Carbon isotope ratio and photosynthetic activity of phytoplankton in the eutrophic Mikawa Bay, Japan
Carbon isotope ratio and photosynthetic activity of phytoplankton in the eutrophic Mikawa Bay, Japan
复制标题
日本富营养化三河湾浮游植物的碳同位素比和光合活性
DOI：
10.1007/bf02347102
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发表时间：
1992
影响因子：
2
通讯作者：
M. Sakamoto
中科院分区：
文献类型：
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作者：
Kazushi Takahashi;E. Wada;M. Sakamoto
通过对日本三川湾富营养化海域不同粒径的微型浮游生物（<10 μm）和净浮游生物（>10 μm）样品的天然碳同位素比值（δ 13 C）和短期碳吸收速率（13 C示踪研究）的同步测量，研究了该海域浮游植物的初级生产力。短期光合速率，代表藻类的生理状态，是可变的，无论常备股票大小。6月和7月的颗粒有机碳（POC）δ 13 C值显示出净浮游生物（−19.8 ‰ ~ −12.7‰）和微型浮游生物（−22.0 ‰ ~ −12.8‰）的水平变化。对于这两种组分，低浓度的POC具有更负的δ 13 C值（−22至−18‰）。当POC浓度较高时，由于赤潮的发生，净浮游生物的δ 13 C值较高。这表明，藻类现存量的净浮游生物部分的增加是由于光合作用活动的加速。而具有较高POC值的微型浮游生物组分具有相对较低的δ 13 C值。
Primary production by phytoplankton in the eutrophic Mikawa Bay, Japan, was studied by simultaneous measurements of natural carbon isotope ratio (δ13C) and short-term carbon uptake rates (13C tracer study) of size-fractionated nannoplankton (<10 μm) and net plankton (>10 μm) samples. Short-term photosynthetic rates, which represent the physiological state of algae, were variable regardless of standing stock sizes. Theδ13C values of particulate organic carbon (POC) in June and July displayed horizontal variations for both the net plankton fraction (−19.8 to −12.7‰) and the nannoplankton fraction (−22.0 to −12.8‰). For both fractions, low concentrations of POC had more negativeδ13C values (−22 to −18‰). Highδ13C values for the net plankton were found when POC concentrations were much higher, due to red tide. This suggests that the increase in algal standing crop for the net plankton fraction resulted from accelerated photosynthetic activity. However the nannoplankton fractions with higher POC values have relatively lowδ13C values.
影响因子：
0.5
作者：
T. Nakatsuka;N. Handa;E. Wada;C. Wong
通讯作者：
T. Nakatsuka;N. Handa;E. Wada;C. Wong
DOI：
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发表时间：
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