fnctId=thesis,fnctNo=348
[2024] Characterizing fluvial impact on the biochemical composition of particulate organic matter in the Laptev Sea and Western East Siberian Sea during the late summer of 2018
- 작성자
- 권희진
- 저자
- 이상헌
- 발행사항
- 발행일
- 2024/12
- 저널명
- SCIENCE OF THE TOTAL ENVIRONMENT
- 국문초록
- 영문초록
- 조나은:공동(제1)-외부-선임기술원-국립해양생물자원관,김관우:공동(참여)-외부-POST-DOC-국립수산과학원,장효근:공동(참여)-외부-POST-DOC-국립수산과학원,박상훈:공동(참여)-내부-대학원생-부산대학교,김재순:공동(참여)-내부-대학원생-부산대학교,Whitledge, Terry E.:공동(참여)-외부-교수-University,Stockwell, Dean A.:공동(참여)-외부-교수-University,이상헌:공동(교신)-내부-교수-부산대학교
Abstract
The Laptev Sea (LS) and Western East Siberian Sea (W-ESS) are paradigmatic examples of seas dominated by terrestrial organic matter, attributed to substantial Siberian River discharges and coastal erosion. The influx of terrestrial organic matter significantly alters the biochemical composition of particulate organic matter (POM) in these Arctic coastal regions, potentially reducing the nutritional quality available to higher trophic levels. This study investigated the origin and qualitative characteristics of POM in the LS and W-ESS during the late summer of 2018 by analyzing elemental ratios (C/N ratio), stable carbon isotopes (δ13C), and biochemical compositions (biomolecular and amino acid (AA) compositions). The conspicuously depleted δ13C values (mean ± standard deviation (SD) = ?30.2 ± 0.5 ‰) and alongside elevated molar C/N ratios (mean ± SD = 18.1 ± 6.2) suggest that terrestrial organic matter is the predominant source of POM in the study area. Although carbohydrates (CHO) were the dominant biomolecules, their prevalence was higher in the river-influenced W-ESS region (67.7 ± 6.6 %) than in the LS region (58.6 ± 13.9 %; p < 0.05). Furthermore, the CHO composition was closely associated with freshwater content and river fraction, suggesting that the heightened contribution of CHO may stem from terrestrial organic matter delivered by river inputs. Lower concentrations of particulate hydrolyzable AA (PAA) and carbon and nitrogen normalized yields of AAs (AA-POC% and AA-PON%) along with reduced contribution of glycine suggested a substantial contribution of terrestrial POM to both LS and W-ESS POM. Overall, this study provides valuable insights into the terrestrial influence on POM composition in Arctic marine ecosystems, emphasizing the need for continued monitoring of the consequences of terrestrial carbon inputs in the changing Arctic environment.
- 일반텍스트
- (RCMS) 쿠로시오 해류로 인한 한반도 해양위기 대응기술 개발
- 첨부파일