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首页> 外文期刊>Limnology and oceanography, methods >An autonomous, in situ light-dark bottle device for determining community respiration and net community production
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An autonomous, in situ light-dark bottle device for determining community respiration and net community production

机译：一种自主，原位光暗瓶装置，用于确定社区呼吸和净社区生产

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We describe a new, autonomous, incubation-based instrument that is deployed in situ to determine rates of gross community respiration and net community production in marine and aquatic ecosystems. During deployments at a coastal pier and in the open ocean, the PHORCYS (PHOtosynthesis and Respiration Comparison-Yielding System) captured dissolved oxygen fluxes over hourly timescales that were missed by traditional methods. The instrument uses fluorescence-quenching optodes fitted into separate light and dark chambers; these are opened and closed with piston-like actuators, allowing the instrument to make multiple, independent rate estimates in the course of each deployment. Consistent with other studies in which methods purporting to measure the same metabolic processes have yielded divergent results, respiration rate estimates from the PHORCYS were systematically higher than those calculated for the same waters using a traditional two-point Winkler titration technique. However, PHORCYS estimates of gross respiration agreed generally with separate incubations in bottles fitted with optode sensor spots. An Appendix describes a new method for estimating uncertainties in metabolic rates calculated from continuous dissolved oxygen data. Multiple successful, unattended deployments of the PHORCYS represent a small step toward fully autonomous observations of community metabolism. Yet the persistence of unexplained disagreements among aquatic metabolic rate estimates—such as those we observed between rates calculated with the PHORCYS and two existing, widely accepted bottle-based methods—suggests that a new community intercalibration effort is warranted to address lingering sources of error in these critical measurements.
机译：我们描述了一种新的，自主，潜伏的仪器，该仪器原位部署，以确定海洋和水生生态系统中的社区呼吸和净社区生产的率。在沿海码头和开阔的海洋部署期间，Phorcys（光合作用和呼吸比较 - 屈服系统）捕获了由传统方法错过的每小时时间抑制氧气通量。该仪器采用荧光淬火光电设计成单独的光和暗腔室;这些致动器打开并关闭，允许仪器在每个部署过程中进行多重，独立的速率估算。与其他研究一致，其中声称测量相同代谢过程的方法产生了发散的结果，从使用传统的两点旋转滴定技术系统地高于对相同水计算的那些计算的呼吸速率估计。然而，Phorcys估计总呼吸的估计通常在配有光电传感器斑点的瓶子中单独孵育。附录描述了一种用于估计由连续溶解的氧数据计算的代谢率的不确定性的新方法。多重成功的，无人看管的堤防部署代表了对社区新陈代谢的完全自主观察的一小步。然而，水生代谢率估算中未解释的分歧的持续存在 - 例如我们观察到使用电影电影和两个现有的瓶子的速率之间观察到的那些，这表明了新的社区互际努力，以解决挥之不去的错误来源这些临界测量。

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