An Annual Phytoplankton Study in Coastal Waters off Eastern Long Island (Block Island Sound)

An Annual Phytoplankton Study in Coastal Waters off Eastern Long Island (Block Island Sound) Water samples were taken twice a month for 13 months in neritic waters off eastern Long Island. The purpose of the study was to investigate the annual phytoplankton cycle and related physical and chemical parameters associated with phytoplankton ecology. Seawater temperatures ranged between 1-22 °C, salinities were between 27.7-31.7%0, and pH averaged 7.83. Nitrate-N values may be close to limiting during the period from late May to early July; however, phosphorus levels appear to be satisfactory for phytoplankton growth. Oxygen readings were usually > 5.00 ml 1, while vitamin Bi 2 values averaged close to those found by others for coastal waters. Measurements of the phytoplankton included cell counts, Chlorophyll a, and Shannon species diversity index. A total of 125 species of planktonic algae were identified with the Bacillariophyta and Pyrrophyta contributing 93 and 25 species respectively. In terms of cell counts, Skeletonema costatum (Grev.) Cleve was the most numerous taxon; however, it was surpassed by Thalassiosira nordensktöldü Cleve and Ceratium tripos (Müll.) Nitzsch in terms of biomass. Introduction Block Island Sound is a body of water partly enclosed by Rhode Island to the north and Long Island, New York, to the south. The adjacent bodies of water http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Botanica Marina de Gruyter

An Annual Phytoplankton Study in Coastal Waters off Eastern Long Island (Block Island Sound)

Botanica Marina, Volume 21 (7) – Jan 1, 1978

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Publisher
de Gruyter
Copyright
Copyright © 2009 Walter de Gruyter
ISSN
0006-8055
eISSN
1437-4323
DOI
10.1515/botm.1978.21.7.439
Publisher site
See Article on Publisher Site

Abstract

Water samples were taken twice a month for 13 months in neritic waters off eastern Long Island. The purpose of the study was to investigate the annual phytoplankton cycle and related physical and chemical parameters associated with phytoplankton ecology. Seawater temperatures ranged between 1-22 °C, salinities were between 27.7-31.7%0, and pH averaged 7.83. Nitrate-N values may be close to limiting during the period from late May to early July; however, phosphorus levels appear to be satisfactory for phytoplankton growth. Oxygen readings were usually > 5.00 ml 1, while vitamin Bi 2 values averaged close to those found by others for coastal waters. Measurements of the phytoplankton included cell counts, Chlorophyll a, and Shannon species diversity index. A total of 125 species of planktonic algae were identified with the Bacillariophyta and Pyrrophyta contributing 93 and 25 species respectively. In terms of cell counts, Skeletonema costatum (Grev.) Cleve was the most numerous taxon; however, it was surpassed by Thalassiosira nordensktöldü Cleve and Ceratium tripos (Müll.) Nitzsch in terms of biomass. Introduction Block Island Sound is a body of water partly enclosed by Rhode Island to the north and Long Island, New York, to the south. The adjacent bodies of water

Journal

Botanica Marinade Gruyter

Published: Jan 1, 1978

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