sheds light on the preservation potential of nanostructures of ancient animals through geological time.
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Affiliation(s)
- Chenyang Cai
- State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China
| | - Erik Tihelka
- Department of Animal Science, Hartpury College, Hartpury GL19 3BE, UK
| | - Yanhong Pan
- State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China.,School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, People's Republic of China
| | - Ziwei Yin
- Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, Shanghai 200234, People's Republic of China
| | - Rixin Jiang
- Laboratory of Systematic Entomology, College of Life Sciences, Shanghai Normal University, Shanghai 200234, People's Republic of China
| | - Fangyuan Xia
- Lingpoge Amber Museum, Shanghai 201108, People's Republic of China
| | - Diying Huang
- State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China
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38
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Ruedt C, Gibis M, Barbut S, Weiss J. Colour change with longitudinal compression supports hypothesis of multilayer interference as cause for meat iridescence. Int J Food Sci Technol 2020. [DOI: 10.1111/ijfs.14626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chiara Ruedt
- Department of Food Physics and Meat Science Institute of Food Science and Biotechnology University of Hohenheim Garbenstraße 21/25 Stuttgart 70599 Germany
| | - Monika Gibis
- Department of Food Physics and Meat Science Institute of Food Science and Biotechnology University of Hohenheim Garbenstraße 21/25 Stuttgart 70599 Germany
| | - Shai Barbut
- Department of Food Science University of Guelph Guelph ONN1G 2W1Canada
| | - Jochen Weiss
- Department of Food Physics and Meat Science Institute of Food Science and Biotechnology University of Hohenheim Garbenstraße 21/25 Stuttgart 70599 Germany
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39
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Piszter G, Kertész K, Bálint Z, Biró LP. Stability and Selective Vapor Sensing of Structurally Colored Lepidopteran Wings Under Humid Conditions. SENSORS (BASEL, SWITZERLAND) 2020; 20:E3258. [PMID: 32521640 PMCID: PMC7308987 DOI: 10.3390/s20113258] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 06/04/2020] [Accepted: 06/05/2020] [Indexed: 11/16/2022]
Abstract
Biological photonic nanoarchitectures are capable of rapidly and chemically selectively sensing volatile organic compounds due to changing color when exposed to such vapors. Here, stability and the vapor sensing properties of butterfly and moth wings were investigated by optical spectroscopy in the presence of water vapor. It was shown that repeated 30 s vapor exposures over 50 min did not change the resulting optical response signal in a time-dependent manner, and after 5-min exposures the sensor preserved its initial properties. Time-dependent response signals were shown to be species-specific, and by using five test substances they were also shown to be substance-specific. The latter was also evaluated using principal component analysis, which showed that the time-dependent optical responses can be used for real-time analysis of the vapors. It was demonstrated that the capability to detect volatile organic compounds was preserved in the presence of water vapor: high-intensity color change signals with short response times were measured in 25% relative humidity, similar to the one-component case; therefore, our results can contribute to the development of biological photonic nanoarchitecture-based vapor detectors for real-world applications, like living and working environments.
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Affiliation(s)
- Gábor Piszter
- Institute of Technical Physics and Materials Science, Centre for Energy Research, P.O. Box 49, H-1525 Budapest, Hungary; (K.K.); (L.P.B.)
| | - Krisztián Kertész
- Institute of Technical Physics and Materials Science, Centre for Energy Research, P.O. Box 49, H-1525 Budapest, Hungary; (K.K.); (L.P.B.)
| | - Zsolt Bálint
- Hungarian Natural History Museum, 13 Baross St., H-1088 Budapest, Hungary;
| | - László Péter Biró
- Institute of Technical Physics and Materials Science, Centre for Energy Research, P.O. Box 49, H-1525 Budapest, Hungary; (K.K.); (L.P.B.)
