摘要
本文选取抑食金球藻(Aureococcus anophagefferens)、中肋骨条藻(Skeletonema costatum)和海洋卡盾藻(Chattonella marina)三种藻在20℃和25℃下进行单种、两种或三种藻间的培养实验,探究在不同温度下藻种间的相互作用和竞争优势。单种培养结果显示抑食金球藻和中肋骨条藻对温度25℃敏感,其环境容量(K)被显著降低;而海洋卡盾藻的内禀增长率(r)在25℃下显著升高,但K保持不变。在共培养中,海洋卡盾藻在20℃下因抑食金球藻添加致死,但在25℃处理下其K值上升120%。虽然中肋骨条藻的r在两个温度下均受海洋卡盾藻添加的促进,但其K值从20℃下的上升43%转变为25℃下的降低48%。温度变化对于抑食金球藻和中肋骨条藻共培养的结果无明显影响,中肋骨条藻的K均上升40%,而抑食金球藻的K值均下降60%~70%。结果说明,种间竞争除了共培养藻固有的相互作用关系因素外,也受到微藻间温度适应性差异的影响。在20℃条件下三种藻混合,抑食金球藻K的抑制率达到最高为79%,而中肋骨条藻K的促进率达到最高为108%,这可能表明三者之间的相互作用存在协同效应。
Mono,bi,and trialgal cultures were applied to Aureococcus anophagefferens,Skeletonema costatum,and Chattonella marina under two temperatures of 20℃and 25℃,to investigate speciesspecific interaction and competition in different temperatures.Single cultures showed the environmental carry capacity(K)for A.anophagefferens and S.costatum were significantly reduced by increased temperature,indicating they are sensitive to rising temperature.In contrast,the inherent growth rate(r)for C.marina significantly increased at 25℃whereas K remained the same as that at 20℃.In contrast to the death under A.anophagefferens addition at 20℃,K of C.marina increased 120%at 25℃.Although r of S.costatum was promoted by C.marina addition at both temperatures,its K showed from 43%increase to 48%decrease from 20℃to 25℃.The change of temperature did not influence the results of coculture of S.costatum and A.anophagefferens with 40%increases and 60%70%decreases of K at both temperatures.The results of bicultures indicated that interspecies competition is not only influenced by fixed interaction relationship of cocultured species,but also by difference of algal temperature adaptability.In trialgal cultures at 20℃,the inhibition rate of A.anophagefferens and the stimulation rate of S.costatum both reached the highest of 79%and 108%,respectively,which probably illuminated a synergistic effect within three algal interaction.
作者
郑承志
左丽明
马旺
朱琴
王火火
吕颂辉
陈亨
黄凯旋
ZHENG Chengzhi;ZUO Liming;MA Wang;ZHU Qin;WANG Huohuo;LÜSonghui;CHEN Heng;HUANG Kaixuan(Research Center for Harmful Algae and Marine Biology,Jinan University,Guangzhou 510632,China;Key Laboratory of Aquatic Eutrophication and Control of Harmful Algae Blooms of Guangdong Higher Education Institutes,Guangzhou 510632,China;Hebei Prospecting Institute of Hydro-engineering Geology,Shijiazhuang 050021,China)
出处
《热带海洋学报》
CAS
CSCD
北大核心
2021年第3期124-131,共8页
Journal of Tropical Oceanography
基金
国家自然科学基金(41876173)
河北省自然资源厅项目(454-0503-JBN-XCLS)。
关键词
抑食金球藻
中肋骨条藻
海洋卡盾藻
藻华
种间竞争
温度
Aureococcus anophagefferens
Skeletonema costatum
Chattonella marina
interspecies competition
algae bloom
temperature
