Data Name (This will be the displayed title in Catalog)
Zooplankton Center of Gravity
Indicator Name (as exists in ecodata)
New Indicator
Family (Which group is this indicator associated with?)
[ ] Oceanographic
[ ] Habitat
[X] Lower trophic levels
[ ] Megafauna
[ ] Social
[ ] Economic
Data Description
Model-based annual center of gravity indices for zooplankton groups sampled by NEFSC surveys
Introduction to Indicator (Please explain your indicator)
Zooplankton are primary consumers in marine ecosystems that transfer energy from phytoplankton to fish, marine mammals, and birds. The Northeast Fisheries Science Center has conducted zooplankton surveys since the 1970s. Spatially explicit indices of abundance for several zooplankton groups were estimated using spatio-temporal modeling.
The groups include:
Copepods
Calanus finmarchicus, = Large copeopds SOE (used in small-large index)
Small copeopods SOE (used in small-large index): Centropages typicus, Pseudocalanus spp., Temora longicornis, Centropages hamatus
Euphausiids
Zooplankton volume
Key Results and Visualization
Small copepods in fall are trending northeast similar to forage fish and aggregated survey species. Small copepods in spring are trending north. Large copepods in fall are trending west, similar to benthos. No significant change for Calfin, Euphausiids, or Zooplankton volume center of gravity over time.
Implications
Distribution shifts for zooplankton may result in mismatches with zooplankton feeding fish, marine mammal, and seabirds.
Spatial Scale
Full shelf
Temporal Scale
Spring (January-June), Fall (July-December)
Synthesis Theme
[X] Multiple System Drivers
[ ] Regime Shifts
[ ] Ecosystem Reorganization
Define Variables
Waiting until we aggregate the datasets, if formatted similarly to forage and benthos, the cog data will be part of the zooplankton indices dataset
Primary Contact
Sarah.Gaichas@noaa.gov
Secondary Contact
No response
Data Name (This will be the displayed title in Catalog)
Zooplankton Center of Gravity
Indicator Name (as exists in ecodata)
New Indicator
Family (Which group is this indicator associated with?)
Data Description
Model-based annual center of gravity indices for zooplankton groups sampled by NEFSC surveys
Introduction to Indicator (Please explain your indicator)
Zooplankton are primary consumers in marine ecosystems that transfer energy from phytoplankton to fish, marine mammals, and birds. The Northeast Fisheries Science Center has conducted zooplankton surveys since the 1970s. Spatially explicit indices of abundance for several zooplankton groups were estimated using spatio-temporal modeling.
The groups include:
Copepods
Calanus finmarchicus, = Large copeopds SOE (used in small-large index)
Large copepods ALL: Calanus finmarchicus, Metridia lucens, Calanus minor, Eucalanus spp., Calanus spp.
Small copepods ALL: Centropages typicus, Pseudocalanus spp., Temora longicornis, Centropages hamatus, Paracalanus parvus, Acartia spp., Clausocalanus arcuicornis, Acartia longiremis, Clausocalanus furcatus, Temora stylifera, Temora spp., Tortanus discaudatus, Paracalanus spp.
Small copeopods SOE (used in small-large index): Centropages typicus, Pseudocalanus spp., Temora longicornis, Centropages hamatus
Euphausiids
Zooplankton volume
Key Results and Visualization
Small copepods in fall are trending northeast similar to forage fish and aggregated survey species. Small copepods in spring are trending north. Large copepods in fall are trending west, similar to benthos. No significant change for Calfin, Euphausiids, or Zooplankton volume center of gravity over time.
Implications
Distribution shifts for zooplankton may result in mismatches with zooplankton feeding fish, marine mammal, and seabirds.
Spatial Scale
Full shelf
Temporal Scale
Spring (January-June), Fall (July-December)
Synthesis Theme
Define Variables
Waiting until we aggregate the datasets, if formatted similarly to forage and benthos, the cog data will be part of the zooplankton indices dataset
Indicator Category
If other, please specify indicator category
No response
Data Contributors
Sarah Gaichas and Harvey Walsh
Point(s) of Contact
Sarah Gaichas Sarah.Gaichas@noaa.gov
Affiliation
NEFSC
Public Availability
Source data are NOT publicly available.
Accessibility and Constraints
Request from Harvey Walsh, harvey.walsh@noaa.gov