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| 铜藻金潮对浒苔绿潮和几种赤潮原因种生长影响的模拟研究 |
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蔡佳宸1,2, 耿慧霞1,3,4, 孔凡洲1,3,4, 张清春1,3,4, 张波1, 颜天1,3,4
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1.中国科学院海洋生态与环境科学重点实验室 中国科学院海洋研究所 青岛 266071;2.中国科学院大学 北京 100049;3.青岛海洋科学与技术试点国家实验室 海洋生态与环境科学功能实验室 青岛 266237;4.中国科学院海洋大科学研究中心 青岛 266071
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| 摘要: |
| 通过室内模拟实验研究了金潮原因种铜藻（Sargassum horneri）的腐烂液和培养液对绿潮原因种浒苔（Ulva prolifera）微观繁殖体萌发和幼苗生长以及五种赤潮原因种——中肋骨条藻（Skeletonema costatum）、链状亚历山大藻（Alexandrium catenella）、东海原甲藻（Prorocentrum donghaiense）、米氏凯伦藻（Karenia mikimotoi）和赤潮异弯藻（Heterosigma akashiwo）生长的影响。研究发现：低浓度铜藻腐烂液（10g/L）对浒苔微观繁殖体萌发和幼苗的生长以及五种赤潮微藻的生长影响效应不显著；中等浓度铜藻腐烂液（20g/L）对浒苔微观繁殖体萌发具有抑制作用，抑制率13.3%，而对浒苔幼苗有一定的促生作用，对米氏凯伦藻的生长抑制率在第12d能达到90.4%，对其他四种赤潮微藻的抑制作用并不显著；高浓度铜藻腐烂液（40g/L）对浒苔微观繁殖体萌发的抑制率为45.8%，对浒苔幼苗的生长具有抑制作用，对米氏凯伦藻具有致死效应，对东海原甲藻的抑制率在第12d为65.9%，对其他三种赤潮微藻的生长均有抑制作用，但并不显著，其中赤潮异弯藻受到的抑制作用最小。低浓度铜藻培养液（5g/L）对浒苔微观繁殖体萌发的抑制率为22.8%，对浒苔幼苗的生长表现出一定的促进作用，对米氏凯伦藻生长的抑制率在第12d能够达到40.5%，对其他四种赤潮微藻生长的抑制作用不显著；而高浓度铜藻培养液（10g/L）对浒苔微观繁殖体萌发的抑制率为29.6%，对浒苔幼苗生长的抑制率为22.2%，对米氏凯伦藻生长的抑制率在第12d为92.9%，对其他四种赤潮微藻生长均有一定的抑制作用，但不显著，且赤潮异弯藻受到抑制作用最小。可见，铜藻腐烂液和培养液均会对浒苔微观繁殖体萌发和幼苗生长以及五种赤潮微藻的生长造成影响，且影响程度与浓度相关，五种赤潮微藻生长受到的影响与藻种有关。以上结果表明，金潮原因种对绿潮和赤潮原因种的生长有一定的影响，金潮的暴发和衰亡过程也会对绿潮和赤潮的发生产生一定的影响。 |
| 关键词: 金潮 绿潮 赤潮 腐烂液 培养液 影响 |
| DOI：10.11693/hyhz20190100028 |
| 分类号:Q14 |
| 基金项目:山东省重大科技创新工程专项“健康海洋”技术创新工程，2018SDKJ0504-4号；青岛海洋科学与技术国家实验室鳌山科技创新计划项目，2016ASKJ02号；中国科学院A类战略性先导科技专项，XDA23050302号。 |
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| SIMULATION STUDY ON THE EFFECT OF SARGASSUM HORNERI ON OTHER HARMFUL BLOOM CAUSATIVE SPECIES |
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CAI Jia-Chen1,2, GENG Hui-Xia1,3,4, KONG Fan-Zhou1,3,4, ZHANG Qing-Chun1,3,4, ZHANG Bo1, YAN Tian1,3,4
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1.CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.Laboratory for Marine Ecology and Environmental Science, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China;4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
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| Abstract: |
| To study the effects of golden-tide causative Sargassum horneri against several harmful-algal-bloom-causative microalgae species, culture medium of S. horneri ("the medium" hereinafter) and liquid of decomposed S. horneri ("the liquid" hereinafter) were tested in laboratory simulation to see the impacts on the gamete germination (GG) and seedling growth (SG) of common green-tide causative Ulva prolifera and the growth of five red-tide causative microalgae (G5A) (Skeletonema costatum, Alexandrium catenella, Prorocentrum donghaiense, Karenia mikimotoi, and Heterosigma akashiwo). Simulations of the impacts of the medium were conducted in concentration of 10, 20, and 40g/L, and that of the liquid in 5 and 10g/L; the durations were 24h, 15d, and 12d for GG, SG, and G5A, respectively; all the tests were aerobic in 20℃ and darkness. The results reveal that the effect of the liquid in 10g/L was not significant, while in 20g/L, it inhibited the GG by 13.3%. On Day 12, the liquid inhibited K. mikimotoi growth by 90.4%; however, it promoted the SG but the G5A. The liquid in 40g/L strongly inhibited GG by 45.8%, and lethal to K. mikimotoi. On Day 12, the liquid inhibited P. donghaiense growth by 65.9%, while did not so on other red-tide microalgae growth, of which the effect on H. akashiwo was the minimum. On the other hand, the medium in 5g/L inhibited GG by 22.8%, but promoted SG. On Day 12, except that the inhibition rate of K. mikimotoi was 40.5%, the effect on other G5A was not significant. The medium in 10 g/L showed an inhibition effect on GG by 29.6%, on SG by 22.2%, and on K. mikimotoi by 92.9% on Day 12, while it was not significant on other G5A, and the least inhibited on H. akashiwo. Therefore, both the liquid and the medium could affect the GG and SG, and G5A. The degree of impact was related to the algal concentration and was species-specific. This study indicates that a golden-tide species could affect a green or red tide species. The outbreak and decline of a golden tide may influence the occurrence of green tide or red tide. |
| Key words: golden tide green tide red tide decomposition liquid culture medium effect |
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