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首页 > 中国极地考察知识库 > 成果信息库 > 已审查 北极王湾海域浮游植物对光照和盐度变化的适应性研究

北极王湾海域浮游植物对光照和盐度变化的适应性研究

【标题】北极王湾海域浮游植物对光照和盐度变化的适应性研究

【Title】ADAPTATION OF PHYTOPLANKTON COMMUNITIES TO LIGHT AND SALINITY VARIATION IN KONGSFJORDEN (SPITSBERGEN), ARCTIC

【DOI】10.13679/j.jdyj.2014.2.230

【作者】 崔世开; 何剑锋; 何培民; 张芳; 林凌; 马玉欣

【Author】 Cui Shikai ; He Jianfeng ; He Peimin ; Zhang Fang ; Lin Ling ; Ma Yuxin

【期刊】极地研究

【Journal】

【期刊年份】2014

【卷】26

【期】2

【关键词】 浮游植物; 光照; 盐度; 王湾; 北极

【Keywords】 phytoplankton; light; salinity; Kongsfjorden; Arctic

【摘要】 2006年夏末,对北极黄河站附近的王湾(Kongsfjorden)海域基础环境特征进行调查,并采用模拟实验研究了该海域浮游植物对光照和盐度变化的适应性。结果显示:浮游植物群落在无光照条件下培养一天或者一周后,叶绿素a浓度基本保持稳定或略有下降;随后将其置于自然光下培养,叶绿素a浓度呈现开始明显下降、而后稳步上升的趋势。在盐度实验中,稀释倍率为10%时,浮游植物群落生长速率达到最大值,但将稀释倍率增大到一定程度(≥40%)时,低盐会限制浮游植物生长。研究显示,夏末王湾海域浮游植物群落对低光照环境具有一定的适应性;另外,由于低稀释率能促进浮游植物的生长,外湾由于受到融水影响的程度较小,因而有益于浮游植物的生长。

【Abstract】The basic environmental variables and adaptability of phytoplankton communities to low light and salinity were studied using incubation experiments in Kongsfjorden, a high Arctic fjord of Spitsbergen, in late summer 2006. Chlorophyll a concentrations were steady or decreased slightly in darkness after one day or one week incubation. Chlorophyll a concentrations showed an initial decline when exposed to natural light after one week incubation in darkness, and then increased significantly. In a salinity experiment, the maximal growth rate was observed at a dilution ratio of 10%, however, higher dilution ratios (≥40%) had an obvious negative effect on phytoplankton growth. We suggest that the phytoplankton communities in fjords in late summer are darkness adapted, and the inflow of glacial melt water is favorable for phytoplankton growth in the outer fjords where the influence of freshwater is limited.

【基金/项目】 北极黄河站夏季冰川消融对近岸海域微型浮游植物群落的调控作用研究 ; 南、北极海洋微微型浮游植物群落及其生态作用研究

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