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40
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Urquia GM, Inchaussandague ME, Skigin DC, Lester M, Barreira A, Tubaro P. Theoretical approaches to study the optical response of the red-legged honeycreeper's plumage (Cyanerpes cyaneus). APPLIED OPTICS 2020; 59:3901-3909. [PMID: 32400659 DOI: 10.1364/ao.380307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 03/27/2020] [Indexed: 06/11/2023]
Abstract
In this paper, we investigate the unusual color effect exhibited by the plumage of the heads of Cyanerpes cyaneus males, whose color turns from green to turquoise as the angle between the illumination and observation directions is increased. This singular color effect is characteristic of species that have quasi-ordered nanostructures of short-range order within the feather barbs. However, among species of the same family and even within feather patches of the same individual, one can find barbs with different characteristics, both macroscopic (curvature, shape, cross-sectional area) and in their internal microstructure. We apply the Korringa-Kohn-Rostoker method with the averaging technique to model the reflectance spectra for different angles of incidence and explain the dependence of the observed color with the incidence-collection angle. To investigate the influence of the disorder in the optical response of the spongy matrix, we apply the integral method for a two-dimensional cylinder system that simulates the distribution of air cavities within the $ \beta $β-keratin medium. The experimental reflectance was interpreted as the result of multiple reflections in the internal interfaces generated by large air voids present within the spongy matrix. The application of rigorous methods to the study of natural photonic structures is of fundamental relevance for the design of efficient bioinspired artificial materials.
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41
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McDonald LT, Narayanan S, Sandy A, Saranathan V, McNamara ME. Brilliant angle-independent structural colours preserved in weevil scales from the Swiss Pleistocene. Biol Lett 2020; 16:20200063. [PMID: 32289243 PMCID: PMC7211455 DOI: 10.1098/rsbl.2020.0063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Extant weevils exhibit a remarkable colour palette that ranges from muted monochromatic tones to rainbow-like iridescence, with the most vibrant colours produced by three-dimensional photonic nanostructures housed within cuticular scales. Although the optical properties of these nanostructures are well understood, their evolutionary history is not fully resolved, in part due to a poor knowledge of their fossil record. Here, we report three-dimensional photonic nanostructures preserved in brightly coloured scales of two weevils, belonging to the genus Phyllobius or Polydrusus, from the Pleistocene (16–10 ka) of Switzerland. The scales display vibrant blue, green and yellow hues that resemble those of extant Phyllobius/Polydrusus. Scanning electron microscopy and small-angle X-ray scattering analyses reveal that the subfossil scales possess a single-diamond photonic crystal nanostructure. In extant Phyllobius/Polydrusus, the near-angle-independent blue and green hues function primarily in crypsis. The preservation of far-field, angle-independent structural colours in the Swiss subfossil weevils and their likely function in substrate matching confirm the importance of investigating fossil and subfossil photonic nanostructures to understand the evolutionary origins and diversification of colours and associated behaviours (e.g. crypsis) in insects.
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Affiliation(s)
- Luke T McDonald
- School of Biological, Earth and Environmental Sciences, University College Cork, Cork T23 TK30, Ireland.,Environmental Research Institute, University College Cork, Cork T23 XE10, Ireland
| | - Suresh Narayanan
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Alec Sandy
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Vinodkumar Saranathan
- Division of Science, Yale-NUS College, 138609, Singapore.,Department of Biological Sciences, National University of Singapore 117543, Singapore.,NUS Nanoscience and Nanotechnology Initiative (NUSNNI-NanoCore), National University of Singapore, 117581, Singapore.,Lee Kong Chian Natural History Museum, National University of Singapore, 117377, Singapore
| | - Maria E McNamara
- School of Biological, Earth and Environmental Sciences, University College Cork, Cork T23 TK30, Ireland.,Environmental Research Institute, University College Cork, Cork T23 XE10, Ireland
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42
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Barrera-Patiño CP, Vollet-Filho JD, Teixeira-Rosa RG, Quiroz HP, Dussan A, Inada NM, Bagnato VS, Rey-González RR. Photonic effects in natural nanostructures on Morpho cypris and Greta oto butterfly wings. Sci Rep 2020; 10:5786. [PMID: 32238903 PMCID: PMC7113256 DOI: 10.1038/s41598-020-62770-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 03/13/2020] [Indexed: 11/09/2022] Open
Abstract
Photonic crystals are some of the more spectacular realizations that periodic arrays can change the behavior of electromagnetic waves. In nature, so-called structural colors appear in insects and even plants. Some species create beautiful color patterns as part of biological behavior such as reproduction or defense mechanisms as a form of biomimetics. The interaction between light and matter occurs at the surface, producing diffraction, interference and reflectance, and light transmission is possible under suitable conditions. In particular, there are two Colombian butterflies, Morpho cypris and Greta oto, that exhibit iridescence phenomena on their wings, and in this work, we relate these phenomena to the photonic effect. The experimental and theoretical approaches of the optical response visible region were studied to understand the underlying mechanism behind the light-matter interaction on the wings of these Colombian butterflies. Our results can guide the design of novel devices that use iridescence as angular filters or even for cosmetic purposes.
