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  Influence of environmental conditions on late-summer cyanobacterial abundance in Saginaw Bay, Lake Huron
 
 
Titel: Influence of environmental conditions on late-summer cyanobacterial abundance in Saginaw Bay, Lake Huron
Auteur: Millie, D. F.
Fahnenstiel, G. L.
Dyble, J.
Pigg, R.
Rediske, R.
Klarer, D. M.
Litaker, R. W.
Tester, P. A.
Verschenen in: Aquatic ecosystem health & management
Paginering: Jaargang 11 (2008) nr. 2 pagina's 196-205
Jaar: 2008-04
Inhoud: The relationships among environmental conditions and phytoplankton assemblages were characterized during late summer (2003-2005) in Saginaw Bay, Lake Huron. Differences among sampling stations, arising primarily from spatial disparities in water-column optical properties and nutrient availability, were evident. Cyanobacteria and diatoms dominated phytoplankton assemblages, with the greatest total chlorophyll a concentrations occurring at the innermost portions of the Bay. Microcystis abundance was greatest in the Bay's upper reaches and decreased with increasing distance from the mouth of the Saginaw River. A suite of variables, indicative of annually-distinct meteorological and hydrological conditions and phosphorus-laden inflows, were identified to (collectively) best 'group' stations in a manner consistent with that of phylogenetic-group chlorophyll a concentrations and cyanobacterial biovolumes. However, a great deal of variability between abiotic and biotic patterns remained unexplained and several abiotic variables singularly corresponded with Microcystis abundance. Taken together, it appears that multiple environmental conditions (including annual/episodic meteorological patterns, seasonal/intermittent riverine inflows, annual phosphorus loading, etc.) interact with taxon-specific physiological traits to holistically influence late-summer phytoplankton abundance throughout inner Saginaw Bay.
Uitgever: Taylor & Francis
Bronbestand: Elektronische Wetenschappelijke Tijdschriften
 
 

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