Slender orange-bush lichen (Teloschistes exilis) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from a trailway near Birch Creek Unit of Somerville Lake State Park. Texas

🎞️ #3613-05
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Lake Somerville - Sam Houston Forest, Texas, September 1 - 2, 2024

Album 3613: Lake Somerville - Sam Houston Forest, Texas, September 1 - 2, 2024

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The image presents two photographs showcasing the same lichen species, Teloschistes exilis, under different lighting conditions.

**Photograph 1: Regular Daylight**

* The top photograph displays the lichen exposed to regular daylight.
* It appears as a vibrant orange-yellow color with delicate branches and leaves that resemble those of a small bush or shrub.
* The lichen is attached to a thin branch, likely from a tree.

**Photograph 2: Ultraviolet (UV-A) Blacklight Illumination**

* The bottom photograph shows the same lichen illuminated by a 365 nm ultraviolet (UV-A) blacklight.
* Under UV-A light, the lichen exhibits an intense orange-red coloration.
* This suggests that the lichen contains pigments or other substances that fluoresce under UV radiation.

**Comparison of Lighting Conditions**

* The comparison between the two photographs highlights the dramatic effect of UV-A light on the appearance of the lichen.
* While it appears relatively dull and unremarkable in regular daylight, it transforms into a bright, eye-catching orange-red hue when exposed to UV-A radiation.

**Conclusion**

The image effectively demonstrates the unique properties of the slender orange-bush lichen (Teloschistes exilis) when illuminated by different types of light. The photographs provide valuable insights into the biology and behavior of this species, highlighting its ability to fluoresce under UV-A light. – AI vision

🇪🇸 Descripción en español / Spanish Description

El líquen delgado de arbusto naranja (Teloschistes exilis) cuando se expone a la luz diurna habitual y también cuando se ilumina con una lámpara negra ultravioleta de 365 nm desde una pista cerca de Birch Creek Unit of Somerville Lake State Park. Texas, 1 de septiembre de 2024. La imagen presenta dos fotografías que muestran la misma especie de líquen, Teloschistes exilis, en diferentes condiciones de iluminación. **Fotografía 1: Luz diurna regular** * La fotografía superior muestra el líquen expuesto a luz diurna habitual. * Aparece como un vibrante color naranja amarillo con ramas y hojas delicadas que se asemejan a las de un pequeño arbusto o matorral. * El líquen está unido a un delgado ramo, probablemente de un árbol. **Fotografía 2: Iluminación ultravioleta (UV-A)** * La fotografía inferior muestra el mismo líquen iluminado por una lámpara negra ultravioleta de 365 nm. * Bajo la luz UV-A, el líquen exhibe un intenso matiz naranja rojo. * Esto sugiere que el líquen contiene pigmentos u otras sustancias que fluorescen bajo radiación UV. **Comparación de condiciones de iluminación** * La comparación entre las dos fotografías resalta el efecto drástico de la luz UV-A sobre el aspecto del líquen. * Mientras aparece relativamente aburrido e inadvertido a simple vista, se transforma en un tono naranja rojo brillante y llamativo cuando se expone a radiación UV-A. **Conclusión** La imagen muestra efectivamente las propiedades únicas del líquen delgado de arbusto naranja (Teloschistes exilis) cuando se ilumina con diferentes tipos de luz. Las fotografías proporcionan valiosas pistas sobre la biología y el comportamiento de esta especie, resaltando su habilidad para fluorescer bajo radiación UV-A. – Spanish translation

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