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Çѱ¹È¯°æ»ý¹°ÇÐȸ / v.24, no.2, 2006³â, pp.172-178
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( Effects of Sediment Harvesting on Bacterial Community Structure ) |
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°ñÀçäÃë°¡ ¼öÃþÀÇ ¼¼±Õ±ºÁý±¸Á¶¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ¾Ë¾Æº¸±â À§ÇØ ³«µ¿° Áß·ù, °ñÀçäÃë°¡ ÀÌ·ç¾î ÁöÁö ¾ÊÀº ¼ö¿ªÀÎ ±¸¹Ì´ë±³¿Í Àå±â°£¿¡ °ÉÃÄ ¿¬¼ÓÀûÀ¸·Î °ñÀçäÃë°¡ ÇàÇØÁö´Â Áö¿ªÀÎ ¼ºÁÖ±º ¼ÒÇи® (¼ºÁÖ´ë±³ ÀαÙ)¿¡¼ $alpha;eta;gamma-subclass$ proteobacteria, Cytophaga-Flavobacterium (CF) group ¼¼±Õ±º°ú Ȳ»ê¿°È¿ø¼¼±ÕÀ» FISH¹ýÀ¸·Î Á¤·®ºÐ¼®ÇÏ¿´´Ù. ¾Æ¿ï·¯ ¼ö¿Â, pH, EC, ¿±·Ï¼Ò-$alpha$ ¾ç µîÀÇ ÀÌÈÇÐÀûÀΠȯ°æ¿äÀεµ ÃøÁ¤ÇÏ¿´´Ù. DAPI·Î ¿°»öµÈ ¼¼±Õ¼ö·Î ÃøÁ¤ÇÑ ÃѼ¼±Õ¼öÀÇ °æ¿ì, µÎ Á¤Á¡°£ÀÇ °ý¸ñÇÒ ¸¸ÇÑ ¾çÀûÀÎ Â÷ÀÌ´Â ¾ø¾úÀ¸³ª ±× ½Ã°£Â÷¿¡ µû¸¥ º¯µ¿ÀÌ °ñÀçäÃë ¼ö¿ª¿¡¼ ´õ¿í ½ÉÇß´Ù. ¶ÇÇÑ ³ôÀº ¿±·Ï¼Ò-$alpha$ ¾çÀ» ³ªÅ¸³½ °ñÀçäÃë ¼ö¿ª¿¡¼ °ËÃâÇÑ CF group ¼¼±Õ±º°ú Ȳ»ê¿°È¯¿ø¼¼±ÕÀÌ ÃѼ¼±Õ¼ö¿¡¼ Â÷ÁöÇÏ´Â ºñÀ²ÀÌ ºñ°ñÀçäÃë ¼ö¿ª¿¡ ºñÇØ ³ô¾Ò´Ù. À̰°Àº °á°ú´Â Àú´ÏÁúÀÌ ¼öÃþÀ¸·Î ÀçÀ¯ÀԵǾú±â ¶§¹®À¸·Î ÆÇ´ÜµÈ´Ù. ±×·¯³ª º» ¿¬±¸¿¡¼ °ËÃâÇÑ ¼¼±Õ±ºÀÌ ÃѼ¼±Õ¼ö¿¡¼ Â÷ÁöÇÏ´Â ºñÀ²À» ÇÕÇÏ¸é ±× ºñÀ²Àº °ñÀçäÃë ¼ö¿ªº¸´Ù ºñ°ñÀçäÃë ¼ö¿ª¿¡¼ ´õ ³ô¾Ò´Ù. FISH¹ý¿¡ ÀÇÇÑ ¼¼±ÕÀÇ °ËÃâ°¡´É¼ºÀÌ ÇØ´ç¼¼±ÕÀÇ ¹°Áú´ë»ç´É°ú ¿¬°üÀÌ ÀÖÀ¸¹Ç·Î °ñÀçäÃë ¼ö¿ª¿¡¼ÀÇ ³·Àº ¼¼±Õ °ËÃâÀ²Àº °ñÀçäÃë°¡ ¼¼±ÕÀÇ ¹°Áú¼øÈ¯¿¡¼ÀÇ ¿ª±â´ÉÀ» ÃÊ·¡Çϰí ÀÌ´Â ¶ÇÇÑ ¿¬Â÷ÀûÀ¸·Î ±×µéÀÇ ¸ÔÀÌ¿¬¼â¿¡ ºÎÁ¤ÀûÀÎ ¿µÇâÀ» ¹ÌÄ¥ °¡´É¼ºÀ» ½Ã»çÇÏ´Â °ÍÀÌ´Ù. |
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The dynamics of bacterial populations belonging to $alpha;eta;gamma-subclass$ proteobacteria, Cytophaga-Flavobacterium (CF) group and sulfate reducing bacteria (SRB) in water column of the middle reaches of Nakdong River depending on sediment harvesting were analyzed by fluorescent in situ hybridization (FISH) at sediment harvesting site (near the Seongju bridge) and non-sediment harvesting site (near the Gumi bridge). In addition, some physico-chemical parameters such as temperature, pH, $chi-alpha$ and electrical conductivity were measured. Regarding the number of total cell counts, cells stained by DAPI, there were no substantial quantitative differences between both sites, but those fluctuation at sediment Harvesting site was greater. And also the ratios of CFgroup and SRB to total cell counts tend to increase at sediment harvesting site with higher $chl-alpha$, maybe due to the resuspension of sediment into water column. But the total proportion of all determined bacterial populations to total cell counts were greater at non-sediment harvesting site, compared with those at sediment harvesting site. Since the detectibility of bacteria by FISH depends on their metabolic activity, those lower proportion at the sediment harvesting site implies that sediment harvesting may lead to malfunction of those bacteria respect to nutrient recycling and subsequently negative effects on microbial food web. |
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Ű¿öµå |
Nakdong River;sediment harvesting;CFgroup;SRB;FISH;EC;$chi-alpha$; |
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ȯ°æ»ý¹° / v.24, no.2, 2006³â, pp.172-178
Çѱ¹È¯°æ»ý¹°ÇÐȸ
ISSN : 1226-9999
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200629734084265)
¾ð¾î : Çѱ¹¾î |
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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