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Affiliation(s)
- C P Barrera-Patiño
- Universidad Nacional de Colombia Sede Bogotá, Departamento de Física, Grupo de Óptica e Información Cuántica, Ciudad Universitaria, Ed. 405 Of. 207, Bogotá, D.C., C.P. 111321, Colombia. .,Sao Carlos Institute of Physics - University of Sao Paulo, Avenida Trabalhador São-carlense, nº 400, Parque Arnold Schimidt - CEP 13566-590, São Carlos - São Paulo - Brazil., São Carlos, SP, Brazil.
| | - J D Vollet-Filho
- Sao Carlos Institute of Physics - University of Sao Paulo, Avenida Trabalhador São-carlense, nº 400, Parque Arnold Schimidt - CEP 13566-590, São Carlos - São Paulo - Brazil., São Carlos, SP, Brazil
| | - R G Teixeira-Rosa
- Sao Carlos Institute of Physics - University of Sao Paulo, Avenida Trabalhador São-carlense, nº 400, Parque Arnold Schimidt - CEP 13566-590, São Carlos - São Paulo - Brazil., São Carlos, SP, Brazil
| | - H P Quiroz
- Universidad Nacional de Colombia, Sede Bogotá, Departamento de Física, Grupo de Materiales Nanoestructurados y sus Aplicaciones, Ciudad Universitaria Ed. 404 Lab. 121C, Bogotá, D.C., C.P. 111321, Colombia
| | - A Dussan
- Universidad Nacional de Colombia, Sede Bogotá, Departamento de Física, Grupo de Materiales Nanoestructurados y sus Aplicaciones, Ciudad Universitaria Ed. 404 Lab. 121C, Bogotá, D.C., C.P. 111321, Colombia
| | - N M Inada
- Sao Carlos Institute of Physics - University of Sao Paulo, Avenida Trabalhador São-carlense, nº 400, Parque Arnold Schimidt - CEP 13566-590, São Carlos - São Paulo - Brazil., São Carlos, SP, Brazil
| | - V S Bagnato
- Sao Carlos Institute of Physics - University of Sao Paulo, Avenida Trabalhador São-carlense, nº 400, Parque Arnold Schimidt - CEP 13566-590, São Carlos - São Paulo - Brazil., São Carlos, SP, Brazil.,Hagler Institute for Advanced Study, Texas A&M University, 400 Bizzell St, College Station, TX, 77843, United States of America
| | - R R Rey-González
- Universidad Nacional de Colombia Sede Bogotá, Departamento de Física, Grupo de Óptica e Información Cuántica, Ciudad Universitaria, Ed. 405 Of. 207, Bogotá, D.C., C.P. 111321, Colombia
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43
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Kjernsmo K, Whitney HM, Scott-Samuel NE, Hall JR, Knowles H, Talas L, Cuthill IC. Iridescence as Camouflage. Curr Biol 2020; 30:551-555.e3. [PMID: 31978333 PMCID: PMC6997887 DOI: 10.1016/j.cub.2019.12.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/08/2019] [Accepted: 12/05/2019] [Indexed: 11/29/2022]
Abstract
Iridescence is a striking and taxonomically widespread form of animal coloration [1], but that its intense and varying hues could function as concealment [2] rather than signaling seems completely counterintuitive. Here, we show that the color changeability of biological iridescence, produced by multilayer cuticle reflectors in jewel beetle (Sternocera aequisignata) wing cases, provides effective protection against predation by birds. Importantly, we also show that the most likely mechanism to explain this increase in survival is camouflage and not some other protective function, such as aposematism. In two field experiments using wild birds and humans, we