Descrição
This Data Release makes available measurements of phytoplankton species composition, abundance and cell size made on samples collected in San Francisco Bay (CA) from April 1992 through March 2014. Phytoplankton samples were collected at 31 stations along a 145-km transect where the variability of salinity, temperature, turbidity and nutrient concentrations reflected a broad range of environmental factors that regulate phytoplankton growth and abundance (map of sampling locations is available on the project website at: https://sfbay.wr.usgs.gov/access/wqdata/overview/wherewhen/stnmap.html). Whole water samples were preserved with acid Lugol’s solution, and 2 to 50 ml aliquots were settled in chambers for 6 to 24 hours (Utermöhl 1958). Phytoplankton cells were then counted and identified using a phase-contrast inverted microscope at 125x magnification, all cells greater than 30 μm diameter were enumerated. Cells smaller than 30 μm were counted at 1250x magnification; following the APHA (1989) strip count method, at least 100 cells of the most numerous taxon were counted. Cell volumes were estimated from measured linear dimensions and geometric formulas that varied with cell shapes. Phytoplankton samples representing 923 distinct date, station and depths were included. The 16,442 entries in this dataset include 609 different taxa within 11 functional groups. Diatoms dominated the total biovolume contributed by each functional group (77%) followed by dinoflagellates (14%) and cryptophytes (4.5%). The top 5 species contributing to the summed biovolume in all samples were: Thalassiosira punctigera, Chaetoceros socialis, Ditylum brightwellii, Thalassiosira rotula and Noctiluca scintillans. By frequency of occurrence, the top 5 species were: Teleaulax amphioxeia, Nannochloropsis spp., Plagioselmis prolonga var. nordica, Skeletonema costatum and Thalassiosira eccentrica.
Registros de Dados
Os dados deste recurso de evento de amostragem foram publicados como um Darwin Core Archive (DwC-A), que é o formato padronizado para compartilhamento de dados de biodiversidade como um conjunto de uma ou mais tabelas de dados. A tabela de dados do núcleo contém 932 registros.
Também existem 2 tabelas de dados de extensão. Um registro de extensão fornece informações adicionais sobre um registro do núcleo. O número de registros em cada tabela de dados de extensão é ilustrado abaixo.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versões
A tabela abaixo mostra apenas versões de recursos que são publicamente acessíveis.
Como citar
Pesquisadores deveriam citar esta obra da seguinte maneira:
Nejad, E.S., Schraga, T.S., and Cloern, J.E., 2017, Phytoplankton Species Composition, Abundance and Cell Size in San Francisco Bay: Microscopic Analyses of USGS Samples Collected 1992-2014: U.S. Geological Survey data release
Direitos
Pesquisadores devem respeitar a seguinte declaração de direitos:
O editor e o detentor dos direitos deste trabalho é United States Geological Survey. To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.
GBIF Registration
Este recurso foi registrado no GBIF e atribuído ao seguinte GBIF UUID: 3c89212d-104e-43ef-913a-bc71592551ff. United States Geological Survey publica este recurso, e está registrado no GBIF como um publicador de dados aprovado por GBIF-US.
Palavras-chave
Samplingevent
Contatos
- Originador ●
- Ponto De Contato
- Senior (ST) Scientist
- Usuário
Cobertura Geográfica
San Francisco Bay, California
| Coordenadas delimitadoras | Sul Oeste [37,472, -122,472], Norte Leste [38,152, -121,688] |
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Citações bibliográficas
- Utermöhl, H. 1958. Zur Vervollkommnung der quantitativen Phytoplankton-Methodik. Mitt Int Verh Theor Angew Limnology 9:1-38. Not electronically available
- APHA. 1989. Standard methods for the examination of water and wastewater. 17th edn. American Public Health Association, Washington, DC. Not electronically available
- Hillebrand H, Durselen C, Kirschtel D, Pollingher U, Zohary T. 1999. Biovolume calculation for pelagic and benthic microalgae. Journal of Phycology 35:403–424. http://onlinelibrary.wiley.com/doi/10.1046/j.1529-8817.1999.3520403.x/abstract
- Wetzel RG, Likens GE. 1991. Limnological Analyses. 2nd edn. Springer-Verlag, New York. http://onlinelibrary.wiley.com/doi/10.1002/rrr.3450070410/epdf
Metadados Adicionais
marine, harvest by iOBIS
| Identificadores alternativos | https://www1.usgs.gov/obis-usa/ipt/resource?r=usgs_waterquality_sanfranciscobay_phytoplankton_1992_2014 |
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