Journal of the Korean Society of Marine Environment & Safety (해양환경안전학회지)

The Korean Society of Marine Environment and safety (해양환경안전학회)
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Analysis of Trophic Structure and Energy Flows in the Uljin Marine Ranching Area, Korean East Sea

울진 바다목장 생태계의 영양구조와 에너지 흐름

  • 김형철 (국립수산과학원 어장환경과) ;
  • 이재경 ((주)해양수산자원연구) ;
  • 김미향 ((주)해양수산자원연구) ;
  • 최병미 ((주)저서생물연구센터) ;
  • 서인수 ((주)저서생물연구센터) ;
  • 나종헌 ((주)저서생물연구센터)
  • Received : 2018.07.23
  • Accepted : 2018.10.26
  • Published : 2018.10.31
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Abstract

This study conducted 10 sampling sites survey 4 times to determine the trophic structure and energy flow of marine ecosystems for Uljin marine ranching area, Korean East Sea from March to October 2013. Based on the ecological characteristics of biological species, one used the non-Metric Multidimensional Scaling method based on the similarity of species. A total of 19 classified species groups formed categories including, top predators, seabirds, large pelagic fishes, small pelagic fishes, rockfishes, pleuronectiformes, benthic fishes, semi-benthic fishes, cephalopods, benthic feeders, epifauna, bivalves, abalone, Cnidaria, zooplankton, benthic algae, microalgae, phytoplankton and detritus. The biomass, production/biomass, consumption/biomass, diet composition data of each species groups to input data used in Ecopath mode estimated the trophic structure and energy flow of marine ecosystems in the Uljin marine ranching area. One estimated each species groups on the trophic level from 1 to 5.687. The sum of all consumption was estimated at $229.7t/km^2/yr$ and the sum of all exports was as estimated $3,432.4t/km^2/yr$. Total system throughput was at $6,796.2t/km^2/yr$, and the sum of all production was estimated at $3,613.1t/km^2/yr$. Net system production according to these results was estimated at $3,490.3t/km^2/yr$ and total biomass (excluding detritus) was estimated at $167.3t/km^2/yr$ in the Uljin marine ranching area.

본 연구는 울진 바다목장해역에 서식하는 생물을 대상으로 바다목장 관리를 위한 해양생태계의 영양구조와 에너지흐름을 파악하기 위한 목적으로 2013년 3월부터 10월까지 총 4회 현장조사를 실시하였다. 본 연구에서 개별 생물종들의 생태학적 특징에 따라 유사도에 근거한 비계량형다차원척도법을 사용하여 최고포식자, 바다새, 대형 및 소형유영어류, 볼락류, 가자미류, 저서어류, 반저서어류, 두족류, 저서섭이자, 표서동물, 이매패류, 전복, 자포동물, 동물플랑크톤, 부착성해조류, 미소해조류, 식물플랑크톤, 유기쇄설물 등 총 19가지로 생물그룹핑되었다. Ecopath 모델의 입력변수인 각 생물군들의 생체량, 생산량/생체량의 비, 섭식량/생체량의 비, 피식-포식관계 자료를 사용하여 울진 바다목장해역의 영양구조와 에너지 흐름을 추정하였다. 연구해역에서 각 생물군들의 영양단계는 1 ~ 5.687 범위로 파악되었다. 울진 바다목장 해역에 서식하는 모든 생물그룹들의 전체 소비량의 합은 $229.7t/km^2/yr$, 생물그룹들의 전체 이출량은 $3,432.4t/km^2/yr$이었다. 모든 생물그룹들의 총 에너지량은 $6,796.2t/km^2/yr$, 전체 생산량은 $3,613.1t/km^2/yr$로 추정되었다. 울진 바다목장 해역에서의 순 생태계 생산량은 $3,490.3t/km^2/yr$, 전체 생물군의 생체량은 $167.3t/km^2/yr$으로 추정되었다.

Keywords

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