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COMPARISON OF NUTRIENT AND LIGHT LIMITATION IN THREE GULF OF MEXICO ESTUARIES

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Date Issued:
2013
Summary:
This study was conducted in three contrasting northeastern Gulf of Mexico estuaries. Bimonthly sampling from January 2011 to November 2011 along with historic data from the National Estuarine Research Reserve System Wide Monitoring Program were used to assess light versus nutrient limitation. The data were applied to the Cloern (1999) model to identify the relative importance of light and nutrients in limiting phytoplankton growth. Nutrient enrichment bioassay experiments were conducted for each of the three systems 5 to 6 times to identify nitrogen and phosphorous limitation of algal growth. Despite different physico-chemical characteristics, the three systems were largely limited by nutrients rather than light with seasonal and episodic exceptions. Nutrient enrichment of coastal ecosystems is a trend of concern due to the detrimental effects associated with this phenomenon. Increased algal biomass, increased frequency of harmful algal blooms, fish and invertebrate mortalities, and quantitative and qualitative habitat loss have all been documented manifestations of this process. While most coastlines are receiving increased nutrient loads, the ecosystem level responses are variable. In order to regulate watershed land use and acceptable nutrient loads, resource managers must be able to predict a system's response to potential changes in input.
Title: COMPARISON OF NUTRIENT AND LIGHT LIMITATION IN THREE GULF OF MEXICO ESTUARIES.
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Name(s): Amacker, Kendra Straub, Author
Type of Resource: text
Date Issued: 2013
Publisher: University of West Florida
Language(s): English
Summary: This study was conducted in three contrasting northeastern Gulf of Mexico estuaries. Bimonthly sampling from January 2011 to November 2011 along with historic data from the National Estuarine Research Reserve System Wide Monitoring Program were used to assess light versus nutrient limitation. The data were applied to the Cloern (1999) model to identify the relative importance of light and nutrients in limiting phytoplankton growth. Nutrient enrichment bioassay experiments were conducted for each of the three systems 5 to 6 times to identify nitrogen and phosphorous limitation of algal growth. Despite different physico-chemical characteristics, the three systems were largely limited by nutrients rather than light with seasonal and episodic exceptions. Nutrient enrichment of coastal ecosystems is a trend of concern due to the detrimental effects associated with this phenomenon. Increased algal biomass, increased frequency of harmful algal blooms, fish and invertebrate mortalities, and quantitative and qualitative habitat loss have all been documented manifestations of this process. While most coastlines are receiving increased nutrient loads, the ecosystem level responses are variable. In order to regulate watershed land use and acceptable nutrient loads, resource managers must be able to predict a system's response to potential changes in input.
Identifier: WFE0000394 (IID), uwf:61060 (fedora)
Note(s): 2013-06-01
M.S.
Department of Biology
Masters
Persistent Link to This Record: http://purl.flvc.org/uwf/fd/WFE0000394
Restrictions on Access: public
Use and Reproduction: http://rightsstatements.org/vocab/InC-EDU/1.0/
Host Institution: UWF

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