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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.34, no.4, 2001³â, pp.261-266
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ÀÌź½ÀÁö¿¡¼ ÀÌ»êÈź¼ÒÀÇ ³óµµ°¡ Á¶·ùÀÇ Áõ½Ä, ¸Þź »êÈ ¹× ¾Æ»êÈÁú¼Ò »ý¼º¿¡ ¹ÌÄ¡´Â ¿µÇâ
( Impacts of Elevated $CO_2$ on Algal Growth, $CH_4$ Oxidation and $N_2O$ Production in Northern Peatland ) |
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| ÀÌ»êÈź¼Ò ³óµµ°¡ Áõ°¡ÇÒ ¶§¿¡ ºÏ±¸ ÀÌź ½ÀÁö¿¡¼ ³ªÅ¸³ª´Â »ýÁöÈÇÐÀû º¯È°úÁ¤À» »ìÆìº¸¾Ò´Ù. Ç¥¸é ½Ä»ýÀ» Æ÷ÇÔÇÑ ¿ÂÀüÇÑ Äھ ºÏ¿þÀϽºÀÇ ÀÌź½ÀÁö·ÎºÎÅÍ Ã¤ÃëÇÏ¿©, ³ôÀº ÀÌ»êÈź¼Ò³óµµ(700ppm)¿Í ÀÚ¿¬»óÅ (350ppm)ȯ°æ¿¡¼ 4°³¿ù°£ ¹è¾çÇÏ¿´´Ù. ¹è¾ç ÈÄ, ÈÇÐÀûÀÎ ÀúÇØÁ¦¸¦ ÀÌ¿ëÇÏ¿© ½ÀÁö Åä¾ç¿¡¼ ¹Ì·®±âüÀÇ »ý¼º°ú ¼Òºñ¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¸ÞźÀÇ °æ¿ì, ºÒȸÞź($CH_3F$)¸¦ ÀÌ¿ëÇÏ¿© ¸Þź »êÈÀ²À» °áÁ¤ÇÏ¿´°í, Áú»êÈ¿Í Å»ÁúÀÛ¿ëÀ» ÃøÁ¤ÇϱâÀ§ÇØ ¾Æ¼¼Æ¿·»($C_2H_2$)ÀúÇØ ¹æ¹ýÀ» Àû¿ëÇÏ¿´´Ù. À̸¦ À§ÇØ, ¸ÕÀú °¢ ÃøÁ¤ ¹æ¹ýÀ» ½ÀÁö ½Ã·á¿¡ ÀûÇÕÇϵµ·Ï ÃÖÀûÈ ½ÃÄ×°í, µÑ°·Î µÎ ¼öÁØÀÇ ÀÌ»êÈź¼Ò¿¡¼ ¹è¾çÇÑ ½Ã·á¿¡ ÀÌ ¹æ¹ýµéÀ» Àû¿ëÇÏ¿´´Ù. ³ôÀº ÀÌ»êÈź¼Ò ³óµµ´Â ¸ÞźÀÇ »ý¼º·®À» Áõ°¡ ½ÃÄ×À¸³ª(210´ë $100;ng;CH_4 g^{-1};hr^{-1}$), ¸Þź »êÈÀÇ ¾çµµ Áõ°¡½ÃÄѼ (128´ë $15;ng;CH_4 g^{-1};hr^{-1}$) °á±¹¿¡´Â ¼ø¸Þź ¹æÃâ·®¿¡´Â º¯È°¡ ¾ø¾ú´Ù. ¾Æ»êÈÁú¼ÒÀÇ °æ¿ì¿¡´Â Áõ°¡µÈ ¹ß»ý·®ÀÌ Å»Áú º¸´Ù´Â Áú»êÈ °úÁ¤¿¡¼ »ý¼ºµÈ °ÍÀ¸·Î »ç·áµÈ´Ù. ÀÌ·¯ÇÑ º¯ÈµéÀº ³ôÀº ÀÌ»êÈź¼Ò ÇÏ¿¡¼ Á¶·ùÀÇ ¼ºÀåÀÌ Áõ°¡µÇ¾î ¾ß±âµÈ °ÍÀ¸·Î ÃßÃøµÈ´Ù. |
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| Effects of elevated carbon dioxide ($CO_2$) on soil microbial processes were studied in a northern peatland. Intact peat cores with surface vegetation were collected from a northern Welsh fen, and incubated either under elevated carbon dioxide (700 ppm) or ambient carbon dioxide (350 ppm) conditions for 4 months. Higher algal biomass was found under the elevated $CO_2$ condition, suggesting $CO_2$ fertilization effect on primary production, At the end of the incubation, trace gas production and consumption were analyzed using chemical inhibitors. For methane ($CH_4$ ), methyl fluoride ($CH_3F$) was applied to determine methane oxidation rates, while acetylene ($C_2H_2$) blocking method were applied to determine nitrification and denitrification rates. First, we have adopted those methods to optimize the reaction conditions for the wetland samples. Secondly, the methods were applied to the samples incubated under two levels of $CO_2$. The results exhibited that elevated carbon dioxide increased both methane production (210 vs. $100;ng;CH_4 g^{-1};hr^{-1}$) and oxidation (128 vs. $15;ng;CH_4 g^{-1};hr^{-1}$), resulting in no net increase in methane flux. For nitrous oxide ($N_2O$) , elevated carbon dioxide enhanced nitrous oxide emission probably from activation of nitrification process rather than denitrification rates. All of these changes seemed to be substantially influenced by higher oxygen diffusion from enhanced algal productivity under elevated $CO_2$. |
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| Ű¿öµå |
| Greenhouse gas;Mire;Global climatic changes;Wetland;Methane oxidizer;Denitrifying bacteria; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.34, no.4, 2001³â, pp.261-266
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200118317178599)
¾ð¾î : ¿µ¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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