The Influence of Fire Protection on Plant Community Changes in Sakunothayan Botanical Garden, Wang Thong District, Phitsanulok Province
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Abstract
The influence of fire protection on plant community changes was carried out to identify tree species and composition changed by the effect of long term fire protection at Sakunothayan Botanical Garden, Wangthong district, Phitsanulok province. Systematic sampling, in a total of 26 plots of size 20 m x 20 m, was done throughout the study area from March to June, 2017. Tree species, number of individual trees, and girth at breast height (GBH) were measured. Soil samples in each plot were also collected to be analyzed in a laboratory. Seventy nine species, 66 genera, and 34 families of trees were identified and enumerated. Pterocarpus macrocarpus, Millettia leucantha, and Dipterocarpus obtusifolius had the three highest values of IVI as 25.4%, 21.7% and 16.4%, respectively. Cluster analysis (CA) of tree data was used to separate plant communities into 3 groups as deciduous dipterocarp forest (DDF), mixed deciduous forest (MDF), and ecotone area (ECA) or secondary forest. After long term fire protection, the dominant tree species in DDF and ECA were not successful in regenerating because their seedlings and saplings could not establish and survive. Conversely, seedlings and saplings of dominant tree species in MDF were able to establish throughout the forest area. The effected of fire protection made soil moisture in MDF significantly different from DDF. Due to no forest fire to destroy them, the seedlings and saplings of MDF species could further survive and establish themselves. Therefore, the dominant species and tree composition of DDF gradually changed to MDF.
Long term fire protection was directly responsible in decreasing the area under DDF as the dominant tree species were not able to successfully undergo natural regeneration. Therefore the prescribed burning of forest in Sakunothayan Botanical Garden should be introduced to manage a successful natural regeneration, especially in DDF.
Article Details
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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