清洁疏浚物对2种海洋微藻种间竞争的影响

doi:10.3969/j.issn.1001-909X.2016.01.007

海洋学研究 ›› 2016, Vol. 34 ›› Issue (1): 52-60.DOI: 10.3969/j.issn.1001-909X.2016.01.007

清洁疏浚物对2种海洋微藻种间竞争的影响

董鹏¹, 费岳军¹, 何东海¹, 张海波^*1, 徐韧^2,3

1.国家海洋局宁波海洋环境监测中心站,浙江宁波 315040;
2.国家海洋局东海环境监测中心,上海 201206;
3.国家海洋局赤潮灾害立体监测技术与应用重点实验室,上海 200090

收稿日期:2015-04-22 修回日期:2015-10-19 出版日期:2016-03-15 发布日期:2022-11-24
通讯作者: * 张海波(1978-),男,高级工程师,主要从事海洋生态环境监测与评价方面的研究。E-mail:zhanghb@eastsea.gov.cn
作者简介:董鹏(1988-),男,江苏徐州市人,助理工程师,主要从事海洋生态环境监测与评价方面的研究。E-mail:dongpeng@eastsea.gov.cn
基金资助:
2012年中央分成海域使用金支出项目资助(环保类,国海办字(2013)551号);农业部东海与远洋渔业资源开发利用重点实验室项目资助(2013K05);2013年国家海洋局东海分局青年科技基金项目资助(201324)

Effects of cleaning dredged materials on the interspecific competition between two species of microalgae

DONG Peng¹, FEI Yue-jun¹, HE Dong-hai¹, ZHANG Hai-bo^*1, XU Ren^2,3

1. Marine Environmental Monitoring Center of Ningbo, SOA, Ningbo 315040, China;
2. East China Sea Environmental Monitoring Center, SOA, Shanghai 201206, China;
3. Key Laboratory of Integrated Monitoring and Applied Technology for Marine Harmful Algal Blooms, SOA, Shanghai 200090, China

Received:2015-04-22 Revised:2015-10-19 Online:2016-03-15 Published:2022-11-24

摘要/Abstract

摘要： 采用实验生态学方法,研究了不同起始密度下悬浮清洁疏浚物对中肋骨条藻Skeletonema costatum和赤潮异弯藻Heterosigma akashiwo生长的影响。研究结果表明,在实验室单培养条件下,清洁疏浚物培养液中,起始密度不同,微藻生长状况明显不同。起始密度为0.2×10⁴ cells·mL^-1时,进入指数生长期和静止期的时间延长,但生长所达到的最大细胞密度较高;起始密度为0.8×10⁴ cells·mL^-1时,进入指数生长期和静止期的时间缩短,但生长所达到的种群最大密度较低。混合培养条件下,清洁疏浚物培养液中,起始密度不同,导致了微藻种间竞争关系的变化,中肋骨条藻与赤潮异弯藻具有明显的种间竞争,赤潮异弯藻是竞争的优胜者,中肋骨条藻受到赤潮异弯藻的抑制,整个实验周期内细胞密度下降都非常明显,细胞密度明显低于单培养时的细胞密度,而赤潮异弯藻细胞密度并没有明显的减少。在3种不同质量浓度组清洁疏浚物培养液中,质量浓度最高的1 000 mg·L^-1培养液中藻细胞密度显著低于100 和500 mg·L^-1质量浓度组,而100 mg·L^-1培养液中藻细胞密度最高,说明清洁疏浚物质量浓度越高,对海洋微藻抑制影响越为明显,质量浓度越低,影响越小。

关键词: 清洁疏浚物, 种间竞争, 起始密度, 中肋骨条藻, 赤潮异弯藻

Abstract: The effects of cleaning dredged materials on the growth of two marine microalgae species with different initial cell density:Skeletonema costatum and Heterosigma akashiwo, were investigated by using the measures of experimental ecology. The results show that at the unialgal culture medium of cleaning dredged materials in laboratory, the different initial cell density has apparent effects on the growth of microalgae. At the initial cell density of 0.2×10⁴ cells·mL^-1, the time of entering exponential phase and stationary phase can be extended, and reaching the maximum cell density is higher; at the initial cell density of 0.8×10⁴ cells·mL^-1, the time of entering exponential phase and stationary phase could be shortened, and reaching the maximum cell density is reduced. For the mixed cleaning dredged materials culture medium, the different initial cell density has apparent effects on the relation of interspecific competition between two species of microalgae. There is obvious interspecific competition between S. costatum and H. akashiwo. H. akashiwo has predominance in this competition, and S. costatum suffers from H. Akashiwo inhibition, within the entire experimental period, cell density reduces very significantly and is lower than that in the unialgal culture, while H. akashiwo cell density is not significantly reduced. Among these three different medium concentrations of cleaning dredged materials, the cell density in the highest culture medium concentrations of 1 000 mg·L^-1is significantly lower than those in 100 mg·L^-1and 500 mg·L^-1 culture medium, and the cell density is the highest in 100 mg·L^-1 culture medium. This indicates that the greater of clean dredged materials concentrations, the greater effects on the growth of microalgae, while the lower of clean dredged materials concentrations, the smaller effects on the growth of microalgae.

Key words: cleaning dredged materials, interspecific competition, initial cell density, Skeletonema costatum, Heterosigma akashiwo

中图分类号:

Q948.8

董鹏, 费岳军, 何东海, 张海波, 徐韧. 清洁疏浚物对2种海洋微藻种间竞争的影响[J]. 海洋学研究, 2016, 34(1): 52-60.

DONG Peng, FEI Yue-jun, HE Dong-hai, ZHANG Hai-bo, XU Ren. Effects of cleaning dredged materials on the interspecific competition between two species of microalgae[J]. Journal of Marine Sciences, 2016, 34(1): 52-60.

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清洁疏浚物对2种海洋微藻种间竞争的影响

Effects of cleaning dredged materials on the interspecific competition between two species of microalgae

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