کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9482701 | 1327513 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical characteristics of the harmful dinoflagellate Alexandrium tamarense in response to different nitrogen sources
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
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چکیده انگلیسی
The chlorophyll a specific absorption coefficient aphâ and absorption ratio (aph ratio) of Alexandrium tamarense at five concentrations of nitrate, ammonium and urea over a range from 6 to 100 μM were examined. The experimental results were compared to two coastal diatom species and a prymnesiophyte to identify differences in absorption ratios. Cells exposed to increasing nitrate concentrations were characterized by an increase in aphâ at 443, 490, 510, 555 and 675 nm. However, ammonium and urea induced low aphâ values at their lowest and highest concentrations. The aph relative to 510 or 555 nm was constant regardless of the concentration of the N source, but dependent on the N source. Oxidized N induced a lower aph ratio than the reduced form. Comparisons of the aph ratio among taxonomic groups revealed significant differences. The aph ratio of A. tamarense was 20-30 and >50% lower than those of two diatoms and a prymnesiophyte, respectively. The aph ratio of the present study could assist in increasing the capability for detecting harmful species such as A. tamarense.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Harmful Algae - Volume 4, Issue 2, February 2005, Pages 211-219
Journal: Harmful Algae - Volume 4, Issue 2, February 2005, Pages 211-219
نویسندگان
Sandric Chee Yew Leong, Satoru Taguchi,