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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.37, no.3, 2004³â, pp.304-312
¿ÜºÎ ȯ°æ¿µÇâ¿¡ ´ëÇÑ ¹Ðµµºñ ÀÇÁ¸ 3¿µ¾ç´Ü°èÀÇ °³Ã¼±º µ¿Å ¸ðµ¨
( Modeling on Ratio-Dependent Three-Trophic Population Dynamics Responding to Environmental Impacts )
ÀÌ»óÈñ;ÃÖ°æÈñ;Àüżö; ºÎ»ê´ëÇб³ ¹°¸®Çаú;ºÎ»ê´ëÇб³ »ý¸í°úÇкÎ;ºÎ»ê´ëÇб³ »ý¸í°úÇкÎ;
 
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¼ö »ýÅÂ°è ³»¿¡¼­ ÈçÈ÷ º¼ ¼ö ÀÖ´Â 3¿µ¾ç´Ü°è ¸ÔÀ̻罽 ±¸Á¶¸¦ ÀÌ·ç´Â Á¾µéÀÌ ¹Ðµµºñ ÀÇÁ¸ ¸ðµ¨·Î½á ±¸Çö µÉ ¶§ ¿ÜºÎ ȯ°æ¿¡ ´ëÇØ¼­ ¾î¶»°Ô ¹ÝÀÀÇÏ´ÂÁö¸¦ ¿¬±¸ÇÏ¿´´Ù. ȯ°æ ¿äÀÎÀº ÁÖ±âÀû ¿äÀΰú ÀϹÝÀû ³ëÀÌÁî µÎ ºÎºÐÀ¸·Î ³ª´©¾ú´Ù. ÁÖ±âÀû ¿äÀÎÀÌ ¿Âµµ·Î½á ´ëÇ¥µÇ¾úÀ» ¶§ ¿Âµµº¯À̸¦ ¹ÙÀ̾¿Í ÁÖ±â·Î ³ª´©¾ú°í, ±âŸ º¹ÇÕÀûÀÎ ³ëÀÌÁî´Â °¡¿ì½º ºÐÆ÷·Î ³ªÅ¸³»¾ú´Ù. ¿Âµµº¯ÀÌ ¹ÙÀ̾ ${varepsilon}$, ¿ÂµµÁÖ±â ${Omega}$, ¹× °¡¿ì½º ³ëÀÌÁî Å©±â ${'{O}}$°¡ ¼­·Î °áÇÕÇÏ¿© 3¿µ¾ç´Ü°è ¸ÔÀ̻罽¿¡¼­ °³Ã¼±º ¸êÀýÀ» Æ÷ÇÔÇÑ ´Ù¾çÇÑ °³Ã¼±º µ¿Å¸¦ º¸¿© ÁÖ¾ú´Ù. º¯¼öÀÇ ÀûÀýÇÑ °ª¿¡ µû¶ó '¾ÈÁ¤µÈ Á¦ÇÑ »çÀÌŬ'À̳ª 'ÀÌ»óÇÑ ²ø°³'¸¦ º¸¿© ÁÖ¾úÀ¸¸ç, ÀüüÀûÀ¸·Î °³Ã¼±º µ¿Å´ ȯ°æ º¯¼ö¿¡ µû¶ó ¹Î°¨ÇÏ°Ô ¹ÝÀÀÇÏ¿´°í, Æ÷½ÄÀÚ ¹× ÃÖ»óÀ§Æ÷½ÄÀÚ °³Ã¼±ºÀÇ ¸êÀý½Ã°£ÀÌ Á¶ÀýµÇ¾ú´Ù.
The transient dynamics of three-trophic populations (prey, predator, and super predator) using ratio-dependent models responding to environmental impacts is analyzed. Environmental factors were divided into two parts: periodic factor (e.g., temperature) and general noise. Periodic factor was addressed as a frequency and bias, while general noise was expressed as a Gaussian distribution. Temperature bias ${varepsilon}$, temperature frequency ${Omega}$, and Gaussian noise amplitude ${`{O}}$ accordingly revealed diverse status of population dynamics in three-trophic food chain, including extinction of species. The model showed stable limit cycles and strange attractors in the long-time behavior depending upon various values of the parameters. The dynamic behavior of the system appeared to be sensitive to changes in environmental input. The parameters of environmental input play an important role in determining extinction time of super predator and predator populations.
 
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Lotka-Volterra equations;population dynamics;stable limit cycle;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.37, no.3, 2004³â, pp.304-312
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200418317183139)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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