ลักษณะของสารอินทรีย์ละลายน้ำที่ชะละลายจากใบแสมขาวด้วยเทคนิค Fluorescence Excitation-Emission Matrix (FEEM) Spectroscopy
Characterizing the Dissolved Organic Matter (DOM) Leached from Avicennia alba Leaves Using Fluorescence Excitation-Emission Matrix (FEEM) Spectroscopy
Keywords:
สารอินทรีย์ละลายน้ำ , ต้นแสมขาว , การชะละลาย , FEEM spectroscopy, dissolved organic matter , Avicennia alba , leachingAbstract
สารอินทรีย์ละลายน้ำ มีบทบาทสำคัญในระบบนิเวศแหล่งน้ำ อย่างไรก็ตามบทบาทของ DOM จะขึ้นอยู่กับลักษณะของ DOM นั้น การศึกษาในครั้งนี้มีวัตถุประสงค์เพื่อศึกษาลักษณะของ DOM ที่ถูกชะละลายจากเศษซากของพรรณใบแสมขาว ด้วยเทคนิค FEEM Spectroscopy ผลการศึกษาพบว่าลักษณะของ DOM ที่ถูกชะละลายจากใบแสมขาวทั้งสองช่วงอายุ ได้แก่ ใบเหลืองและใบเขียว มีความคล้ายคลึงกัน โดยมีสารแทนนินเป็น องค์ประกอบหลัก อย่างไรก็ตามไม่พบ DOM ชนิดอื่นซึ่งแตกต่างจากผลการศึกษาในพันธุ์ไม้ชายเลนชนิดอื่น ความแตกต่างดังกล่าวจะมีผลต่อบทบาทและการเกิดปฏิกิริยาของ DOM ที่ปลดปล่อยจากพันธ์ไม้แต่ละชนิดที่มีต่อสิ่งแวดล้อม ในส่วนของปริมาณ DOM ที่ปลดปล่อยพบว่า DOM จากใบเหลืองมีปริมาณมากกว่าใบเขียว Dissolved Organic Matter (DOM) has an important role in aquatic ecosystems. However, role of DOM is depended on its characteristics. This study investigated the characteristics of leached DOM from Avicennia alba leaves using FEEM spectroscopy technique. The results showed that the characteristic of DOM derived from two ages leaves (yellow and green leaves) are similar. Tannin was the major component in all leached DOM samples which differed from other mangrove species. This mightaffect to the roles of DOM that derived from mangrove leaf litter of each species in the bioavailability and geochemical cycling in the environment. For DOM production, yellow leaf derived higher amount of DOM than green leaf.References
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