盐度和透明度对强壮硬毛藻生长发育的影响
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摘要
在实验室培养条件下,以采自辽宁大连的强壮硬毛藻为试验对象,对其在不同盐度和透明度条件下的生长发育情况进行研究。设置10、20、30、40、50 5个盐度组,设置40、60、80、120、140 cm 5个透明度组,试验采用单因素方差分析,只改变其中一个环境因子,其余环境因子不变,对强壮硬毛藻进行分组培养,然后对其日特定生长率进行测定与分析。试验结果显示,盐度和透明度对强壮硬毛藻的生长发育均有一定影响。藻体生长的适宜盐度为30～40,其中在盐度为30时,藻体的日特定生长速率最高,达65%,随盐度的继续升高,强壮硬毛藻的日特定生长率呈下降趋势,在盐度达到50时,藻体出现死亡现象;在透明度高于120 cm时,藻体生长状况良好,透明度低于120 cm时,藻体的生长由于水下光照条件的限制而受到了明显的抑制。本试验表明,强壮硬毛藻为广盐性种,且高盐、低透明度条件对强壮硬毛藻的生长发育有一定抑制作用,为强壮硬毛藻的防治提供了一定理论依据。
The growth and development were investigated in green alga Chaetomorpha valida collected from Dalian, Liaoning province under a salinity of 10, 20, 30, 40, and 50, and transparency of 40, 60, 80, 120, and 140 cm in one factor experiments. The results showed that the growth and development of the green alga were affected by both salinity and transparency in certain extent, with appropriate salinity range of 30—40. The green alga had the maximal daily specific growth rate(65%) at a salinity of 30, and then declined as the salinity increased, even died at a salinity of 50. The green alga grew well at transparency of over 120 cm, and were inhibited at transparency of below 120 cm due to the limitation of underwater light condition. The findings indicated that growth of the green alga as an euryhaline species is inhibited under high salinity and low transparency conditions, which provided a theoretical basis for the environmental monitoring and surveillance.
The growth and development were investigated in green alga Chaetomorpha valida collected from Dalian, Liaoning province under a salinity of 10, 20, 30, 40, and 50, and transparency of 40, 60, 80, 120, and 140 cm in one factor experiments. The results showed that the growth and development of the green alga were affected by both salinity and transparency in certain extent, with appropriate salinity range of 30—40. The green alga had the maximal daily specific growth rate(65%) at a salinity of 30, and then declined as the salinity increased, even died at a salinity of 50. The green alga grew well at transparency of over 120 cm, and were inhibited at transparency of below 120 cm due to the limitation of underwater light condition. The findings indicated that growth of the green alga as an euryhaline species is inhibited under high salinity and low transparency conditions, which provided a theoretical basis for the environmental monitoring and surveillance.
引文
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[3] South G R,Skelton P A.Catalogue of the marine benthic macroalgae of the Fiji Islands,South Pacific[J].Australian Systematic Botany,2003,16(6):699-758.
[4] 邓蕴彦,汤晓荣,黄冰心,等.强壮硬毛藻(Chaetomorpha valida)的温度性质及其在中国海藻区系中的扩散潜力[J].海洋与湖沼,2011,42(3):404-408.
[5] Gao L,Zhang L H,Hou J Z,et al .Decomposition of macroalgal blooms influences phosphorus release from the sediments and implications for coastal restoration in Swan Lake,Shandong,China[J].Ecological Engineering,2013(60):19-28.
[6] 丁兰平,李雯诗,谭华强,等.温度和盐度对短节硬毛藻(Chaetomorpha brachygona Harvey)生长发育的影响研究[J].海洋与湖沼,2015,46(1):191-196.
[7] 于仁成,刘东艳.我国近海藻华灾害现状、演变趋势与应对策略[J].中国科学院院刊,2016(10):1167-1174.
[8] Deng Y,Tang X,Huang B,et al.Effect of temperature and irradiance on the growth and reproduction of the green macroalga,Chaetomorpha valida(Cladophoraceae,Chlorophyta)[J].Journal of Applied Phycology,2012,24(4):927-933.
[9] Deng Y,Tang X,Zhan Z,et al.Culture observation and molecular phylogenetic analysis on the blooming green alga Chaetomorpha valida(Cladophorales,Chlorophyta) from China[J].Chinese Journal of Oceanology and Limnology,2013,31(3):552-559.
[10] Deng Y,Zhan Z,Tang X,et al.Molecular cloning and expression analysis of RbcL cDNA from the bloom-forming green alga Chaetomorpha valida(Cladophorales,Chlorophyta)[J].Journal of Applied Phycology,2014,26(4):1853-1861.
[11] Deng Y,Zhan Z,Tang X,et al.Molecular cloning and characterization of an Hsp70 gene from the bloom green alga Chaetomorpha valida(Cladophorales,Chlorophyta)[J].Journal of Applied Phycology,2015,27(1):489-497.
[12] 顾晓光,白艳丽,程锦.塞氏盘法对水质透明度的测定[J].辽宁城乡环境科技,2005,25(5):21-22.
[13] 郭瑾,杨维东,刘洁生,等.温度、盐度和光照对球形棕囊藻生长和产毒的影响研究[J].环境科学学报,2007,27(8):1341-1346.
[14] 丁兰平,孙国栋,黄冰心,等.温度和盐度对刺枝鱼栖苔(Acanthophora spicifera)(红藻门,松节藻科)生长及其几种光合色素的影响[J].海洋与湖沼,2013,44(4):913-918.
[15] 杨宇峰,宋金铭,林小涛,等.大型海藻栽培及其在近海环境的生态作用[J].海洋环境科学,2005,24(2):77-80.
[16] 安鑫龙,李雪梅,徐春霞,等.大型海藻对近海环境的生态作用[J].水产科学,2010,29(2):115-119.
[17] 浙江省水产厅,上海自然博物馆.浙江海藻原色图谱[M].杭州:浙江科学技术出版社,1983.
[18] 钱树本,刘东艳,孙军.海藻学[M].青岛:中国海洋大学出版社,2005.
[19] 刘峰,逄少军.黄海浒苔绿潮及其溯源研究进展[J].海洋科学进展,2012,30(3):441-449.
[20] 夏斌,马绍赛,崔毅,等.黄海绿潮(浒苔)暴发区温盐、溶解氧和营养盐的分布特征及其与绿潮发生的关系[J].渔业科学进展,2009,30(5):94-101.
[21] 吴玲娟,曹丛华,高松,等.我国绿潮发生发展机理研究进展[J].海洋科学,2013,37(12):118-121.
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