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Study of environmental factors affecting the diversity of lichens in mangrove forests in the Ban Namrab area, Bang Sak Subdistrict, Kantang District, Trang Province during the rainy and summer seasons

Organization(s):Wichienmatu
Country:Thailand
Student(s):Mr.Pakphum Madnui Miss Nattanicha Panklom Miss Waratchaya Songsua
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Member(s):Jiraporn Sirirat
Contributors:
Report Type(s):Virtual Science Symposium Report
Protocols:Relative Humidity, Air Temperature, Conductivity, Dissolved Oxygen, pH, Salinity, Water Temperature, Soil pH, Soil Fertility
Presentation Poster: View Document
Language(s):English
Date Submitted:2026-01-30
We are collecting soil samples in order to analyze soil fertility, salinity, electrical conductivity, and soil pH. In addition, we are collecting water samples to examine water temperature, salinity, electrical conductivity, pH, and dissolved oxygen. Moreover, we are measuring air temperature and relative humidity to assess atmospheric conditions in the study area. Furthermore, we are establishing lichen study plots to investigate the diversity of lichen species. Finally, we are using the observed morphological characteristics of lichens to examine and compare different lichen species.
This project studies the environmental factors affecting lichen diversity during the rainy seasons and summer in the mangrove forest of Ban NamRab, Bang Sak Subdistrict, Kantang District, Trang Province. The study was conducted in two seasons: the rainy season (November-December 2025) and the summer (December 2025-January 2026). The results showed similar pH and temperature values in both seasons. In the summer , water salinity was 23.6 ± 0.16 ppt and electrical conductivity was 30.75 ± 3.14 mS/cm, differing from the water quality in the rainy season. Soil quality, including salinity and electrical conductivity, did not differ significantly. However, soil fertility (N, P, K) and pH differed significantly from the rainy season. Air temperature was 30.7 ± 0.18 °C, which was higher than in the rainy season. It was found that 11 species of lichens were present during the rainy season and 21 species summer . Two species, Amandinea punctata and Cryptothecia sp., were found in both the rainy and summer. It was observed that in the summer, water quality, including salinity and electrical conductivity, differed significantly from the rainy season. Soil quality, including fertility (N, P, K), air temperature, and relative humidity, also differed compared to the summer, resulting in greater lichen diversity in the summer .


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