measured both the “survival” and direct detectability of iridescent and non-iridescent beetle models and demonstrated that the iridescent treatment fared best in both experiments. We also show that an increased level of specular reflection (gloss) of the leaf background leads to an increase in the survival of all targets and, for detectability by humans, enhances the camouflage effect of iridescence. The latter suggests that some prey, particularly iridescent ones, can increase their chance of survival against visually hunting predators even further by choosing glossier backgrounds. Our study is the first to present direct empirical evidence that biological iridescence can work as a form of camouflage, providing an adaptive explanation for its taxonomically widespread occurrence. Video Abstract
Iridescence in prey can serve a counterintuitive function: concealment The effects of this protective function are further enhanced by glossy backgrounds Iridescence, even for signaling purposes, may be less costly than previously thought This newly discovered function may explain the widespread occurrence of iridescence
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Affiliation(s)
- Karin Kjernsmo
- School of Biological Sciences, University of Bristol, Bristol BS8 1TQ, UK.
| | - Heather M Whitney
- School of Biological Sciences, University of Bristol, Bristol BS8 1TQ, UK
| | | | - Joanna R Hall
- School of Psychological Science, University of Bristol, Bristol BS8 1TU, UK
| | - Henry Knowles
- School of Biological Sciences, University of Bristol, Bristol BS8 1TQ, UK
| | - Laszlo Talas
- School of Psychological Science, University of Bristol, Bristol BS8 1TU, UK
| | - Innes C Cuthill
- School of Biological Sciences, University of Bristol, Bristol BS8 1TQ, UK
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44
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Kilchoer C, Pirih P, Steiner U, Wilts BD. Diffusive structural colour in Hoplia argentea. ACTA ACUST UNITED AC 2019; 222:jeb.213306. [PMID: 31767735 DOI: 10.1242/jeb.213306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 11/19/2019] [Indexed: 11/20/2022]
Abstract
Nature's nanostructures can bring about vivid and iridescent colours seen in many insects, notably in beetles and butterflies. While the intense structural colours can be advantageous for display purposes, they may also be appealing to predators and therefore constitute an evolutionary disadvantage. Animals often employ absorption and scattering in order to reduce the directionality of the reflected light and thereby enhance their camouflage. Here, we investigated the monkey beetle Hoplia argentea using microspectrophotometry, electron microscopy, fluorimetry and optical modelling. We show that the dull green dorsal colour comes from the nanostructured scales on the elytra. The nanostructure consists of a multi-layered photonic structure covered by a filamentous layer. The filamentous layer acts as a spatial diffuser of the specular reflection from the multilayer and suppresses the iridescence. This combination leads to a colour-stable and angle-independent green reflection that probably enhances the camouflage of the beetles in their natural habitat.
