| Yan Tian,Zhou Mingjiang,Qian Peiyuan. 2002. Notes Effects of four nitrogen substrates on growth of several red tide species. Acta Oceanologica Sinica, (3):461－467 |
| Notes Effects of four nitrogen substrates on growth of several red tide species |
| Notes Effects of four nitrogen substrates on growth of several red tide species |
| Received:January 22, 2002 Revised:February 20, 2002 |
| DOI： |
| Key words:Red tide nutrient N-substrate |
| 中文关键词: Red tide nutrient N-substrate |
| 基金项目:This study was supported by NSFC Project under contract Nos 39950001, 49906007, 20177023 and 40076030; Projects of No.2001CB409700 KZCX2-206, PREPP from the Government of the Hong Kong Special Administrative Region of the PRC and Science Committee of Shandong Province. |
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| Abstract: |
| Eight common red tide species including the Dinoflagellates Ale randrium tamarense,Prorocentrum minimum, Prorocentrum mican, Diatoms Skeletonema costatum, Cerataulina pelagica, Leptocylindrus minimus, a Raphidophyte Heterosigma akashiwo and a Chrysophyte Ivohrysis galbana were chosen to study the effect of four nitrogen substrates (NO3-N, NH4-N, Urea-N,Mixed-N) on the growth of these algae. After two transfers, the results showed that at N concentration of 550μmol, NO3-N was the best nitrogen source among these four nitrogen substrates; Urea-N and Mixed-N were also good for the growth of most algae, but not as good as NO3-N for some species; NH4-N inhibited the growth of all these species except H. akashiwo. At concentrations of 280 and 50 μmnol experiments on the growth of I. galbana, P. minimum and L. minimus in NH4-N and NO3-N substrates were also performed. The results showed that the growth rates of I. galbana were not significantly different from each other in NO3-N and NH4-N substrates both concentrations of 280 and 50 μmol. In concentration of 280μmol NH4-N substrate, the growth rates of P. minimum and L. minimus were slower than in same concentration of NO3-N; At concentration of 50μmol, the growth rate of P. minimum in NH4-N was not significantly different from that in NO3-N, while the growth rate of L. minimus was only about 30% of that in NO3-N substrate.The results indicated that each alga had its own preference in N-substrate and concentration, therefore,different nitrogen substrates may play a role in red tide formation. |
| 中文摘要: |
| Eight common red tide species including the Dinoflagellates Ale randrium tamarense,Prorocentrum minimum, Prorocentrum mican, Diatoms Skeletonema costatum, Cerataulina pelagica, Leptocylindrus minimus, a Raphidophyte Heterosigma akashiwo and a Chrysophyte Ivohrysis galbana were chosen to study the effect of four nitrogen substrates (NO3-N, NH4-N, Urea-N,Mixed-N) on the growth of these algae. After two transfers, the results showed that at N concentration of 550μmol, NO3-N was the best nitrogen source among these four nitrogen substrates; Urea-N and Mixed-N were also good for the growth of most algae, but not as good as NO3-N for some species; NH4-N inhibited the growth of all these species except H. akashiwo. At concentrations of 280 and 50 μmnol experiments on the growth of I. galbana, P. minimum and L. minimus in NH4-N and NO3-N substrates were also performed. The results showed that the growth rates of I. galbana were not significantly different from each other in NO3-N and NH4-N substrates both concentrations of 280 and 50 μmol. In concentration of 280μmol NH4-N substrate, the growth rates of P. minimum and L. minimus were slower than in same concentration of NO3-N; At concentration of 50μmol, the growth rate of P. minimum in NH4-N was not significantly different from that in NO3-N, while the growth rate of L. minimus was only about 30% of that in NO3-N substrate.The results indicated that each alga had its own preference in N-substrate and concentration, therefore,different nitrogen substrates may play a role in red tide formation. |
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