Riverine input of bioavailable iron supporting phytoplankton growth in Kesennuma Bay (Japan)
Riverine input of bioavailable iron supporting phytoplankton growth in Kesennuma Bay (Japan)
复制标题
河流输入的生物可利用铁支持气仙沼湾（日本）浮游植物的生长
DOI：
10.1016/s0043-1354(98)00113-4
复制
发表时间：
1998
期刊：
影响因子：
12.8
通讯作者：
Yoshihiro Suzuki
中科院分区：
文献类型：
--
作者：
K. Matsunaga;J. Nishioka;K. Kuma;Kenji Toya;Yoshihiro Suzuki
研究了河流铁和养分输入对气仙沼湾浮游植物生长的影响。通过沿海海洋硅藻角毛藻的富铁和限制培养实验，研究了铁和黄腐酸铁复合物的添加对浮游植物生长的影响。 （海湾内外的优势物种）使用海湾和外水域制备的培养基。海湾水不限铁。在月桂水中或高压灭菌的月桂水中添加 Fe(III) 并没有增加细胞产量。然而，当海湾水在紫外线照射后进行高压灭菌时，几乎没有生长。这表明紫外线照射破坏了影响铁生物利用度的有机化合物。外部水体中铁含量有限。向外部水中添加Fe(III)增加了细胞产量，并且添加黄腐酸-Fe后通过高压灭菌制备的富铁外部水也增加了细胞产量。添加Fe(III)后的外水高压灭菌时，几乎没有生长。这表明黄腐酸使铁具有生物可利用性。河流输入的有机结合铁（例如黄腐酸铁）和营养物质可能在支持海湾浮游植物生长方面发挥着重要作用。
The effects of riverain iron and nutrient inputs on phytoplankton growth in Kesennuma Bay were studied. The effects of iron and fulvic acid-iron complex additions on phytoplankton growth were studied in iron-enriched and -limited culture experiments of coastal marine diatom Chaetoceros sp. (the dominant species inside and outside of the bay) using media prepared from bay and outer waters. Bay water is not iron-limited. The addition of Fe(III) to bay water or autoclaved bay water gave no increase in cell yield. However, when bay water was autoclaved after UV-irradiation, there was little growth. This suggests that the UV irradiation destroyed organic compounds that affected iron bioavailability. Outer water is iron-limited. The addition of Fe(III) to outer water increased cell yield and iron-enriched outer water prepared by autoclaving after adding fulvic acid-Fe increased also cell yield. When outer water after adding Fe(III) was autoclaved, there was little growth. This suggests that fulvic acid made the iron bioavailable. The riverain inputs of organically bound iron, such as fulvic acid-Fe, and nutrients probably play an important role for supporting phytoplankton growth in the bay.