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Çѱ¹È¯°æ»ýÅÂÇÐȸ / v.22, no.2, 2008³â, pp.152-158
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( The Effects of the Breeding site of the Egrets and Herons by Road Construction, Palhyun-ri, Daegu, Korea ) |
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| This survey was conducted to analyze the effect of road construction near the group breeding places of the egrets and herons located at Palhyun-ri, Daegu, on their breeding during four years from 2003 to 2006. With the number of the individuals of the whole egrets and herons have been decreased due to the three-year road construction work(2003-2005). When the road construction was temporally stopped in 2006, the number of individuals of egrets and herons except Cattle egret Bubulcus ibis increased and partocilarly, the Gray heron Ardea cinerea was found to have been influenced the most by this construction in comparison with other egrets and herons. The number od individuals of large egrets, little egrets and herons was found to decrease during the construction period. After cutting off the nest trees and removing some parts of the breeding site, the herons and egrets tended to move their nesting place from roadsides to the inside of the breeding area. Trees for the nests decreased due to the increase in fellen trees caused by bird nests per tree increased gradually. As for the formation ratio of trees for the nests, the ratio of pine trees lowered yearly while that of acacia and oak trees was increasing during the survey. |
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| Ű¿öµå |
| µµ·Î°Ç¼³ ¿µÇâ;µÕÁö¼ö;±³¶õ;ROAD CONSTRUCTION EFFECT;NEST NUMBERS;DISTURBANCES; |
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Çѱ¹È¯°æ»ýÅÂÇÐȸÁö / v.22, no.2, 2008³â, pp.152-158
Çѱ¹È¯°æ»ýÅÂÇÐȸ
ISSN : 1229-3857
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200820055487979)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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