Oxygen-based productivity and respiration rates were determined in West Florida coastal waters to evaluate the proportion of community respiration demands met by autotrophic production within a harmful algal bloom dominated by Karenia brevis. The field program was adaptive in that sampling during the 2006 bloom occurred where surveys by the Florida Wildlife Research Institute indicated locations with high cell abundances. Net community production (NCP) rates from light-dark bottle incubations during the bloom ranged from 10 to 42 μmole O₂ L⁻¹ day⁻¹ with highest rates in bloom waters where abundances exceeded 10⁵ cells L⁻¹. Community dark respiration (R) rates in dark bottles ranged from <10 to 70 μmole O₂ L⁻¹ day⁻¹ over 24 h. Gross primary production derived from the sum of NCP and R varied from ca. 20 to 120 μmole O₂ L⁻¹ day⁻¹. The proportion of GPP attributed to NCP varied with the magnitude of R during day and night periods. Most surface communities exhibited net autotrophic production (NCP > R) over 24 h, although heterotrophy (NCP < R) characterized the densest sample where K. brevis cell densities exceed 10⁶ cells L⁻¹.

在西佛罗里达州沿海水域确定了基于氧气的生产力和呼吸速率，以评估在以短藻为主的有害藻华中自养生产满足的群落呼吸需求的比例。实地计划是适应性的，因为在 2006 年盛开期间进行了采样，佛罗里达野生动物研究所的调查显示了细胞丰度高的位置。在盛开期间，来自明暗瓶孵化的净群落生产(NCP) 速率范围为10 到42 μmole O ₂  L ^-1 天^-1，其中丰度超过10 ^{5 个} 细胞L ^{-1 的}盛开水域中的速率最高。社区暗呼吸（R) 24 小时内在深色瓶中的比率范围从 <10 到 70 μmole O ₂  L ^-1 天^-1。来自 NCP 和R总和的初级生产总值从大约 20 至 120 微摩尔 O ₂  L ^-1 天^-1。归因于 NCP 的 GPP 比例随白天和夜间R的大小而变化。大多数表面群落在 24 小时内表现出净自养生产（NCP >  R），尽管异养（NCP <  R）表征了最密集的样本，其中K. brevis细胞密度超过 10 ⁶ 细胞 L ^-1。