| Title |
Comparative Study on the Sampling Methods of Benthic Macroinvertebrates in the Fine Sediments of Freshwater |
| Authors |
김필재 ( Piljae Kim ) ; 김아름 ( Ah Reum Kim ) ; 권용주 ( Yongju Kwon ) ; 민정기 ( Jeong Ki Min ) ; 허인애 ( In Ae Huh ) ; 공동수 ( Dongsoo Kong ) |
| DOI |
https://doi.org/10.15681/KSWE.2017.34.1.84 |
| Keywords |
Benthic macroinvertebrate; Community structure; Sampling methods; Sediment |
| Abstract |
The community structure of benthic macroinvertebrates in the fine sediments of freshwater was analyzed according to various sampling tools and methods. The sediment core with the inner diameter of 7.5 cm was more effective in cost and labor in comparison to that of Φ 5 cm or Φ 10 cm. The number of species increased with the increase in sample size (replicates). When it was collected five times with the Φ 7.5 cm sediment core, Shannon-Weaver's diversity and McNaughton’s dominance of the sample reached about the 80 % level of the community estimates. Most species appeared in the sediment layer of 0-4 cm, and there were no newly recruited species below the depth of 4 cm. Individual abundance of benthic macroinvertebrates decreased exponentially along with the increase in sediment depth. Compared with the individual abundance of the 0-15 cm sediment layer, the abundance was 60 % in the 0-2 cm layer, 25 % in the 2-4 cm layer, 10 % in the 4-6 cm layer and 95 % in the 0-6 cm layer. Compared with organisms collected with the sieve of 0.2 mm pore, the number of species and the individual abundance sifted through the sieve with pore of 1 mm were 36 % and 88 %, and those with pore of 0.5 mm were 5 % and 55 %, respectively. |