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Comparative assessment of two agriculturally-influenced estuaries

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dc.contributor.author Lemley, DA
dc.contributor.author Adams, JB
dc.contributor.author Taljaard, Susan
dc.date.accessioned 2017-07-28T09:37:38Z
dc.date.available 2017-07-28T09:37:38Z
dc.date.issued 2017-04
dc.identifier.citation Lemley, D.A, Adams, J.B. and Taljaard, S. 2017. Comparative assessment of two agriculturally-influenced estuaries: similar pressure, different response. Marine pollution bulletin, 117(1-2), pp136-147 en_US
dc.identifier.issn 0025-326X
dc.identifier.uri http://www.sciencedirect.com/science/article/pii/S0025326X17300887
dc.identifier.uri http://hdl.handle.net/10204/9415
dc.description Copyright: 2017 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in Marine Pollution Bulletin, 117(1-2), pp136-147 en_US
dc.description.abstract This study compared the spatio-temporal dynamics in two agriculturally-influenced South African estuaries - Gamtoos and Sundays - to investigate how contrasting hydrological alterations influence physical, chemical and biological responses. With the Gamtoos Estuary experiencing regular high flow conditions, a key difference between the two systems is the propensity for natural flushing events to occur; a mechanism largely eliminated from the highly-regulated Sundays Catchment. Phytoplankton blooms (>20Chl-aµgl-1) were persistent and seasonal in the Sundays, inducing summer bottom-water hypoxia (<2mgl-1), whilst those in the Gamtoos were episodic and flow-dependent. Of concern in the Sundays Estuary, was the magnitude (>550µgl-1) and recurrent nature of two harmful algal bloom (HAB) species. This study provides the first account of HAB persistence and seasonal hypoxia in a South African estuary, demonstrating the possible consequences of shifting an ecosystem into a new stable state en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Workflow;18740
dc.subject Ecohydrodynamics en_US
dc.subject Eutrophication en_US
dc.subject Heterocapsa rotundata en_US
dc.subject Heterosigma akashiwo en_US
dc.subject Hypoxia en_US
dc.subject Phytoplankton en_US
dc.title Comparative assessment of two agriculturally-influenced estuaries en_US
dc.title.alternative Similar pressure, different response en_US
dc.type Article en_US
dc.identifier.apacitation Lemley, D., Adams, J., & Taljaard, S. (2017). Comparative assessment of two agriculturally-influenced estuaries. http://hdl.handle.net/10204/9415 en_ZA
dc.identifier.chicagocitation Lemley, DA, JB Adams, and Susan Taljaard "Comparative assessment of two agriculturally-influenced estuaries." (2017) http://hdl.handle.net/10204/9415 en_ZA
dc.identifier.vancouvercitation Lemley D, Adams J, Taljaard S. Comparative assessment of two agriculturally-influenced estuaries. 2017; http://hdl.handle.net/10204/9415. en_ZA
dc.identifier.ris TY - Article AU - Lemley, DA AU - Adams, JB AU - Taljaard, Susan AB - This study compared the spatio-temporal dynamics in two agriculturally-influenced South African estuaries - Gamtoos and Sundays - to investigate how contrasting hydrological alterations influence physical, chemical and biological responses. With the Gamtoos Estuary experiencing regular high flow conditions, a key difference between the two systems is the propensity for natural flushing events to occur; a mechanism largely eliminated from the highly-regulated Sundays Catchment. Phytoplankton blooms (>20Chl-aµgl-1) were persistent and seasonal in the Sundays, inducing summer bottom-water hypoxia (<2mgl-1), whilst those in the Gamtoos were episodic and flow-dependent. Of concern in the Sundays Estuary, was the magnitude (>550µgl-1) and recurrent nature of two harmful algal bloom (HAB) species. This study provides the first account of HAB persistence and seasonal hypoxia in a South African estuary, demonstrating the possible consequences of shifting an ecosystem into a new stable state DA - 2017-04 DB - ResearchSpace DP - CSIR KW - Ecohydrodynamics KW - Eutrophication KW - Heterocapsa rotundata KW - Heterosigma akashiwo KW - Hypoxia KW - Phytoplankton LK - https://researchspace.csir.co.za PY - 2017 SM - 0025-326X T1 - Comparative assessment of two agriculturally-influenced estuaries TI - Comparative assessment of two agriculturally-influenced estuaries T2 - Similar pressure, different response UR - http://hdl.handle.net/10204/9415 ER - en_ZA


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