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首页> 外文期刊>Estuarine Coastal and Shelf Science >Assessment of carbon- and fluorescence-based primary productivity in Ariake Bay, southwestern Japan
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Assessment of carbon- and fluorescence-based primary productivity in Ariake Bay, southwestern Japan

机译：日本西南有明湾基于碳和荧光的初级生产力评估

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摘要

A comparative account of primary productivity (PP), in the characteristically turbid and highly dynamic waters of Ariake Bay, measured by ~(13)C uptake and fast repetition rate fluorometer (FRRF) was conducted to ensure compatibility between the two methods. Estimates from both methods depicted strong linearity for both short-term (r~2 > 0.90) and daily (r~2 = 0.42-0.93) measurements, except in the near-surface (～0 m) layer. ~(13)C-based short-term (1 h; in situ) PP estimates showed similar magnitudes and trend with the instantaneous PP measured by FRRF concurrently. Whereas, unlike short-term measurements, the daily PP estimates from both methods showed large difference, with FRRF-based time integrated daily PP resulting in 1.09-1.82 times higher than the carbon-based daily (24 h; simulated in situ) PP. This difference between daily PP estimates was mainly due to: (1) the temporal variation of water column chlorophyll a (Chl a) because of frequent moving of water mass, and (2) the dissimilarity in ambient light field conditions between the two methods. Results revealed that considering the above two environmental factors invariable over a daylength, fairly close approximation of daily PP, compared to ~(13)C-based daily PP, could be obtained from FRRF. Hence, FRRF-based daily PP can be considered as more realistic in this highly dynamic water body like Ariake Bay where water column parameters are subjected to strong temporal variation. The relationship between Chl a-specific photosynthetic rate (P~B) and the corresponding photosynthetically active radiation (PAR) in the water column (PAR-P~B relationship) was found to be linear for FRRF and curvilinear for~(13)C-based measurements in the near-surface layer, for the same intensities of incident PAR, and this is thought to be the primary basis for the higher difference in PP estimates at the near-surface layer. Considering the minor variations in FRRF-based time series of PAR-P~Brnrelationships, a combined and/or instantaneous PAR-P~B relationship in combination with incubation Chl a and light field condition was used to obtain fairly close estimates of daily water column integrated PP from FRRF.
机译：为了确保这两种方法之间的兼容性，在〜（13）C吸收和快速重复速率荧光计（FRRF）的测量下，对有明湾典型浑浊和高动态水域的初级生产力（PP）进行了比较。两种方法的估计值都表明，短期测量（r〜2> 0.90）和日常测量（r〜2 = 0.42-0.93）都具有很强的线性关系，除了近地表层（〜0 m）以外。 〜（13）C为基础的短期（1 h;原位）PP估计值与FRRF同时测量的瞬时PP相似，显示出相似的幅度和趋势。与短期测量不同，两种方法的每日PP估计值显示出很大的差异，基于FRRF的时间积分的每日PP的结果比基于碳的每日（24 h；原位模拟）PP高1.09-1.82倍。每天的PP估算值之间的差异主要是由于：（1）水柱频繁移动导致水柱叶绿素a（Chl a）随时间变化，以及（2）两种方法在环境光场条件下的差异。结果表明，考虑到上述两个环境因素在一整天中不变，可以从FRRF中获得与基于〜（13）C的日常PP相当接近的日常PP。因此，在这种高度动态的水域（如有明湾）中，基于FRRF的每日PP可以被认为是更现实的，其中水柱参数会受到强烈的时间变化。发现Chla的光合速率（P〜B）与水柱中相应的光合有效辐射（PAR）之间的关系（PAR-P〜B关系）对于FRRF是线性的，对于〜（13）C是曲线的入射光强度相同的情况下，在近地表层中进行基于测量的测量，这被认为是在近地表层中PP估计值较高差异的主要基础。考虑到基于FRRF的PAR-P〜B关系的时间序列中的微小变化，结合结合和/或瞬时PAR-P〜B关系以及孵化Chla和光场条件，获得了每日水柱的相当接近的估计值FRRF集成的PP。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2010年第1期|163-173|共11页
  • 作者

    S.C. Tripathy; J. Ishizaka; T. Fujiki; T. Shibata; K. Okamura; T. Hosaka; T. Saino;

  • 作者单位

    Hydrospheric Atmospheric Research Center, Nagoya University, Nagoya 4648601, Japan;

    rnHydrospheric Atmospheric Research Center, Nagoya University, Nagoya 4648601, Japan;

    Mutsu Institute of Oceanography, JAMSTEC, Mutsu, Aomori 0350022, Japan;

    rnHydrospheric Atmospheric Research Center, Nagoya University, Nagoya 4648601, Japan;

    Seikai National Fisheries Research Institute, Taira 1551-8, Nagasaki 8512213, Japan;

    rnHydrospheric Atmospheric Research Center, Nagoya University, Nagoya 4648601, Japan Tokyo University of Marine Science and Technology, Tokyo 1088477, Japan;

    Japan Agency for Marine-Earth Science and Technology, Yokosuka 2370061, Japan Japan Science and Technology Agency, Tokyo 1940004, Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    primary productivity; carbon-based incubation; FRR fluorometer; environmental factors; PAR-P~B relation; Ariake Bay;

    机译：初级生产力;碳基孵化;FRR荧光计;环境因素;PAR-P〜B关系;有明湾;

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