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Yellow-colored mats in Jeju Island lava tubes KCI 등재
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/389680
pp.1338-1348
The Geomunoreum Lava Tube System, declared as a UNESCO World Heritage Site, has a unique natural ecosystem. The information available about this ecosystem, which contains lava caves with secondary carbonate speleothems, is sparse. Hence, extensive research is warranted for establishing a conservation standard. We commenced microbial research on the system and have been studying the microorganisms coating the lava tube wall to acquire fundamental information for understanding the lava cave ecology of Jeju Island. Samples were collected from yellow-colored walls in six caves that are part of the system―the Bengdwi, Utsanjeon, Bukoreum, Manjang, Gimnyeong, and Yongcheon caves. This study focused on yellow walls as it is the most easily distinguished color. According to previous studies, the color of cave walls is attributed to microorganisms or their components. To determine whether the yellow mats from the Jeju lava tube walls are caused by microorganisms, we examined samples at the microscopic scale, by staining mats and analyzing bacterial isolates from glitter particles. As a result, we found that the yellow walls of lava tubes are comprised of microbial mats.
1. Introduction
2. Materials and Methods
2.1. Sampling
2.2. Chromatic image characterization ofyellow-colored mats
2.3. Chemical characterization
2.4. Staining and microscopy
3. Results and Discussion
3.1. Chromatic analysis of yellow wallsamples
3.2. Chemical analysis of yellow wallsamples
3.3. Microbial observation
3.4. Identification of cultured aerobicbacteria
4. Conclusion
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