Mismatch between community respiration and the contribution of heterotrophic bacteria in the NE Atlantic open ocean: What causes high respiration in oligotrophic waters?
Clicks: 4
ID: 302337
2007
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This
article has not been analysed, so there is no overall score —
reader engagement is measured and shown alongside.
Reader Engagement
Steady Performance
0.9
/100
4 views
0 readers
AI Quality Assessment
Not analyzed
Readership in this journal
SteadyRanked #202 of 1,397 articles by views in journal of marine research
Most read
Least read
Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 1,397 in total.
Mint this article as an NFT
Not yet mintedCreate a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.
5
SUSD
one-off · no wallet required
Abstract
Heterotrophic bacteria have long been considered as the major respirers of the open ocean. During a survey in the eastern N Atlantic Subtropical Gyre we measured H-leucine heterotrophic bacterial production (BP), C particulate primary production (PPP) and the O2 community metabolism rates: gross primary production (GPP), net community production (NCP) and community respiration (CR). We estimated heterotrophic bacterial respiration (BR) from BP and literature models of bacterial growth efficiency [BGE BP/(BP BR)]. BP was an order of magnitude lower than PPP (integrated means of 17 2 and 207 29 mg C m d, respectively). Although volumetric PPP and GPP were significantly correlated (r 0.51; p 0.009; n 25), CR (1120 122 mg C m d) bore no significant relationship with either primary or heterotrophic bacterial production and exceeded GPP (578 117 mg C m d) at 5 out of 6 sampling stations. Integrated values of CR were only significantly correlated, but negatively, with chlorophyll a values (r 0.95; p 0.001; n 6). Integrated BR tended to decrease with increasing CR and, with a mean estimated BGE of 6%, it accounted on average for a much lower fraction of CR (33 7%) than currently assumed. By estimating the contributions of other trophic groups a large amount (48 10%) of the measured CR remained unaccounted for. This gap in respiration estimates casts some doubt on the magnitude of the net heterotrophic balance frequently observed in oligotrophic waters from changes of O2 over 24 h dark in vitro incubations.
| Reference Key |
openalex_W1969082961
Use this key to autocite in the manuscript while using
SciMatic Manuscript Manager or Thesis Manager
|
|---|---|
| Authors | Xosé Anxelu G. Morán, Valesca Pérez, Emilio Fernández |
| Journal | journal of marine research |
| Year | 2007 |
| DOI |
10.1357/002224007782689102
|
| URL | |
| Keywords | Keywords not found |
Citations
No citations found. To add a citation, contact the admin at info@scimatic.org
Comments
No comments yet. Be the first to comment on this article.