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Scientists report unusual nutrient and chlorophyll patterns, link to berm and lab-method shifts
Summary
USGS and university scientists described an atypical January–February chlorophyll dip, presented nutrient mass-balance draft pointing to the north arm as the major nutrient source, and flagged a lab-method change: the national lab will not analyze hypersaline nutrient samples, prompting a switch to Chesapeake Biological Labs and a planned side-by-side comparison.
Scientists at the meeting detailed an unexplained decline in chlorophyll in January–February and discussed hypotheses about nutrient inputs, export and microbial dynamics that may be reshaping Great Salt Lake’s pelagic food web.
Christine (USGS partnership) and Gary Golowski (laboratory presenter) summarized monitoring and lab work underpinning the discussion. Christine said the USGS nutrient mass-balance draft identifies the north arm as the largest source of phosphorus and nitrogen into the lake and highlighted ongoing discrete inflow and salinity measurements. "Our most recent measurement was around 30 CFS," she said when describing low uncertainty flows near detection limits…
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