說明
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.
資料紀錄
此資源sampling event的資料已發佈為達爾文核心集檔案（DwC-A），其以一或多組資料表構成分享生物多樣性資料的標準格式。 核心資料表包含 932 筆紀錄。
亦存在 2 筆延伸集的資料表。延伸集中的紀錄補充核心集中紀錄的額外資訊。 每個延伸集資料表中資料筆數顯示如下。
此 IPT 存放資料以提供資料儲存庫服務。資料與資源的詮釋資料可由「下載」單元下載。「版本」表格列出此資源的其它公開版本，以便利追蹤其隨時間的變更。
版本
以下的表格只顯示可公開存取資源的已發布版本。
如何引用
研究者應依照以下指示引用此資源。:
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
權利
研究者應尊重以下權利聲明。:
此資料的發布者及權利單位為 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 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: 3c89212d-104e-43ef-913a-bc71592551ff。 United States Geological Survey 發佈此資源，並經由GBIF-US同意向GBIF註冊成為資料發佈者。
關鍵字
Samplingevent
聯絡資訊
- 出處 ●
- 連絡人
- Senior (ST) Scientist
地理涵蓋範圍
San Francisco Bay, California
| 界定座標範圍 | 緯度南界 經度西界 [37.472, -122.472], 緯度北界 經度東界 [38.152, -121.688] |
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引用文獻
- 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
額外的詮釋資料
marine, harvest by iOBIS