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Affiliation(s)
- Cédric Kilchoer
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Primož Pirih
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Vecna pot 111, 1000 Ljubljana, Slovenia
| | - Ullrich Steiner
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Bodo D Wilts
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
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45
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Kim JB, Lee GH, Kim SH. Interfacial Assembly of Amphiphilic Tiles for Reconfigurable Photonic Surfaces. ACS APPLIED MATERIALS & INTERFACES 2019; 11:45237-45245. [PMID: 31697465 DOI: 10.1021/acsami.9b17290] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nature has created photonic structures in cells and assembled them to make photonic layers for a living. Inspired from nature, we design amphiphilic photonic tiles and assemble them at air-water interface to compose highly reconfigurable photonic layers. The photonic tiles are prepared by photolithographically defining the shape of the disc using a photocurable dispersion of repulsive particles. The tiles are further treated by directional dry etching to selectively render top and side surfaces of the discs hydrophobic. The amphiphilic photonic tiles deform the air-water interface by gravity, which causes a strong attractive force driven by capillarity. Therefore, the tiles form two-dimensional (2D) dense-packing, which rapidly adapts dynamic fluctuation and shape change of the interface, providing highly reconfigurable photonic layers. In addition, the assembly can be transferred into target solid surfaces through the Langmuir-Blodgett method to make photonic coatings. Moreover, the amphiphilic tiles can be assembled on the surface of water drops, forming a photonic shell on liquid marbles which resembles photonic structures in nature. We believe that our strategy based on a 2D tile assembly at the free interface will provide a simple yet useful means to create photonic layers on various purposes.
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Affiliation(s)
- Jong Bin Kim
- Department of Chemical and Biomolecular Engineering , KAIST , Daejeon 34141 , Republic of Korea
| | - Gun Ho Lee
- Department of Chemical and Biomolecular Engineering , KAIST , Daejeon 34141 , Republic of Korea
| | - Shin-Hyun Kim
- Department of Chemical and Biomolecular Engineering , KAIST , Daejeon 34141 , Republic of Korea
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46
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Ren J, Wang Y, Yao Y, Wang Y, Fei X, Qi P, Lin S, Kaplan DL, Buehler MJ, Ling S. Biological Material Interfaces as Inspiration for Mechanical and Optical Material Designs. Chem Rev 2019; 119:12279-12336. [DOI: 10.1021/acs.chemrev.9b00416] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jing Ren
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Yu Wang
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Yuan Yao
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Yang Wang
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Xiang Fei
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, International Joint Laboratory for Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
| | - Ping Qi
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Shihui Lin
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Markus J. Buehler
- Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Shengjie Ling
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
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47
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Pavlović D, Rabasović MD, Krmpot AJ, Lazović V, Čurčić S, Stojanović DV, Jelenković B, Zhang W, Zhang D, Vukmirović N, Stepanenko D, Kolarić B, Pantelić DV. Naturally safe: Cellular noise for document security. JOURNAL OF BIOPHOTONICS 2019; 12:e201900218. [PMID: 31452335 DOI: 10.1002/jbio.201900218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/23/2019] [Accepted: 08/25/2019] [Indexed: 06/10/2023]
Abstract
Modern document protection relies on the simultaneous combination of many optical features with micron and submicron structures, whose complexity is the main obstacle for unauthorized copying. In that sense, documents are best protected by the diffractive optical elements generated lithographically and mass-produced by embossing. The problem is that the resulting security elements are identical, facilitating mass-production of both original and counterfeited documents. Here, we prove that each butterfly wing-scale is structurally and optically unique and can be used as an inimitable optical memory tag and applied for document security. Wing-scales, exhibiting angular variability of their color, were laser-cut and bleached to imprint cryptographic information of an authorized issuer. The resulting optical memory tag is extremely durable, as verified by several century-old insect specimens still retaining their coloration. The described technique is simple, amenable to mass-production, low cost and easy to integrate within the existing security infrastructure.
