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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.34, no.1, 2001³â, pp.20-29
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³²Á¶·ù¿¡ ÀÇÇØ ¹èÃâµÈ ¿ëÁ¸À¯±âź¼ÒÀÇ Æ¯¼º
( Properties of Dissolved Organic Carbon (DOC) released by Three Species of Blue- green Algae ) |
| ÃÖ±¤¼ø;;±è¹üö;; °¿ø´ëÇб³ ȯ°æÇаú;ÀϺ» ±¹¸³È¯°æ¿¬±¸¼Ò;°¿ø´ëÇб³ ȯ°æÇаú;ÀϺ» ±¹¸³È¯°æ¿¬±¸¼Ò;
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| ¼ø¼ö ¹è¾çÇÑ ³²Á¶·ù 3Á¾ (Microcystis aeruginosa, Anabaena flos-aquae, Oscillatoria agardhii)À» ´ë»óÀ¸·Î ½Ä¹°Çöûũſ¿¡ ÀÇÇÑ Ã¼¿Ü¹èÃâ ¿ëÁ¸À¯±âź¼Ò(extracelluar dissolved organic carbon:EOC)ÀÇ ¹èÃâ¾ç»ó, ÈÇÐÀû¼ººÐ, Àڿܼ±Èí±¤ Ư¼ºÀ» ¿¬±¸ÇÏ¿´´Ù. EOCÀÇ ÈÇÐÀû¼ººÐÀº XAD-8, ¾çÀÌ¿Â, À½À̿¼öÁö¸¦ ÀÌ¿ëÇÏ¿© ¼Ò¼ö¼º »ê (hydrophobic acids; AHSs), ¼Ò¼ö¼º Áß¼º (hydrophobic neutrals: HoNs), Ä£¼ö¼º »ê (hydrophilic acids; HiAs), Ä£¼ö¼º ¿°±â (hydrophilic bases; HiBs), ±×¸®°í Ä£¼ö¼º Áß¼º (hydrophilic neutrals; HiNs)À¸·Î ºÐ·ùÇÏ¿´´Ù. 3Á¾ÀÇ ³²Á¶·ù·ÎºÎÅÍ ¹èÃâµÈ EOCÀǾç°ú ÈÇÐÀûÁ¶¼ºÀº Á¾¸¶´Ù »óÀÌÇÏ¿´°í, Á¶·ùÀÇ ¼ºÀå´Ü°è¿¡ µû¶ó¼µµ ´Ù¸£°Ô ³ªÅ¸³µ´Ù. HiAs¼ººÐÀº ³²Á¶·ù°¡ ¹èÃâÇÑ EOCÀÇ °¡Àå ¸¹Àº ºÎºÐ(25${sim}$92%)À» Â÷ÁöÇß°í, Á¤Ã¼±â·Î °¥¼ö·Ï HiAs¼ººÐÀÌ Â÷ÁöÇÏ´Â ºñÀ²ÀÌ °¨¼ÒÇÏ¿´´Ù. ¹Ý¸é, HiBs¿Í HiNs ¼ººÐÀº Á¤Ã¼±â·Î ÁøÇàµÉ¼ö·Ï ºñÀ²ÀÌ Áõ°¡ÇÏ¿´´Ù. ƯÈ÷ HiNs¼ººÐÀº ¼ºÀåÃʱ⿡´Â °ÅÀÇ ¹èÃâµÇÁö ¾Ê´Ù°¡ Á¤Ã¼±â¿¡¼´Â Àüü EOCÀÇ »ó´çÇÑ ºÎºÐÀ» Â÷ÁöÇÏ¿´´Ù (M. aeruginosa: 44%, A. flos-aquae: 28%). AHSs¼ººÐÀº M. aeruginosa¿¡¼ 0.2${sim}$2.5%·Î ¸Å¿ì ÀÛ¾ÒÁö¸¸, A. flos-aquae(8.7${sim}$16%)¿Í O. agardhii (7.5${sim}$16%)¿¡¼´Â »ó´çÇÑ ºÎºÐÀ» Â÷ÁöÇß´Ù. ±×·¯³ª AHSsÀÇ ¹èÃâÀº M. aeruginosa¿Í O. agardhii¿¡¼ ¼ºÀåÀÌ ÁøÇàµÉ¼ö·Ï Áõ°¡ÇÑ ¹Ý¸é, A. flos-aquae¿¡¼´Â ¹Ý´ëÀÇ °æÇâÀ» º¸¿´´Ù. ³²Á¶·ù¿¡ ÀÇÇØ ¹èÃâµÈ EOCÀÇ Àڿܼ±Èí±¤ Ư¼ºµµ Á¾¿¡ µû¶ó »óÀÌÇÑ °á°ú¸¦ º¸¿´´Ù. º» ¿¬±¸ÀÇ °á°ú´Â ³²Á¶·ùÀÇ Á¾°ú ¼ºÀå´Ü°è¿¡ µû¶ó ¹èÃâµÇ´Â ¿ëÁ¸À¯±â¹°ÀÇ Æ¯¼ºÀÌ ´Ù¸£´Ù´Â °ÍÀ» ½Ã»çÇÑ´Ù. |
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| The amount, chemical composition and optical property of extracellular dissolved organic carbon (EOC) by phytoplankton were examined using axenic cultures of Microcystis aeruginosa, Anabaena flos-aquae, and Oscillatoria agardhii. The extracellular organic matter was categorized into five fractions (hydrophobic acids; AHSs, hydrophobic neutrals; HoNs, hydrophilic acids; HiAs, hydrophilic bases; HiBs, and hydrophilic neutrals; HiNs) using three adsorbent resins(XAD-8, cation, and anion). The release pattern and chemical composition of EOC varied with algal species and their growth phases. Percentage of extracellular release increased with age in all cultures. HiAs were the dominant component of EOC in all cultures, whereas the proportion of HiAs decreased with age in all cultures. In contrast, the proportions of HiBs and HiNs increased as cultures aged. In particular, the HiN fraction increased from 0% to 44% of EOC in M. aeruginosa and from 3.0% to 28% in A. flos-aquae, respectively. The proportion of AHSs was higher in the cultures of A. flos-aquae(7.5${sim}$16%) and O. agardhii (8.7${sim}$16%) than M. aeruginosa(0.2${sim}$2.5%). The proportions of AHSs increased with culture age in M. aeruginosa and O. agardhii, but decreased in A. flos-aquae. The specific UV absorbance also varied among species; 1.9 Abs${cdot}$cm$^{-1}$/mgC${cdot}$L$^{-1}$ for M. aeruginosa, 3.7 Abs${cdot}$cm$^{-1}$/mgC${cdot}$L$^{-1}$ for A. flos-aquae, and 13.0 Abs${cdot}$cm$^{-1}$/mgC${cdot}$L^{-1}$ for O. agardhii. The results of this study indicates that DOC excreted by three blue-green algae differed with species and the growth phase. |
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| Ű¿öµå |
| Extracelluar organic carbon;Fractionation;Blue-green algae;Growth phases; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.34, no.1, 2001³â, pp.20-29
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200118317176781)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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