Species Diversity and Biomass of Mangrove Tree at Khlong Kam Phuan in Ranong Province
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Abstract
At the time of the 2004 tsunami geological disaster, the area around the Kamphuan Canal area, Ranong province, Thailand was extensively damaged, especially the plants in the mangrove forest. Later, the area was preserved in its existing natural state. Currently, government agencies and the private and public sectors are placing increased importance on biological diversity, with Thailand having the goal of carbon neutrality by 2050. The objectives of this study were to assess diversity and to estimate the biomass of tree species in the mangrove forest at Khlong Kam Phuan, Ranong Province, Thailand. A permanent plot (40 m x 300 m) was established and later divided into 10 m x 10 m square sub-plots, resulting in a total of 120 plots. Tree data were collected on all plants with a diameter at breast height (dbh) ≥ 3.2 cm. For tree species that produced large pneumatophores, such as Rhizophora apiculata and R. mucronata, the measurement was conducted at 20 cm above the root collar. ln addition, a sub-plot size of 4 m x 4 m was sampled for the sapling stage (dbh < 3.2 cm but total height ≥ 1.3 m). Finally, a plot size of 1 m x 1 m was used to collect seedling data (total height < 1.3 m).
Based on the analysis of the results, there were 1,422 individuals in the study area, consisting of 1,294 trees, 52 saplings and 76 seedlings. Based on identification and classification, the individuals belonged to 5 families, 7 genera and 11 species. Based on plant habit, there were 7 tree species; 3 small tree species and 1 shrub species. The Rhizophoraceae was the most dominant family, represented by 5 species. The species diversity index or Shannon-Wiener index (H') was less than 1.22 based on the variety of plant species. ln addition, the species richness and species evenness were 1.39 and 0.51 respectively. Rhizophora apiculata, Rhizophora mucronate and Bruguiera cylindrica were the top-3 species with order of importance index values of 165.02, 72.46 and 24.96 %, respectively. The averages of height and dbh of the trees were 11.18 cm and 9.31 m, respectively. The total biomass was 459.70 t ha -1, consisting of 359.03 t ha -1 of above ground biomass and 100.67 t ha -1 of underground biomass.
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ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ขอรับรองว่า ต้นฉบับที่เสนอมานี้ยังไม่เคยได้รับการตีพิมพ์และไม่ได้อยู่ในระหว่างกระบวนการพิจารณาตีพิมพ์ลงในวารสารหรือสิ่งตีพิมพ์อื่นใด ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ยอมรับหลักเกณฑ์และเงื่อนไขการพิจารณาต้นฉบับ ทั้งยินยอมให้กองบรรณาธิการมีสิทธิ์พิจารณาและตรวจแก้ต้นฉบับได้ตามที่เห็นสมควร พร้อมนี้ขอมอบลิขสิทธิ์ผลงานที่ได้รับการตีพิมพ์ให้แก่วารสารวนศาสตร์ คณะวนศาสตร์ มหาวิทยาลัยเกษตรศาสตร์ กรณีมีการฟ้องร้องเรื่องการละเมิดลิขสิทธิ์เกี่ยวกับภาพ กราฟ ข้อความส่วนใดส่วนหนึ่ง หรือ ข้อคิดเห็นที่ปรากฏในผลงาน ให้เป็นความรับผิดชอบของข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) แต่เพียงฝ่ายเดียว และหากข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ประสงค์ถอนบทความในระหว่างกระบวนการพิจารณาของทางวารสาร ข้าพเจ้าและผู้เขียนร่วม (ถ้ามี) ยินดีรับผิดชอบค่าใช้จ่ายทั้งหมดที่เกิดขึ้นในกระบวนการพิจารณาบทความนั้น”
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