liu.seSearch for publications in DiVA
Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Chemodiversity of dissolved organic matter in the Amazon Basin
University of Maryland, MD 20688 USA.
University of Federal Rio de Janeiro, Brazil; Helmholtz Zentrum Munchen, Germany.
Helmholtz Zentrum Munchen, Germany; Technical University of Munich, Germany.
Helmholtz Zentrum Munchen, Germany.
Vise andre og tillknytning
2016 (engelsk)Inngår i: Biogeosciences, ISSN 1726-4170, E-ISSN 1726-4189, Vol. 13, nr 14, s. 4279-4290Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Regions in the Amazon Basin have been associated with specific biogeochemical processes, but a detailed chemical classification of the abundant and ubiquitous dissolved organic matter (DOM), beyond specific indicator compounds and bulk measurements, has not yet been established. We sampled water from different locations in the Negro, Madeira/Jamari and Tapajos River areas to characterize the molecular DOM composition and distribution. Ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) combined with excitation emission matrix (EEM) fluorescence spectroscopy and parallel factor analysis (PARAFAC) revealed a large proportion of ubiquitous DOM but also unique area-specific molecular signatures. Unique to the DOM of the Rio Negro area was the large abundance of high molecular weight, diverse hydrogen-deficient and highly oxidized molecular ions deviating from known lignin or tannin compositions, indicating substantial oxidative processing of these ultimately plant-derived polyphenols indicative of these black waters. In contrast, unique signatures in the Madeira/Jamari area were defined by presumably labile sulfur-and nitrogen-containing molecules in this white water river system. Waters from the Tapajos main stem did not show any substantial unique molecular signatures relative to those present in the Rio Madeira and Rio Negro, which implied a lower organic molecular complexity in this clear water tributary, even after mixing with the main stem of the Amazon River. Beside ubiquitous DOM at average H / C and O / C elemental ratios, a distinct and significant unique DOM pool prevailed in the black, white and clear water areas that were also highly correlated with EEM-PARAFAC components and define the frameworks for primary production and other aspects of aquatic life.

sted, utgiver, år, opplag, sider
COPERNICUS GESELLSCHAFT MBH , 2016. Vol. 13, nr 14, s. 4279-4290
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-131588DOI: 10.5194/bg-13-4279-2016ISI: 000381212300014OAI: oai:DiVA.org:liu-131588DiVA, id: diva2:974635
Merknad

Funding Agencies|FAPERJ; CAPES; CNPq; Alexander von Humboldt; DAAD; STINT; VR; Cientista do Nosso Estado from FAPERJ

Tilgjengelig fra: 2016-09-27 Laget: 2016-09-27 Sist oppdatert: 2018-10-05

Open Access i DiVA

fulltext(4091 kB)223 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 4091 kBChecksum SHA-512
7e67310a06e8ec2d4c1d2e0a9304fe643dc4ea494e224c145432c88e7662fec7dfb7051a9fb2dd077c5ab04969c699e4c2cccac0023618a526e8144165676fa8
Type fulltextMimetype application/pdf

Andre lenker

Forlagets fulltekst

Søk i DiVA

Av forfatter/redaktør
Bastviken, DavidEnrich Prast, Alex
Av organisasjonen
I samme tidsskrift
Biogeosciences

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 223 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

doi
urn-nbn

Altmetric

doi
urn-nbn
Totalt: 298 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf