Zooplankton densities collected from a seasonally hypoxic fjord (Hood Canal, Salish Sea, USA) on 2012-2013 cruises

Evento de muestreo
Última versión publicado por United States Geological Survey el ene. 16, 2024 United States Geological Survey

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This zooplankton dataset was collected as part of a larger study examining the effects of hypoxia on species composition, distributions, and predator-prey interactions between zooplankton and fish in a pelagic marine ecosystem. Day/night paired zooplankton sampling was conducted in Hood Canal, Puget Sound (Washington state, US), during 10 monthly cruises from June to October, 2012 and 2013, at five stations: Dabob, Union, Hoodsport, Duckabush and Twanoh. An obliquely towed multi-net system was used to collect depth stratified and full water column samples. For the depth-stratified sampling, depth layers were based on the dissolved oxygen profiles from CTD casts. In the laboratory, zooplankton were quantitatively subsampled and microscopically counted, with zooplankton densities calculated. All individuals were identified to species or larger taxonomic grouping, and by life stages for some species, within each sample. This dataset as published with OBIS incorporates corrections and updates to a dataset previously published on BCO-DMO.


Los datos en este recurso de evento de muestreo han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 345 registros.

también existen 2 tablas de datos de extensiones. Un registro en una extensión provee información adicional sobre un registro en el core. El número de registros en cada tabla de datos de la extensión se ilustra a continuación.

Event (core)

Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.


La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.

¿Cómo referenciar?

Los usuarios deben citar este trabajo de la siguiente manera:

Keister J E, Essington T, Horne J K, Parker-Stetter S, Herrmann B, Li L, Mayorga E, Winans A (2024). Zooplankton densities collected from a seasonally hypoxic fjord (Hood Canal, Salish Sea, USA) on 2012-2013 cruises. Version 1.2. United States Geological Survey. Samplingevent dataset. https://doi.org/10.15468/a7upu6


Los usuarios deben respetar los siguientes derechos de uso:

El publicador y propietario de los derechos de este trabajo es United States Geological Survey. Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).

Registro GBIF

Este recurso ha sido registrado en GBIF con el siguiente UUID: 5944ffd0-ba6f-413b-8414-54433a4f2d1e.  United States Geological Survey publica este recurso y está registrado en GBIF como un publicador de datos avalado por GBIF-US.

Palabras clave



Julie E. Keister
  • Proveedor De Los Metadatos
  • Originador
  • Punto De Contacto
  • Investigador Principal
University of Washington
Timothy Essington
  • Originador
  • Investigador Principal
University of Washington
John K. Horne
  • Originador
  • Investigador Principal
University of Washington
Sandra Parker-Stetter
  • Originador
  • Investigador Principal
Program Manager
NOAA Alaska Fisheries Science Center
BethElLee Herrmann
Lingbo Li
  • Originador
Fisheries Biologist
Fisheries and Oceans Canada
Emilio Mayorga
  • Proveedor De Los Metadatos
  • Originador
  • Procesador
Senior Oceanographer
University of Washington
Amanda Winans

Cobertura geográfica

Hood Canal in Puget Sound, Washington State, USA. Puget Sound is part of the Salish Sea.

Coordenadas límite Latitud Mínima Longitud Mínima [47,371, -123,125], Latitud Máxima Longitud Máxima [47,812, -122,807]

Cobertura taxonómica


Reino Animalia
Filo Chordata, Mollusca, Arthropoda, Annelida, Cnidaria, Bryozoa
Class Hydrozoa, Bivalvia, Ostracoda, Copepoda, Thecostraca, Larvacea, Polychaeta, Malacostraca, Gastropoda
Orden Trachymedusae, Calanoida, Siphonophorae, Euphausiacea, Pteropoda, Cyclopoida
Familia Metridinidae, Paracalanidae, Corycaeidae, Euphausiidae, Calanidae, Oithonidae, Diphyidae, Clausocalanidae, Oncaeidae, Rhopalonematidae, Limacinidae, Centropagidae, Acartiidae

