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Original Articles

Cyanobacteria Akinete in Sediment Cores from the Gonggeomji Wetland in Korea

공검지 고퇴적물(paleo-sediments)에서 남조류 휴면포자 출현 및 형태 분석에 관한 연구

Daeryul Kwon1†
,
Chae-Hong Park2†
,
Keonhee Kim2
,
Hyeonjin Cho2
,
Jin-Young Lee3
,
Hoil Lee4
,
Sang Deuk Lee1*
권 대률1†
,
박 채홍2†
,
김 건희2
,
조 현진2
,
이 진영3
,
이 호일4
,
이 상득1*
1Protist Research Team, Microbial Research Department, Nakdonggang National Institute of Biological Resources, Sangju 37182, Korea
2Human and Eco Care Center, College of Sang-huh Life Science, Konkuk University, Seoul 05029, Korea
3Climate Change Response Division, Korea Insitute of Geoscience and Mineral Resources, Geologic Hazards Division, Daejeon 34132, Korea
4Active Tectonics Research Center, Korea Insitute of Geoscience and Mineral Resources, Geologic Hazards Division, Daejeon 34132, Korea
1국립낙동강생물자원관 미생물연구실 원생생물연구팀
2건국대학교 상허생명과학대학 휴먼앤에코케어센터
3한국지질자원연구원 기후변화대응연구본부
4한국지질자원연구원 지질재해연구본부
†These authors contributed equally to this work.
*Corresponding Author
30 June 2023. pp. 41-53
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Abstract

The purpose of this study was to investigate the distribution of akinete of Nostocales cyanobacteria in sediments in Gonggeom-ji expected to be lakes and wetlands, and to identify past ancient environments through chronological analysis results and akinete ecological features. The investigation target sites were conducted at 3 sites in the Gonggeom-ji area located in Sangju, and drilling was used to collect sedimentary soil. In order to analyze the formation period of the sedimentary layer, a chronological analysis was conducted, and the appearance, separation, and morphological characteristics of cyanobacteria akinete were conducted at intervals of 10cm. Two types of akinete were observed through a microscope, type 1 showed similar results to the length and width of akinete of the Dolichospermum genus mentioned in previous studies, and type 2 showed similar shapes to the length and width of akinete of the Aphanizomenon genus mentioned in previous studies. Therefore, the two types of akinetes from this study could be inferred as akinetes of the Dolichospermum and Aphanizomenon genus. Akinetes of type 1 were observed at St. 1 and 2, while akinetes of type 2 were observed at St. 2 and 3. The era of akinetes appeared in various sections from the 1,800 s to the 1,500 s BC. Cyanobacteria akinetes can be used as fossil indicators, and through these studies, valuable records of past environmental changes in the survey area can be obtained, and paleontological data can be used to interpret environmental changes in the lake.

Keywords
Akinte
Cyanobacteria
Gonggeomji Wetland
Paleo-sediment

본 연구는 호소 및 습지로 예상되는 공검지 지역 내 고퇴적물에서 염주말목(Nostocales) 남조류의 휴면포자(akinete)의 분포 및 남조류 발생 기록을 설명하고 연대분석 결과와 휴면포자 생태적 특징을 통하여 과거 고환경에 대해 파악하고자 하였다. 조사 대상 지점은 상주에 위치한 공검지 일대 3개 지점에서 진행하였으며 퇴적토를 채취하기 위하여 시추를 시용하였다. 퇴적층의 형성시기를 분석하기 위하여 연대분석을 진행하였으며, 채집된 샘플을 대상으로 10cm 간격으로 남조류 휴면포자의 출현 유무와 분리 및 형태적 특징 분석을 진행하였다. 현미경을 통해 관찰된 남조류 휴면포자는 두가지 형태가 관찰되었으며, type 1은 Dolichospermum (=Anabaena) 속의 휴면포자의 폭 및 너비와 비슷한 결과를 보였으며, type 2는 Aphanizomenon 속의 휴면포자의 형태와 유사한 특징을 나타냈다. 따라서, 본 연구에서 나온 2개의 휴면포자는 Dolichospermum 속과 Aphanizomenon 속의 휴면포자로 유추할 수 있었으며, type 1의 휴면포자는 St. 1, 2 지점에서 관찰이 된 반면, St. 2, 3에서는 type 2의 휴면포자가 관찰되어 지점 특이적인 분포양상을 보였다. 휴면포자가 출현한 연대는 기원전 1,800년대에서 1,500년대까지 다양한 구간에서 출현하였다. 남조류 휴면포자는 화석지표로 활용할 수 있으며 이러한 연구를 통하여 조사 지역의 과거 환경변화에 대한 귀중한 기록을 획득할 수 있으며 고생물 데이터를 통해 호수의 고환경변화에 대한 해석에 유용하게 이용될 수 있을 것이다.

키워드
고퇴적물
공검지
남조류
휴면포자
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Information
  • Publisher :The Korean Society of Phycology
  • Publisher(Ko) :한국조류학회
  • Journal Title :Aquatic Nature
  • Journal Title(Ko) :수생생물
  • Volume : 3
  • No :1
  • Pages :41-53
  • Received Date : 2023-06-14
  • Revised Date : 2023-06-21
  • Accepted Date : 2023-06-21
  • DOI :https://doi.org/10.23135/an.2023.3.1.4
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