Spring phytoplankton photosynthesis, growth, and primary production and relationships to a recurrent coastal sediment plume and river inputs in southeastern Lake Michigan

摘要: event. Consistently higher values of the light-saturated rate photosynthesis, Pmax , were observed in spring 1998 compared to 1999 and 2000. Higher appeared be related increased availability phosphorus, as evidenced by significant correlations with soluble reactive phosphorus (SRP). Light-saturated growth rates also significantly correlated SRP concentrations. These findings consistent view that RCP was a source enrichment. However, incubation experiments involving lake water enriched sediments showed relatively small increases photosynthetic parameters, while enrichments river exhibited elevated rates. This result, along levels discharge high dissolved water, supported riverine inputs rather than responsible for parameters seen coastal margin assemblages. Despite 1998, model analyses revealed reduced light resulting from intense event constrained phytoplankton primary production during this season apparently suppressed development typical bloom. indicate potential ecosystem productivity response extreme storm events, frequency which may increase projected long-term climate changes. INDEX TERMS: 4855 Oceanography: Biological Chemical: Plankton; 4845 Nutrients nutrient cycling; 4552 Physical: Ocean optics; 9345 Information Related Geographic Region: Large bodies (e.g., lakes inland seas); KEYWORDS: Lake Michigan, phytoplankton, production, Michigan processes