Cobertura temporal

Fecha Inicial / Fecha Final 2012-06-11 / 2013-10-04

Datos del proyecto

Low dissolved oxygen (hypoxia) is one of the most pronounced, pervasive, and significant disturbances in marine ecosystems. Yet, our understanding of the ecological impacts of hypoxia on pelagic food webs is incomplete because of our limited knowledge of how organism responses to hypoxia affect critical ecosystem processes. In pelagic food webs, distribution shifts of mesozooplankton and their predators may affect predator-prey overlap and dictate energy flow up food webs. Similarly, hypoxia may induce shifts in zooplankton community composition towards species that impede energy flow to planktivorous fish. However, compensatory responses by species and communities might negate these effects, maintaining trophic coupling and sustaining productivity of upper trophic level species. To address the question "Does hypoxia affect energy flow from mesozooplankton to pelagic fish?", this study used a nested framework of hypotheses that considered two sets of processes alternatively responsible for either changes or maintenance of pelagic ecosystem energy flows. Improved understanding of how hypoxia impacts marine ecosystems will benefit the practical application of ecosystem-based management (EBM) in coastal and estuarine ecosystems. Effective application of EBM requires that the impacts of human activities are well understood and that ecological effects can be tracked using indicators. This project will contribute to both of these needs. The PIs and other study participants shared their findings on local and national levels with Federal, State, Tribal, and County biologists.

Título Consequences of hypoxia on food web linkages in a pelagic marine ecosystem
Identificador PelagicHypoxia
Fuentes de Financiación Funding Source: NSF Division of Ocean Sciences; Award Number: OCE-1154648
Descripción del área de estudio The study was conducted in Hood Canal, Washington state. Unlike most hypoxia-impacted estuaries, hypoxic regions of Hood Canal are in close proximity to sites that are not affected by hypoxia. This makes it logistically easier to conduct a comparative study and reduces the number of potential confounding factors when comparing areas that are far apart.
Descripción del diseño The project included multiple research cruises resulting in multiple datasets. A full list of datasets can be found at: https://www.bco-dmo.org/project/557504

Personas asociadas al proyecto:

Julie E. Keister

Métodos de muestreo

We conducted day/night paired zooplankton sampling in Hood Canal in June-October, 2012 and 2013. Sampling stations included Dabob, Union, Hoodsport, Duckabush, and Twanoh. A Hydrobios MultiNet (five-net capacity) was used to collect depth-stratified and full water column samples. Net mouth area was 0.25 m2; 200- and 335-um mesh nets were used to sample different size zooplankton. Nets were towed obliquely at 1-2.5 knots (slower tows for smaller mesh size), with inner and outer flow meters to measure water volume sampled. For the depth-stratified sampling, depth layers were based on the dissolved oxygen profiles from CTD casts. In the laboratory, zooplankton were quantitatively subsampled and microscopically counted. All individuals were identified to species or larger taxonomic grouping, and by life stages for some species, within each sample.

Área de Estudio Sampling conducted at 5 stations in Hood Canal, Puget Sound, Washington state, US. These stations are Dabob, Union, Hoodsport, Duckabush, and Twanoh. Day and night paired sampling took place during 10 monthly cruises from June to October, 2012 and 2013, spanning the period from 2012-06-11 to 2013-10-04.

Descripción de la metodología paso a paso:

  1. The starting point data file for OBIS Darwin Core alignment was obtained from a previous data submission to BCO-DMO available at doi:10.1575/1912/bco-dmo.682074.1. After downloading the file in csv format from the BCO-DMO ERDDAP server (https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_682074.csv), we performed the following revisions and corrections, based on more recent information from the PI's lab: - Assigned the correct timezone: PDT (local time, UTC-7), rather than UTC. - Populated missing times for 6 sampling events. - Corrected multiple life history stage entries. - Updated or corrected several taxa assignments. - Corrected a zooplankton density value. - Identified duplicate entries where only the zooplankton density values differed. In such cases, reduced the duplicates to single entries (17) with the mean density from the duplicate pairs.

Referencias bibliográficas

  1. Li, L., J.E. Keister, T.E. Essington and J. Newton. 2019. Vertical distributions and abundances of life stages of the euphausiid Euphausia pacifica in relation to oxygen and temperature in a seasonally hypoxic fjord. Journal of Plankton Research 41(2): 188–202, doi:10.1093/plankt/fbz009 https://doi.org/10.1093/plankt/fbz009
  2. Moriarty, P. E., T. E. Essington, J. K. J. E. Horne, Keister, L. Li, S. L. Parker-Stetter, and M. Sato. 2020. Unexpected food web responses to low dissolved oxygen in an estuarine fjord. Ecological Applications 30(8):e02204. doi:10.1002/eap.2204 https://doi.org/10.1002/eap.2204

Metadatos adicionales

The publication of this dataset in OBIS was supported by the Northwest Association of Networked Ocean Observing Systems (NANOOS, https://www.nanoos.org), the Regional Association of the national US Integrated Ocean Observing System (IOOS, https://ioos.noaa.gov) for the US Pacific Northwest.

Identificadores alternativos 5944ffd0-ba6f-413b-8414-54433a4f2d1e