Figure 4.

Time series of primary productivity (A), vitamin B₁₂ (B), and B₁ (C) uptake dynamics in Old Fort Pond (left) and Long Island Sound (right), NY. Size fractionated primary production and uptake measurements were obtained via the use of polycarbonate filters and are reported in mg C m⁻³ day⁻¹ and pmol L⁻¹ day⁻¹, respectively.