Nitrogen, phosphorus, silica, and carbon in Moreton Bay, Queensland, Australia: Differential limitation of phytoplankton biomass and production

Glibert, Patricia M., Heil, Cynthia A., O'Neil, Judith M., Dennison, William C. and O'Donohue, Mark J. H. (2006) Nitrogen, phosphorus, silica, and carbon in Moreton Bay, Queensland, Australia: Differential limitation of phytoplankton biomass and production. Estuaries and Coasts, 29 2: 209-221. doi:10.1007/BF02781990


Author Glibert, Patricia M.
Heil, Cynthia A.
O'Neil, Judith M.
Dennison, William C.
O'Donohue, Mark J. H.
Title Nitrogen, phosphorus, silica, and carbon in Moreton Bay, Queensland, Australia: Differential limitation of phytoplankton biomass and production
Journal name Estuaries and Coasts   Check publisher's open access policy
ISSN 1559-2723
1559-2731
Publication date 2006
Sub-type Article (original research)
DOI 10.1007/BF02781990
Volume 29
Issue 2
Start page 209
End page 221
Total pages 13
Place of publication Port Republic
Publisher Estuarine Research Federation
Collection year 2006
Language eng
Subject C1
270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)
770302 Living resources (incl. impacts of fishing on non-target species)
Abstract Subtropical estuaries have received comparatively little attention in the study of nutrient loading and subsequent nutrient processing relative to temperate estuaries. Australian estuaries are particularly susceptible to increased nutrient loading and eutrophication, as 75% of the population resides within 200 km of the coastline. We assessed the factors potentially limiting both biomass and production in one Australian estuary, Moreton Bay, through stoichiometric comparisons of nitrogen (N), phosphorus (P), silicon (Si), and carbon (C) concentrations, particulate compositions, and rates of uptake. Samples were collected over 3 seasons in 1997-1998 at stations located throughout the bay system, including one riverine endmember site. Concentrations of all dissolved nutrients, as well as particulate nutrients and chlorophyll, declined 10-fold to 100-fold from the impacted western embayments to the eastern, more oceanic-influenced regions of the bay during all seasons. For all seasons and all regions, both the dissolved nutrients and particulate biomass yielded N : P ratios < 6 and N : Si ratios < 1. Both relationships suggest strong limitation of biomass by N throughout the bay. Limitation of rates of nutrient uptake and productivity were more complex. Low C : N and C : P uptake ratios at the riverine site suggested light limitation at all seasons, low N : P ratios suggested some degree of N limitation and high N : Si uptake ratios in austral winter suggested Si limitation of uptake during that season only. No evidence of P limitation of biomass or productivity was evident.
Keyword Environmental Sciences
Marine & Freshwater Biology
Chesapeake Bay
Coastal Eutrophication
Surface Waters
Land-use
Nutrient
Availability
Temperature
Catchments
Responses
Patterns
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2007 Higher Education Research Data Collection
School of Biological Sciences Publications
 
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Created: Wed, 15 Aug 2007, 08:58:06 EST