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Scientists report low pelagic chlorophyll, explore nutrient, microbialite and lab-method causes
Summary
Researchers reported lower-than-normal pelagic chlorophyll this winter and outlined hypotheses (nutrient dilution, microbialite recolonization and altered north-arm nutrient flux) along with an interlab plan to harmonize nutrient analyses.
Researchers from university and state labs reported unusually low pelagic phytoplankton (chlorophyll) this winter and outlined hypotheses and laboratory work to explain the pattern.
Gary (surname given in meeting) presented phytoplankton counts showing 2025 values below the long-term (1994–2023) averages and below last year’s values. He said the low chlorophyll is unlikely to be driven by temperature alone and suggested multiple hypotheses: dilution of nutrients due to increased lake volume, recolonization of exposed microbialite biofilms that…
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