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Affiliation(s)
- Danica Pavlović
- Institute of Physics, University of Belgrade, Belgrade, Serbia
| | | | | | | | - Srećko Čurčić
- Institute of Zoology, University of Belgrade-Faculty of Biology, Belgrade, Serbia
| | - Dejan V Stojanović
- Institute of Lowland Forestry and Environment, University of Novi Sad, Novi Sad, Serbia
| | | | - Wang Zhang
- State Key Lab of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai, China
| | - Di Zhang
- State Key Lab of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai, China
| | | | | | - Branko Kolarić
- Institute of Physics, University of Belgrade, Belgrade, Serbia
- MNM Group, Department of Physics, UMONS, Mons, Belgium
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48
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Simpson RK, McGraw KJ. Interspecific Covariation in Courtship Displays, Iridescent Plumage, Solar Orientation, and Their Interactions in Hummingbirds. Am Nat 2019; 194:441-454. [DOI: 10.1086/704774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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49
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Wilts BD, Mothander K, Kelber A. Humidity-dependent colour change in the green forester moth, Adscita statices. Biol Lett 2019; 15:20190516. [PMID: 31530115 PMCID: PMC6769142 DOI: 10.1098/rsbl.2019.0516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 08/22/2019] [Indexed: 11/12/2022] Open
Abstract
The colours of insects serve important visual functions in aiding mate recognition, camouflage and warning. The display of insects is usually static, as cuticle coloration does not (or hardly) change during the lifespan of a mature imago form. Here, we describe a case of humidity-dependent, brilliant coloration in the green forester moth, Adscita statices. We show, by employing spectroscopic and ultrastructural methods, that the moth's colour results from the interference of incident light with an unusual hydrophilic melanized-chitin multilayer present in the wing scales. Humidity changes in the environment affect the multilayer properties, causing a significant shift of the green-peaking reflectance in the dry state to a rusty colour when damp, resulting in the strong colour change between day and dusk or dawn.
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Affiliation(s)
- Bodo D. Wilts
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Karolina Mothander
- Vision Group, Department of Biology, Lund University, Sölvegatan 35, 22362 Lund, Sweden
| | - Almut Kelber
- Vision Group, Department of Biology, Lund University, Sölvegatan 35, 22362 Lund, Sweden
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50
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Javůrková VG, Enbody ED, Kreisinger J, Chmel K, Mrázek J, Karubian J. Plumage iridescence is associated with distinct feather microbiota in a tropical passerine. Sci Rep 2019; 9:12921. [PMID: 31501471 PMCID: PMC6733896 DOI: 10.1038/s41598-019-49220-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 08/21/2019] [Indexed: 12/27/2022] Open
Abstract
Birds present a stunning diversity of plumage colors that have long fascinated evolutionary ecologists. Although plumage coloration is often linked to sexual selection, it may impact a number of physiological processes, including microbial resistance. At present, the degree to which differences between pigment-based vs. structural plumage coloration may affect the feather microbiota remains unanswered. Using quantitative PCR and DGGE profiling, we investigated feather microbial load, diversity and community structure among two allopatric subspecies of White-shouldered Fairywren, Malurus alboscapulatus that vary in expression of melanin-based vs. structural plumage coloration. We found that microbial load tended to be lower and feather microbial diversity was significantly higher in the plumage of black iridescent males, compared to black matte females and brown individuals. Moreover, black iridescent males had distinct feather microbial communities compared to black matte females and brown individuals. We suggest that distinctive nanostructure properties of iridescent male feathers or different investment in preening influence feather microbiota community composition and load. This study is the first to point to structural plumage coloration as a factor that may significantly regulate feather microbiota. Future work might explore fitness consequences and the role of microorganisms in the evolution of avian sexual dichromatism, with particular reference to iridescence.
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Affiliation(s)
- Veronika Gvoždíková Javůrková
- Faculty of Agrobiology, Food and Natural Resources, Department of Animal Science, Czech University of Life Sciences, Kamýcká 129, 165 00, Prague, Suchdol, Czech Republic.
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65, Brno, Czech Republic.
| | - Erik D Enbody
- Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, LA, USA
| | - Jakub Kreisinger
- Faculty of Science, Department of Zoology, Charles University, Viničná 7, 128 44, Prague, Czech Republic
| | - Kryštof Chmel
- Faculty of Science, Department of Zoology, Charles University, Viničná 7, 128 44, Prague, Czech Republic
- Faculty of Science, Department of Zoology, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic
| | - Jakub Mrázek
- Institute of Animal Physiology and Genetics, Czech Academy of Sciences, Vídeňská 1083, 160 00, Prague-Krč, Czech Republic
| | - Jordan Karubian
- Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, LA, USA
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