Estimates of oceanic mesozooplankton production: a comparison using the Bermuda and Hawaii time-series data

Roman, Michael R.; Adolf, H.A.; Landry, Michael R.; Madin, Laurence P.; Steinberg, Deborah K.; Zhang, X.

doi:10.1016/s0967-0645(01)00099-6

Cited by 65 publications

(47 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We assumed that the zooplankton community in the aphotic zone crops ca. 15% of the sinking aggregates from PP ( ) supported by Roman et al (1990), similar to mean values (≈13.6%) obtained by Roman et al (2002), and roughly 1 out of 6 (≈16.7%) dominant species of copepods occurring in the North Sea below the thermocline (Koski et al, 2011). The sinking non-grazed fraction of PP (…”

Section: _66supporting

confidence: 79%

Exposure factors for marine eutrophication impacts assessment based on a mechanistic biological model

Cosme

Koski

Hauschild

2015

Ecological Modelling

View full text Add to dashboard Cite

Document Version Peer reviewed version Link back to DTU Orbit Citation (APA):Cosme, N. M. D., Koski, M., & Hauschild, M. Z. (2015). Exposure factors for marine eutrophication impacts assessment based on a mechanistic biological model. Ecological Modelling, 317, 50-63. DOI: 10.1016/j.ecolmodel.2015.09.005 Cosme et al. / Ecological Modelling 317 (2015 AbstractEmissions of nitrogen (N) from anthropogenic sources enrich marine waters and promote planktonic growth. This newly synthesised organic carbon is eventually exported to benthic waters where aerobic respiration by heterotrophic bacteria results in the consumption of dissolved oxygen (DO). This pathway is typical of marine eutrophication. A model is proposed to mechanistically estimate the response of coastal marine ecosystems to N inputs. It addresses the biological processes of nutrient-limited primary production (PP), metazoan consumption, and bacterial degradation, in four distinct sinking routes from primary (cell aggregates) and secondary producers (faecal pellets, carcasses, and active vertical transport). Carbon export production (P E ) and ecosystems eXposure Factors (XF), which represents a nitrogen-to-oxygen 'conversion' potential, were estimated at a spatial resolution of 66 large marine ecosystem (LME), five climate zones, and site-generic. The XFs obtained range from 0.45 (Central Arctic Ocean) to 15.9 kgO 2 ·kgN -1 (Baltic Sea). While LME resolution is recommended, aggregated P E or XF per climate zone can be adopted, but not global aggregation due to high variability. The XF is essential to estimate a marine eutrophication impacts indicator in Life Cycle Impact Assessment (LCIA) of anthropogenic-N emissions. Every relevant process was modelled and the uncertainty of the driving parameters considered low suggesting valid applicability in characterisation modelling in LCIA.

show abstract

Section: _66supporting

confidence: 79%

Exposure factors for marine eutrophication impacts assessment based on a mechanistic biological model

Cosme

Koski

Hauschild

2015

Ecological Modelling

View full text Add to dashboard Cite

show abstract

“…Methods for zooplankton biomass estimation are relatively standard and calculated values have been reported for different areas worldwide (Fernández de Puelles et al 2003, Hays et al 2001, Irigoien and Castel 1995, Kimmerer and McKinnon 1987, Melo Júnior et al 2007, Rawlinson et al 2005, Roman et al 2002. However, data are generally obtained from samples collected with nets of mesh diameter ranging from 64 to 300 μm.…”

Section: Discussionmentioning

confidence: 99%

Mesozooplankton biomass and copepod estimated production in a temperate estuary (Mondego estuary): effects of processes operating at different timescales

et al. 2015

View full text Add to dashboard Cite

Background: A fundamental step in characterizing marine planktonic communities is the knowledge of the variability of their biomass and production, in order to assess the flux of matter through the food web and estimate the fate of this energy. The zooplankton assemblage's dynamics of the Mondego estuary (Portugal) have been extensively characterized, but none have focused on biomass and secondary production. In the present study, zooplankton biomass and secondary production were investigated with a seasonal basis in a fixed station, located at the mouth of the Mondego estuary (Portugal), with emphasis on the copepod community. In order to study the influence of physical processes operating at different temporal scales, sub-surface and near-bottom samples were collected every 2 h in diel and tidal cycles, over neap tides. Results: Copepods dominated the biomass during spring (0.585 ± 0.671 mg C m

show abstract

“…Zooplankton basal metabolic rates were tuned within uncertainty ranges to ensure consistency with observed mesozooplankton biomass and productivity in subtropical gyres (Landry et al, 2001;Roman et al, 2002). Simultaneously, half-saturation constants for zooplankton feeding were calibrated to capture observed trends in the relationship between phytoplankton biomass and turnover times (Stock and Dunne, 2010).…”

Section: (Cmip5;mentioning

confidence: 99%

Drivers of trophic amplification of ocean productivity trends in a changing climate

2014

View full text Add to dashboard Cite

Abstract. Pronounced projected 21st century trends in regional oceanic net primary production (NPP) raise the prospect of significant redistributions of marine resources. Recent results further suggest that NPP changes may be amplified at higher trophic levels. Here, we elucidate the role of planktonic food web dynamics in driving projected changes in mesozooplankton production (MESOZP) found to be, on average, twice as large as projected changes in NPP by the latter half of the 21st century under a high emissions scenario in the Geophysical Fluid Dynamics Laboratory's ESM2M-COBALT (Carbon, Ocean Biogeochemistry and Lower Trophics) earth system model. Globally, MESOZP was projected to decline by 7.9 % but regional MESOZP changes sometimes exceeded 50 %. Changes in three planktonic food web properties -zooplankton growth efficiency (ZGE), the trophic level of mesozooplankton (MESOTL), and the fraction of NPP consumed by zooplankton (zooplankton-phytoplankton coupling, ZPC), explain the projected amplification. Zooplankton growth efficiencies (ZGE) changed with NPP, amplifying both NPP increases and decreases. Negative amplification (i.e., exacerbation) of projected subtropical NPP declines via this mechanism was particularly strong since consumers in the subtropics have limited surplus energy above basal metabolic costs. Increased mesozooplankton trophic level (MESOTL) resulted from projected declines in large phytoplankton production. This further amplified negative subtropical NPP declines but was secondary to ZGE and, at higher latitudes, was often offset by increased ZPC. Marked ZPC increases were projected for high-latitude regions experiencing shoaling of deep winter mixing or decreased winter sea iceboth tending to increase winter zooplankton biomass and enhance grazer control of spring blooms. Increased ZPC amplified projected NPP increases in the Arctic and damped projected NPP declines in the northwestern Atlantic and Southern Ocean. Improved understanding of the physical and biological interactions governing ZGE, MESOTL and ZPC is needed to further refine estimates of climate-driven productivity changes across trophic levels.

show abstract

Estimates of oceanic mesozooplankton production: a comparison using the Bermuda and Hawaii time-series data

Cited by 65 publications

References 55 publications

Exposure factors for marine eutrophication impacts assessment based on a mechanistic biological model

Exposure factors for marine eutrophication impacts assessment based on a mechanistic biological model

Mesozooplankton biomass and copepod estimated production in a temperate estuary (Mondego estuary): effects of processes operating at different timescales

Drivers of trophic amplification of ocean productivity trends in a changing climate

Contact Info

Product

Resources

About