KOPRI Repository

Sources of organic matter in two contrasting tropical coastal environments: The Caribbean Sea and the eastern Pacific

Cited 0 time in wos
Cited 0 time in scopus
Metadata Downloads
Title
Sources of organic matter in two contrasting tropical coastal environments: The Caribbean Sea and the eastern Pacific
Other Titles
두 대조적인 열대 연안 환경인 카리비안해와 동태평양에서의 유기물 기원 파악
Authors
C. Huguet
Kim, Junghyun
C. Gonzalez-Arango
V. Ramirez-Valencia
S. Kang
갈종구
K.-H. Shin
Keywords
Caribbean; Eastern tropical pacific; Glycerol dialkyl glycerol tetraethers (GDGTs); Terrestrial input; n-alkanes
Issue Date
2019
Citation
C. Huguet, et al. 2019. "Sources of organic matter in two contrasting tropical coastal environments: The Caribbean Sea and the eastern Pacific". JOURNAL OF SOUTH AMERICAN EARTH SCIENCES, 96(1): 102349-102358.
Abstract
In this study, we evaluate sources of organic matter (OM) in two contrasting tropical coastal environments in Colombia, using a combination of glycerol dialkyl glycerol tetraethers (GDGTs) and n-alkane lipid biomarkers. A clear difference between the less productive Caribbean Sea and the more productive eastern Pacific is observed, with higher terrestrial contributions into the eastern Pacific strongly associated with riverine inputs. Although higher land plant-derived n-alkanes can be transported as eolian dust, our results suggest mainly riverine sources for our samples. When looking at the branched GDGT compositions, in situ production could be identified in most Caribbean stations and some of the more coastal sites in the Pacific with #ringstetra index values of above 0.7. The remaining stations in the eastern Pacific display soil-eroded GDGTs inputs associated with river discharges and deposited in the proximity of the coast. Marine production as measured by short chain n-alkanes and crenarchaeol are also higher in the eastern Pacific. It appears that the terrestrial inputs would bring nutrients as well as OM fueling both auto- and heterotrophs making the eastern Pacific overall more productive. We also observe OM of petrogenic origin, albeit in a low amount, especially in coastal Caribbean sites located near main harbors. This study helps improve the understanding of the complex mixture of OM inputs, origins and transport mechanisms into Colombian coastal areas. The present work emphasizes the need to integrate climate, geological setting and hydrology to fully understand the carbon cycle at a regional scale.
URI
http://repository.kopri.re.kr/handle/201206/10222
DOI
http://dx.doi.org/10.1016/j.jsames.2019.102349
Files in This Item
There are no files associated with this item.
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse