Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Seasonal Variations of Epilithic Biofilm Biomass and Community Structure at Byeonsan Peninsula, Korea

한국 변산반도 암반생물막의 생물량과 군집구조의 계절 변화

  • Kim, Bo Yeon (Jeju Fisheries Research Institute, NFIS) ;
  • Park, Seo Kyoung (Institute of Coastal Management and Technology) ;
  • Lee, Jung Rok (Faculty of Biological Science and Institute for Environmental Science, Wonkwang University) ;
  • Choi, Han Gil (Faculty of Biological Science and Institute for Environmental Science, Wonkwang University)
  • 김보연 (국립수산과학원 제주수산연구소) ;
  • 박서경 ((주)연안관리기술연구소) ;
  • 이정록 (원광대학교 생명과학부 및 환경과학연구소) ;
  • 최한길 (원광대학교 생명과학부 및 환경과학연구소)
  • Received : 2016.11.18
  • Accepted : 2016.12.21
  • Published : 2016.12.30
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Abstract

The community structure and abundance of epilithic biofilm were bimonthly examined to know spatial and temporal patterns of biofilm biomass and taxonimical composition at the two study sites, Gosapo and Gyeokpo with different degrees of wave exposure levels from November 2010 to September 2011. Biomass was estimated by using chlorophyll a contents (Chl a), normalized difference vegetation index (NDVI), and vegetation index (VI). Cyanobacteria such as Aphanotece spp. predominated in the proportion of 57.53% at Gosapo and of 61.12% at Gyeokpo and they are abundant in mid shore and in summer at both study sites. The diatoms Navicula spp., Achnanthes spp. and Licmophora spp. were common species and they showed an increasing trend from high to low shore. NDVI, VI, and chl a contents were the greatest at mid shore for Gosapo (0.44, 3.05, $24.56{\mu}g/cm^2$) and at low shore for Gyeokpo (0.41, 2.73, $17.98{\mu}g/cm^2$). NDVI, VI, and chl a content were all maximal in January and minimal in March at the both sites. Average NDVI, VI, and chlorophyll a contents of biofilms were greater at Gosapo (0.43, 2.89, $22.84{\mu}g/cm^2$) than Gyeokpo (0.38, 2.48, $15.48{\mu}g/cm^2$).Of three shore levels(high, mid, and low) Chl a contents were positively correlated with NDVI and VI at the two study sites indicating that non-destructive NDVI and VI values can be used in stead of destructive Chl a extraction method. In conclusion, epilithic biofilm was more abundant seasonally in winter, vertically in mid and low intertidal zone, and horizontally at wave exposed shore than in summer, at high and sheltered shore in Korea.

암반생물막의 군집구조와 생물량의 시, 공간적인 변화를 확인하기 위하여, 파도에 대한 노출이 다른 고사포와 격포에서 11월부터 2011년 9월까지 격월로 암반조각을 채집하였다. 군집구조는 채집된 암반조각을 칫솔로 긁어 광학현미경하에서 미세조류의 분류군별 개체수를 계수하여 분석하였고, 생물량은 NDVI, VI, 엽록소 a 농도를 측정하여 확인하였다. 고사포와 격포의 조간대 암반생물막에서 가장 우점하는 분류군은 Aphanotece spp., Lyngbya spp.를 포함하는 남조류였으며, 환경스트레스가 적은 조간대 하부에서는 규조류의 출현율이 높게 나타났다. 암반생물막에서 우점하는 규조류는 Navicula spp., Achnanthes spp.와 Licmophora spp.로 확인되었다. 식생지수와 엽록소 a 농도는 격포에 비해 고사포 생물막에서 높게 나타났다. 식생지수인 NDVI와 VI는 고사포에서 각각 0.49-0.40(평균 0.43), 2.64-3.22(평균 2.90)였으며, 격포의 암반생물막은 NDVI와 VI가 각각 0.32-0.41(평균 0.38), 2.03-2.86(평균 2.48)으로 확인되었다. 엽록소 a의 농도는 고사포에서 $12.79-32.87{\mu}g/cm^2$(평균 $22.84{\mu}g/cm^2$)였고, 격포에서는 $11.14-18.25{\mu}g/cm^2$(평균 $15.48{\mu}g/cm^2$)로 식생지수와 마찬가지로 1월(겨울)에 최대, 3월(봄)에 최소인 계절 변화를 보였다. 엽록소 a 농도는 NDVI, VI와 양의 상관관계를 보여 비파괴적인 식생지수 측정방법이 파괴적인 엽록소 a 추출 방법을 대체할 수 있음을 알려준다. 결론적으로 암반생물막은 여름보다 겨울에, 조간대 상부보다 중부와 하부에서, 파도에 보호된 해안보다 노출된 해안에서 높은 값을 보였다.

Keywords

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