Phytoplankton biomass, organic matter sedimentation and nutrient remineralization in a macrotidal estuary : Southampton Water
Phytoplankton biomass, organic matter sedimentation and nutrient remineralization in a macrotidal estuary : Southampton Water
The formation and fate of phytoplankton biomass generated during a spring bloom in the Southampton Water estuary has been investigated. In a detailed sampling programme, which included both water column and bottom sediments, major aspects of the phytoplankton ecology were assessed. The coupling between phytoplankton biomass, sedimentation and nutrient release from the uppermost bottom sediment layer (the oxic recently settled sediment, ORSS) was investigated during the spring bloom of 1992. The effect of the ORSS material on water column phytoplankton biomass production was investigated during the spring bloom in 1993 in controlled laboratory experiments.
The samples were collected from the water column and ORSS material at three sites along the main channel of the Southampton Water Estuary. The three sites: Sgn10, NW Netley and Calshot, which represented different estuarine regions, were sampled from the end of March until mid July of 1992 during the slack water high tide period. To carryout the controlled experiments, surface water from NW Netley was collected on four dates (18/05, 07/06, 21/06 and 10/08/1993) and incubated in the laboratory under constant temperature and irradiation in a double compartment chamber designed for the experiments. Measured variables included: dissolved inorganic nutrients (silicate, phosphate, nitrate, nitrate and ammonia), particulate organic matter (carbon and nitrogen) and photosynthetic pigments, assessed by high performance liquid chromatography (HPLC).
Phytoplankton biomass, which is limited by solar irradiation during the winter months, was dominated by diatoms throughout the spring bloom. Higher biomass was attained at the head of the estuary (at Sgn10) during a period of water column stratification which was directly associated to the freshwater input to the estuary.
University of Southampton
De Oliveira Proença, Luis Antonio
1994
De Oliveira Proença, Luis Antonio
De Oliveira Proença, Luis Antonio
(1994)
Phytoplankton biomass, organic matter sedimentation and nutrient remineralization in a macrotidal estuary : Southampton Water.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
The formation and fate of phytoplankton biomass generated during a spring bloom in the Southampton Water estuary has been investigated. In a detailed sampling programme, which included both water column and bottom sediments, major aspects of the phytoplankton ecology were assessed. The coupling between phytoplankton biomass, sedimentation and nutrient release from the uppermost bottom sediment layer (the oxic recently settled sediment, ORSS) was investigated during the spring bloom of 1992. The effect of the ORSS material on water column phytoplankton biomass production was investigated during the spring bloom in 1993 in controlled laboratory experiments.
The samples were collected from the water column and ORSS material at three sites along the main channel of the Southampton Water Estuary. The three sites: Sgn10, NW Netley and Calshot, which represented different estuarine regions, were sampled from the end of March until mid July of 1992 during the slack water high tide period. To carryout the controlled experiments, surface water from NW Netley was collected on four dates (18/05, 07/06, 21/06 and 10/08/1993) and incubated in the laboratory under constant temperature and irradiation in a double compartment chamber designed for the experiments. Measured variables included: dissolved inorganic nutrients (silicate, phosphate, nitrate, nitrate and ammonia), particulate organic matter (carbon and nitrogen) and photosynthetic pigments, assessed by high performance liquid chromatography (HPLC).
Phytoplankton biomass, which is limited by solar irradiation during the winter months, was dominated by diatoms throughout the spring bloom. Higher biomass was attained at the head of the estuary (at Sgn10) during a period of water column stratification which was directly associated to the freshwater input to the estuary.
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Published date: 1994
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Local EPrints ID: 458670
URI: http://eprints.soton.ac.uk/id/eprint/458670
PURE UUID: 93da977a-ba1b-4307-acc9-7901248d202e
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Date deposited: 04 Jul 2022 16:53
Last modified: 04 Jul 2022 16:53
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Author:
Luis Antonio De Oliveira Proença
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