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Effect of Covering the Soil with Naturally Degrading Polymer Film on the Benthic Macroinvertebrates Community Structure in Paddy Field

자연분해비닐 논토양 피복이 저서성 대형무척추동물의 군집구조에 미치는 영향

  • Park, Jin-Young (Department of Applied Biology, College of Ecology & Environmental Sciences, Kyungpook National University) ;
  • Kwon, Soon-Jik (Korea Ecosystem Service, Gasan-dong, Geumcheon-gu, Seoul Metropolitan Government) ;
  • Nam, Hong-Sik (Organic Agriculture Division, Department of Crop Life Safety, National Academy of Agricultural Science, RDA) ;
  • Kang, Chung-Kil (Organic Agriculture Division, Department of Crop Life Safety, National Academy of Agricultural Science, RDA) ;
  • Park, Jong-Kyun (Department of Applied Biology, College of Ecology & Environmental Sciences, Kyungpook National University)
  • 박진영 (경북대학교 생태환경대학 생물응용학과) ;
  • 권순직 ((주) 생태조사단) ;
  • 남홍식 (국립농업과학원 유기농업과) ;
  • 강충길 (국립농업과학원 유기농업과) ;
  • 박종균 (경북대학교 생태환경대학 생물응용학과)
  • Received : 2011.03.07
  • Accepted : 2011.06.20
  • Published : 2011.06.30

Abstract

This study was conducted to investigate the influence of natural degrading polymer film covering in rice paddies on the benthic macroinvertebrate community structure in Dangsu-dong, Suwon, Gyeonggi-do from May 2009 to September 2009. We compared 5 treatments: golden apple snail farming (GF), natural degrading polymer film + organic farming (NOF), natural degrading polymer film + chemical farming (NCF), conventional farming (CF), and no fertilization (NF) as the control. The total number of species was highest in NOF followed by GF, NF, NCF, and CF. The total number of individuals was highest in NOF followed by NCF, CF, NF, and GF. The Dominance index (DI) ranged from 0.43 to 0.95. The highest dominance index was in GF followed by NCF, NF=CF, and NOF. The species diversity index (H') for each experimental plot ranged from 0.49 to 2.93. The average species diversity index was highest in NOF followed by NF, GF, CF, and NCF. After the natural degrading polymer film covered the paddies, the benthic macroinvertebrates tended to recover, but leeches and aquatic beetles increased. Mollusca and Annelida, which are sensitive taxa, decreased in both species and individual numbers after the soil was covered with the natural degrading polymer film. The number of species tended to recover. However, the number of individuals continued to decrease.d, especially individuals. Since then, the number of species tended to recover. However, the number of individuals decreased.

Keywords

Benthic macroinvertebrates;Community structure;Natural degrading polymer film;Rice paddy

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