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1天或者1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浓度呈现先明显下降、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，湾外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。%The basic environmental variables and adaptability of phytoplankton communities to low light and salinity were studied using incubation experiments during the late summer in 2006 in Kongsfjorden,which is a high Arctic fjord in Spitsbergen.Chlorophyll a concentrations were steady or decreased slightly after 1 day or 1 week of incubation in darkness.The Chlorophyll a concentrations showed an initial decline when exposed to natural light after 1 week of incubation in darkness,and then increased significantly.In the salinity experiment,the maximal growth rate was observed at a dilution ratio of 1 0%.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 adapted to dark-ness,and the inflow of glacial melt water is favorable for phytoplankton growth in the outer fjords where the influ-ence of freshwater is limited.
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